/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 20:26:10,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 20:26:10,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 20:26:10,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 20:26:10,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 20:26:10,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 20:26:10,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 20:26:10,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 20:26:10,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 20:26:10,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 20:26:10,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 20:26:10,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 20:26:10,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 20:26:10,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 20:26:10,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 20:26:10,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 20:26:10,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 20:26:10,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 20:26:10,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 20:26:10,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 20:26:10,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 20:26:10,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 20:26:10,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 20:26:10,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 20:26:10,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 20:26:10,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 20:26:10,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 20:26:10,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 20:26:10,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 20:26:10,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 20:26:10,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 20:26:10,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 20:26:10,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 20:26:10,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 20:26:10,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 20:26:10,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 20:26:10,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 20:26:10,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 20:26:10,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 20:26:10,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 20:26:10,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 20:26:10,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 20:26:10,252 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 20:26:10,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 20:26:10,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 20:26:10,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 20:26:10,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 20:26:10,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 20:26:10,254 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 20:26:10,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 20:26:10,255 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 20:26:10,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 20:26:10,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 20:26:10,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 20:26:10,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 20:26:10,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 20:26:10,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 20:26:10,256 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 20:26:10,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 20:26:10,256 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 20:26:10,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 20:26:10,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 20:26:10,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 20:26:10,256 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 20:26:10,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 20:26:10,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 20:26:10,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 20:26:10,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 20:26:10,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 20:26:10,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 20:26:10,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 20:26:10,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 20:26:10,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-12 20:26:10,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 20:26:10,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 20:26:10,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 20:26:10,522 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 20:26:10,523 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 20:26:10,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-12-12 20:26:11,525 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 20:26:11,715 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 20:26:11,715 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-12-12 20:26:11,719 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ae9d8153/c95c0c608ef34459967fdcc2591b5fcb/FLAGe53e6398e [2022-12-12 20:26:11,731 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ae9d8153/c95c0c608ef34459967fdcc2591b5fcb [2022-12-12 20:26:11,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 20:26:11,734 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 20:26:11,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 20:26:11,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 20:26:11,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 20:26:11,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3436244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11, skipping insertion in model container [2022-12-12 20:26:11,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 20:26:11,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 20:26:11,841 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:26:11,842 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:26:11,846 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:26:11,848 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:26:11,855 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-12-12 20:26:11,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 20:26:11,866 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 20:26:11,881 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:26:11,882 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:26:11,883 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 20:26:11,885 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 20:26:11,891 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-12-12 20:26:11,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 20:26:11,906 INFO L208 MainTranslator]: Completed translation [2022-12-12 20:26:11,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11 WrapperNode [2022-12-12 20:26:11,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 20:26:11,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 20:26:11,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 20:26:11,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 20:26:11,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,933 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-12-12 20:26:11,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 20:26:11,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 20:26:11,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 20:26:11,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 20:26:11,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,967 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 20:26:11,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 20:26:11,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 20:26:11,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 20:26:11,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (1/1) ... [2022-12-12 20:26:11,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 20:26:11,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:11,998 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) [2022-12-12 20:26:12,000 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 [2022-12-12 20:26:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 20:26:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 20:26:12,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 20:26:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 20:26:12,028 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 20:26:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 20:26:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 20:26:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 20:26:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 20:26:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 20:26:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 20:26:12,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 20:26:12,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 20:26:12,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 20:26:12,030 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 20:26:12,112 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 20:26:12,114 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 20:26:12,273 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 20:26:12,301 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 20:26:12,301 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-12 20:26:12,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 08:26:12 BoogieIcfgContainer [2022-12-12 20:26:12,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 20:26:12,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 20:26:12,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 20:26:12,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 20:26:12,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 08:26:11" (1/3) ... [2022-12-12 20:26:12,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9eac42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 08:26:12, skipping insertion in model container [2022-12-12 20:26:12,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:26:11" (2/3) ... [2022-12-12 20:26:12,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9eac42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 08:26:12, skipping insertion in model container [2022-12-12 20:26:12,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 08:26:12" (3/3) ... [2022-12-12 20:26:12,309 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-12-12 20:26:12,321 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 20:26:12,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 20:26:12,321 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 20:26:12,368 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 20:26:12,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 77 transitions, 170 flow [2022-12-12 20:26:12,454 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-12-12 20:26:12,454 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 20:26:12,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 6/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 39 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-12-12 20:26:12,457 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 77 transitions, 170 flow [2022-12-12 20:26:12,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 67 transitions, 146 flow [2022-12-12 20:26:12,461 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 20:26:12,478 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 67 transitions, 146 flow [2022-12-12 20:26:12,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 67 transitions, 146 flow [2022-12-12 20:26:12,499 INFO L130 PetriNetUnfolder]: 6/67 cut-off events. [2022-12-12 20:26:12,499 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 20:26:12,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 6/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-12-12 20:26:12,501 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 67 transitions, 146 flow [2022-12-12 20:26:12,501 INFO L226 LiptonReduction]: Number of co-enabled transitions 404 [2022-12-12 20:26:14,292 INFO L241 LiptonReduction]: Total number of compositions: 52 [2022-12-12 20:26:14,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 20:26:14,310 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;@515290c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 20:26:14,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 20:26:14,314 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-12 20:26:14,314 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 20:26:14,314 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:14,315 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:14,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:14,319 INFO L85 PathProgramCache]: Analyzing trace with hash 791724945, now seen corresponding path program 1 times [2022-12-12 20:26:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:14,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141211502] [2022-12-12 20:26:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:14,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:14,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:14,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141211502] [2022-12-12 20:26:14,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141211502] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:26:14,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:26:14,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 20:26:14,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090370505] [2022-12-12 20:26:14,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:26:14,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:26:14,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:14,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:26:14,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 20:26:14,644 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 20:26:14,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:14,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:14,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 20:26:14,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:14,706 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2022-12-12 20:26:14,707 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-12 20:26:14,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 262 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2022-12-12 20:26:14,710 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2022-12-12 20:26:14,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2022-12-12 20:26:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 20:26:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 20:26:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2022-12-12 20:26:14,720 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2022-12-12 20:26:14,722 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2022-12-12 20:26:14,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 21 transitions, 97 flow [2022-12-12 20:26:14,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 21 transitions, 97 flow [2022-12-12 20:26:14,725 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 97 flow [2022-12-12 20:26:14,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:14,726 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:14,726 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:14,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 20:26:14,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:14,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:14,728 INFO L85 PathProgramCache]: Analyzing trace with hash -854850643, now seen corresponding path program 1 times [2022-12-12 20:26:14,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:14,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204613062] [2022-12-12 20:26:14,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:14,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:14,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:14,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204613062] [2022-12-12 20:26:14,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204613062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:26:14,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:26:14,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 20:26:14,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523188784] [2022-12-12 20:26:14,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:26:14,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:26:14,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:14,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:26:14,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 20:26:14,888 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 20:26:14,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:14,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:14,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 20:26:14,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:14,960 INFO L130 PetriNetUnfolder]: 79/149 cut-off events. [2022-12-12 20:26:14,960 INFO L131 PetriNetUnfolder]: For 46/48 co-relation queries the response was YES. [2022-12-12 20:26:14,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 149 events. 79/149 cut-off events. For 46/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 447 event pairs, 24 based on Foata normal form. 6/124 useless extension candidates. Maximal degree in co-relation 339. Up to 110 conditions per place. [2022-12-12 20:26:14,963 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 32 selfloop transitions, 4 changer transitions 6/43 dead transitions. [2022-12-12 20:26:14,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 284 flow [2022-12-12 20:26:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 20:26:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 20:26:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 34 transitions. [2022-12-12 20:26:14,965 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2022-12-12 20:26:14,965 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2022-12-12 20:26:14,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 43 transitions, 284 flow [2022-12-12 20:26:14,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 37 transitions, 242 flow [2022-12-12 20:26:14,968 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 37 transitions, 242 flow [2022-12-12 20:26:14,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:14,968 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:14,968 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:14,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 20:26:14,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:14,970 INFO L85 PathProgramCache]: Analyzing trace with hash 307869201, now seen corresponding path program 2 times [2022-12-12 20:26:14,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:14,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9166549] [2022-12-12 20:26:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:14,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:15,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9166549] [2022-12-12 20:26:15,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9166549] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270163584] [2022-12-12 20:26:15,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:26:15,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:15,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:15,155 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) [2022-12-12 20:26:15,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 20:26:15,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 20:26:15,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 20:26:15,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:26:15,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 20:26:15,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270163584] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:26:15,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 20:26:15,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-12 20:26:15,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715421461] [2022-12-12 20:26:15,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:26:15,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:26:15,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:26:15,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-12 20:26:15,288 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 20:26:15,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 37 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:15,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:15,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 20:26:15,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:15,336 INFO L130 PetriNetUnfolder]: 64/114 cut-off events. [2022-12-12 20:26:15,336 INFO L131 PetriNetUnfolder]: For 62/74 co-relation queries the response was YES. [2022-12-12 20:26:15,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 114 events. 