/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 11:40:12,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 11:40:12,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 11:40:12,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 11:40:12,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 11:40:12,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 11:40:12,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 11:40:12,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 11:40:12,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 11:40:12,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 11:40:12,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 11:40:12,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 11:40:12,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 11:40:12,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 11:40:12,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 11:40:12,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 11:40:12,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 11:40:12,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 11:40:12,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 11:40:12,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 11:40:12,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 11:40:12,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 11:40:12,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 11:40:12,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 11:40:12,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 11:40:12,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 11:40:12,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 11:40:12,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 11:40:12,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 11:40:12,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 11:40:12,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 11:40:12,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 11:40:12,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 11:40:12,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 11:40:12,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 11:40:12,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 11:40:12,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 11:40:12,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 11:40:12,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 11:40:12,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 11:40:12,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 11:40:12,298 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-VariableLbe.epf [2023-01-28 11:40:12,325 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 11:40:12,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 11:40:12,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 11:40:12,326 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 11:40:12,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 11:40:12,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 11:40:12,327 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 11:40:12,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 11:40:12,327 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 11:40:12,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 11:40:12,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 11:40:12,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 11:40:12,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 11:40:12,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 11:40:12,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 11:40:12,328 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 11:40:12,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 11:40:12,328 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 11:40:12,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 11:40:12,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 11:40:12,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 11:40:12,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 11:40:12,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 11:40:12,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:40:12,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 11:40:12,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 11:40:12,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 11:40:12,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 11:40:12,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 11:40:12,330 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 11:40:12,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 11:40:12,330 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 11:40:12,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 11:40:12,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 11:40:12,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 11:40:12,498 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 11:40:12,499 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 11:40:12,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-01-28 11:40:13,877 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 11:40:14,016 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 11:40:14,016 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-01-28 11:40:14,021 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebb1095eb/725ac1cbcebb44988427a8f843935e83/FLAGa1d5d58cf [2023-01-28 11:40:14,030 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebb1095eb/725ac1cbcebb44988427a8f843935e83 [2023-01-28 11:40:14,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 11:40:14,033 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 11:40:14,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 11:40:14,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 11:40:14,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 11:40:14,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7012dc54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14, skipping insertion in model container [2023-01-28 11:40:14,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 11:40:14,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 11:40:14,150 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-01-28 11:40:14,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:40:14,161 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 11:40:14,174 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2023-01-28 11:40:14,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:40:14,184 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:40:14,185 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:40:14,189 INFO L208 MainTranslator]: Completed translation [2023-01-28 11:40:14,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14 WrapperNode [2023-01-28 11:40:14,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 11:40:14,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 11:40:14,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 11:40:14,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 11:40:14,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,214 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 147 [2023-01-28 11:40:14,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 11:40:14,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 11:40:14,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 11:40:14,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 11:40:14,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,230 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 11:40:14,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 11:40:14,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 11:40:14,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 11:40:14,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (1/1) ... [2023-01-28 11:40:14,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:40:14,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:14,257 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) [2023-01-28 11:40:14,259 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 [2023-01-28 11:40:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 11:40:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 11:40:14,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 11:40:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 11:40:14,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 11:40:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 11:40:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 11:40:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 11:40:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 11:40:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 11:40:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 11:40:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 11:40:14,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 11:40:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 11:40:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 11:40:14,288 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 11:40:14,412 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 11:40:14,413 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 11:40:14,666 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 11:40:14,719 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 11:40:14,720 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 11:40:14,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:40:14 BoogieIcfgContainer [2023-01-28 11:40:14,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 11:40:14,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 11:40:14,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 11:40:14,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 11:40:14,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 11:40:14" (1/3) ... [2023-01-28 11:40:14,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359d5211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:40:14, skipping insertion in model container [2023-01-28 11:40:14,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:40:14" (2/3) ... [2023-01-28 11:40:14,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359d5211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:40:14, skipping insertion in model container [2023-01-28 11:40:14,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:40:14" (3/3) ... [2023-01-28 11:40:14,727 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-01-28 11:40:14,745 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 11:40:14,745 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 11:40:14,745 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 11:40:14,833 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 11:40:14,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 127 transitions, 270 flow [2023-01-28 11:40:14,929 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2023-01-28 11:40:14,929 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:40:14,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-28 11:40:14,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 127 transitions, 270 flow [2023-01-28 11:40:14,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 117 transitions, 246 flow [2023-01-28 11:40:14,941 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 11:40:14,947 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 117 transitions, 246 flow [2023-01-28 11:40:14,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 117 transitions, 246 flow [2023-01-28 11:40:14,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 117 transitions, 246 flow [2023-01-28 11:40:14,965 INFO L130 PetriNetUnfolder]: 11/117 cut-off events. [2023-01-28 11:40:14,965 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:40:14,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 11/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-28 11:40:14,967 INFO L119 LiptonReduction]: Number of co-enabled transitions 792 [2023-01-28 11:40:18,319 INFO L134 LiptonReduction]: Checked pairs total: 883 [2023-01-28 11:40:18,319 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-01-28 11:40:18,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 11:40:18,347 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;@62c176fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 11:40:18,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 11:40:18,357 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-01-28 11:40:18,357 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:40:18,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:18,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:18,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:18,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash -238231372, now seen corresponding path program 1 times [2023-01-28 11:40:18,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:18,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623658487] [2023-01-28 11:40:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:18,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:18,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:18,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623658487] [2023-01-28 11:40:18,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623658487] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:40:18,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:40:18,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 11:40:18,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793688940] [2023-01-28 11:40:18,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:40:18,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 11:40:18,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:18,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 11:40:18,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 11:40:18,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 257 [2023-01-28 11:40:18,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:18,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:18,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 257 [2023-01-28 11:40:18,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:18,815 INFO L130 PetriNetUnfolder]: 64/113 cut-off events. [2023-01-28 11:40:18,816 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-01-28 11:40:18,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 332 event pairs, 13 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2023-01-28 11:40:18,819 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2023-01-28 11:40:18,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2023-01-28 11:40:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 11:40:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 11:40:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-01-28 11:40:18,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46173800259403375 [2023-01-28 11:40:18,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-01-28 11:40:18,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-01-28 11:40:18,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:18,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-01-28 11:40:18,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:18,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:18,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:18,853 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 356 transitions. [2023-01-28 11:40:18,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2023-01-28 11:40:18,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 11:40:18,856 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2023-01-28 11:40:18,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-01-28 11:40:18,860 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-01-28 11:40:18,860 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2023-01-28 11:40:18,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:18,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:18,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:18,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 11:40:18,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:18,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:18,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1359864469, now seen corresponding path program 1 times [2023-01-28 11:40:18,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:18,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740423273] [2023-01-28 11:40:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:18,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:19,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:19,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740423273] [2023-01-28 11:40:19,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740423273] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:40:19,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:40:19,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 11:40:19,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192056815] [2023-01-28 11:40:19,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:40:19,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 11:40:19,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:19,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 11:40:19,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 11:40:19,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 257 [2023-01-28 11:40:19,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:19,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:19,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 257 [2023-01-28 11:40:19,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:19,067 INFO L130 PetriNetUnfolder]: 48/96 cut-off events. [2023-01-28 11:40:19,067 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-01-28 11:40:19,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 230 event pairs, 15 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2023-01-28 11:40:19,068 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2023-01-28 11:40:19,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2023-01-28 11:40:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 11:40:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 11:40:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-01-28 11:40:19,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345006485084306 [2023-01-28 11:40:19,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-01-28 11:40:19,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-01-28 11:40:19,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:19,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-01-28 11:40:19,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:19,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:19,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:19,073 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 335 transitions. [2023-01-28 11:40:19,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2023-01-28 11:40:19,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 11:40:19,074 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2023-01-28 11:40:19,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-01-28 11:40:19,075 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-01-28 11:40:19,075 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2023-01-28 11:40:19,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:19,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:19,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:19,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 11:40:19,076 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:19,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash 210856546, now seen corresponding path program 1 times [2023-01-28 11:40:19,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:19,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767424043] [2023-01-28 11:40:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:19,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:40:19,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:19,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767424043] [2023-01-28 11:40:19,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767424043] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:40:19,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:40:19,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 11:40:19,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596250317] [2023-01-28 11:40:19,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:40:19,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:40:19,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:40:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:40:19,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 257 [2023-01-28 11:40:19,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:19,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:19,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 257 [2023-01-28 11:40:19,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:19,243 INFO L130 PetriNetUnfolder]: 57/126 cut-off events. [2023-01-28 11:40:19,244 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-01-28 11:40:19,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 400 event pairs, 40 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2023-01-28 11:40:19,245 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-01-28 11:40:19,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2023-01-28 11:40:19,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:40:19,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:40:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-01-28 11:40:19,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036964980544747 [2023-01-28 11:40:19,246 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-01-28 11:40:19,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-01-28 11:40:19,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:19,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-01-28 11:40:19,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:19,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:19,250 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:19,250 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 415 transitions. [2023-01-28 11:40:19,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2023-01-28 11:40:19,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 11:40:19,251 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2023-01-28 11:40:19,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-01-28 11:40:19,252 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-28 11:40:19,255 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2023-01-28 11:40:19,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:19,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:19,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:19,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 11:40:19,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:19,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:19,256 INFO L85 PathProgramCache]: Analyzing trace with hash -961979074, now seen corresponding path program 1 times [2023-01-28 11:40:19,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:19,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887041385] [2023-01-28 11:40:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:19,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:19,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:19,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887041385] [2023-01-28 11:40:19,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887041385] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:19,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558166986] [2023-01-28 11:40:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:19,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:19,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:19,951 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) [2023-01-28 11:40:20,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 11:40:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:20,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 11:40:20,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:20,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:40:20,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:40:20,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:40:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:20,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:20,738 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~back~0) (let ((.