/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 BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 02:30:45,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 02:30:45,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 02:30:45,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 02:30:45,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 02:30:45,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 02:30:45,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 02:30:45,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 02:30:45,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 02:30:45,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 02:30:45,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 02:30:45,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 02:30:45,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 02:30:45,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 02:30:45,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 02:30:45,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 02:30:45,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 02:30:45,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 02:30:45,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 02:30:45,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 02:30:45,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 02:30:45,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 02:30:45,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 02:30:45,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 02:30:45,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 02:30:45,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 02:30:45,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 02:30:45,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 02:30:45,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 02:30:45,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 02:30:45,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 02:30:45,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 02:30:45,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 02:30:45,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 02:30:45,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 02:30:45,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 02:30:45,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 02:30:45,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 02:30:45,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 02:30:45,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 02:30:45,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 02:30:45,379 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 02:30:45,400 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 02:30:45,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 02:30:45,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 02:30:45,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 02:30:45,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 02:30:45,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 02:30:45,401 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 02:30:45,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 02:30:45,402 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 02:30:45,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 02:30:45,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 02:30:45,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 02:30:45,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 02:30:45,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 02:30:45,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 02:30:45,403 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 02:30:45,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 02:30:45,403 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 02:30:45,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 02:30:45,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 02:30:45,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 02:30:45,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 02:30:45,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 02:30:45,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:30:45,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 02:30:45,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 02:30:45,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 02:30:45,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 02:30:45,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 02:30:45,404 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 02:30:45,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 02:30:45,404 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 02:30:45,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 02:30:45,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 02:30:45,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 02:30:45,601 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 02:30:45,601 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 02:30:45,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-01-28 02:30:46,434 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 02:30:46,626 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 02:30:46,626 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-01-28 02:30:46,632 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b865f195c/e94879c273e545bc882433a817f6d114/FLAG9660247d3 [2023-01-28 02:30:46,646 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b865f195c/e94879c273e545bc882433a817f6d114 [2023-01-28 02:30:46,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 02:30:46,648 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 02:30:46,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 02:30:46,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 02:30:46,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 02:30:46,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630cf3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46, skipping insertion in model container [2023-01-28 02:30:46,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 02:30:46,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 02:30:46,784 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/chl-array-int-subst.wvr.c[2781,2794] [2023-01-28 02:30:46,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:30:46,796 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 02:30:46,811 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/chl-array-int-subst.wvr.c[2781,2794] [2023-01-28 02:30:46,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:30:46,823 INFO L208 MainTranslator]: Completed translation [2023-01-28 02:30:46,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46 WrapperNode [2023-01-28 02:30:46,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 02:30:46,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 02:30:46,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 02:30:46,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 02:30:46,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,854 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 287 [2023-01-28 02:30:46,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 02:30:46,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 02:30:46,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 02:30:46,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 02:30:46,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,878 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 02:30:46,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 02:30:46,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 02:30:46,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 02:30:46,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (1/1) ... [2023-01-28 02:30:46,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:30:46,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:30:46,905 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 02:30:46,909 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 02:30:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 02:30:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 02:30:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 02:30:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 02:30:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 02:30:46,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 02:30:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 