64/114 cut-off events. For 62/74 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 274 event pairs, 16 based on Foata normal form. 12/106 useless extension candidates. Maximal degree in co-relation 364. Up to 86 conditions per place. [2022-12-12 20:26:15,337 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 25 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2022-12-12 20:26:15,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 30 transitions, 252 flow [2022-12-12 20:26:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 20:26:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 20:26:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2022-12-12 20:26:15,339 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2022-12-12 20:26:15,339 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2022-12-12 20:26:15,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 30 transitions, 252 flow [2022-12-12 20:26:15,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 30 transitions, 252 flow [2022-12-12 20:26:15,340 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 30 transitions, 252 flow [2022-12-12 20:26:15,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:15,341 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:15,341 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:15,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:15,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:15,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:15,542 INFO L85 PathProgramCache]: Analyzing trace with hash 695527083, now seen corresponding path program 1 times [2022-12-12 20:26:15,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:15,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638979413] [2022-12-12 20:26:15,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:15,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:26:15,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:15,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638979413] [2022-12-12 20:26:15,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638979413] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:15,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681864123] [2022-12-12 20:26:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:15,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:15,648 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) [2022-12-12 20:26:15,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 20:26:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:15,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 20:26:15,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:26:15,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:26:15,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681864123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:15,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:15,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-12 20:26:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256494785] [2022-12-12 20:26:15,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:15,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 20:26:15,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 20:26:15,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-12 20:26:15,916 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 20:26:15,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 252 flow. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:15,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:15,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 20:26:15,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:16,013 INFO L130 PetriNetUnfolder]: 74/132 cut-off events. [2022-12-12 20:26:16,014 INFO L131 PetriNetUnfolder]: For 88/90 co-relation queries the response was YES. [2022-12-12 20:26:16,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 132 events. 74/132 cut-off events. For 88/90 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 341 event pairs, 8 based on Foata normal form. 2/114 useless extension candidates. Maximal degree in co-relation 542. Up to 109 conditions per place. [2022-12-12 20:26:16,015 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 41 selfloop transitions, 9 changer transitions 0/51 dead transitions. [2022-12-12 20:26:16,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 51 transitions, 525 flow [2022-12-12 20:26:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 20:26:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 20:26:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 39 transitions. [2022-12-12 20:26:16,016 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-12-12 20:26:16,016 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2022-12-12 20:26:16,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 51 transitions, 525 flow [2022-12-12 20:26:16,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 51 transitions, 525 flow [2022-12-12 20:26:16,018 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 51 transitions, 525 flow [2022-12-12 20:26:16,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:16,018 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:16,018 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:16,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:16,224 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,SelfDestructingSolverStorable3 [2022-12-12 20:26:16,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:16,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:16,225 INFO L85 PathProgramCache]: Analyzing trace with hash 940475947, now seen corresponding path program 2 times [2022-12-12 20:26:16,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:16,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385882911] [2022-12-12 20:26:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:16,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:16,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:16,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385882911] [2022-12-12 20:26:16,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385882911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:16,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771895715] [2022-12-12 20:26:16,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:26:16,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:16,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:16,443 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) [2022-12-12 20:26:16,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 20:26:16,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:26:16,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:26:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:16,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:16,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771895715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:16,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:16,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 2] total 8 [2022-12-12 20:26:16,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913720018] [2022-12-12 20:26:16,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:16,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 20:26:16,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:16,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 20:26:16,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-12 20:26:16,679 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 20:26:16,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 51 transitions, 525 flow. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:16,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:16,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 20:26:16,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:16,903 INFO L130 PetriNetUnfolder]: 166/298 cut-off events. [2022-12-12 20:26:16,903 INFO L131 PetriNetUnfolder]: For 145/145 co-relation queries the response was YES. [2022-12-12 20:26:16,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 298 events. 166/298 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1053 event pairs, 4 based on Foata normal form. 2/238 useless extension candidates. Maximal degree in co-relation 1573. Up to 269 conditions per place. [2022-12-12 20:26:16,907 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 65 selfloop transitions, 25 changer transitions 23/114 dead transitions. [2022-12-12 20:26:16,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 114 transitions, 1416 flow [2022-12-12 20:26:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 20:26:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 20:26:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 87 transitions. [2022-12-12 20:26:16,910 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2022-12-12 20:26:16,912 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2022-12-12 20:26:16,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 114 transitions, 1416 flow [2022-12-12 20:26:16,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 91 transitions, 1113 flow [2022-12-12 20:26:16,915 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 91 transitions, 1113 flow [2022-12-12 20:26:16,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:16,915 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:16,915 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:16,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:17,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:17,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:17,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1639774485, now seen corresponding path program 3 times [2022-12-12 20:26:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:17,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328900580] [2022-12-12 20:26:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:17,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:17,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:17,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328900580] [2022-12-12 20:26:17,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328900580] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:17,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492483077] [2022-12-12 20:26:17,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:26:17,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:17,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:17,271 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) [2022-12-12 20:26:17,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 20:26:17,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:26:17,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:17,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 20:26:17,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:17,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:17,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492483077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:17,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:17,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-12 20:26:17,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89561219] [2022-12-12 20:26:17,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:17,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 20:26:17,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:17,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 20:26:17,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-12 20:26:17,532 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:17,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 91 transitions, 1113 flow. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:17,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:17,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:17,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:18,268 INFO L130 PetriNetUnfolder]: 297/555 cut-off events. [2022-12-12 20:26:18,269 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-12-12 20:26:18,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3898 conditions, 555 events. 297/555 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2364 event pairs, 12 based on Foata normal form. 1/454 useless extension candidates. Maximal degree in co-relation 2836. Up to 521 conditions per place. [2022-12-12 20:26:18,273 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 169 selfloop transitions, 61 changer transitions 4/234 dead transitions. [2022-12-12 20:26:18,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 234 transitions, 3369 flow [2022-12-12 20:26:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 20:26:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 20:26:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 157 transitions. [2022-12-12 20:26:18,275 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2022-12-12 20:26:18,275 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2022-12-12 20:26:18,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 234 transitions, 3369 flow [2022-12-12 20:26:18,280 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 230 transitions, 3307 flow [2022-12-12 20:26:18,280 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 230 transitions, 3307 flow [2022-12-12 20:26:18,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:18,281 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:18,281 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:18,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:18,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:18,486 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:18,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:18,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1399450661, now seen corresponding path program 4 times [2022-12-12 20:26:18,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:18,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088588105] [2022-12-12 20:26:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:18,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:18,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:18,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088588105] [2022-12-12 20:26:18,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088588105] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:18,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775500052] [2022-12-12 20:26:18,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:26:18,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:18,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:18,677 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) [2022-12-12 20:26:18,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 20:26:18,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:26:18,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:18,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 20:26:18,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:18,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:18,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775500052] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:18,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:18,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-12 20:26:18,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692231371] [2022-12-12 20:26:18,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:18,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 20:26:18,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 20:26:18,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:26:18,904 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:18,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 230 transitions, 3307 flow. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:18,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:18,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:18,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:19,258 INFO L130 PetriNetUnfolder]: 437/816 cut-off events. [2022-12-12 20:26:19,258 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2022-12-12 20:26:19,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6551 conditions, 816 events. 437/816 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3996 event pairs, 4 based on Foata normal form. 0/664 useless extension candidates. Maximal degree in co-relation 4746. Up to 776 conditions per place. [2022-12-12 20:26:19,264 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 283 selfloop transitions, 47 changer transitions 0/330 dead transitions. [2022-12-12 20:26:19,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 330 transitions, 5410 flow [2022-12-12 20:26:19,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 20:26:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 20:26:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 78 transitions. [2022-12-12 20:26:19,267 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-12-12 20:26:19,267 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2022-12-12 20:26:19,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 330 transitions, 5410 flow [2022-12-12 20:26:19,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 330 transitions, 5410 flow [2022-12-12 20:26:19,275 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 330 transitions, 5410 flow [2022-12-12 20:26:19,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:19,275 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:19,275 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:19,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:19,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:19,480 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:19,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1897307653, now seen corresponding path program 5 times [2022-12-12 20:26:19,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:19,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900129036] [2022-12-12 20:26:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:19,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:19,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900129036] [2022-12-12 20:26:19,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900129036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627676659] [2022-12-12 20:26:19,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:26:19,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:19,656 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) [2022-12-12 20:26:19,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 20:26:19,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:26:19,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:19,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 20:26:19,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:19,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:19,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627676659] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:19,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:19,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-12 20:26:19,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936813499] [2022-12-12 20:26:19,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:19,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 20:26:19,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:19,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 20:26:19,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-12-12 20:26:19,890 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:19,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 330 transitions, 5410 flow. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:19,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:19,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:19,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:20,439 INFO L130 PetriNetUnfolder]: 534/991 cut-off events. [2022-12-12 20:26:20,439 INFO L131 PetriNetUnfolder]: For 297/297 co-relation queries the response was YES. [2022-12-12 20:26:20,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8957 conditions, 991 events. 534/991 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5111 event pairs, 8 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 6415. Up to 951 conditions per place. [2022-12-12 20:26:20,447 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 337 selfloop transitions, 77 changer transitions 0/414 dead transitions. [2022-12-12 20:26:20,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 414 transitions, 7624 flow [2022-12-12 20:26:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 20:26:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 20:26:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 115 transitions. [2022-12-12 20:26:20,448 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2022-12-12 20:26:20,449 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 75 predicate places. [2022-12-12 20:26:20,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 414 transitions, 7624 flow [2022-12-12 20:26:20,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 414 transitions, 7624 flow [2022-12-12 20:26:20,477 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 414 transitions, 7624 flow [2022-12-12 20:26:20,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:20,478 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:20,478 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:20,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-12 20:26:20,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:20,683 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:20,683 INFO L85 PathProgramCache]: Analyzing trace with hash -592736831, now seen corresponding path program 6 times [2022-12-12 20:26:20,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:20,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127022846] [2022-12-12 20:26:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:20,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:20,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127022846] [2022-12-12 20:26:20,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127022846] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579873673] [2022-12-12 20:26:20,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:26:20,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:20,800 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) [2022-12-12 20:26:20,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 20:26:20,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 20:26:20,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:20,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:26:20,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:20,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:21,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579873673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:21,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:21,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-12 20:26:21,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934812156] [2022-12-12 20:26:21,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:21,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 20:26:21,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 20:26:21,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:26:21,083 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:21,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 414 transitions, 7624 flow. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:21,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:21,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:21,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:21,796 INFO L130 PetriNetUnfolder]: 620/1177 cut-off events. [2022-12-12 20:26:21,797 INFO L131 PetriNetUnfolder]: For 291/291 co-relation queries the response was YES. [2022-12-12 20:26:21,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11825 conditions, 1177 events. 620/1177 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6541 event pairs, 2 based on Foata normal form. 6/957 useless extension candidates. Maximal degree in co-relation 8372. Up to 1137 conditions per place. [2022-12-12 20:26:21,808 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 422 selfloop transitions, 156 changer transitions 23/601 dead transitions. [2022-12-12 20:26:21,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 601 transitions, 12217 flow [2022-12-12 20:26:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-12 20:26:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-12 20:26:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 154 transitions. [2022-12-12 20:26:21,810 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2022-12-12 20:26:21,810 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2022-12-12 20:26:21,810 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 601 transitions, 12217 flow [2022-12-12 20:26:21,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 578 transitions, 11757 flow [2022-12-12 20:26:21,822 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 578 transitions, 11757 flow [2022-12-12 20:26:21,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:21,822 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:21,822 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:21,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:22,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:22,030 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:22,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1154501797, now seen corresponding path program 7 times [2022-12-12 20:26:22,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:22,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576139940] [2022-12-12 20:26:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:22,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:22,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:22,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576139940] [2022-12-12 20:26:22,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576139940] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:22,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066372084] [2022-12-12 20:26:22,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:26:22,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:22,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:22,156 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) [2022-12-12 20:26:22,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 20:26:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:22,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:26:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:22,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:22,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066372084] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:22,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:22,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-12-12 20:26:22,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958364057] [2022-12-12 20:26:22,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:22,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 20:26:22,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:22,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 20:26:22,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-12 20:26:22,417 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:22,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 578 transitions, 11757 flow. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:22,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:22,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:22,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:23,190 INFO L130 PetriNetUnfolder]: 673/1278 cut-off events. [2022-12-12 20:26:23,191 INFO L131 PetriNetUnfolder]: For 333/333 co-relation queries the response was YES. [2022-12-12 20:26:23,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14120 conditions, 1278 events. 673/1278 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7168 event pairs, 4 based on Foata normal form. 8/1070 useless extension candidates. Maximal degree in co-relation 13236. Up to 1230 conditions per place. [2022-12-12 20:26:23,200 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 479 selfloop transitions, 184 changer transitions 8/671 dead transitions. [2022-12-12 20:26:23,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 671 transitions, 15008 flow [2022-12-12 20:26:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 20:26:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 20:26:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 117 transitions. [2022-12-12 20:26:23,202 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2022-12-12 20:26:23,203 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2022-12-12 20:26:23,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 671 transitions, 15008 flow [2022-12-12 20:26:23,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 663 transitions, 14826 flow [2022-12-12 20:26:23,214 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 663 transitions, 14826 flow [2022-12-12 20:26:23,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:23,215 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:23,215 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:23,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:23,421 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,SelfDestructingSolverStorable9 [2022-12-12 20:26:23,422 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:23,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:23,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2082959363, now seen corresponding path program 8 times [2022-12-12 20:26:23,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:23,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723236796] [2022-12-12 20:26:23,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:23,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:23,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:23,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723236796] [2022-12-12 20:26:23,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723236796] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:23,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882227342] [2022-12-12 20:26:23,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:26:23,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:23,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:23,545 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:26:23,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 20:26:23,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:26:23,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:26:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:23,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:23,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882227342] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:23,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:23,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-12-12 20:26:23,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123220485] [2022-12-12 20:26:23,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:23,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 20:26:23,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:23,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 20:26:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:26:23,943 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:23,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 663 transitions, 14826 flow. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:23,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:23,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:23,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:24,578 INFO L130 PetriNetUnfolder]: 883/1722 cut-off events. [2022-12-12 20:26:24,578 INFO L131 PetriNetUnfolder]: For 462/462 co-relation queries the response was YES. [2022-12-12 20:26:24,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20778 conditions, 1722 events. 883/1722 cut-off events. For 462/462 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10695 event pairs, 6 based on Foata normal form. 8/1420 useless extension candidates. Maximal degree in co-relation 19440. Up to 1674 conditions per place. [2022-12-12 20:26:24,589 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 729 selfloop transitions, 192 changer transitions 8/929 dead transitions. [2022-12-12 20:26:24,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 929 transitions, 22680 flow [2022-12-12 20:26:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 20:26:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 20:26:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 88 transitions. [2022-12-12 20:26:24,591 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34509803921568627 [2022-12-12 20:26:24,591 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 136 predicate places. [2022-12-12 20:26:24,591 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 929 transitions, 22680 flow [2022-12-12 20:26:24,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 921 transitions, 22488 flow [2022-12-12 20:26:24,607 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 921 transitions, 22488 flow [2022-12-12 20:26:24,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:24,607 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:24,607 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:24,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:24,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:24,816 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:24,816 INFO L85 PathProgramCache]: Analyzing trace with hash -335720735, now seen corresponding path program 9 times [2022-12-12 20:26:24,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:24,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735264130] [2022-12-12 20:26:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:24,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:24,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:24,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735264130] [2022-12-12 20:26:24,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735264130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:24,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194099341] [2022-12-12 20:26:24,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:26:24,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:24,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:24,953 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:26:24,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 20:26:25,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:26:25,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:25,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:26:25,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:25,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:25,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194099341] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:25,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:25,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-12-12 20:26:25,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094013980] [2022-12-12 20:26:25,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:25,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 20:26:25,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:25,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 20:26:25,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:26:25,344 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:25,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 921 transitions, 22488 flow. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:25,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:25,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:25,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:26,128 INFO L130 PetriNetUnfolder]: 920/1791 cut-off events. [2022-12-12 20:26:26,128 INFO L131 PetriNetUnfolder]: For 491/491 co-relation queries the response was YES. [2022-12-12 20:26:26,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23405 conditions, 1791 events. 920/1791 cut-off events. For 491/491 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 11251 event pairs, 4 based on Foata normal form. 8/1493 useless extension candidates. Maximal degree in co-relation 21617. Up to 1743 conditions per place. [2022-12-12 20:26:26,143 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 734 selfloop transitions, 234 changer transitions 8/976 dead transitions. [2022-12-12 20:26:26,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 976 transitions, 25787 flow [2022-12-12 20:26:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 20:26:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 20:26:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 90 transitions. [2022-12-12 20:26:26,144 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-12-12 20:26:26,144 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 149 predicate places. [2022-12-12 20:26:26,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 976 transitions, 25787 flow [2022-12-12 20:26:26,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 968 transitions, 25573 flow [2022-12-12 20:26:26,163 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 968 transitions, 25573 flow [2022-12-12 20:26:26,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:26,164 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:26,164 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:26,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:26,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-12 20:26:26,368 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:26,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:26,369 INFO L85 PathProgramCache]: Analyzing trace with hash 812064279, now seen corresponding path program 10 times [2022-12-12 20:26:26,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:26,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656845992] [2022-12-12 20:26:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:26,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:26,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:26,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656845992] [2022-12-12 20:26:26,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656845992] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:26,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222405442] [2022-12-12 20:26:26,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:26:26,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:26,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:26,494 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:26:26,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 20:26:26,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:26:26,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:26,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 20:26:26,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:26,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:26,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222405442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:26,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:26,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-12 20:26:26,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225865665] [2022-12-12 20:26:26,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:26,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 20:26:26,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:26,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 20:26:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-12-12 20:26:26,759 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:26,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 968 transitions, 25573 flow. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:26,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:26,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:26,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:28,235 INFO L130 PetriNetUnfolder]: 978/1915 cut-off events. [2022-12-12 20:26:28,235 INFO L131 PetriNetUnfolder]: For 516/516 co-relation queries the response was YES. [2022-12-12 20:26:28,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26948 conditions, 1915 events. 