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ c_~sum~0 (select .cse0 .cse1)) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse3 .cse2) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse1)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-01-28 11:40:20,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:20,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-01-28 11:40:20,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:20,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 292 [2023-01-28 11:40:20,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:20,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 92 [2023-01-28 11:40:20,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:20,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 79 [2023-01-28 11:40:20,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:20,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-01-28 11:40:20,996 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 11:40:20,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 136 [2023-01-28 11:40:21,008 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 11:40:21,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 112 [2023-01-28 11:40:21,019 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 11:40:21,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2023-01-28 11:40:21,062 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 11:40:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-01-28 11:40:21,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558166986] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:21,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:21,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-01-28 11:40:21,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844907062] [2023-01-28 11:40:21,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:21,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 11:40:21,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:21,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 11:40:21,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=4, NotChecked=36, Total=420 [2023-01-28 11:40:21,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 11:40:21,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:21,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:21,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 11:40:21,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:21,233 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse12 (* c_~front~0 4)) (.cse13 (* c_~back~0 4))) (let ((.cse5 (+ c_~queue~0.offset .cse13)) (.cse3 (+ c_~queue~0.offset .cse12)) (.cse0 (<= c_~n~0 c_~back~0)) (.cse4 (< c_~back~0 0))) (and (let ((.cse2 (select |c_#memory_int| c_~queue~0.base))) (or .cse0 (let ((.cse1 (+ c_~sum~0 (select .cse2 .cse3)))) (and (<= .cse1 1) (<= 0 .cse1))) .cse4 (not (= (select .cse2 .cse5) 1)))) (or .cse0 .cse4 (and (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base))) (or (not (= (select .cse6 .cse5) 1)) (<= (+ c_~sum~0 (select .cse6 .cse3)) 1)))) (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base))) (or (not (= (select .cse7 .cse5) 1)) (<= 0 (+ c_~sum~0 (select .cse7 .cse3)))))))) (<= 0 c_~sum~0) (<= c_~sum~0 1) (or (< (+ |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse0 (and (<= c_~sum~0 0) (<= 0 (+ c_~sum~0 1)) (= c_~back~0 c_~front~0)) .cse4) (or .cse0 (let ((.cse10 (+ .cse13 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse9 (+ .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse8 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ c_~sum~0 (select .cse8 .cse9)) 1) (not (= (select .cse8 .cse10) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse11 .cse10) 1)) (<= 0 (+ c_~sum~0 (select .cse11 .cse9)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse4)))) is different from false [2023-01-28 11:40:21,744 INFO L130 PetriNetUnfolder]: 151/307 cut-off events. [2023-01-28 11:40:21,744 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2023-01-28 11:40:21,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 307 events. 151/307 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1194 event pairs, 30 based on Foata normal form. 12/315 useless extension candidates. Maximal degree in co-relation 726. Up to 111 conditions per place. [2023-01-28 11:40:21,745 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 27 selfloop transitions, 12 changer transitions 47/86 dead transitions. [2023-01-28 11:40:21,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 86 transitions, 430 flow [2023-01-28 11:40:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 11:40:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 11:40:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1138 transitions. [2023-01-28 11:40:21,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.295201037613489 [2023-01-28 11:40:21,763 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1138 transitions. [2023-01-28 11:40:21,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1138 transitions. [2023-01-28 11:40:21,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:21,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1138 transitions. [2023-01-28 11:40:21,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 75.86666666666666) internal successors, (1138), 15 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:21,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:21,771 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:21,771 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 15 states and 1138 transitions. [2023-01-28 11:40:21,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 86 transitions, 430 flow [2023-01-28 11:40:21,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 86 transitions, 420 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 11:40:21,773 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 165 flow [2023-01-28 11:40:21,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=165, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-01-28 11:40:21,774 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-01-28 11:40:21,774 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 165 flow [2023-01-28 11:40:21,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:21,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:21,775 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:21,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 11:40:21,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:21,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:21,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:21,981 INFO L85 PathProgramCache]: Analyzing trace with hash -438286575, now seen corresponding path program 2 times [2023-01-28 11:40:21,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:21,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529103619] [2023-01-28 11:40:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:21,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:40:22,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:22,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529103619] [2023-01-28 11:40:22,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529103619] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:22,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271673448] [2023-01-28 11:40:22,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:40:22,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:22,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:22,103 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) [2023-01-28 11:40:22,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 11:40:22,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:40:22,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:22,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:40:22,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:22,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 86 [2023-01-28 11:40:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:40:22,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:22,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 96 [2023-01-28 11:40:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:40:22,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271673448] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:22,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:22,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2023-01-28 11:40:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406415583] [2023-01-28 11:40:22,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:22,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 11:40:22,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:22,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 11:40:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-01-28 11:40:22,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2023-01-28 11:40:22,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 165 flow. Second operand has 7 states, 7 states have (on average 110.85714285714286) internal successors, (776), 7 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:22,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:22,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2023-01-28 11:40:22,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:22,459 INFO L130 PetriNetUnfolder]: 184/362 cut-off events. [2023-01-28 11:40:22,459 INFO L131 PetriNetUnfolder]: For 358/362 co-relation queries the response was YES. [2023-01-28 11:40:22,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 362 events. 184/362 cut-off events. For 358/362 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1481 event pairs, 46 based on Foata normal form. 12/369 useless extension candidates. Maximal degree in co-relation 834. Up to 142 conditions per place. [2023-01-28 11:40:22,462 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 38 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2023-01-28 11:40:22,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 350 flow [2023-01-28 11:40:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:40:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:40:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 461 transitions. [2023-01-28 11:40:22,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448443579766537 [2023-01-28 11:40:22,463 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 461 transitions. [2023-01-28 11:40:22,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 461 transitions. [2023-01-28 11:40:22,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:22,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 461 transitions. [2023-01-28 11:40:22,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:22,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:22,466 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:22,466 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 165 flow. Second operand 4 states and 461 transitions. [2023-01-28 11:40:22,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 350 flow [2023-01-28 11:40:22,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 308 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-01-28 11:40:22,471 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 222 flow [2023-01-28 11:40:22,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-01-28 11:40:22,472 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-01-28 11:40:22,472 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 222 flow [2023-01-28 11:40:22,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.85714285714286) internal successors, (776), 7 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:22,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:22,473 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:22,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 11:40:22,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:22,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:22,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:22,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1347002828, now seen corresponding path program 3 times [2023-01-28 11:40:22,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:22,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678159583] [2023-01-28 11:40:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:23,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:23,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678159583] [2023-01-28 11:40:23,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678159583] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:23,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974152014] [2023-01-28 11:40:23,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:40:23,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:23,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:23,712 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) [2023-01-28 11:40:23,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 11:40:23,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:40:23,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:23,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-28 11:40:23,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:40:23,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:24,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:24,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2023-01-28 11:40:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:40:24,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974152014] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:24,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:24,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2023-01-28 11:40:24,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810629750] [2023-01-28 11:40:24,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:24,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 11:40:24,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:24,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 11:40:24,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-01-28 11:40:24,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 11:40:24,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 222 flow. Second operand has 22 states, 22 states have (on average 79.13636363636364) internal successors, (1741), 22 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:24,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:24,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 11:40:24,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:24,756 INFO L130 PetriNetUnfolder]: 313/613 cut-off events. [2023-01-28 11:40:24,756 INFO L131 PetriNetUnfolder]: For 849/849 co-relation queries the response was YES. [2023-01-28 11:40:24,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 613 events. 313/613 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2843 event pairs, 48 based on Foata normal form. 3/614 useless extension candidates. Maximal degree in co-relation 1298. Up to 174 conditions per place. [2023-01-28 11:40:24,759 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 49 selfloop transitions, 25 changer transitions 44/118 dead transitions. [2023-01-28 11:40:24,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 118 transitions, 767 flow [2023-01-28 11:40:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 11:40:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 11:40:24,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1337 transitions. [2023-01-28 11:40:24,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32514591439688717 [2023-01-28 11:40:24,762 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1337 transitions. [2023-01-28 11:40:24,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1337 transitions. [2023-01-28 11:40:24,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:24,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1337 transitions. [2023-01-28 11:40:24,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 83.5625) internal successors, (1337), 16 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:24,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:24,769 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:24,769 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 222 flow. Second operand 16 states and 1337 transitions. [2023-01-28 11:40:24,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 118 transitions, 767 flow [2023-01-28 11:40:24,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 118 transitions, 737 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-01-28 11:40:24,772 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 367 flow [2023-01-28 11:40:24,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=367, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-01-28 11:40:24,773 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-01-28 11:40:24,773 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 367 flow [2023-01-28 11:40:24,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 79.13636363636364) internal successors, (1741), 22 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:24,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:24,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:24,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 11:40:24,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:24,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:24,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:24,979 INFO L85 PathProgramCache]: Analyzing trace with hash -218673542, now seen corresponding path program 4 times [2023-01-28 11:40:24,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:24,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494298241] [2023-01-28 11:40:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:24,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:25,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:25,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494298241] [2023-01-28 11:40:25,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494298241] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:25,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199479109] [2023-01-28 11:40:25,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:40:25,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:25,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:25,726 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) [2023-01-28 11:40:25,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 11:40:25,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:40:25,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:25,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 11:40:25,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:40:25,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:26,294 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 11:40:26,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 170 [2023-01-28 11:40:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:40:26,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199479109] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:26,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:26,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 21 [2023-01-28 11:40:26,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709999514] [2023-01-28 11:40:26,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:26,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 11:40:26,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:26,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 11:40:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-01-28 11:40:26,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 11:40:26,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 367 flow. Second operand has 23 states, 23 states have (on average 79.21739130434783) internal successors, (1822), 23 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:26,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:26,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 11:40:26,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:27,164 INFO L130 PetriNetUnfolder]: 441/846 cut-off events. [2023-01-28 11:40:27,165 INFO L131 PetriNetUnfolder]: For 1454/1454 co-relation queries the response was YES. [2023-01-28 11:40:27,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2805 conditions, 846 events. 