02:30:46,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 02:30:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 02:30:46,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 02:30:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 02:30:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 02:30:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 02:30:46,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 02:30:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 02:30:46,928 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 02:30:47,001 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 02:30:47,002 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 02:30:47,320 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 02:30:47,336 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 02:30:47,337 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-28 02:30:47,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:30:47 BoogieIcfgContainer [2023-01-28 02:30:47,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 02:30:47,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 02:30:47,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 02:30:47,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 02:30:47,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 02:30:46" (1/3) ... [2023-01-28 02:30:47,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64190006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:30:47, skipping insertion in model container [2023-01-28 02:30:47,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:30:46" (2/3) ... [2023-01-28 02:30:47,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64190006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:30:47, skipping insertion in model container [2023-01-28 02:30:47,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:30:47" (3/3) ... [2023-01-28 02:30:47,343 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2023-01-28 02:30:47,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 02:30:47,358 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 02:30:47,358 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 02:30:47,461 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 02:30:47,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 324 transitions, 672 flow [2023-01-28 02:30:47,563 INFO L130 PetriNetUnfolder]: 29/321 cut-off events. [2023-01-28 02:30:47,563 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 02:30:47,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 321 events. 29/321 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 505 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 245. Up to 3 conditions per place. [2023-01-28 02:30:47,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 324 transitions, 672 flow [2023-01-28 02:30:47,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 311 transitions, 640 flow [2023-01-28 02:30:47,581 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 02:30:47,587 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 292 places, 311 transitions, 640 flow [2023-01-28 02:30:47,589 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 292 places, 311 transitions, 640 flow [2023-01-28 02:30:47,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 311 transitions, 640 flow [2023-01-28 02:30:47,688 INFO L130 PetriNetUnfolder]: 29/311 cut-off events. [2023-01-28 02:30:47,688 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 02:30:47,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 311 events. 29/311 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 504 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 245. Up to 3 conditions per place. [2023-01-28 02:30:47,696 INFO L119 LiptonReduction]: Number of co-enabled transitions 14784 [2023-01-28 02:30:54,650 INFO L134 LiptonReduction]: Checked pairs total: 16261 [2023-01-28 02:30:54,651 INFO L136 LiptonReduction]: Total number of compositions: 353 [2023-01-28 02:30:54,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 02:30:54,667 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;@24e43573, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 02:30:54,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 02:30:54,672 INFO L130 PetriNetUnfolder]: 8/35 cut-off events. [2023-01-28 02:30:54,672 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 02:30:54,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:30:54,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:30:54,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:30:54,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:30:54,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1811737217, now seen corresponding path program 1 times [2023-01-28 02:30:54,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:30:54,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156885487] [2023-01-28 02:30:54,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:30:54,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:30:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:30:55,641 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 02:30:55,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:30:55,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156885487] [2023-01-28 02:30:55,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156885487] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:30:55,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:30:55,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 02:30:55,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074756372] [2023-01-28 02:30:55,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:30:55,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:30:55,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:30:55,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:30:55,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-01-28 02:30:55,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 677 [2023-01-28 02:30:55,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 90 flow. Second operand has 9 states, 9 states have (on average 236.44444444444446) internal successors, (2128), 9 states have internal predecessors, (2128), 0 states have call successors, (0), 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 02:30:55,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:30:55,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 677 [2023-01-28 02:30:55,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:30:56,320 INFO L130 PetriNetUnfolder]: 1997/2838 cut-off events. [2023-01-28 02:30:56,320 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2023-01-28 02:30:56,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5910 conditions, 2838 events. 1997/2838 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11887 event pairs, 166 based on Foata normal form. 1/2235 useless extension candidates. Maximal degree in co-relation 2936. Up to 1149 conditions per place. [2023-01-28 02:30:56,329 INFO L137 encePairwiseOnDemand]: 665/677 looper letters, 118 selfloop transitions, 14 changer transitions 4/136 dead transitions. [2023-01-28 02:30:56,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 136 transitions, 607 flow [2023-01-28 02:30:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:30:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:30:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2479 transitions. [2023-01-28 02:30:56,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3661742983751846 [2023-01-28 02:30:56,347 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2479 transitions. [2023-01-28 02:30:56,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2479 transitions. [2023-01-28 02:30:56,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:30:56,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2479 transitions. [2023-01-28 02:30:56,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 247.9) internal successors, (2479), 10 states have internal predecessors, (2479), 0 states have call successors, (0), 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 02:30:56,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 677.0) internal successors, (7447), 11 states have internal predecessors, (7447), 0 states have call successors, (0), 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 02:30:56,371 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 677.0) internal successors, (7447), 11 states have