978/1915 cut-off events. For 516/516 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 12144 event pairs, 4 based on Foata normal form. 8/1595 useless extension candidates. Maximal degree in co-relation 24909. Up to 1867 conditions per place. [2022-12-12 20:26:28,250 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 808 selfloop transitions, 222 changer transitions 5/1035 dead transitions. [2022-12-12 20:26:28,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 1035 transitions, 29430 flow [2022-12-12 20:26:28,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 20:26:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 20:26:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 137 transitions. [2022-12-12 20:26:28,252 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.41515151515151516 [2022-12-12 20:26:28,252 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2022-12-12 20:26:28,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 1035 transitions, 29430 flow [2022-12-12 20:26:28,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 1030 transitions, 29287 flow [2022-12-12 20:26:28,278 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 1030 transitions, 29287 flow [2022-12-12 20:26:28,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:28,278 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:28,278 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:28,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:28,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-12 20:26:28,484 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:28,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1363665085, now seen corresponding path program 11 times [2022-12-12 20:26:28,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:28,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838107082] [2022-12-12 20:26:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:28,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:28,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:28,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838107082] [2022-12-12 20:26:28,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838107082] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:28,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561427027] [2022-12-12 20:26:28,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:26:28,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:28,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:28,825 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:26:28,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 20:26:28,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 20:26:28,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:28,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-12 20:26:28,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:29,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:26:29,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561427027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:29,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:29,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 17 [2022-12-12 20:26:29,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144970000] [2022-12-12 20:26:29,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:29,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:26:29,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:29,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:26:29,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:26:29,261 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:29,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 1030 transitions, 29287 flow. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:29,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:29,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:29,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:30,301 INFO L130 PetriNetUnfolder]: 1309/2564 cut-off events. [2022-12-12 20:26:30,301 INFO L131 PetriNetUnfolder]: For 675/675 co-relation queries the response was YES. [2022-12-12 20:26:30,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38674 conditions, 2564 events. 1309/2564 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 17440 event pairs, 8 based on Foata normal form. 18/2094 useless extension candidates. Maximal degree in co-relation 36111. Up to 2516 conditions per place. [2022-12-12 20:26:30,319 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 947 selfloop transitions, 154 changer transitions 270/1371 dead transitions. [2022-12-12 20:26:30,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 1371 transitions, 41772 flow [2022-12-12 20:26:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 20:26:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 20:26:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 92 transitions. [2022-12-12 20:26:30,320 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4717948717948718 [2022-12-12 20:26:30,321 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2022-12-12 20:26:30,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 1371 transitions, 41772 flow [2022-12-12 20:26:30,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 1101 transitions, 33464 flow [2022-12-12 20:26:30,343 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 1101 transitions, 33464 flow [2022-12-12 20:26:30,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:30,343 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:30,343 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:30,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:30,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-12 20:26:30,548 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:30,549 INFO L85 PathProgramCache]: Analyzing trace with hash -837403017, now seen corresponding path program 12 times [2022-12-12 20:26:30,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:30,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012955325] [2022-12-12 20:26:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:26:30,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:30,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012955325] [2022-12-12 20:26:30,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012955325] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:30,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292417021] [2022-12-12 20:26:30,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:26:30,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:30,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:30,643 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:26:30,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 20:26:30,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 20:26:30,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:30,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-12 20:26:30,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:26:30,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:31,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292417021] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:31,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:31,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2022-12-12 20:26:31,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782000322] [2022-12-12 20:26:31,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:31,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 20:26:31,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:31,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 20:26:31,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-12-12 20:26:31,069 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 20:26:31,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 1101 transitions, 33464 flow. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:31,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:31,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 20:26:31,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:31,854 INFO L130 PetriNetUnfolder]: 1074/2089 cut-off events. [2022-12-12 20:26:31,854 INFO L131 PetriNetUnfolder]: For 506/506 co-relation queries the response was YES. [2022-12-12 20:26:31,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33568 conditions, 2089 events. 1074/2089 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13356 event pairs, 10 based on Foata normal form. 8/1755 useless extension candidates. Maximal degree in co-relation 31543. Up to 2049 conditions per place. [2022-12-12 20:26:31,867 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 1049 selfloop transitions, 81 changer transitions 8/1141 dead transitions. [2022-12-12 20:26:31,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 1141 transitions, 36952 flow [2022-12-12 20:26:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 20:26:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 20:26:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 90 transitions. [2022-12-12 20:26:31,868 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-12-12 20:26:31,869 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 191 predicate places. [2022-12-12 20:26:31,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 1141 transitions, 36952 flow [2022-12-12 20:26:31,889 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 1133 transitions, 36690 flow [2022-12-12 20:26:31,889 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 1133 transitions, 36690 flow [2022-12-12 20:26:31,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:31,889 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:31,890 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:31,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-12 20:26:32,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 20:26:32,095 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash -842654569, now seen corresponding path program 13 times [2022-12-12 20:26:32,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:32,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639754999] [2022-12-12 20:26:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:32,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:32,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:32,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639754999] [2022-12-12 20:26:32,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639754999] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:32,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259295473] [2022-12-12 20:26:32,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:26:32,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:32,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:32,282 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:26:32,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 20:26:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:32,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 20:26:32,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:32,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:32,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259295473] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:32,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:32,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 20:26:32,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197837232] [2022-12-12 20:26:32,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:32,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:26:32,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:32,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:26:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:26:32,839 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:32,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 1133 transitions, 36690 flow. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:32,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:32,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:32,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:34,900 INFO L130 PetriNetUnfolder]: 1269/2452 cut-off events. [2022-12-12 20:26:34,900 INFO L131 PetriNetUnfolder]: For 595/595 co-relation queries the response was YES. [2022-12-12 20:26:34,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41856 conditions, 2452 events. 1269/2452 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16173 event pairs, 14 based on Foata normal form. 6/2042 useless extension candidates. Maximal degree in co-relation 39462. Up to 2409 conditions per place. [2022-12-12 20:26:34,916 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 1082 selfloop transitions, 258 changer transitions 6/1346 dead transitions. [2022-12-12 20:26:34,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 1346 transitions, 46270 flow [2022-12-12 20:26:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-12 20:26:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-12 20:26:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 148 transitions. [2022-12-12 20:26:34,917 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30833333333333335 [2022-12-12 20:26:34,917 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2022-12-12 20:26:34,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 1346 transitions, 46270 flow [2022-12-12 20:26:34,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 240 places, 1340 transitions, 46066 flow [2022-12-12 20:26:34,949 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 1340 transitions, 46066 flow [2022-12-12 20:26:34,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:34,950 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:34,950 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:34,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 20:26:35,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:35,151 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:35,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:35,151 INFO L85 PathProgramCache]: Analyzing trace with hash 904584059, now seen corresponding path program 14 times [2022-12-12 20:26:35,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:35,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393434244] [2022-12-12 20:26:35,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:35,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:35,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:35,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393434244] [2022-12-12 20:26:35,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393434244] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:35,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742288765] [2022-12-12 20:26:35,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:26:35,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:35,340 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:26:35,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 20:26:35,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:26:35,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:35,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 20:26:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:35,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:35,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742288765] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:35,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:35,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 20:26:35,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833360952] [2022-12-12 20:26:35,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:35,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 20:26:35,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:35,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 20:26:35,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-12 20:26:35,871 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:35,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 1340 transitions, 46066 flow. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:35,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:35,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:35,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:38,056 INFO L130 PetriNetUnfolder]: 1268/2443 cut-off events. [2022-12-12 20:26:38,056 INFO L131 PetriNetUnfolder]: For 590/590 co-relation queries the response was YES. [2022-12-12 20:26:38,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44146 conditions, 2443 events. 1268/2443 cut-off events. For 590/590 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 16028 event pairs, 12 based on Foata normal form. 12/2059 useless extension candidates. Maximal degree in co-relation 41762. Up to 2400 conditions per place. [2022-12-12 20:26:38,073 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 979 selfloop transitions, 358 changer transitions 12/1349 dead transitions. [2022-12-12 20:26:38,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 1349 transitions, 49079 flow [2022-12-12 20:26:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 20:26:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 20:26:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 153 transitions. [2022-12-12 20:26:38,075 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32903225806451614 [2022-12-12 20:26:38,075 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2022-12-12 20:26:38,075 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 1349 transitions, 49079 flow [2022-12-12 20:26:38,103 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 1337 transitions, 48638 flow [2022-12-12 20:26:38,103 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 1337 transitions, 48638 flow [2022-12-12 20:26:38,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:38,103 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:26:38,103 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:26:38,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-12 20:26:38,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-12 20:26:38,304 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:26:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:26:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1237817027, now seen corresponding path program 15 times [2022-12-12 20:26:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:26:38,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245638714] [2022-12-12 20:26:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:26:38,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:26:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:26:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:38,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:26:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245638714] [2022-12-12 20:26:38,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245638714] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:26:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533907132] [2022-12-12 20:26:38,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:26:38,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:26:38,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:26:38,481 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:26:38,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 20:26:38,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:26:38,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:26:38,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 20:26:38,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:26:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:38,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:26:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:26:47,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533907132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:26:47,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:26:47,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 20:26:47,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836765875] [2022-12-12 20:26:47,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:26:47,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:26:47,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:26:47,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:26:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=266, Unknown=1, NotChecked=0, Total=342 [2022-12-12 20:26:47,162 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:26:47,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 1337 transitions, 48638 flow. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:26:47,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:26:47,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:26:47,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:26:54,252 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 91 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 20:26:56,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-12 20:27:04,123 INFO L130 PetriNetUnfolder]: 1409/2706 cut-off events. [2022-12-12 20:27:04,123 INFO L131 PetriNetUnfolder]: For 636/636 co-relation queries the response was YES. [2022-12-12 20:27:04,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51607 conditions, 2706 events. 1409/2706 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 17976 event pairs, 4 based on Foata normal form. 12/2262 useless extension candidates. Maximal degree in co-relation 48859. Up to 2663 conditions per place. [2022-12-12 20:27:04,141 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 1246 selfloop transitions, 353 changer transitions 17/1616 dead transitions. [2022-12-12 20:27:04,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1616 transitions, 62043 flow [2022-12-12 20:27:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 20:27:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 20:27:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 104 transitions. [2022-12-12 20:27:04,143 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33015873015873015 [2022-12-12 20:27:04,144 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 268 predicate places. [2022-12-12 20:27:04,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 288 places, 1616 transitions, 62043 flow [2022-12-12 20:27:04,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 1599 transitions, 61394 flow [2022-12-12 20:27:04,174 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 1599 transitions, 61394 flow [2022-12-12 20:27:04,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:04,174 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:27:04,174 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:27:04,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 20:27:04,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 20:27:04,379 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:27:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:27:04,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1309911641, now seen corresponding path program 16 times [2022-12-12 20:27:04,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:27:04,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775861348] [2022-12-12 20:27:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:27:04,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:27:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:27:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:04,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:27:04,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775861348] [2022-12-12 20:27:04,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775861348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:27:04,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424035491] [2022-12-12 20:27:04,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:27:04,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:27:04,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:27:04,549 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:27:04,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 20:27:04,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:27:04,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:27:04,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 20:27:04,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:27:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:04,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:27:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:05,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424035491] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:27:05,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:27:05,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 20:27:05,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133443663] [2022-12-12 20:27:05,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:27:05,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 20:27:05,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:27:05,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 20:27:05,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-12 20:27:05,055 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:27:05,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 1599 transitions, 61394 flow. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:05,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:27:05,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:27:05,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:27:07,021 INFO L130 PetriNetUnfolder]: 1439/2736 cut-off events. [2022-12-12 20:27:07,021 INFO L131 PetriNetUnfolder]: For 628/628 co-relation queries the response was YES. [2022-12-12 20:27:07,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54912 conditions, 2736 events. 1439/2736 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 18005 event pairs, 0 based on Foata normal form. 16/2312 useless extension candidates. Maximal degree in co-relation 52227. Up to 2693 conditions per place. [2022-12-12 20:27:07,040 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 1167 selfloop transitions, 454 changer transitions 16/1637 dead transitions. [2022-12-12 20:27:07,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1637 transitions, 66118 flow [2022-12-12 20:27:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-12 20:27:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-12 20:27:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 135 transitions. [2022-12-12 20:27:07,042 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2022-12-12 20:27:07,042 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 291 predicate places. [2022-12-12 20:27:07,042 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 1637 transitions, 66118 flow [2022-12-12 20:27:07,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 309 places, 1621 transitions, 65466 flow [2022-12-12 20:27:07,075 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 1621 transitions, 65466 flow [2022-12-12 20:27:07,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:07,075 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:27:07,075 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:27:07,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 20:27:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:27:07,280 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:27:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:27:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1595791851, now seen corresponding path program 17 times [2022-12-12 20:27:07,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:27:07,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427796999] [2022-12-12 20:27:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:27:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:27:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:27:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:07,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:27:07,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427796999] [2022-12-12 20:27:07,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427796999] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:27:07,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447252904] [2022-12-12 20:27:07,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:27:07,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:27:07,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:27:07,508 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:27:07,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 20:27:07,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 20:27:07,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:27:07,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 20:27:07,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:27:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:07,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:27:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:07,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447252904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:27:07,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:27:07,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-12 20:27:07,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665350776] [2022-12-12 20:27:07,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:27:07,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 20:27:07,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:27:07,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 20:27:07,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-12 20:27:07,896 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:27:07,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 1621 transitions, 65466 flow. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:07,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:27:07,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:27:07,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:27:10,921 INFO L130 PetriNetUnfolder]: 2627/5126 cut-off events. [2022-12-12 20:27:10,922 INFO L131 PetriNetUnfolder]: For 1219/1219 co-relation queries the response was YES. [2022-12-12 20:27:10,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108058 conditions, 5126 events. 2627/5126 cut-off events. For 1219/1219 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 39497 event pairs, 0 based on Foata normal form. 0/4302 useless extension candidates. Maximal degree in co-relation 72508. Up to 5061 conditions per place. [2022-12-12 20:27:10,960 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 2711 selfloop transitions, 340 changer transitions 0/3051 dead transitions. [2022-12-12 20:27:10,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 3051 transitions, 129523 flow [2022-12-12 20:27:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 20:27:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-12 20:27:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 171 transitions. [2022-12-12 20:27:10,961 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3931034482758621 [2022-12-12 20:27:10,961 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 317 predicate places. [2022-12-12 20:27:10,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 3051 transitions, 129523 flow [2022-12-12 20:27:11,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 3051 transitions, 129523 flow [2022-12-12 20:27:11,067 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 3051 transitions, 129523 flow [2022-12-12 20:27:11,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:11,068 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:27:11,068 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:27:11,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-12 20:27:11,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:27:11,268 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:27:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:27:11,269 INFO L85 PathProgramCache]: Analyzing trace with hash -636348061, now seen corresponding path program 18 times [2022-12-12 20:27:11,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:27:11,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163357914] [2022-12-12 20:27:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:27:11,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:27:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:27:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:11,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:27:11,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163357914] [2022-12-12 20:27:11,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163357914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:27:11,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47404971] [2022-12-12 20:27:11,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:27:11,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:27:11,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:27:11,432 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:27:11,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 20:27:11,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 20:27:11,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:27:11,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 20:27:11,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:27:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:11,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:27:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:11,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47404971] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:27:11,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:27:11,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-12 20:27:11,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833790151] [2022-12-12 20:27:11,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:27:11,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:27:11,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:27:11,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:27:11,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:27:11,829 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:27:11,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 3051 transitions, 129523 flow. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:11,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:27:11,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:27:11,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:27:17,588 INFO L130 PetriNetUnfolder]: 2769/5390 cut-off events. [2022-12-12 20:27:17,589 INFO L131 PetriNetUnfolder]: For 1262/1262 co-relation queries the response was YES. [2022-12-12 20:27:17,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119016 conditions, 5390 events. 2769/5390 cut-off events. For 1262/1262 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 41923 event pairs, 0 based on Foata normal form. 0/4542 useless extension candidates. Maximal degree in co-relation 79704. Up to 5325 conditions per place. [2022-12-12 20:27:17,627 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 2839 selfloop transitions, 362 changer transitions 0/3201 dead transitions. [2022-12-12 20:27:17,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 3201 transitions, 142294 flow [2022-12-12 20:27:17,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-12 20:27:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-12 20:27:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 252 transitions. [2022-12-12 20:27:17,629 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2022-12-12 20:27:17,629 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 360 predicate places. [2022-12-12 20:27:17,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 380 places, 3201 transitions, 142294 flow [2022-12-12 20:27:17,699 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 380 places, 3201 transitions, 142294 flow [2022-12-12 20:27:17,700 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 3201 transitions, 142294 flow [2022-12-12 20:27:17,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:17,700 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:27:17,700 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:27:17,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-12 20:27:17,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:27:17,901 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:27:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:27:17,901 INFO L85 PathProgramCache]: Analyzing trace with hash -466690717, now seen corresponding path program 19 times [2022-12-12 20:27:17,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:27:17,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429938733] [2022-12-12 20:27:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:27:17,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:27:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:27:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:18,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:27:18,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429938733] [2022-12-12 20:27:18,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429938733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:27:18,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094551196] [2022-12-12 20:27:18,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:27:18,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:27:18,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:27:18,173 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:27:18,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 20:27:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:27:18,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-12 20:27:18,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:27:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:18,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:27:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:18,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094551196] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:27:18,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:27:18,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-12 20:27:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115723275] [2022-12-12 20:27:18,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:27:18,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 20:27:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:27:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 20:27:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-12-12 20:27:18,793 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:27:18,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 3201 transitions, 142294 flow. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:18,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:27:18,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:27:18,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:27:28,246 INFO L130 PetriNetUnfolder]: 3457/6924 cut-off events. [2022-12-12 20:27:28,246 INFO L131 PetriNetUnfolder]: For 1601/1601 co-relation queries the response was YES. [2022-12-12 20:27:28,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159882 conditions, 6924 events. 