441/846 cut-off events. For 1454/1454 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4222 event pairs, 20 based on Foata normal form. 2/848 useless extension candidates. Maximal degree in co-relation 2116. Up to 186 conditions per place. [2023-01-28 11:40:27,168 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 63 selfloop transitions, 35 changer transitions 63/161 dead transitions. [2023-01-28 11:40:27,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 161 transitions, 1121 flow [2023-01-28 11:40:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 11:40:27,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 11:40:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1761 transitions. [2023-01-28 11:40:27,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3262923846581434 [2023-01-28 11:40:27,173 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1761 transitions. [2023-01-28 11:40:27,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1761 transitions. [2023-01-28 11:40:27,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:27,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1761 transitions. [2023-01-28 11:40:27,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.85714285714286) internal successors, (1761), 21 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:27,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:27,181 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:27,181 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 367 flow. Second operand 21 states and 1761 transitions. [2023-01-28 11:40:27,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 161 transitions, 1121 flow [2023-01-28 11:40:27,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 161 transitions, 1051 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-01-28 11:40:27,188 INFO L231 Difference]: Finished difference. Result has 74 places, 57 transitions, 525 flow [2023-01-28 11:40:27,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=525, PETRI_PLACES=74, PETRI_TRANSITIONS=57} [2023-01-28 11:40:27,188 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-01-28 11:40:27,188 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 57 transitions, 525 flow [2023-01-28 11:40:27,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 79.21739130434783) internal successors, (1822), 23 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:27,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:27,189 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:27,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 11:40:27,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:27,394 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:27,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:27,395 INFO L85 PathProgramCache]: Analyzing trace with hash -417535956, now seen corresponding path program 5 times [2023-01-28 11:40:27,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:27,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700244461] [2023-01-28 11:40:27,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:27,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:28,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:28,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700244461] [2023-01-28 11:40:28,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700244461] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:28,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980851946] [2023-01-28 11:40:28,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:40:28,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:28,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:28,220 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) [2023-01-28 11:40:28,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 11:40:28,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:40:28,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:28,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 11:40:28,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:28,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:28,856 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 11:40:28,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 170 [2023-01-28 11:40:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:29,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980851946] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:29,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:29,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-01-28 11:40:29,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445179740] [2023-01-28 11:40:29,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:29,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 11:40:29,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:29,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 11:40:29,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2023-01-28 11:40:29,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 11:40:29,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 57 transitions, 525 flow. Second operand has 28 states, 28 states have (on average 78.85714285714286) internal successors, (2208), 28 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:29,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:29,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 11:40:29,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:30,230 INFO L130 PetriNetUnfolder]: 569/1117 cut-off events. [2023-01-28 11:40:30,231 INFO L131 PetriNetUnfolder]: For 2072/2072 co-relation queries the response was YES. [2023-01-28 11:40:30,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3729 conditions, 1117 events. 569/1117 cut-off events. For 2072/2072 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6122 event pairs, 76 based on Foata normal form. 41/1158 useless extension candidates. Maximal degree in co-relation 3550. Up to 228 conditions per place. [2023-01-28 11:40:30,235 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 62 selfloop transitions, 33 changer transitions 63/158 dead transitions. [2023-01-28 11:40:30,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 158 transitions, 1223 flow [2023-01-28 11:40:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 11:40:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 11:40:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1594 transitions. [2023-01-28 11:40:30,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3264386647552734 [2023-01-28 11:40:30,239 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1594 transitions. [2023-01-28 11:40:30,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1594 transitions. [2023-01-28 11:40:30,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:30,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1594 transitions. [2023-01-28 11:40:30,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.89473684210526) internal successors, (1594), 19 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:30,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:30,246 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:30,246 INFO L175 Difference]: Start difference. First operand has 74 places, 57 transitions, 525 flow. Second operand 19 states and 1594 transitions. [2023-01-28 11:40:30,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 158 transitions, 1223 flow [2023-01-28 11:40:30,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 158 transitions, 1101 flow, removed 41 selfloop flow, removed 8 redundant places. [2023-01-28 11:40:30,253 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 587 flow [2023-01-28 11:40:30,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=587, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2023-01-28 11:40:30,255 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-01-28 11:40:30,255 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 587 flow [2023-01-28 11:40:30,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 78.85714285714286) internal successors, (2208), 28 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:30,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:30,256 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:30,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 11:40:30,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:30,461 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:30,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:30,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1104904085, now seen corresponding path program 6 times [2023-01-28 11:40:30,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:30,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020109997] [2023-01-28 11:40:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:30,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:40:30,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:30,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020109997] [2023-01-28 11:40:30,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020109997] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:30,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922255614] [2023-01-28 11:40:30,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:40:30,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:30,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:30,653 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) [2023-01-28 11:40:30,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 11:40:30,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:40:30,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:30,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:40:30,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:30,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:30,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 108 [2023-01-28 11:40:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:40:30,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:31,024 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 11:40:31,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 126 [2023-01-28 11:40:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:40:31,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922255614] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:31,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:31,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2023-01-28 11:40:31,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495432826] [2023-01-28 11:40:31,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:31,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 11:40:31,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:31,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 11:40:31,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-01-28 11:40:31,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 257 [2023-01-28 11:40:31,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 587 flow. Second operand has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:31,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:31,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 257 [2023-01-28 11:40:31,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:31,448 INFO L130 PetriNetUnfolder]: 899/1721 cut-off events. [2023-01-28 11:40:31,448 INFO L131 PetriNetUnfolder]: For 6271/6271 co-relation queries the response was YES. [2023-01-28 11:40:31,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6663 conditions, 1721 events. 899/1721 cut-off events. For 6271/6271 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10303 event pairs, 134 based on Foata normal form. 20/1725 useless extension candidates. Maximal degree in co-relation 5990. Up to 515 conditions per place. [2023-01-28 11:40:31,455 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 69 selfloop transitions, 47 changer transitions 39/158 dead transitions. [2023-01-28 11:40:31,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 158 transitions, 1466 flow [2023-01-28 11:40:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 11:40:31,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 11:40:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1377 transitions. [2023-01-28 11:40:31,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35719844357976654 [2023-01-28 11:40:31,459 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1377 transitions. [2023-01-28 11:40:31,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1377 transitions. [2023-01-28 11:40:31,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:31,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1377 transitions. [2023-01-28 11:40:31,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:31,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:31,466 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:31,466 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 587 flow. Second operand 15 states and 1377 transitions. [2023-01-28 11:40:31,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 158 transitions, 1466 flow [2023-01-28 11:40:31,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 158 transitions, 1379 flow, removed 20 selfloop flow, removed 13 redundant places. [2023-01-28 11:40:31,478 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 973 flow [2023-01-28 11:40:31,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=973, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2023-01-28 11:40:31,478 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-01-28 11:40:31,479 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 973 flow [2023-01-28 11:40:31,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:31,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:31,479 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:31,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 11:40:31,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:31,684 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:31,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:31,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1313718566, now seen corresponding path program 7 times [2023-01-28 11:40:31,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:31,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376073276] [2023-01-28 11:40:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:31,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:32,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:32,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376073276] [2023-01-28 11:40:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376073276] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:32,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452192867] [2023-01-28 11:40:32,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:40:32,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:32,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:32,740 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) [2023-01-28 11:40:32,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 11:40:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:32,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 11:40:32,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:33,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:33,755 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-01-28 11:40:33,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-01-28 11:40:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:34,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452192867] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:34,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:34,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-01-28 11:40:34,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084002417] [2023-01-28 11:40:34,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:34,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 11:40:34,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:34,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 11:40:34,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2023-01-28 11:40:34,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 11:40:34,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 973 flow. Second operand has 38 states, 38 states have (on average 78.55263157894737) internal successors, (2985), 38 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:34,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:34,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 11:40:34,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:43,844 INFO L130 PetriNetUnfolder]: 3356/6261 cut-off events. [2023-01-28 11:40:43,844 INFO L131 PetriNetUnfolder]: For 32787/32787 co-relation queries the response was YES. [2023-01-28 11:40:43,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28264 conditions, 6261 events. 3356/6261 cut-off events. For 32787/32787 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 46665 event pairs, 301 based on Foata normal form. 125/6386 useless extension candidates. Maximal degree in co-relation 25760. Up to 1789 conditions per place. [2023-01-28 11:40:43,872 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 338 selfloop transitions, 256 changer transitions 261/855 dead transitions. [2023-01-28 11:40:43,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 855 transitions, 8620 flow [2023-01-28 11:40:43,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-01-28 11:40:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-01-28 11:40:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 7433 transitions. [2023-01-28 11:40:43,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3324388389462856 [2023-01-28 11:40:43,882 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 7433 transitions. [2023-01-28 11:40:43,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 7433 transitions. [2023-01-28 11:40:43,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:43,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 7433 transitions. [2023-01-28 11:40:43,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 85.4367816091954) internal successors, (7433), 87 states have internal predecessors, (7433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:43,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:43,913 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:43,913 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 973 flow. Second operand 87 states and 7433 transitions. [2023-01-28 11:40:43,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 855 transitions, 8620 flow [2023-01-28 11:40:43,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 855 transitions, 7243 flow, removed 684 selfloop flow, removed 7 redundant places. [2023-01-28 11:40:43,970 INFO L231 Difference]: Finished difference. Result has 225 places, 336 transitions, 5255 flow [2023-01-28 11:40:43,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=5255, PETRI_PLACES=225, PETRI_TRANSITIONS=336} [2023-01-28 11:40:43,970 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 205 predicate places. [2023-01-28 11:40:43,971 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 336 transitions, 5255 flow [2023-01-28 11:40:43,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 78.55263157894737) internal successors, (2985), 38 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:43,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:43,972 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:43,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-01-28 11:40:44,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:44,177 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:44,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash -533908624, now seen corresponding path program 8 times [2023-01-28 11:40:44,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:44,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107769652] [2023-01-28 11:40:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:44,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:45,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:45,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107769652] [2023-01-28 11:40:45,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107769652] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:45,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829567581] [2023-01-28 11:40:45,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:40:45,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:45,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:45,289 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) [2023-01-28 11:40:45,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 11:40:45,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:40:45,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:45,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-28 11:40:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:45,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 11:40:45,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:40:45,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:40:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:45,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:46,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:46,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-01-28 11:40:46,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:46,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 772 [2023-01-28 11:40:46,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:46,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 256 treesize of output 300 [2023-01-28 11:40:46,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:46,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 259 [2023-01-28 11:40:51,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:51,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-01-28 11:40:51,428 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 11:40:51,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 700 [2023-01-28 11:40:51,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:40:51,448 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:40:51,452 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:40:51,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:40:51,453 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:40:51,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:40:51,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 216 [2023-01-28 11:40:51,484 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 11:40:51,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 187 [2023-01-28 11:40:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:51,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829567581] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:51,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:51,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-01-28 11:40:51,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945927935] [2023-01-28 11:40:51,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:51,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 11:40:51,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:51,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 11:40:51,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1301, Unknown=7, NotChecked=0, Total=1560 [2023-01-28 11:40:51,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 11:40:51,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 336 transitions, 5255 flow. Second operand has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:51,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:51,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 11:40:51,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:57,662 INFO L130 PetriNetUnfolder]: 4551/8460 cut-off events. [2023-01-28 11:40:57,662 INFO L131 PetriNetUnfolder]: For 158967/158967 co-relation queries the response was YES. [2023-01-28 11:40:57,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39133 conditions, 8460 events. 