internal predecessors, (7447), 0 states have call successors, (0), 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 02:30:56,373 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 90 flow. Second operand 10 states and 2479 transitions. [2023-01-28 02:30:56,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 136 transitions, 607 flow [2023-01-28 02:30:56,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 136 transitions, 565 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 02:30:56,380 INFO L231 Difference]: Finished difference. Result has 46 places, 49 transitions, 171 flow [2023-01-28 02:30:56,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=171, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2023-01-28 02:30:56,385 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-01-28 02:30:56,386 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 171 flow [2023-01-28 02:30:56,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 236.44444444444446) internal successors, (2128), 9 states have internal predecessors, (2128), 0 states have call successors, (0), 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 02:30:56,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:30:56,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:30:56,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 02:30:56,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:30:56,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:30:56,389 INFO L85 PathProgramCache]: Analyzing trace with hash 606335977, now seen corresponding path program 2 times [2023-01-28 02:30:56,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:30:56,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613443594] [2023-01-28 02:30:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:30:56,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:30:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:30:56,953 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 02:30:56,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:30:56,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613443594] [2023-01-28 02:30:56,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613443594] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:30:56,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:30:56,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 02:30:56,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783792247] [2023-01-28 02:30:56,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:30:56,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:30:56,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:30:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:30:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-01-28 02:30:56,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 677 [2023-01-28 02:30:56,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 171 flow. Second operand has 9 states, 9 states have (on average 236.44444444444446) internal successors, (2128), 9 states have internal predecessors, (2128), 0 states have call successors, (0), 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 02:30:56,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:30:56,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 677 [2023-01-28 02:30:56,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:30:57,503 INFO L130 PetriNetUnfolder]: 2067/2969 cut-off events. [2023-01-28 02:30:57,503 INFO L131 PetriNetUnfolder]: For 672/672 co-relation queries the response was YES. [2023-01-28 02:30:57,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6719 conditions, 2969 events. 2067/2969 cut-off events. For 672/672 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12863 event pairs, 168 based on Foata normal form. 1/2438 useless extension candidates. Maximal degree in co-relation 6694. Up to 1149 conditions per place. [2023-01-28 02:30:57,514 INFO L137 encePairwiseOnDemand]: 666/677 looper letters, 112 selfloop transitions, 16 changer transitions 8/136 dead transitions. [2023-01-28 02:30:57,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 136 transitions, 643 flow [2023-01-28 02:30:57,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:30:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:30:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2476 transitions. [2023-01-28 02:30:57,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3657311669128508 [2023-01-28 02:30:57,519 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2476 transitions. [2023-01-28 02:30:57,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2476 transitions. [2023-01-28 02:30:57,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:30:57,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2476 transitions. [2023-01-28 02:30:57,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 247.6) internal successors, (2476), 10 states have internal predecessors, (2476), 0 states have call successors, (0), 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 02:30:57,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 677.0) internal successors, (7447), 11 states have internal predecessors, (7447), 0 states have call successors, (0), 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 02:30:57,532 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 677.0) internal successors, (7447), 11 states have internal predecessors, (7447), 0 states have call successors, (0), 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 02:30:57,532 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 171 flow. Second operand 10 states and 2476 transitions. [2023-01-28 02:30:57,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 136 transitions, 643 flow [2023-01-28 02:30:57,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 136 transitions, 637 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-01-28 02:30:57,539 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 223 flow [2023-01-28 02:30:57,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=223, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-01-28 02:30:57,540 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-01-28 02:30:57,540 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 223 flow [2023-01-28 02:30:57,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 236.44444444444446) internal successors, (2128), 9 states have internal predecessors, (2128), 0 states have call successors, (0), 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 02:30:57,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:30:57,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:30:57,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 02:30:57,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:30:57,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:30:57,543 INFO L85 PathProgramCache]: Analyzing trace with hash 235386122, now seen corresponding path program 1 times [2023-01-28 02:30:57,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:30:57,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566246314] [2023-01-28 02:30:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:30:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:30:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:30:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:30:57,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:30:57,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566246314] [2023-01-28 02:30:57,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566246314] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:30:57,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481190319] [2023-01-28 02:30:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:30:57,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:30:57,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:30:57,920 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 02:30:57,923 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 02:30:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:30:58,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-28 02:30:58,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:30:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:30:58,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:30:58,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:30:58,601 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 185 treesize of output 165 [2023-01-28 02:30:58,882 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 