3457/6924 cut-off events. For 1601/1601 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 57930 event pairs, 0 based on Foata normal form. 24/5810 useless extension candidates. Maximal degree in co-relation 104720. Up to 6856 conditions per place. [2022-12-12 20:27:28,300 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 3132 selfloop transitions, 1011 changer transitions 24/4167 dead transitions. [2022-12-12 20:27:28,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 4167 transitions, 193711 flow [2022-12-12 20:27:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-12 20:27:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-12-12 20:27:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 342 transitions. [2022-12-12 20:27:28,303 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38 [2022-12-12 20:27:28,303 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 419 predicate places. [2022-12-12 20:27:28,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 439 places, 4167 transitions, 193711 flow [2022-12-12 20:27:28,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 439 places, 4143 transitions, 192589 flow [2022-12-12 20:27:28,399 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 4143 transitions, 192589 flow [2022-12-12 20:27:28,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:28,399 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:27:28,399 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:27:28,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 20:27:28,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-12 20:27:28,600 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:27:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:27:28,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2139937641, now seen corresponding path program 20 times [2022-12-12 20:27:28,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:27:28,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990390979] [2022-12-12 20:27:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:27:28,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:27:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:27:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:28,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:27:28,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990390979] [2022-12-12 20:27:28,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990390979] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:27:28,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575904104] [2022-12-12 20:27:28,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:27:28,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:27:28,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:27:28,854 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:27:28,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 20:27:28,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:27:28,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:27:28,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 20:27:28,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:27:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:29,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:27:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:29,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575904104] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:27:29,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:27:29,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-12 20:27:29,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738484490] [2022-12-12 20:27:29,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:27:29,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 20:27:29,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:27:29,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 20:27:29,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-12-12 20:27:29,357 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:27:29,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 4143 transitions, 192589 flow. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:29,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:27:29,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:27:29,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:27:32,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-12 20:27:43,532 INFO L130 PetriNetUnfolder]: 3586/7159 cut-off events. [2022-12-12 20:27:43,532 INFO L131 PetriNetUnfolder]: For 1627/1627 co-relation queries the response was YES. [2022-12-12 20:27:43,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172467 conditions, 7159 events. 3586/7159 cut-off events. For 1627/1627 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 60129 event pairs, 0 based on Foata normal form. 4/5997 useless extension candidates. Maximal degree in co-relation 162652. Up to 7091 conditions per place. [2022-12-12 20:27:43,598 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 3470 selfloop transitions, 825 changer transitions 4/4299 dead transitions. [2022-12-12 20:27:43,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 4299 transitions, 208441 flow [2022-12-12 20:27:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-12 20:27:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-12-12 20:27:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 274 transitions. [2022-12-12 20:27:43,601 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30444444444444446 [2022-12-12 20:27:43,601 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 478 predicate places. [2022-12-12 20:27:43,602 INFO L82 GeneralOperation]: Start removeDead. Operand has 498 places, 4299 transitions, 208441 flow [2022-12-12 20:27:43,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 497 places, 4295 transitions, 208249 flow [2022-12-12 20:27:43,720 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 4295 transitions, 208249 flow [2022-12-12 20:27:43,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:43,720 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:27:43,720 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:27:43,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-12 20:27:43,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-12 20:27:43,921 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:27:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:27:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1502556243, now seen corresponding path program 21 times [2022-12-12 20:27:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:27:43,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80398146] [2022-12-12 20:27:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:27:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:27:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:27:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:44,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:27:44,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80398146] [2022-12-12 20:27:44,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80398146] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:27:44,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388060264] [2022-12-12 20:27:44,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:27:44,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:27:44,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:27:44,091 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:27:44,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 20:27:44,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 20:27:44,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:27:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-12 20:27:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:27:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:44,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:27:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:44,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388060264] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:27:44,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:27:44,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-12 20:27:44,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107023501] [2022-12-12 20:27:44,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:27:44,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 20:27:44,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:27:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 20:27:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-12-12 20:27:44,561 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:27:44,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 4295 transitions, 208249 flow. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:44,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:27:44,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:27:44,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:27:58,466 INFO L130 PetriNetUnfolder]: 3743/7426 cut-off events. [2022-12-12 20:27:58,466 INFO L131 PetriNetUnfolder]: For 1657/1657 co-relation queries the response was YES. [2022-12-12 20:27:58,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186318 conditions, 7426 events. 3743/7426 cut-off events. For 1657/1657 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 62447 event pairs, 0 based on Foata normal form. 16/6258 useless extension candidates. Maximal degree in co-relation 176406. Up to 7358 conditions per place. [2022-12-12 20:27:58,579 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 3380 selfloop transitions, 1044 changer transitions 24/4448 dead transitions. [2022-12-12 20:27:58,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 4448 transitions, 224537 flow [2022-12-12 20:27:58,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-12 20:27:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-12 20:27:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 283 transitions. [2022-12-12 20:27:58,581 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3493827160493827 [2022-12-12 20:27:58,581 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 530 predicate places. [2022-12-12 20:27:58,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 550 places, 4448 transitions, 224537 flow [2022-12-12 20:27:58,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 550 places, 4424 transitions, 223319 flow [2022-12-12 20:27:58,737 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 4424 transitions, 223319 flow [2022-12-12 20:27:58,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:58,737 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:27:58,737 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:27:58,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-12 20:27:58,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:27:58,939 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:27:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:27:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1504540461, now seen corresponding path program 22 times [2022-12-12 20:27:58,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:27:58,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641022453] [2022-12-12 20:27:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:27:58,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:27:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:27:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:59,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:27:59,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641022453] [2022-12-12 20:27:59,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641022453] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:27:59,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239532123] [2022-12-12 20:27:59,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:27:59,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:27:59,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:27:59,146 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:27:59,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 20:27:59,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:27:59,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:27:59,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-12 20:27:59,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:27:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:59,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:27:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:27:59,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239532123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:27:59,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:27:59,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-12 20:27:59,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896810582] [2022-12-12 20:27:59,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:27:59,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 20:27:59,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:27:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 20:27:59,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-12-12 20:27:59,722 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:27:59,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 4424 transitions, 223319 flow. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:27:59,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:27:59,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:27:59,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:28:16,043 INFO L130 PetriNetUnfolder]: 4118/8083 cut-off events. [2022-12-12 20:28:16,043 INFO L131 PetriNetUnfolder]: For 1713/1713 co-relation queries the response was YES. [2022-12-12 20:28:16,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210869 conditions, 8083 events. 4118/8083 cut-off events. For 1713/1713 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 68182 event pairs, 0 based on Foata normal form. 36/6865 useless extension candidates. Maximal degree in co-relation 139890. Up to 8015 conditions per place. [2022-12-12 20:28:16,109 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 3747 selfloop transitions, 1012 changer transitions 63/4822 dead transitions. [2022-12-12 20:28:16,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 4822 transitions, 253007 flow [2022-12-12 20:28:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-12 20:28:16,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-12 20:28:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 276 transitions. [2022-12-12 20:28:16,111 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37551020408163266 [2022-12-12 20:28:16,111 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 578 predicate places. [2022-12-12 20:28:16,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 598 places, 4822 transitions, 253007 flow [2022-12-12 20:28:16,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 598 places, 4759 transitions, 249686 flow [2022-12-12 20:28:16,241 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 4759 transitions, 249686 flow [2022-12-12 20:28:16,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:28:16,242 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:28:16,242 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:28:16,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-12 20:28:16,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:28:16,448 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:28:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:28:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash -661319215, now seen corresponding path program 23 times [2022-12-12 20:28:16,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:28:16,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724184326] [2022-12-12 20:28:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:28:16,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:28:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:28:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:28:16,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:28:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724184326] [2022-12-12 20:28:16,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724184326] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:28:16,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115682629] [2022-12-12 20:28:16,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:28:16,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:28:16,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:28:16,650 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:28:16,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 20:28:16,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 20:28:16,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:28:16,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-12 20:28:16,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:28:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:28:16,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:28:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:28:17,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115682629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:28:17,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:28:17,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-12 20:28:17,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836775655] [2022-12-12 20:28:17,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:28:17,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 20:28:17,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:28:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 20:28:17,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-12-12 20:28:17,177 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:28:17,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 4759 transitions, 249686 flow. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:28:17,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:28:17,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:28:17,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:28:36,067 INFO L130 PetriNetUnfolder]: 4785/9474 cut-off events. [2022-12-12 20:28:36,067 INFO L131 PetriNetUnfolder]: For 1957/1957 co-relation queries the response was YES. [2022-12-12 20:28:36,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256662 conditions, 9474 events. 4785/9474 cut-off events. For 1957/1957 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 82925 event pairs, 0 based on Foata normal form. 70/8076 useless extension candidates. Maximal degree in co-relation 245028. Up to 9406 conditions per place. [2022-12-12 20:28:36,150 INFO L137 encePairwiseOnDemand]: 6/15 looper letters, 4100 selfloop transitions, 1372 changer transitions 203/5675 dead transitions. [2022-12-12 20:28:36,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 5675 transitions, 309169 flow [2022-12-12 20:28:36,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-12 20:28:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-12 20:28:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 283 transitions. [2022-12-12 20:28:36,152 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37733333333333335 [2022-12-12 20:28:36,152 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 627 predicate places. [2022-12-12 20:28:36,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 647 places, 5675 transitions, 309169 flow [2022-12-12 20:28:36,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 647 places, 5472 transitions, 298045 flow [2022-12-12 20:28:36,324 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 5472 transitions, 298045 flow [2022-12-12 20:28:36,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:28:36,324 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:28:36,324 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:28:36,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 20:28:36,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-12 20:28:36,525 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:28:36,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:28:36,525 INFO L85 PathProgramCache]: Analyzing trace with hash -574082191, now seen corresponding path program 24 times [2022-12-12 20:28:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:28:36,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130198793] [2022-12-12 20:28:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:28:36,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:28:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:28:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:28:36,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:28:36,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130198793] [2022-12-12 20:28:36,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130198793] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:28:36,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333068737] [2022-12-12 20:28:36,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:28:36,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:28:36,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:28:36,704 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:28:36,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 20:28:36,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 20:28:36,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:28:36,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 20:28:36,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:28:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:28:36,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:28:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:28:37,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333068737] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:28:37,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:28:37,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-12 20:28:37,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553058473] [2022-12-12 20:28:37,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:28:37,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 20:28:37,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:28:37,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 20:28:37,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-12-12 20:28:37,202 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:28:37,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 5472 transitions, 298045 flow. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:28:37,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:28:37,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:28:37,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:29:00,898 INFO L130 PetriNetUnfolder]: 5757/11458 cut-off events. [2022-12-12 20:29:00,899 INFO L131 PetriNetUnfolder]: For 2340/2340 co-relation queries the response was YES. [2022-12-12 20:29:00,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321894 conditions, 11458 events. 5757/11458 cut-off events. For 2340/2340 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 103015 event pairs, 0 based on Foata normal form. 38/9676 useless extension candidates. Maximal degree in co-relation 211052. Up to 11390 conditions per place. [2022-12-12 20:29:00,998 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 5271 selfloop transitions, 1561 changer transitions 38/6870 dead transitions. [2022-12-12 20:29:00,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 6870 transitions, 388054 flow [2022-12-12 20:29:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-12 20:29:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-12 20:29:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 269 transitions. [2022-12-12 20:29:01,000 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3586666666666667 [2022-12-12 20:29:01,000 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 675 predicate places. [2022-12-12 20:29:01,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 695 places, 6870 transitions, 388054 flow [2022-12-12 20:29:01,209 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 694 places, 6832 transitions, 385926 flow [2022-12-12 20:29:01,210 INFO L495 AbstractCegarLoop]: Abstraction has has 694 places, 6832 transitions, 385926 flow [2022-12-12 20:29:01,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:29:01,210 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:29:01,210 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:29:01,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-12 20:29:01,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-12 20:29:01,410 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:29:01,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:29:01,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1990422259, now seen corresponding path program 25 times [2022-12-12 20:29:01,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:29:01,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194353503] [2022-12-12 20:29:01,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:29:01,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:29:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:29:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:29:01,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:29:01,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194353503] [2022-12-12 20:29:01,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194353503] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:29:01,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739556570] [2022-12-12 20:29:01,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:29:01,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:29:01,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:29:01,866 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:29:01,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 20:29:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:29:01,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 20:29:01,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:29:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:29:02,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:29:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:29:02,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739556570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:29:02,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:29:02,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2022-12-12 20:29:02,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214589443] [2022-12-12 20:29:02,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:29:02,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 20:29:02,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:29:02,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 20:29:02,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-12-12 20:29:02,686 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:29:02,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 6832 transitions, 385926 flow. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:29:02,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:29:02,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:29:02,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:29:52,233 INFO L130 PetriNetUnfolder]: 6980/14089 cut-off events. [2022-12-12 20:29:52,233 INFO L131 PetriNetUnfolder]: For 2915/2915 co-relation queries the response was YES. [2022-12-12 20:29:52,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409977 conditions, 14089 events. 6980/14089 cut-off events. For 2915/2915 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 131947 event pairs, 0 based on Foata normal form. 44/11871 useless extension candidates. Maximal degree in co-relation 264093. Up to 14021 conditions per place. [2022-12-12 20:29:52,372 INFO L137 encePairwiseOnDemand]: 6/15 looper letters, 6771 selfloop transitions, 1669 changer transitions 54/8494 dead transitions. [2022-12-12 20:29:52,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 8494 transitions, 496961 flow [2022-12-12 20:29:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-12 20:29:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-12 20:29:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 233 transitions. [2022-12-12 20:29:52,373 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3451851851851852 [2022-12-12 20:29:52,373 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 715 predicate places. [2022-12-12 20:29:52,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 735 places, 8494 transitions, 496961 flow [2022-12-12 20:29:52,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 735 places, 8440 transitions, 493790 flow [2022-12-12 20:29:52,671 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 8440 transitions, 493790 flow [2022-12-12 20:29:52,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:29:52,671 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:29:52,671 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:29:52,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 20:29:52,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-12 20:29:52,872 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:29:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:29:52,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1859680891, now seen corresponding path program 26 times [2022-12-12 20:29:52,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:29:52,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148233858] [2022-12-12 20:29:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:29:52,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:29:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:29:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:29:53,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:29:53,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148233858] [2022-12-12 20:29:53,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148233858] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:29:53,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612256287] [2022-12-12 20:29:53,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:29:53,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:29:53,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:29:53,028 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:29:53,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-12 20:29:53,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:29:53,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:29:53,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 20:29:53,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:29:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:29:53,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:29:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:29:53,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612256287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:29:53,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:29:53,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-12 20:29:53,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071264467] [2022-12-12 20:29:53,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:29:53,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:29:53,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:29:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:29:53,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:29:53,425 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:29:53,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 8440 transitions, 493790 flow. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:29:53,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:29:53,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:29:53,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:30:55,213 INFO L130 PetriNetUnfolder]: 7287/14669 cut-off events. [2022-12-12 20:30:55,213 INFO L131 PetriNetUnfolder]: For 3051/3051 co-relation queries the response was YES. [2022-12-12 20:30:55,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441531 conditions, 14669 events. 7287/14669 cut-off events. For 3051/3051 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 138163 event pairs, 0 based on Foata normal form. 9/12342 useless extension candidates. Maximal degree in co-relation 419930. Up to 14601 conditions per place. [2022-12-12 20:30:55,358 INFO L137 encePairwiseOnDemand]: 6/15 looper letters, 8401 selfloop transitions, 369 changer transitions 47/8817 dead transitions. [2022-12-12 20:30:55,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 8817 transitions, 533521 flow [2022-12-12 20:30:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-12 20:30:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-12 20:30:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 236 transitions. [2022-12-12 20:30:55,360 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3746031746031746 [2022-12-12 20:30:55,360 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 755 predicate places. [2022-12-12 20:30:55,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 775 places, 8817 transitions, 533521 flow [2022-12-12 20:30:55,667 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 775 places, 8770 transitions, 530647 flow [2022-12-12 20:30:55,667 INFO L495 AbstractCegarLoop]: Abstraction has has 775 places, 8770 transitions, 530647 flow [2022-12-12 20:30:55,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:55,667 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:30:55,667 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:30:55,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-12 20:30:55,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-12 20:30:55,868 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:30:55,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:30:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash 2029338235, now seen corresponding path program 27 times [2022-12-12 20:30:55,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:30:55,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369725486] [2022-12-12 20:30:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:30:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:30:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:30:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:30:56,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:30:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369725486] [2022-12-12 20:30:56,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369725486] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:30:56,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952237979] [2022-12-12 20:30:56,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:30:56,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:30:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:30:56,080 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:30:56,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-12 20:30:56,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-12 20:30:56,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:30:56,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-12 20:30:56,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:30:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:30:56,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:30:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:30:56,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952237979] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:30:56,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:30:56,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-12 20:30:56,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879099491] [2022-12-12 20:30:56,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:30:56,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 20:30:56,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:30:56,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 20:30:56,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-12-12 20:30:56,698 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:30:56,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 775 places, 8770 transitions, 530647 flow. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:30:56,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:30:56,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:30:56,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:32:11,854 INFO L130 PetriNetUnfolder]: 7820/15857 cut-off events. [2022-12-12 20:32:11,854 INFO L131 PetriNetUnfolder]: For 3249/3249 co-relation queries the response was YES. [2022-12-12 20:32:11,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493167 conditions, 15857 events. 7820/15857 cut-off events. For 3249/3249 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 152246 event pairs, 0 based on Foata normal form. 20/13341 useless extension candidates. Maximal degree in co-relation 315977. Up to 15789 conditions per place. [2022-12-12 20:32:12,017 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 7785 selfloop transitions, 1767 changer transitions 20/9572 dead transitions. [2022-12-12 20:32:12,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 9572 transitions, 598379 flow [2022-12-12 20:32:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 20:32:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 20:32:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 190 transitions. [2022-12-12 20:32:12,019 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2022-12-12 20:32:12,019 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 784 predicate places. [2022-12-12 20:32:12,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 804 places, 9572 transitions, 598379 flow [2022-12-12 20:32:12,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 804 places, 9552 transitions, 597124 flow [2022-12-12 20:32:12,372 INFO L495 AbstractCegarLoop]: Abstraction has has 804 places, 9552 transitions, 597124 flow [2022-12-12 20:32:12,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:32:12,372 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:32:12,372 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:32:12,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-12 20:32:12,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:32:12,574 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:32:12,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:32:12,574 INFO L85 PathProgramCache]: Analyzing trace with hash 340999297, now seen corresponding path program 28 times [2022-12-12 20:32:12,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:32:12,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690184945] [2022-12-12 20:32:12,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:32:12,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:32:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:32:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:32:12,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:32:12,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690184945] [2022-12-12 20:32:12,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690184945] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:32:12,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703437887] [2022-12-12 20:32:12,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:32:12,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:32:12,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:32:12,746 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:32:12,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-12 20:32:12,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:32:12,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:32:12,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 20:32:12,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:32:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:32:13,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:32:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:32:13,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703437887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:32:13,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:32:13,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-12 20:32:13,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50667333] [2022-12-12 20:32:13,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:32:13,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 20:32:13,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:32:13,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 20:32:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-12-12 20:32:13,297 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:32:13,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 9552 transitions, 597124 flow. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:32:13,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:32:13,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:32:13,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:33:42,530 INFO L130 PetriNetUnfolder]: 8237/16804 cut-off events. [2022-12-12 20:33:42,530 INFO L131 PetriNetUnfolder]: For 3535/3535 co-relation queries the response was YES. [2022-12-12 20:33:42,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539459 conditions, 16804 events. 