4551/8460 cut-off events. For 158967/158967 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 65441 event pairs, 1481 based on Foata normal form. 16/8476 useless extension candidates. Maximal degree in co-relation 37262. Up to 4858 conditions per place. [2023-01-28 11:40:57,724 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 425 selfloop transitions, 178 changer transitions 171/774 dead transitions. [2023-01-28 11:40:57,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 774 transitions, 10560 flow [2023-01-28 11:40:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-01-28 11:40:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-01-28 11:40:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3998 transitions. [2023-01-28 11:40:57,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2991619275665968 [2023-01-28 11:40:57,728 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3998 transitions. [2023-01-28 11:40:57,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3998 transitions. [2023-01-28 11:40:57,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:57,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3998 transitions. [2023-01-28 11:40:57,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 76.88461538461539) internal successors, (3998), 52 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:57,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 257.0) internal successors, (13621), 53 states have internal predecessors, (13621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:57,743 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 257.0) internal successors, (13621), 53 states have internal predecessors, (13621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:57,743 INFO L175 Difference]: Start difference. First operand has 225 places, 336 transitions, 5255 flow. Second operand 52 states and 3998 transitions. [2023-01-28 11:40:57,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 774 transitions, 10560 flow [2023-01-28 11:40:58,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 774 transitions, 7545 flow, removed 1496 selfloop flow, removed 8 redundant places. [2023-01-28 11:40:58,321 INFO L231 Difference]: Finished difference. Result has 287 places, 452 transitions, 5497 flow [2023-01-28 11:40:58,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5497, PETRI_PLACES=287, PETRI_TRANSITIONS=452} [2023-01-28 11:40:58,322 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 267 predicate places. [2023-01-28 11:40:58,322 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 452 transitions, 5497 flow [2023-01-28 11:40:58,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:58,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:58,323 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:58,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 11:40:58,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 11:40:58,543 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:58,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash 360516940, now seen corresponding path program 9 times [2023-01-28 11:40:58,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:58,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2218684] [2023-01-28 11:40:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:58,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:59,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:59,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2218684] [2023-01-28 11:40:59,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2218684] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:59,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007973766] [2023-01-28 11:40:59,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:40:59,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:59,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:59,586 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) [2023-01-28 11:40:59,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 11:40:59,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:40:59,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 62 conjunts are in the unsatisfiable core [2023-01-28 11:40:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:59,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 11:40:59,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:41:00,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:41:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:00,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:01,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:01,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-01-28 11:41:01,424 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-28 11:41:01,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 378 [2023-01-28 11:41:01,477 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-28 11:41:01,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 298 [2023-01-28 11:41:01,535 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-28 11:41:01,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 229 [2023-01-28 11:41:03,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:03,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-01-28 11:41:03,512 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 11:41:03,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 336 [2023-01-28 11:41:03,543 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 11:41:03,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 256 [2023-01-28 11:41:03,570 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 11:41:03,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 187 [2023-01-28 11:41:03,710 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 11:41:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:03,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007973766] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:03,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:03,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-01-28 11:41:03,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468105741] [2023-01-28 11:41:03,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:03,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 11:41:03,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:03,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 11:41:03,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1222, Unknown=4, NotChecked=0, Total=1560 [2023-01-28 11:41:03,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 11:41:03,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 452 transitions, 5497 flow. Second operand has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:03,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:03,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 11:41:03,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:08,292 INFO L130 PetriNetUnfolder]: 4393/8211 cut-off events. [2023-01-28 11:41:08,292 INFO L131 PetriNetUnfolder]: For 137740/137740 co-relation queries the response was YES. [2023-01-28 11:41:08,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33031 conditions, 8211 events. 4393/8211 cut-off events. For 137740/137740 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 63852 event pairs, 1462 based on Foata normal form. 36/8247 useless extension candidates. Maximal degree in co-relation 31877. Up to 6043 conditions per place. [2023-01-28 11:41:08,382 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 390 selfloop transitions, 101 changer transitions 150/641 dead transitions. [2023-01-28 11:41:08,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 641 transitions, 7243 flow [2023-01-28 11:41:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 11:41:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 11:41:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3125 transitions. [2023-01-28 11:41:08,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2965739774129259 [2023-01-28 11:41:08,399 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3125 transitions. [2023-01-28 11:41:08,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3125 transitions. [2023-01-28 11:41:08,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:08,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3125 transitions. [2023-01-28 11:41:08,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 76.21951219512195) internal successors, (3125), 41 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:08,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 257.0) internal successors, (10794), 42 states have internal predecessors, (10794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:08,408 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 257.0) internal successors, (10794), 42 states have internal predecessors, (10794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:08,408 INFO L175 Difference]: Start difference. First operand has 287 places, 452 transitions, 5497 flow. Second operand 41 states and 3125 transitions. [2023-01-28 11:41:08,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 641 transitions, 7243 flow [2023-01-28 11:41:09,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 641 transitions, 6873 flow, removed 144 selfloop flow, removed 17 redundant places. [2023-01-28 11:41:09,137 INFO L231 Difference]: Finished difference. Result has 314 places, 429 transitions, 5084 flow [2023-01-28 11:41:09,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=4733, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5084, PETRI_PLACES=314, PETRI_TRANSITIONS=429} [2023-01-28 11:41:09,137 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 294 predicate places. [2023-01-28 11:41:09,138 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 429 transitions, 5084 flow [2023-01-28 11:41:09,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:09,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:09,138 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:09,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:09,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:09,344 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:41:09,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash -899584993, now seen corresponding path program 10 times [2023-01-28 11:41:09,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:09,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134558300] [2023-01-28 11:41:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:09,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:41:09,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:09,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134558300] [2023-01-28 11:41:09,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134558300] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:09,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411232111] [2023-01-28 11:41:09,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:41:09,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:09,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:09,558 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) [2023-01-28 11:41:09,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 11:41:09,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:41:09,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:09,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 11:41:09,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:09,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:09,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 226 treesize of output 140 [2023-01-28 11:41:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:41:09,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:10,147 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-01-28 11:41:10,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 260 treesize of output 176 [2023-01-28 11:41:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:41:10,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411232111] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:10,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:10,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 23 [2023-01-28 11:41:10,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387775503] [2023-01-28 11:41:10,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:10,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 11:41:10,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 11:41:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-01-28 11:41:10,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 257 [2023-01-28 11:41:10,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 429 transitions, 5084 flow. Second operand has 24 states, 24 states have (on average 87.125) internal successors, (2091), 24 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:10,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:10,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 257 [2023-01-28 11:41:10,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:12,151 INFO L130 PetriNetUnfolder]: 3167/6088 cut-off events. [2023-01-28 11:41:12,151 INFO L131 PetriNetUnfolder]: For 59334/59336 co-relation queries the response was YES. [2023-01-28 11:41:12,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23510 conditions, 6088 events. 3167/6088 cut-off events. For 59334/59336 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 47201 event pairs, 479 based on Foata normal form. 248/6324 useless extension candidates. Maximal degree in co-relation 23182. Up to 1320 conditions per place. [2023-01-28 11:41:12,193 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 112 selfloop transitions, 124 changer transitions 209/449 dead transitions. [2023-01-28 11:41:12,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 449 transitions, 6355 flow [2023-01-28 11:41:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 11:41:12,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 11:41:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2678 transitions. [2023-01-28 11:41:12,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35931839527706966 [2023-01-28 11:41:12,195 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2678 transitions. [2023-01-28 11:41:12,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2678 transitions. [2023-01-28 11:41:12,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:12,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2678 transitions. [2023-01-28 11:41:12,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 92.34482758620689) internal successors, (2678), 29 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:12,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 257.0) internal successors, (7710), 30 states have internal predecessors, (7710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:12,202 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 257.0) internal successors, (7710), 30 states have internal predecessors, (7710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:12,202 INFO L175 Difference]: Start difference. First operand has 314 places, 429 transitions, 5084 flow. Second operand 29 states and 2678 transitions. [2023-01-28 11:41:12,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 449 transitions, 6355 flow [2023-01-28 11:41:12,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 449 transitions, 5301 flow, removed 398 selfloop flow, removed 76 redundant places. [2023-01-28 11:41:12,479 INFO L231 Difference]: Finished difference. Result has 240 places, 177 transitions, 2612 flow [2023-01-28 11:41:12,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2612, PETRI_PLACES=240, PETRI_TRANSITIONS=177} [2023-01-28 11:41:12,479 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 220 predicate places. [2023-01-28 11:41:12,479 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 177 transitions, 2612 flow [2023-01-28 11:41:12,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 87.125) internal successors, (2091), 24 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:12,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:12,480 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:12,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:12,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 11:41:12,685 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:41:12,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:12,685 INFO L85 PathProgramCache]: Analyzing trace with hash 600606014, now seen corresponding path program 11 times [2023-01-28 11:41:12,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:12,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959485976] [2023-01-28 11:41:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:12,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:16,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:16,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959485976] [2023-01-28 11:41:16,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959485976] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:16,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726658787] [2023-01-28 11:41:16,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:41:16,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:16,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:16,227 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) [2023-01-28 11:41:16,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 11:41:16,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 11:41:16,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:16,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 11:41:16,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:41:16,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:17,233 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-01-28 11:41:17,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 264 treesize of output 230 [2023-01-28 11:41:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:41:18,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726658787] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:18,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:18,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 31 [2023-01-28 11:41:18,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560338652] [2023-01-28 11:41:18,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:18,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 11:41:18,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:18,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 11:41:18,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 11:41:18,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 11:41:18,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 177 transitions, 2612 flow. Second operand has 33 states, 33 states have (on average 71.81818181818181) internal successors, (2370), 33 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:18,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:18,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 11:41:18,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:21,692 INFO L130 PetriNetUnfolder]: 3406/6305 cut-off events. [2023-01-28 11:41:21,692 INFO L131 PetriNetUnfolder]: For 66975/66975 co-relation queries the response was YES. [2023-01-28 11:41:21,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27437 conditions, 6305 events. 3406/6305 cut-off events. For 66975/66975 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 46403 event pairs, 320 based on Foata normal form. 39/6344 useless extension candidates. Maximal degree in co-relation 27367. Up to 1369 conditions per place. [2023-01-28 11:41:21,719 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 188 selfloop transitions, 238 changer transitions 154/580 dead transitions. [2023-01-28 11:41:21,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 580 transitions, 7298 flow [2023-01-28 11:41:21,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 11:41:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 11:41:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3406 transitions. [2023-01-28 11:41:21,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3012026883622214 [2023-01-28 11:41:21,722 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3406 transitions. [2023-01-28 11:41:21,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3406 transitions. [2023-01-28 11:41:21,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:21,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3406 transitions. [2023-01-28 11:41:21,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 77.4090909090909) internal successors, (3406), 44 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 257.0) internal successors, (11565), 45 states have internal predecessors, (11565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,731 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 257.0) internal successors, (11565), 45 states have internal predecessors, (11565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,731 INFO L175 Difference]: Start difference. First operand has 240 places, 177 transitions, 2612 flow. Second operand 44 states and 3406 transitions. [2023-01-28 11:41:21,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 580 transitions, 7298 flow [2023-01-28 11:41:21,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 580 transitions, 6305 flow, removed 418 selfloop flow, removed 40 redundant places. [2023-01-28 11:41:21,867 INFO L231 Difference]: Finished difference. Result has 179 places, 310 transitions, 5079 flow [2023-01-28 11:41:21,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5079, PETRI_PLACES=179, PETRI_TRANSITIONS=310} [2023-01-28 11:41:21,867 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 159 predicate places. [2023-01-28 11:41:21,867 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 310 transitions, 5079 flow [2023-01-28 11:41:21,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 71.81818181818181) internal successors, (2370), 33 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:21,868 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:21,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:22,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 11:41:22,073 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:41:22,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:22,073 INFO L85 PathProgramCache]: Analyzing trace with hash 530970796, now seen corresponding path program 12 times [2023-01-28 11:41:22,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:22,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245242584] [2023-01-28 11:41:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:22,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:23,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:23,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245242584] [2023-01-28 11:41:23,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245242584] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:23,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538047360] [2023-01-28 11:41:23,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:41:23,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:23,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:23,616 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) [2023-01-28 11:41:23,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 11:41:23,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:41:23,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:23,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 71 conjunts are in the unsatisfiable core [2023-01-28 11:41:23,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:23,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 11:41:24,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:41:24,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:41:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:24,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:25,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:25,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-01-28 11:41:26,053 INFO L321 Elim1Store]: treesize reduction 60, result has 60.8 percent of original size [2023-01-28 11:41:26,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 990 [2023-01-28 11:41:26,091 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:41:26,092 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:41:26,094 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:41:26,096 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:41:26,097 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:41:26,100 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:41:26,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:26,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 340 treesize of output 378 [2023-01-28 11:41:26,236 INFO L321 Elim1Store]: treesize reduction 60, result has 60.8 percent of original size [2023-01-28 11:41:26,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 323 [2023-01-28 11:41:31,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:31,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-01-28 11:41:31,978 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 11:41:31,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 440 [2023-01-28 11:41:32,036 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 11:41:32,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 332 [2023-01-28 11:41:32,078 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 11:41:32,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 247 [2023-01-28 11:41:32,266 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 11:41:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538047360] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:32,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:32,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2023-01-28 11:41:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038903822] [2023-01-28 11:41:32,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:32,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-01-28 11:41:32,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-01-28 11:41:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1734, Unknown=7, NotChecked=0, Total=2256 [2023-01-28 11:41:32,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 11:41:32,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 310 transitions, 5079 flow. Second operand has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:32,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:32,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 11:41:32,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:48,587 WARN L222 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 98 DAG size of output: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:42:00,280 INFO L130 PetriNetUnfolder]: 7618/14277 cut-off events. [2023-01-28 11:42:00,280 INFO L131 PetriNetUnfolder]: For 130775/130775 co-relation queries the response was YES. [2023-01-28 11:42:00,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65587 conditions, 14277 events. 7618/14277 cut-off events. For 130775/130775 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 119197 event pairs, 1504 based on Foata normal form. 216/14493 useless extension candidates. Maximal degree in co-relation 65525. Up to 5684 conditions per place. [2023-01-28 11:42:00,363 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 551 selfloop transitions, 462 changer transitions 200/1213 dead transitions. [2023-01-28 11:42:00,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1213 transitions, 17979 flow [2023-01-28 11:42:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-01-28 11:42:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-01-28 11:42:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6608 transitions. [2023-01-28 11:42:00,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30249485008010984 [2023-01-28 11:42:00,369 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6608 transitions. [2023-01-28 11:42:00,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6608 transitions. [2023-01-28 11:42:00,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:00,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6608 transitions. [2023-01-28 11:42:00,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 77.74117647058823) internal successors, (6608), 85 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:00,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:00,387 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:00,387 INFO L175 Difference]: Start difference. First operand has 179 places, 310 transitions, 5079 flow. Second operand 85 states and 6608 transitions. [2023-01-28 11:42:00,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1213 transitions, 17979 flow [2023-01-28 11:42:01,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1213 transitions, 17196 flow, removed 356 selfloop flow, removed 13 redundant places. [2023-01-28 11:42:01,020 INFO L231 Difference]: Finished difference. Result has 297 places, 733 transitions, 13889 flow [2023-01-28 11:42:01,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=4584, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=13889, PETRI_PLACES=297, PETRI_TRANSITIONS=733} [2023-01-28 11:42:01,020 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 277 predicate places. [2023-01-28 11:42:01,020 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 733 transitions, 13889 flow [2023-01-28 11:42:01,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:01,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:01,021 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:01,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-01-28 11:42:01,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 11:42:01,226 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:42:01,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:01,227 INFO L85 PathProgramCache]: Analyzing trace with hash 630946832, now seen corresponding path program 13 times [2023-01-28 11:42:01,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:01,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315673732] [2023-01-28 11:42:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:01,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:02,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:02,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315673732] [2023-01-28 11:42:02,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315673732] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:02,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943025794] [2023-01-28 11:42:02,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:42:02,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:02,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:02,996 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) [2023-01-28 11:42:02,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 11:42:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:03,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 11:42:03,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:03,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:04,534 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-28 11:42:04,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 330 [2023-01-28 11:42:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:08,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943025794] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:08,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:08,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-01-28 11:42:08,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544069699] [2023-01-28 11:42:08,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:08,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 11:42:08,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:08,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 11:42:08,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1741, Unknown=0, NotChecked=0, Total=2070 [2023-01-28 11:42:08,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 11:42:08,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 733 transitions, 13889 flow. Second operand has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:08,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:08,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 11:42:08,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:24,489 INFO L130 PetriNetUnfolder]: 15210/28176 cut-off events. [2023-01-28 11:42:24,490 INFO L131 PetriNetUnfolder]: For 678225/678225 co-relation queries the response was YES. [2023-01-28 11:42:24,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145091 conditions, 28176 events. 15210/28176 cut-off events. For 678225/678225 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 261643 event pairs, 3348 based on Foata normal form. 112/28288 useless extension candidates. Maximal degree in co-relation 144982. Up to 10616 conditions per place. [2023-01-28 11:42:24,899 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 948 selfloop transitions, 845 changer transitions 317/2110 dead transitions. [2023-01-28 11:42:24,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 2110 transitions, 36687 flow [2023-01-28 11:42:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-01-28 11:42:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-01-28 11:42:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 7410 transitions. [2023-01-28 11:42:24,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3035019455252918 [2023-01-28 11:42:24,907 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 7410 transitions. [2023-01-28 11:42:24,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 7410 transitions. [2023-01-28 11:42:24,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:24,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 7410 transitions. [2023-01-28 11:42:24,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 78.0) internal successors, (7410), 95 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:24,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 257.0) internal successors, (24672), 96 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:24,927 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 257.0) internal successors, (24672), 96 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:24,927 INFO L175 Difference]: Start difference. First operand has 297 places, 733 transitions, 13889 flow. Second operand 95 states and 7410 transitions. [2023-01-28 11:42:24,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 2110 transitions, 36687 flow [2023-01-28 11:42:28,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 2110 transitions, 33019 flow, removed 1805 selfloop flow, removed 15 redundant places. [2023-01-28 11:42:28,701 INFO L231 Difference]: Finished difference. Result has 426 places, 1479 transitions, 28687 flow [2023-01-28 11:42:28,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=11739, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=28687, PETRI_PLACES=426, PETRI_TRANSITIONS=1479} [2023-01-28 11:42:28,702 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 406 predicate places. [2023-01-28 11:42:28,703 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1479 transitions, 28687 flow [2023-01-28 11:42:28,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:28,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:28,703 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:28,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 11:42:28,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 11:42:28,908 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:42:28,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash -988246562, now seen corresponding path program 14 times [2023-01-28 11:42:28,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:28,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681571509] [2023-01-28 11:42:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:28,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:30,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:30,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681571509] [2023-01-28 11:42:30,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681571509] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:30,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619300987] [2023-01-28 11:42:30,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:42:30,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:30,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:30,659 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) [2023-01-28 11:42:30,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 11:42:30,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:42:30,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-28 11:42:30,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:30,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:42:30,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:42:31,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:42:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:31,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:32,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:32,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-01-28 11:42:32,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:32,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 576 [2023-01-28 11:42:33,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:33,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 468 [2023-01-28 11:42:33,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:33,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 383 [2023-01-28 11:43:02,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:43:02,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-01-28 11:43:02,758 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 11:43:02,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 440 [2023-01-28 11:43:02,799 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 11:43:02,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 332 [2023-01-28 11:43:02,843 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 11:43:02,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 247 [2023-01-28 11:43:03,010 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 11:43:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:03,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619300987] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:43:03,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:43:03,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2023-01-28 11:43:03,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981234141] [2023-01-28 11:43:03,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:43:03,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-01-28 11:43:03,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:43:03,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-01-28 11:43:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1928, Unknown=7, NotChecked=0, Total=2352 [2023-01-28 11:43:03,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 11:43:03,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1479 transitions, 28687 flow. Second operand has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:03,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:43:03,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 11:43:03,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:43:29,191 INFO L130 PetriNetUnfolder]: 19666/36666 cut-off events. [2023-01-28 11:43:29,191 INFO L131 PetriNetUnfolder]: For 1941337/1941337 co-relation queries the response was YES. [2023-01-28 11:43:29,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213725 conditions, 36666 events. 19666/36666 cut-off events. For 1941337/1941337 co-relation queries the response was YES. Maximal size of possible extension queue 1921. Compared 351581 event pairs, 5308 based on Foata normal form. 404/37070 useless extension candidates. Maximal degree in co-relation 213566. Up to 15462 conditions per place. [2023-01-28 11:43:30,032 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 1381 selfloop transitions, 904 changer transitions 229/2514 dead transitions. [2023-01-28 11:43:30,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 2514 transitions, 52647 flow [2023-01-28 11:43:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-01-28 11:43:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-01-28 11:43:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 5974 transitions. [2023-01-28 11:43:30,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3018848855424731 [2023-01-28 11:43:30,037 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 5974 transitions. [2023-01-28 11:43:30,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 5974 transitions. [2023-01-28 11:43:30,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:43:30,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 5974 transitions. [2023-01-28 11:43:30,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 77.58441558441558) internal successors, (5974), 77 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:30,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 257.0) internal successors, (20046), 78 states have internal predecessors, (20046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:30,052 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 257.0) internal successors, (20046), 78 states have internal predecessors, (20046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:30,052 INFO L175 Difference]: Start difference. First operand has 426 places, 1479 transitions, 28687 flow. Second operand 77 states and 5974 transitions. [2023-01-28 11:43:30,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 2514 transitions, 52647 flow [2023-01-28 11:43:40,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 2514 transitions, 41521 flow, removed 5532 selfloop flow, removed 16 redundant places. [2023-01-28 11:43:40,701 INFO L231 Difference]: Finished difference. Result has 519 places, 1751 transitions, 32210 flow [2023-01-28 11:43:40,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=19046, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=32210, PETRI_PLACES=519, PETRI_TRANSITIONS=1751} [2023-01-28 11:43:40,702 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 499 predicate places. [2023-01-28 11:43:40,703 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1751 transitions, 32210 flow [2023-01-28 11:43:40,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:40,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:43:40,703 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:43:40,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 11:43:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:43:40,908 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:43:40,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:43:40,908 INFO L85 PathProgramCache]: Analyzing trace with hash -349342824, now seen corresponding path program 15 times [2023-01-28 11:43:40,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:43:40,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129563910] [2023-01-28 11:43:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:43:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:43:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:43:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:42,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:43:42,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129563910] [2023-01-28 11:43:42,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129563910] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:43:42,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695019903] [2023-01-28 11:43:42,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:43:42,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:43:42,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:43:42,190 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) [2023-01-28 11:43:42,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 11:43:42,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 11:43:42,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:43:42,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 11:43:42,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:43:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:43,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:43:44,159 INFO L321 Elim1Store]: treesize reduction 82, result has 54.7 percent of original size [2023-01-28 11:43:44,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 328 treesize of output 272 [2023-01-28 11:43:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:45,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695019903] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:43:45,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:43:45,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-01-28 11:43:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342725502] [2023-01-28 11:43:45,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:43:45,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 11:43:45,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:43:45,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 11:43:45,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1568, Unknown=0, NotChecked=0, Total=2070 [2023-01-28 11:43:45,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 11:43:45,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1751 transitions, 32210 flow. Second operand has 46 states, 46 states have (on average 78.5) internal successors, (3611), 46 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:45,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:43:45,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 11:43:45,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:44:14,482 INFO L130 PetriNetUnfolder]: 20662/38461 cut-off events. [2023-01-28 11:44:14,482 INFO L131 PetriNetUnfolder]: For 2805714/2805714 co-relation queries the response was YES. [2023-01-28 11:44:15,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220486 conditions, 38461 events. 