8237/16804 cut-off events. For 3535/3535 co-relation queries the response was YES. Maximal size of possible extension queue 1344. Compared 164555 event pairs, 0 based on Foata normal form. 18/14106 useless extension candidates. Maximal degree in co-relation 511535. Up to 16736 conditions per place. [2022-12-12 20:33:42,710 INFO L137 encePairwiseOnDemand]: 7/15 looper letters, 8738 selfloop transitions, 1392 changer transitions 18/10148 dead transitions. [2022-12-12 20:33:42,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 845 places, 10148 transitions, 654777 flow [2022-12-12 20:33:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-12 20:33:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-12 20:33:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 189 transitions. [2022-12-12 20:33:42,711 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3 [2022-12-12 20:33:42,711 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 825 predicate places. [2022-12-12 20:33:42,712 INFO L82 GeneralOperation]: Start removeDead. Operand has 845 places, 10148 transitions, 654777 flow [2022-12-12 20:33:43,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 844 places, 10130 transitions, 653625 flow [2022-12-12 20:33:43,139 INFO L495 AbstractCegarLoop]: Abstraction has has 844 places, 10130 transitions, 653625 flow [2022-12-12 20:33:43,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:33:43,139 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:33:43,139 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:33:43,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-12 20:33:43,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:33:43,344 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:33:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:33:43,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1829265985, now seen corresponding path program 29 times [2022-12-12 20:33:43,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:33:43,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583073049] [2022-12-12 20:33:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:33:43,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:33:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:33:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:33:43,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:33:43,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583073049] [2022-12-12 20:33:43,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583073049] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:33:43,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762464787] [2022-12-12 20:33:43,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:33:43,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:33:43,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:33:43,553 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:33:43,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-12 20:33:43,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 20:33:43,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:33:43,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-12 20:33:43,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:33:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:33:43,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:33:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:33:44,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762464787] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:33:44,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:33:44,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-12 20:33:44,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851856938] [2022-12-12 20:33:44,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:33:44,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 20:33:44,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:33:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 20:33:44,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-12-12 20:33:44,004 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:33:44,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 10130 transitions, 653625 flow. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:33:44,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:33:44,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:33:44,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:35:19,602 INFO L130 PetriNetUnfolder]: 8815/17946 cut-off events. [2022-12-12 20:35:19,602 INFO L131 PetriNetUnfolder]: For 3719/3719 co-relation queries the response was YES. [2022-12-12 20:35:19,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594074 conditions, 17946 events. 8815/17946 cut-off events. For 3719/3719 co-relation queries the response was YES. Maximal size of possible extension queue 1444. Compared 177422 event pairs, 0 based on Foata normal form. 48/15082 useless extension candidates. Maximal degree in co-relation 564276. Up to 17878 conditions per place. [2022-12-12 20:35:19,786 INFO L137 encePairwiseOnDemand]: 6/15 looper letters, 9999 selfloop transitions, 605 changer transitions 230/10834 dead transitions. [2022-12-12 20:35:19,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 10834 transitions, 720721 flow [2022-12-12 20:35:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-12 20:35:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-12 20:35:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 222 transitions. [2022-12-12 20:35:19,787 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37 [2022-12-12 20:35:19,787 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 863 predicate places. [2022-12-12 20:35:19,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 883 places, 10834 transitions, 720721 flow [2022-12-12 20:35:20,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 881 places, 10604 transitions, 705352 flow [2022-12-12 20:35:20,201 INFO L495 AbstractCegarLoop]: Abstraction has has 881 places, 10604 transitions, 705352 flow [2022-12-12 20:35:20,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:35:20,202 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:35:20,202 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:35:20,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-12 20:35:20,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-12 20:35:20,402 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:35:20,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:35:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1070788387, now seen corresponding path program 30 times [2022-12-12 20:35:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:35:20,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90533578] [2022-12-12 20:35:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:35:20,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:35:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:35:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:35:20,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:35:20,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90533578] [2022-12-12 20:35:20,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90533578] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:35:20,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930196035] [2022-12-12 20:35:20,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:35:20,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:35:20,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:35:20,778 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:35:20,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-12 20:35:20,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 20:35:20,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:35:20,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-12 20:35:20,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:35:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:35:22,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:35:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:35:23,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930196035] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:35:23,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:35:23,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2022-12-12 20:35:23,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535204972] [2022-12-12 20:35:23,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:35:23,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 20:35:23,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:35:23,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 20:35:23,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-12-12 20:35:23,233 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 20:35:23,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 10604 transitions, 705352 flow. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:35:23,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:35:23,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 20:35:23,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:38:00,799 INFO L130 PetriNetUnfolder]: 11961/24462 cut-off events. [2022-12-12 20:38:00,799 INFO L131 PetriNetUnfolder]: For 5352/5352 co-relation queries the response was YES. [2022-12-12 20:38:00,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834380 conditions, 24462 events. 11961/24462 cut-off events. For 5352/5352 co-relation queries the response was YES. Maximal size of possible extension queue 1871. Compared 252807 event pairs, 0 based on Foata normal form. 116/20198 useless extension candidates. Maximal degree in co-relation 517608. Up to 24394 conditions per place. [2022-12-12 20:38:01,058 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 11277 selfloop transitions, 1974 changer transitions 1484/14738 dead transitions. [2022-12-12 20:38:01,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 902 places, 14738 transitions, 1010327 flow [2022-12-12 20:38:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 20:38:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 20:38:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 162 transitions. [2022-12-12 20:38:01,060 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2022-12-12 20:38:01,060 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 882 predicate places. [2022-12-12 20:38:01,060 INFO L82 GeneralOperation]: Start removeDead. Operand has 902 places, 14738 transitions, 1010327 flow [2022-12-12 20:38:01,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 871 places, 13254 transitions, 908169 flow [2022-12-12 20:38:01,650 INFO L495 AbstractCegarLoop]: Abstraction has has 871 places, 13254 transitions, 908169 flow [2022-12-12 20:38:01,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:38:01,650 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:38:01,650 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:38:01,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-12 20:38:01,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:38:01,855 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:38:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:38:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1223385227, now seen corresponding path program 31 times [2022-12-12 20:38:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:38:01,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601380218] [2022-12-12 20:38:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:38:01,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:38:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:38:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:38:01,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:38:01,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601380218] [2022-12-12 20:38:01,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601380218] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:38:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595646918] [2022-12-12 20:38:01,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:38:01,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:38:01,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:38:01,988 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:38:01,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-12 20:38:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:38:02,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 20:38:02,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:38:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:38:02,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:38:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:38:02,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595646918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:38:02,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:38:02,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-12-12 20:38:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357659562] [2022-12-12 20:38:02,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:38:02,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 20:38:02,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:38:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 20:38:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-12-12 20:38:02,607 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 20:38:02,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 871 places, 13254 transitions, 908169 flow. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:38:02,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:38:02,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 20:38:02,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 20:40:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 20:40:23,926 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 20:40:23,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-12 20:40:23,934 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 20:40:23,934 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 [2022-12-12 20:40:24,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:40:24,127 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 0/15 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 637760 conditions, 18179 events (9464/18178 cut-off events. For 3706/3706 co-relation queries the response was YES. Maximal size of possible extension queue 1736. Compared 181337 event pairs, 0 based on Foata normal form. 22/16087 useless extension candidates. Maximal degree in co-relation 632276. Up to 18118 conditions per place.). [2022-12-12 20:40:24,129 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 20:40:24,129 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 20:40:24,129 INFO L445 BasicCegarLoop]: Path program histogram: [31, 2, 1] [2022-12-12 20:40:24,131 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 20:40:24,131 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 20:40:24,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 08:40:24 BasicIcfg [2022-12-12 20:40:24,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 20:40:24,133 INFO L158 Benchmark]: Toolchain (without parser) took 852399.63ms. Allocated memory was 202.4MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 178.2MB in the beginning and 1.2GB in the end (delta: -997.6MB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2022-12-12 20:40:24,133 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 202.4MB. Free memory is still 178.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 20:40:24,133 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.71ms. Allocated memory is still 202.4MB. Free memory was 177.8MB in the beginning and 166.7MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 20:40:24,134 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.97ms. Allocated memory is still 202.4MB. Free memory was 166.7MB in the beginning and 165.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 20:40:24,134 INFO L158 Benchmark]: Boogie Preprocessor took 33.97ms. Allocated memory is still 202.4MB. Free memory was 165.1MB in the beginning and 163.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 20:40:24,134 INFO L158 Benchmark]: RCFGBuilder took 333.54ms. Allocated memory is still 202.4MB. Free memory was 163.5MB in the beginning and 149.4MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-12-12 20:40:24,134 INFO L158 Benchmark]: TraceAbstraction took 851828.32ms. Allocated memory was 202.4MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 148.3MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 2.5GB. Max. memory is 8.0GB. [2022-12-12 20:40:24,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 202.4MB. Free memory is still 178.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.71ms. Allocated memory is still 202.4MB. Free memory was 177.8MB in the beginning and 166.7MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.97ms. Allocated memory is still 202.4MB. Free memory was 166.7MB in the beginning and 165.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.97ms. Allocated memory is still 202.4MB. Free memory was 165.1MB in the beginning and 163.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 333.54ms. Allocated memory is still 202.4MB. Free memory was 163.5MB in the beginning and 149.4MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 851828.32ms. Allocated memory was 202.4MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 148.3MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 2.5GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 68 PlacesBefore, 20 PlacesAfterwards, 67 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 32 TrivialYvCompositions, 16 ConcurrentYvCompositions, 4 ChoiceCompositions, 52 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 191, independent: 189, independent conditional: 189, independent unconditional: 0, dependent: 2, dependent conditional: 2, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 191, independent: 189, independent conditional: 0, independent unconditional: 189, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 191, independent: 189, independent conditional: 0, independent unconditional: 189, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 191, independent: 189, independent conditional: 0, independent unconditional: 189, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 191, independent: 189, independent conditional: 0, independent unconditional: 189, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 191, independent: 189, independent conditional: 0, independent unconditional: 189, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 22, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 191, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 191, unknown conditional: 0, unknown unconditional: 191] , Statistics on independence cache: Total cache size (in pairs): 293, Positive cache size: 291, Positive conditional cache size: 0, Positive unconditional cache size: 291, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 0/15 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 637760 conditions, 18179 events (9464/18178 cut-off events. For 3706/3706 co-relation queries the response was YES. Maximal size of possible extension queue 1736. Compared 181337 event pairs, 0 based on Foata normal form. 22/16087 useless extension candidates. Maximal degree in co-relation 632276. Up to 18118 conditions per place.). - TimeoutResultAtElement [Line: 73]: 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 (18states, 0/15 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 637760 conditions, 18179 events (9464/18178 cut-off events. For 3706/3706 co-relation queries the response was YES. Maximal size of possible extension queue 1736. Compared 181337 event pairs, 0 based on Foata normal form. 22/16087 useless extension candidates. Maximal degree in co-relation 632276. Up to 18118 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 0/15 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 637760 conditions, 18179 events (9464/18178 cut-off events. For 3706/3706 co-relation queries the response was YES. Maximal size of possible extension queue 1736. Compared 181337 event pairs, 0 based on Foata normal form. 22/16087 useless extension candidates. Maximal degree in co-relation 632276. Up to 18118 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 89 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 3.7s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 851.7s, OverallIterations: 34, TraceHistogramMax: 3, PathProgramHistogramMax: 31, EmptinessCheckTime: 0.0s, AutomataDifference: 808.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5329 SdHoareTripleChecker+Valid, 28.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5329 mSDsluCounter, 569 SdHoareTripleChecker+Invalid, 26.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 411 mSDsCounter, 1327 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17906 IncrementalHoareTripleChecker+Invalid, 19233 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1327 mSolverCounterUnsat, 158 mSDtfsCounter, 17906 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2280 GetRequests, 1072 SyntacticMatches, 46 SemanticMatches, 1162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15045 ImplicationChecksByTransitivity, 62.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=908169occurred in iteration=33, InterpolantAutomatonStates: 942, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 33 MinimizatonAttempts, 157198 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 27.8s InterpolantComputationTime, 1119 NumberOfCodeBlocks, 1118 NumberOfCodeBlocksAsserted, 104 NumberOfCheckSat, 1554 ConstructedInterpolants, 0 QuantifiedInterpolants, 15169 SizeOfPredicates, 252 NumberOfNonLiveVariables, 3971 ConjunctsInSsa, 457 ConjunctsInUnsatCore, 97 InterpolantComputations, 3 PerfectInterpolantSequences, 127/642 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