20662/38461 cut-off events. For 2805714/2805714 co-relation queries the response was YES. Maximal size of possible extension queue 2027. Compared 368011 event pairs, 6602 based on Foata normal form. 205/38666 useless extension candidates. Maximal degree in co-relation 220284. Up to 27399 conditions per place. [2023-01-28 11:44:15,430 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 1680 selfloop transitions, 590 changer transitions 262/2532 dead transitions. [2023-01-28 11:44:15,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 2532 transitions, 53550 flow [2023-01-28 11:44:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-01-28 11:44:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2023-01-28 11:44:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 8802 transitions. [2023-01-28 11:44:15,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.332514827547127 [2023-01-28 11:44:15,437 INFO L72 ComplementDD]: Start complementDD. Operand 103 states and 8802 transitions. [2023-01-28 11:44:15,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 8802 transitions. [2023-01-28 11:44:15,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:44:15,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 103 states and 8802 transitions. [2023-01-28 11:44:15,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 104 states, 103 states have (on average 85.45631067961165) internal successors, (8802), 103 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:15,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 104 states, 104 states have (on average 257.0) internal successors, (26728), 104 states have internal predecessors, (26728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:15,461 INFO L81 ComplementDD]: Finished complementDD. Result has 104 states, 104 states have (on average 257.0) internal successors, (26728), 104 states have internal predecessors, (26728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:15,461 INFO L175 Difference]: Start difference. First operand has 519 places, 1751 transitions, 32210 flow. Second operand 103 states and 8802 transitions. [2023-01-28 11:44:15,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 2532 transitions, 53550 flow [2023-01-28 11:44:35,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 2532 transitions, 51031 flow, removed 1216 selfloop flow, removed 32 redundant places. [2023-01-28 11:44:35,560 INFO L231 Difference]: Finished difference. Result has 638 places, 1881 transitions, 37814 flow [2023-01-28 11:44:35,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=26631, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=37814, PETRI_PLACES=638, PETRI_TRANSITIONS=1881} [2023-01-28 11:44:35,561 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 618 predicate places. [2023-01-28 11:44:35,561 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 1881 transitions, 37814 flow [2023-01-28 11:44:35,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 78.5) internal successors, (3611), 46 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:35,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:44:35,562 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:44:35,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 11:44:35,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 11:44:35,784 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:44:35,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:44:35,785 INFO L85 PathProgramCache]: Analyzing trace with hash 527195898, now seen corresponding path program 16 times [2023-01-28 11:44:35,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:44:35,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559814780] [2023-01-28 11:44:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:44:35,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:44:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:44:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:44:37,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:44:37,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559814780] [2023-01-28 11:44:37,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559814780] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:44:37,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899677191] [2023-01-28 11:44:37,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:44:37,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:44:37,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:44:37,473 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) [2023-01-28 11:44:37,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 11:44:37,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:44:37,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:44:37,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 11:44:37,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:44:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:44:38,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:44:39,002 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-28 11:44:39,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 330 [2023-01-28 11:44:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:44:42,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899677191] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:44:42,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:44:42,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-01-28 11:44:42,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366403561] [2023-01-28 11:44:42,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:44:42,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 11:44:42,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:44:42,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 11:44:42,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2023-01-28 11:44:42,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 11:44:42,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 1881 transitions, 37814 flow. Second operand has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:42,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:44:42,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 11:44:42,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:45:18,608 INFO L130 PetriNetUnfolder]: 27522/50921 cut-off events. [2023-01-28 11:45:18,608 INFO L131 PetriNetUnfolder]: For 5746050/5746050 co-relation queries the response was YES. [2023-01-28 11:45:20,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301812 conditions, 50921 events. 27522/50921 cut-off events. For 5746050/5746050 co-relation queries the response was YES. Maximal size of possible extension queue 2568. Compared 502679 event pairs, 11066 based on Foata normal form. 74/50995 useless extension candidates. Maximal degree in co-relation 301558. Up to 36072 conditions per place. [2023-01-28 11:45:20,455 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 2196 selfloop transitions, 616 changer transitions 260/3072 dead transitions. [2023-01-28 11:45:20,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 3072 transitions, 61273 flow [2023-01-28 11:45:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-01-28 11:45:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-01-28 11:45:20,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6613 transitions. [2023-01-28 11:45:20,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3027237354085603 [2023-01-28 11:45:20,461 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6613 transitions. [2023-01-28 11:45:20,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6613 transitions. [2023-01-28 11:45:20,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:45:20,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6613 transitions. [2023-01-28 11:45:20,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 77.8) internal successors, (6613), 85 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:45:20,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:45:20,483 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:45:20,483 INFO L175 Difference]: Start difference. First operand has 638 places, 1881 transitions, 37814 flow. Second operand 85 states and 6613 transitions. [2023-01-28 11:45:20,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 3072 transitions, 61273 flow [2023-01-28 11:46:02,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 685 places, 3072 transitions, 56632 flow, removed 2289 selfloop flow, removed 25 redundant places. [2023-01-28 11:46:02,991 INFO L231 Difference]: Finished difference. Result has 720 places, 2370 transitions, 44708 flow [2023-01-28 11:46:02,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=33699, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=44708, PETRI_PLACES=720, PETRI_TRANSITIONS=2370} [2023-01-28 11:46:02,992 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 700 predicate places. [2023-01-28 11:46:02,992 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 2370 transitions, 44708 flow [2023-01-28 11:46:02,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:02,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:46:02,993 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:46:02,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-01-28 11:46:03,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:46:03,197 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:46:03,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:46:03,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1851597076, now seen corresponding path program 17 times [2023-01-28 11:46:03,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:46:03,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862334076] [2023-01-28 11:46:03,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:46:03,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:46:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:46:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:46:04,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:46:04,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862334076] [2023-01-28 11:46:04,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862334076] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:46:04,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938736737] [2023-01-28 11:46:04,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:46:04,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:46:04,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:46:04,533 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) [2023-01-28 11:46:04,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 11:46:04,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:46:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:46:04,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 11:46:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:46:05,148 INFO L321 Elim1Store]: treesize reduction 142, result has 8.4 percent of original size [2023-01-28 11:46:05,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 36 [2023-01-28 11:46:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:46:05,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:46:06,094 INFO L321 Elim1Store]: treesize reduction 82, result has 54.7 percent of original size [2023-01-28 11:46:06,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 318 treesize of output 262 [2023-01-28 11:46:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:46:06,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938736737] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:46:06,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:46:06,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 35 [2023-01-28 11:46:06,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748580762] [2023-01-28 11:46:06,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:46:06,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 11:46:06,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:46:06,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 11:46:06,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 11:46:06,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 11:46:06,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 2370 transitions, 44708 flow. Second operand has 37 states, 37 states have (on average 78.78378378378379) internal successors, (2915), 37 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:06,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:46:06,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 11:46:06,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:46:55,154 INFO L130 PetriNetUnfolder]: 34000/62896 cut-off events. [2023-01-28 11:46:55,154 INFO L131 PetriNetUnfolder]: For 7292580/7292580 co-relation queries the response was YES. [2023-01-28 11:46:57,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369644 conditions, 62896 events. 34000/62896 cut-off events. For 7292580/7292580 co-relation queries the response was YES. Maximal size of possible extension queue 3402. Compared 643809 event pairs, 10596 based on Foata normal form. 216/63112 useless extension candidates. Maximal degree in co-relation 369371. Up to 45042 conditions per place. [2023-01-28 11:46:57,799 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 2267 selfloop transitions, 920 changer transitions 191/3378 dead transitions. [2023-01-28 11:46:57,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 3378 transitions, 70256 flow [2023-01-28 11:46:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-01-28 11:46:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-01-28 11:46:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5612 transitions. [2023-01-28 11:46:57,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33085721023464215 [2023-01-28 11:46:57,803 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5612 transitions. [2023-01-28 11:46:57,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5612 transitions. [2023-01-28 11:46:57,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:46:57,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5612 transitions. [2023-01-28 11:46:57,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 85.03030303030303) internal successors, (5612), 66 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:57,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 257.0) internal successors, (17219), 67 states have internal predecessors, (17219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:57,816 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 257.0) internal successors, (17219), 67 states have internal predecessors, (17219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:57,816 INFO L175 Difference]: Start difference. First operand has 720 places, 2370 transitions, 44708 flow. Second operand 66 states and 5612 transitions. [2023-01-28 11:46:57,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 3378 transitions, 70256 flow [2023-01-28 11:48:08,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 3378 transitions, 68724 flow, removed 746 selfloop flow, removed 15 redundant places. [2023-01-28 11:48:08,217 INFO L231 Difference]: Finished difference. Result has 808 places, 2967 transitions, 59533 flow [2023-01-28 11:48:08,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=43238, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=59533, PETRI_PLACES=808, PETRI_TRANSITIONS=2967} [2023-01-28 11:48:08,219 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 788 predicate places. [2023-01-28 11:48:08,220 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 2967 transitions, 59533 flow [2023-01-28 11:48:08,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 78.78378378378379) internal successors, (2915), 37 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:08,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:48:08,221 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:48:08,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 11:48:08,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:48:08,426 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:48:08,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:48:08,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1542947051, now seen corresponding path program 18 times [2023-01-28 11:48:08,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:48:08,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695724311] [2023-01-28 11:48:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:48:08,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:48:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:48:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:48:08,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:48:08,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695724311] [2023-01-28 11:48:08,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695724311] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:48:08,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899055678] [2023-01-28 11:48:08,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:48:08,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:48:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:48:08,596 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) [2023-01-28 11:48:08,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 11:48:08,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 11:48:08,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:48:08,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 11:48:08,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:48:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:48:08,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:48:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:48:09,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899055678] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:48:09,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:48:09,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-01-28 11:48:09,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964814368] [2023-01-28 11:48:09,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:48:09,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 11:48:09,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:48:09,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 11:48:09,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 11:48:09,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 257 [2023-01-28 11:48:09,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 2967 transitions, 59533 flow. Second operand has 35 states, 35 states have (on average 94.68571428571428) internal successors, (3314), 35 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:09,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:48:09,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 257 [2023-01-28 11:48:09,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:48:28,188 INFO L130 PetriNetUnfolder]: 12580/24011 cut-off events. [2023-01-28 11:48:28,188 INFO L131 PetriNetUnfolder]: For 1635197/1635203 co-relation queries the response was YES. [2023-01-28 11:48:28,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140535 conditions, 24011 events. 12580/24011 cut-off events. For 1635197/1635203 co-relation queries the response was YES. Maximal size of possible extension queue 1659. Compared 228343 event pairs, 4090 based on Foata normal form. 920/24915 useless extension candidates. Maximal degree in co-relation 140224. Up to 14116 conditions per place. [2023-01-28 11:48:28,686 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 758 selfloop transitions, 38 changer transitions 352/1154 dead transitions. [2023-01-28 11:48:28,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 1154 transitions, 28097 flow [2023-01-28 11:48:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 11:48:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 11:48:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1483 transitions. [2023-01-28 11:48:28,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3846952010376135 [2023-01-28 11:48:28,687 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1483 transitions. [2023-01-28 11:48:28,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1483 transitions. [2023-01-28 11:48:28,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:48:28,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1483 transitions. [2023-01-28 11:48:28,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 98.86666666666666) internal successors, (1483), 15 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:28,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:28,690 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:28,690 INFO L175 Difference]: Start difference. First operand has 808 places, 2967 transitions, 59533 flow. Second operand 15 states and 1483 transitions. [2023-01-28 11:48:28,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 1154 transitions, 28097 flow [2023-01-28 11:48:48,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 1154 transitions, 25372 flow, removed 1117 selfloop flow, removed 109 redundant places. [2023-01-28 11:48:48,814 INFO L231 Difference]: Finished difference. Result has 636 places, 777 transitions, 16666 flow [2023-01-28 11:48:48,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=22078, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1046, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16666, PETRI_PLACES=636, PETRI_TRANSITIONS=777} [2023-01-28 11:48:48,815 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 616 predicate places. [2023-01-28 11:48:48,815 INFO L495 AbstractCegarLoop]: Abstraction has has 636 places, 777 transitions, 16666 flow [2023-01-28 11:48:48,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 94.68571428571428) internal successors, (3314), 35 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:48,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:48:48,816 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:48:48,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 11:48:49,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:48:49,021 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:48:49,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:48:49,021 INFO L85 PathProgramCache]: Analyzing trace with hash 469619336, now seen corresponding path program 19 times [2023-01-28 11:48:49,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:48:49,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811687527] [2023-01-28 11:48:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:48:49,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:48:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:48:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:48:51,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:48:51,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811687527] [2023-01-28 11:48:51,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811687527] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:48:51,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351447753] [2023-01-28 11:48:51,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:48:51,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:48:51,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:48:51,164 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) [2023-01-28 11:48:51,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 11:48:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:48:51,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 11:48:51,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:48:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:48:51,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:48:52,464 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-28 11:48:52,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 312 treesize of output 310 [2023-01-28 11:48:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:48:55,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351447753] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:48:55,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:48:55,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 9] total 39 [2023-01-28 11:48:55,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491704642] [2023-01-28 11:48:55,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:48:55,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 11:48:55,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:48:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 11:48:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 11:48:55,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 11:48:55,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 777 transitions, 16666 flow. Second operand has 41 states, 41 states have (on average 78.6829268292683) internal successors, (3226), 41 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:55,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:48:55,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 11:48:55,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:49:08,166 INFO L130 PetriNetUnfolder]: 12760/23564 cut-off events. [2023-01-28 11:49:08,166 INFO L131 PetriNetUnfolder]: For 1899005/1899005 co-relation queries the response was YES. [2023-01-28 11:49:08,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140022 conditions, 23564 events. 12760/23564 cut-off events. For 1899005/1899005 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 212762 event pairs, 2499 based on Foata normal form. 147/23711 useless extension candidates. Maximal degree in co-relation 139778. Up to 8636 conditions per place. [2023-01-28 11:49:08,514 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 649 selfloop transitions, 695 changer transitions 237/1581 dead transitions. [2023-01-28 11:49:08,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1581 transitions, 32962 flow [2023-01-28 11:49:08,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-28 11:49:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-28 11:49:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5521 transitions. [2023-01-28 11:49:08,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3304998503442083 [2023-01-28 11:49:08,518 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5521 transitions. [2023-01-28 11:49:08,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5521 transitions. [2023-01-28 11:49:08,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:49:08,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5521 transitions. [2023-01-28 11:49:08,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 84.93846153846154) internal successors, (5521), 65 states have internal predecessors, (5521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:49:08,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 257.0) internal successors, (16962), 66 states have internal predecessors, (16962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:49:08,529 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 257.0) internal successors, (16962), 66 states have internal predecessors, (16962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:49:08,529 INFO L175 Difference]: Start difference. First operand has 636 places, 777 transitions, 16666 flow. Second operand 65 states and 5521 transitions. [2023-01-28 11:49:08,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1581 transitions, 32962 flow [2023-01-28 11:49:16,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1581 transitions, 31012 flow, removed 685 selfloop flow, removed 148 redundant places. [2023-01-28 11:49:16,269 INFO L231 Difference]: Finished difference. Result has 464 places, 1150 transitions, 28110 flow [2023-01-28 11:49:16,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=15548, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=28110, PETRI_PLACES=464, PETRI_TRANSITIONS=1150} [2023-01-28 11:49:16,269 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 444 predicate places. [2023-01-28 11:49:16,270 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 1150 transitions, 28110 flow [2023-01-28 11:49:16,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 78.6829268292683) internal successors, (3226), 41 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:49:16,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:49:16,270 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:49:16,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-01-28 11:49:16,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:49:16,473 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:49:16,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:49:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1168651819, now seen corresponding path program 20 times [2023-01-28 11:49:16,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:49:16,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126598341] [2023-01-28 11:49:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:49:16,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:49:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:49:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:49:17,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:49:17,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126598341] [2023-01-28 11:49:17,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126598341] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:49:17,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115709992] [2023-01-28 11:49:17,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:49:17,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:49:17,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:49:17,912 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) [2023-01-28 11:49:17,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 11:49:18,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:49:18,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:49:18,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-28 11:49:18,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:49:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:49:18,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:49:19,722 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-28 11:49:19,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 330 [2023-01-28 11:49:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:49:21,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115709992] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:49:21,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:49:21,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 50 [2023-01-28 11:49:21,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250826288] [2023-01-28 11:49:21,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:49:21,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-01-28 11:49:21,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:49:21,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-01-28 11:49:21,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=2195, Unknown=0, NotChecked=0, Total=2652 [2023-01-28 11:49:21,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 11:49:21,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 1150 transitions, 28110 flow. Second operand has 52 states, 52 states have (on average 78.46153846153847) internal successors, (4080), 52 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:49:21,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:49:21,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 11:49:21,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:50:21,637 INFO L130 PetriNetUnfolder]: 31092/57037 cut-off events. [2023-01-28 11:50:21,638 INFO L131 PetriNetUnfolder]: For 3935594/3935594 co-relation queries the response was YES. [2023-01-28 11:50:23,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474471 conditions, 57037 events. 31092/57037 cut-off events. For 3935594/3935594 co-relation queries the response was YES. Maximal size of possible extension queue 2602. Compared 559275 event pairs, 5003 based on Foata normal form. 206/57243 useless extension candidates. Maximal degree in co-relation 474280. Up to 18141 conditions per place. [2023-01-28 11:50:23,270 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 2151 selfloop transitions, 1873 changer transitions 967/4991 dead transitions. [2023-01-28 11:50:23,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 811 places, 4991 transitions, 129067 flow [2023-01-28 11:50:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 348 states. [2023-01-28 11:50:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2023-01-28 11:50:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 29813 transitions. [2023-01-28 11:50:23,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33334451451317143 [2023-01-28 11:50:23,287 INFO L72 ComplementDD]: Start complementDD. Operand 348 states and 29813 transitions. [2023-01-28 11:50:23,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 348 states and 29813 transitions. [2023-01-28 11:50:23,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:50:23,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 348 states and 29813 transitions. [2023-01-28 11:50:23,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 349 states, 348 states have (on average 85.66954022988506) internal successors, (29813), 348 states have internal predecessors, (29813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:50:23,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 349 states, 349 states have (on average 257.0) internal successors, (89693), 349 states have internal predecessors, (89693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:50:23,364 INFO L81 ComplementDD]: Finished complementDD. Result has 349 states, 349 states have (on average 257.0) internal successors, (89693), 349 states have internal predecessors, (89693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:50:23,364 INFO L175 Difference]: Start difference. First operand has 464 places, 1150 transitions, 28110 flow. Second operand 348 states and 29813 transitions. [2023-01-28 11:50:23,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 811 places, 4991 transitions, 129067 flow [2023-01-28 11:50:44,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 4991 transitions, 120475 flow, removed 4152 selfloop flow, removed 16 redundant places. [2023-01-28 11:50:44,793 INFO L231 Difference]: Finished difference. Result has 997 places, 2784 transitions, 90394 flow [2023-01-28 11:50:44,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=25428, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=348, PETRI_FLOW=90394, PETRI_PLACES=997, PETRI_TRANSITIONS=2784} [2023-01-28 11:50:44,794 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 977 predicate places. [2023-01-28 11:50:44,794 INFO L495 AbstractCegarLoop]: Abstraction has has 997 places, 2784 transitions, 90394 flow [2023-01-28 11:50:44,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 78.46153846153847) internal successors, (4080), 52 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:50:44,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:50:44,795 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:50:44,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 11:50:45,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 11:50:45,000 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:50:45,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:50:45,001 INFO L85 PathProgramCache]: Analyzing trace with hash -678070836, now seen corresponding path program 21 times [2023-01-28 11:50:45,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:50:45,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494865168] [2023-01-28 11:50:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:50:45,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:50:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:50:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 11:50:45,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:50:45,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494865168] [2023-01-28 11:50:45,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494865168] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:50:45,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252824556] [2023-01-28 11:50:45,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:50:45,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:50:45,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:50:45,183 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) [2023-01-28 11:50:45,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 11:50:45,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 11:50:45,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:50:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 11:50:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:50:46,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:50:46,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 682 treesize of output 380 [2023-01-28 11:50:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:50:46,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:50:47,736 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-01-28 11:50:47,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 752 treesize of output 452 [2023-01-28 11:50:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:50:47,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252824556] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:50:47,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:50:47,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-01-28 11:50:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530391285] [2023-01-28 11:50:47,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:50:47,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 11:50:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:50:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 11:50:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 11:50:47,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 257 [2023-01-28 11:50:47,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 997 places, 2784 transitions, 90394 flow. Second operand has 33 states, 33 states have (on average 88.63636363636364) internal successors, (2925), 33 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:50:47,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:50:47,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 257 [2023-01-28 11:50:47,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:51:11,799 INFO L130 PetriNetUnfolder]: 13206/24917 cut-off events. [2023-01-28 11:51:11,800 INFO L131 PetriNetUnfolder]: For 3591597/3591603 co-relation queries the response was YES. [2023-01-28 11:51:12,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163846 conditions, 24917 events. 13206/24917 cut-off events. For 3591597/3591603 co-relation queries the response was YES. Maximal size of possible extension queue 1472. Compared 232265 event pairs, 8529 based on Foata normal form. 642/25539 useless extension candidates. Maximal degree in co-relation 163455. Up to 20452 conditions per place. [2023-01-28 11:51:12,535 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 1094 selfloop transitions, 63 changer transitions 93/1256 dead transitions. [2023-01-28 11:51:12,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 1256 transitions, 32209 flow [2023-01-28 11:51:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 11:51:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 11:51:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1767 transitions. [2023-01-28 11:51:12,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36186770428015563 [2023-01-28 11:51:12,543 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1767 transitions. [2023-01-28 11:51:12,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1767 transitions. [2023-01-28 11:51:12,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:51:12,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1767 transitions. [2023-01-28 11:51:12,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 93.0) internal successors, (1767), 19 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:51:12,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:51:12,546 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:51:12,546 INFO L175 Difference]: Start difference. First operand has 997 places, 2784 transitions, 90394 flow. Second operand 19 states and 1767 transitions. [2023-01-28 11:51:12,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 1256 transitions, 32209 flow [2023-01-28 11:51:32,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1256 transitions, 30200 flow, removed 916 selfloop flow, removed 202 redundant places. [2023-01-28 11:51:32,350 INFO L231 Difference]: Finished difference. Result has 505 places, 1104 transitions, 25965 flow [2023-01-28 11:51:32,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=25866, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1050, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=25965, PETRI_PLACES=505, PETRI_TRANSITIONS=1104} [2023-01-28 11:51:32,351 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 485 predicate places. [2023-01-28 11:51:32,351 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 1104 transitions, 25965 flow [2023-01-28 11:51:32,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 88.63636363636364) internal successors, (2925), 33 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:51:32,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:51:32,352 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:51:32,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-28 11:51:32,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-28 11:51:32,557 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:51:32,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:51:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1274363683, now seen corresponding path program 22 times [2023-01-28 11:51:32,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:51:32,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734319515] [2023-01-28 11:51:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:51:32,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:51:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:51:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:51:33,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:51:33,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734319515] [2023-01-28 11:51:33,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734319515] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:51:33,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098418360] [2023-01-28 11:51:33,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:51:33,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:51:33,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:51:33,974 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) [2023-01-28 11:51:33,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 11:51:34,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:51:34,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:51:34,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-28 11:51:34,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:51:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-01-28 11:51:34,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:51:35,289 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-28 11:51:35,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 312 treesize of output 310 [2023-01-28 11:51:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-01-28 11:51:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098418360] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:51:37,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:51:37,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 37 [2023-01-28 11:51:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649135123] [2023-01-28 11:51:37,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:51:37,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 11:51:37,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:51:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 11:51:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2023-01-28 11:51:37,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 11:51:37,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 1104 transitions, 25965 flow. Second operand has 39 states, 39 states have (on average 78.76923076923077) internal successors, (3072), 39 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:51:37,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:51:37,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 11:51:37,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:51:53,060 INFO L130 PetriNetUnfolder]: 14569/27236 cut-off events. [2023-01-28 11:51:53,061 INFO L131 PetriNetUnfolder]: For 946370/946370 co-relation queries the response was YES. [2023-01-28 11:51:53,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166230 conditions, 27236 events. 14569/27236 cut-off events. For 946370/946370 co-relation queries the response was YES. Maximal size of possible extension queue 1614. Compared 252823 event pairs, 3064 based on Foata normal form. 28/27264 useless extension candidates. Maximal degree in co-relation 166020. Up to 11072 conditions per place. [2023-01-28 11:51:53,631 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 725 selfloop transitions, 718 changer transitions 294/1737 dead transitions. [2023-01-28 11:51:53,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1737 transitions, 37302 flow [2023-01-28 11:51:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-01-28 11:51:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-01-28 11:51:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6325 transitions. [2023-01-28 11:51:53,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32814526588845655 [2023-01-28 11:51:53,635 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6325 transitions. [2023-01-28 11:51:53,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6325 transitions. [2023-01-28 11:51:53,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:51:53,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6325 transitions. [2023-01-28 11:51:53,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 84.33333333333333) internal successors, (6325), 75 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:51:53,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 257.0) internal successors, (19532), 76 states have internal predecessors, (19532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:51:53,648 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 257.0) internal successors, (19532), 76 states have internal predecessors, (19532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:51:53,648 INFO L175 Difference]: Start difference. First operand has 505 places, 1104 transitions, 25965 flow. Second operand 75 states and 6325 transitions. [2023-01-28 11:51:53,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1737 transitions, 37302 flow [2023-01-28 11:52:02,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1737 transitions, 36612 flow, removed 305 selfloop flow, removed 30 redundant places. [2023-01-28 11:52:02,764 INFO L231 Difference]: Finished difference. Result has 546 places, 1244 transitions, 31584 flow [2023-01-28 11:52:02,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=25564, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=574, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=31584, PETRI_PLACES=546, PETRI_TRANSITIONS=1244} [2023-01-28 11:52:02,765 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 526 predicate places. [2023-01-28 11:52:02,765 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 1244 transitions, 31584 flow [2023-01-28 11:52:02,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.76923076923077) internal successors, (3072), 39 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:52:02,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:52:02,766 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:52:02,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 11:52:02,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:52:02,971 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:52:02,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:52:02,971 INFO L85 PathProgramCache]: Analyzing trace with hash -609610603, now seen corresponding path program 23 times [2023-01-28 11:52:02,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:52:02,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113129797] [2023-01-28 11:52:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:52:02,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:52:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:52:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:52:04,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:52:04,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113129797] [2023-01-28 11:52:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113129797] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:52:04,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753899197] [2023-01-28 11:52:04,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:52:04,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:52:04,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:52:04,341 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) [2023-01-28 11:52:04,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 11:52:04,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 11:52:04,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:52:04,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 62 conjunts are in the unsatisfiable core [2023-01-28 11:52:04,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:52:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:52:05,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:52:06,203 INFO L321 Elim1Store]: treesize reduction 38, result has 79.0 percent of original size [2023-01-28 11:52:06,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 320 [2023-01-28 11:52:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:52:09,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753899197] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:52:09,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:52:09,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 50 [2023-01-28 11:52:09,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75897190] [2023-01-28 11:52:09,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:52:09,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-01-28 11:52:09,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:52:09,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-01-28 11:52:09,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2175, Unknown=0, NotChecked=0, Total=2652 [2023-01-28 11:52:09,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 11:52:09,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 1244 transitions, 31584 flow. Second operand has 52 states, 52 states have (on average 78.46153846153847) internal successors, (4080), 52 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:52:09,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:52:09,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 11:52:09,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:52:27,159 INFO L130 PetriNetUnfolder]: 14999/27991 cut-off events. [2023-01-28 11:52:27,159 INFO L131 PetriNetUnfolder]: For 889107/889107 co-relation queries the response was YES. [2023-01-28 11:52:27,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179787 conditions, 27991 events. 14999/27991 cut-off events. For 889107/889107 co-relation queries the response was YES. Maximal size of possible extension queue 1771. Compared 263028 event pairs, 5664 based on Foata normal form. 11/28002 useless extension candidates. Maximal degree in co-relation 179580. Up to 21972 conditions per place. [2023-01-28 11:52:27,613 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 1157 selfloop transitions, 251 changer transitions 248/1656 dead transitions. [2023-01-28 11:52:27,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 1656 transitions, 38392 flow [2023-01-28 11:52:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-28 11:52:27,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-28 11:52:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5458 transitions. [2023-01-28 11:52:27,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32672852439389405 [2023-01-28 11:52:27,616 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5458 transitions. [2023-01-28 11:52:27,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5458 transitions. [2023-01-28 11:52:27,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:52:27,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5458 transitions. [2023-01-28 11:52:27,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 83.96923076923076) internal successors, (5458), 65 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:52:27,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 257.0) internal successors, (16962), 66 states have internal predecessors, (16962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:52:27,627 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 257.0) internal successors, (16962), 66 states have internal predecessors, (16962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:52:27,627 INFO L175 Difference]: Start difference. First operand has 546 places, 1244 transitions, 31584 flow. Second operand 65 states and 5458 transitions. [2023-01-28 11:52:27,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 1656 transitions, 38392 flow [2023-01-28 11:52:38,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 1656 transitions, 36822 flow, removed 605 selfloop flow, removed 41 redundant places. [2023-01-28 11:52:39,008 INFO L231 Difference]: Finished difference. Result has 577 places, 1283 transitions, 31892 flow [2023-01-28 11:52:39,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=30016, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=31892, PETRI_PLACES=577, PETRI_TRANSITIONS=1283} [2023-01-28 11:52:39,018 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 557 predicate places. [2023-01-28 11:52:39,019 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 1283 transitions, 31892 flow [2023-01-28 11:52:39,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 78.46153846153847) internal successors, (4080), 52 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:52:39,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:52:39,019 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:52:39,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-28 11:52:39,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:52:39,224 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:52:39,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:52:39,224 INFO L85 PathProgramCache]: Analyzing trace with hash 495799907, now seen corresponding path program 24 times [2023-01-28 11:52:39,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:52:39,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798575225] [2023-01-28 11:52:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:52:39,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:52:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:52:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:52:39,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:52:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798575225] [2023-01-28 11:52:39,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798575225] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:52:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409974336] [2023-01-28 11:52:39,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:52:39,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:52:39,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:52:39,427 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) [2023-01-28 11:52:39,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 11:52:39,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 11:52:39,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:52:39,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 11:52:39,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:52:39,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:52:39,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 362 treesize of output 204 [2023-01-28 11:52:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:52:39,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:52:40,386 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-01-28 11:52:40,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 424 treesize of output 268 [2023-01-28 11:52:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:52:40,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409974336] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:52:40,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:52:40,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 10] total 19 [2023-01-28 11:52:40,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084740187] [2023-01-28 11:52:40,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:52:40,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 11:52:40,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:52:40,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 11:52:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-01-28 11:52:40,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 257 [2023-01-28 11:52:40,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 1283 transitions, 31892 flow. Second operand has 20 states, 20 states have (on average 96.3) internal successors, (1926), 20 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:52:40,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:52:40,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 257 [2023-01-28 11:52:40,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:52:57,882 INFO L130 PetriNetUnfolder]: 19959/37004 cut-off events. [2023-01-28 11:52:57,882 INFO L131 PetriNetUnfolder]: For 1377953/1377953 co-relation queries the response was YES. [2023-01-28 11:52:58,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252319 conditions, 37004 events. 19959/37004 cut-off events. For 1377953/1377953 co-relation queries the response was YES. Maximal size of possible extension queue 2312. Compared 356429 event pairs, 3468 based on Foata normal form. 44/37048 useless extension candidates. Maximal degree in co-relation 252104. Up to 13031 conditions per place. [2023-01-28 11:52:58,570 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 635 selfloop transitions, 1160 changer transitions 5/1800 dead transitions. [2023-01-28 11:52:58,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 1800 transitions, 50074 flow [2023-01-28 11:52:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 11:52:58,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 11:52:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1747 transitions. [2023-01-28 11:52:58,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39986266880292975 [2023-01-28 11:52:58,572 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1747 transitions. [2023-01-28 11:52:58,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1747 transitions. [2023-01-28 11:52:58,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:52:58,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1747 transitions. [2023-01-28 11:52:58,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 102.76470588235294) internal successors, (1747), 17 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:52:58,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:52:58,576 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:52:58,576 INFO L175 Difference]: Start difference. First operand has 577 places, 1283 transitions, 31892 flow. Second operand 17 states and 1747 transitions. [2023-01-28 11:52:58,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 1800 transitions, 50074 flow [2023-01-28 11:53:11,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 1800 transitions, 49195 flow, removed 327 selfloop flow, removed 39 redundant places. [2023-01-28 11:53:11,879 INFO L231 Difference]: Finished difference. Result has 550 places, 1696 transitions, 46465 flow [2023-01-28 11:53:11,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=31152, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=814, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=46465, PETRI_PLACES=550, PETRI_TRANSITIONS=1696} [2023-01-28 11:53:11,880 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 530 predicate places. [2023-01-28 11:53:11,881 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 1696 transitions, 46465 flow [2023-01-28 11:53:11,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 96.3) internal successors, (1926), 20 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:53:11,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:53:11,881 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:53:11,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 11:53:12,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 11:53:12,086 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:53:12,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:53:12,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1904333292, now seen corresponding path program 25 times [2023-01-28 11:53:12,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:53:12,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947940693] [2023-01-28 11:53:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:53:12,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:53:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:53:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:53:13,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:53:13,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947940693] [2023-01-28 11:53:13,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947940693] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:53:13,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776322803] [2023-01-28 11:53:13,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:53:13,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:53:13,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:53:13,580 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) [2023-01-28 11:53:13,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 11:53:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:53:13,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 64 conjunts are in the unsatisfiable core [2023-01-28 11:53:13,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:53:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:53:14,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:53:15,794 INFO L321 Elim1Store]: treesize reduction 38, result has 86.4 percent of original size [2023-01-28 11:53:15,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 380 treesize of output 430 [2023-01-28 11:53:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:53:23,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776322803] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:53:23,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:53:23,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 54 [2023-01-28 11:53:23,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617875493] [2023-01-28 11:53:23,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:53:23,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-01-28 11:53:23,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:53:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-01-28 11:53:23,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=2609, Unknown=0, NotChecked=0, Total=3080 [2023-01-28 11:53:23,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 11:53:23,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 1696 transitions, 46465 flow. Second operand has 56 states, 56 states have (on average 78.39285714285714) internal successors, (4390), 56 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:53:23,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:53:23,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 11:53:23,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 11:53:37,901 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 [2023-01-28 11:53:37,902 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 11:53:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-01-28 11:53:37,973 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 11:53:37,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 11:53:38,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 11:53:38,176 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (56states, 77/257 universal loopers) in iteration 28,while PetriNetUnfolder was constructing finite prefix that currently has 76430 conditions, 12582 events (7061/12581 cut-off events. For 241782/241782 co-relation queries the response was YES. Maximal size of possible extension queue 2105. Compared 114400 event pairs, 2242 based on Foata normal form. 0/14660 useless extension candidates. Maximal degree in co-relation 76217. Up to 8035 conditions per place.). [2023-01-28 11:53:38,190 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 11:53:38,191 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 11:53:38,191 INFO L445 BasicCegarLoop]: Path program histogram: [25, 1, 1, 1] [2023-01-28 11:53:38,196 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 11:53:38,196 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 11:53:38,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 11:53:38 BasicIcfg [2023-01-28 11:53:38,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 11:53:38,204 INFO L158 Benchmark]: Toolchain (without parser) took 804166.51ms. Allocated memory was 809.5MB in the beginning and 14.2GB in the end (delta: 13.4GB). Free memory was 754.0MB in the beginning and 11.6GB in the end (delta: -10.8GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. [2023-01-28 11:53:38,204 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 417.3MB. Free memory is still 365.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 11:53:38,204 INFO L158 Benchmark]: CACSL2BoogieTranslator took 156.26ms. Allocated memory is still 809.5MB. Free memory was 753.7MB in the beginning and 742.1MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 11:53:38,204 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.03ms. Allocated memory is still 809.5MB. Free memory was 742.1MB in the beginning and 740.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:53:38,204 INFO L158 Benchmark]: Boogie Preprocessor took 16.97ms. Allocated memory is still 809.5MB. Free memory was 740.2MB in the beginning and 738.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:53:38,204 INFO L158 Benchmark]: RCFGBuilder took 489.15ms. Allocated memory is still 809.5MB. Free memory was 738.7MB in the beginning and 716.8MB in the end (delta: 21.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-28 11:53:38,205 INFO L158 Benchmark]: TraceAbstraction took 803476.01ms. Allocated memory was 809.5MB in the beginning and 14.2GB in the end (delta: 13.4GB). Free memory was 716.3MB in the beginning and 11.6GB in the end (delta: -10.8GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. [2023-01-28 11:53:38,206 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 417.3MB. Free memory is still 365.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 156.26ms. Allocated memory is still 809.5MB. Free memory was 753.7MB in the beginning and 742.1MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.03ms. Allocated memory is still 809.5MB. Free memory was 742.1MB in the beginning and 740.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.97ms. Allocated memory is still 809.5MB. Free memory was 740.2MB in the beginning and 738.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 489.15ms. Allocated memory is still 809.5MB. Free memory was 738.7MB in the beginning and 716.8MB in the end (delta: 21.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 803476.01ms. Allocated memory was 809.5MB in the beginning and 14.2GB in the end (delta: 13.4GB). Free memory was 716.3MB in the beginning and 11.6GB in the end (delta: -10.8GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 113 PlacesBefore, 20 PlacesAfterwards, 117 TransitionsBefore, 16 TransitionsAfterwards, 792 CoEnabledTransitionPairs, 7 FixpointIterations, 68 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 13 ConcurrentYvCompositions, 8 ChoiceCompositions, 130 TotalNumberOfCompositions, 883 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 869, independent: 860, independent conditional: 0, independent unconditional: 860, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 456, independent: 451, independent conditional: 0, independent unconditional: 451, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 869, independent: 409, independent conditional: 0, independent unconditional: 409, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 456, unknown conditional: 0, unknown unconditional: 456] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (56states, 77/257 universal loopers) in iteration 28,while PetriNetUnfolder was constructing finite prefix that currently has 76430 conditions, 12582 events (7061/12581 cut-off events. For 241782/241782 co-relation queries the response was YES. Maximal size of possible extension queue 2105. Compared 114400 event pairs, 2242 based on Foata normal form. 0/14660 useless extension candidates. Maximal degree in co-relation 76217. Up to 8035 conditions per place.). - TimeoutResultAtElement [Line: 88]: 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 (56states, 77/257 universal loopers) in iteration 28,while PetriNetUnfolder was constructing finite prefix that currently has 76430 conditions, 12582 events (7061/12581 cut-off events. For 241782/241782 co-relation queries the response was YES. Maximal size of possible extension queue 2105. Compared 114400 event pairs, 2242 based on Foata normal form. 0/14660 useless extension candidates. Maximal degree in co-relation 76217. Up to 8035 conditions per place.). - TimeoutResultAtElement [Line: 89]: 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 (56states, 77/257 universal loopers) in iteration 28,while PetriNetUnfolder was constructing finite prefix that currently has 76430 conditions, 12582 events (7061/12581 cut-off events. For 241782/241782 co-relation queries the response was YES. Maximal size of possible extension queue 2105. Compared 114400 event pairs, 2242 based on Foata normal form. 0/14660 useless extension candidates. Maximal degree in co-relation 76217. Up to 8035 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 145 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 803.3s, OverallIterations: 28, TraceHistogramMax: 6, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 659.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 89 mSolverCounterUnknown, 12113 SdHoareTripleChecker+Valid, 37.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12113 mSDsluCounter, 266 SdHoareTripleChecker+Invalid, 32.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 154 IncrementalHoareTripleChecker+Unchecked, 246 mSDsCounter, 1210 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56978 IncrementalHoareTripleChecker+Invalid, 58431 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1210 mSolverCounterUnsat, 20 mSDtfsCounter, 56978 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2701 GetRequests, 598 SyntacticMatches, 18 SemanticMatches, 2085 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 106666 ImplicationChecksByTransitivity, 134.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90394occurred in iteration=23, InterpolantAutomatonStates: 1468, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 130.7s InterpolantComputationTime, 1218 NumberOfCodeBlocks, 1216 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 1728 ConstructedInterpolants, 15 QuantifiedInterpolants, 56900 SizeOfPredicates, 569 NumberOfNonLiveVariables, 5789 ConjunctsInSsa, 1008 ConjunctsInUnsatCore, 78 InterpolantComputations, 3 PerfectInterpolantSequences, 410/1941 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