02:30:58,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481190319] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:30:58,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:30:58,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 19 [2023-01-28 02:30:58,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47130155] [2023-01-28 02:30:58,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:30:58,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:30:58,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:30:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:30:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-01-28 02:30:58,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 677 [2023-01-28 02:30:58,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 223 flow. Second operand has 9 states, 9 states have (on average 236.55555555555554) internal successors, (2129), 9 states have internal predecessors, (2129), 0 states have call successors, (0), 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 02:30:58,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:30:58,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 677 [2023-01-28 02:30:58,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:30:59,643 INFO L130 PetriNetUnfolder]: 3352/4807 cut-off events. [2023-01-28 02:30:59,643 INFO L131 PetriNetUnfolder]: For 2315/2315 co-relation queries the response was YES. [2023-01-28 02:30:59,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11509 conditions, 4807 events. 3352/4807 cut-off events. For 2315/2315 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22752 event pairs, 397 based on Foata normal form. 73/4028 useless extension candidates. Maximal degree in co-relation 9978. Up to 1658 conditions per place. [2023-01-28 02:30:59,660 INFO L137 encePairwiseOnDemand]: 665/677 looper letters, 163 selfloop transitions, 17 changer transitions 5/185 dead transitions. [2023-01-28 02:30:59,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 185 transitions, 930 flow [2023-01-28 02:30:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:30:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:30:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3226 transitions. [2023-01-28 02:30:59,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3665492557663902 [2023-01-28 02:30:59,667 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3226 transitions. [2023-01-28 02:30:59,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3226 transitions. [2023-01-28 02:30:59,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:30:59,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3226 transitions. [2023-01-28 02:30:59,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 248.15384615384616) internal successors, (3226), 13 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 02:30:59,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 677.0) internal successors, (9478), 14 states have internal predecessors, (9478), 0 states have call successors, (0), 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 02:30:59,681 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 677.0) internal successors, (9478), 14 states have internal predecessors, (9478), 0 states have call successors, (0), 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 02:30:59,681 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 223 flow. Second operand 13 states and 3226 transitions. [2023-01-28 02:30:59,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 185 transitions, 930 flow [2023-01-28 02:30:59,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 185 transitions, 909 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-01-28 02:30:59,696 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 297 flow [2023-01-28 02:30:59,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=297, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-01-28 02:30:59,697 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-01-28 02:30:59,698 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 297 flow [2023-01-28 02:30:59,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 236.55555555555554) internal successors, (2129), 9 states have internal predecessors, (2129), 0 states have call successors, (0), 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 02:30:59,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:30:59,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:30:59,707 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 02:30:59,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:30:59,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:30:59,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:30:59,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1647439045, now seen corresponding path program 1 times [2023-01-28 02:30:59,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:30:59,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094068591] [2023-01-28 02:30:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:30:59,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:30:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:00,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:00,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094068591] [2023-01-28 02:31:00,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094068591] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:00,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384709510] [2023-01-28 02:31:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:00,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:00,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:00,022 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 02:31:00,024 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 02:31:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:00,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 02:31:00,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:00,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:00,234 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 02:31:00,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384709510] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:00,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:31:00,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-01-28 02:31:00,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520379] [2023-01-28 02:31:00,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:00,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 02:31:00,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 02:31:00,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-01-28 02:31:00,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 677 [2023-01-28 02:31:00,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 249.28571428571428) internal successors, (1745), 7 states have internal predecessors, (1745), 0 states have call successors, (0), 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 02:31:00,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:00,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 677 [2023-01-28 02:31:00,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:00,929 INFO L130 PetriNetUnfolder]: 5270/7512 cut-off events. [2023-01-28 02:31:00,929 INFO L131 PetriNetUnfolder]: For 6560/6560 co-relation queries the response was YES. [2023-01-28 02:31:00,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19545 conditions, 7512 events. 5270/7512 cut-off events. For 6560/6560 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 37182 event pairs, 3093 based on Foata normal form. 1/6217 useless extension candidates. Maximal degree in co-relation 18023. Up to 4796 conditions per place. [2023-01-28 02:31:00,964 INFO L137 encePairwiseOnDemand]: 668/677 looper letters, 134 selfloop transitions, 11 changer transitions 6/151 dead transitions. [2023-01-28 02:31:00,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 151 transitions, 924 flow [2023-01-28 02:31:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 02:31:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 02:31:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1847 transitions. [2023-01-28 02:31:00,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38974467187170286 [2023-01-28 02:31:00,967 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1847 transitions. [2023-01-28 02:31:00,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1847 transitions. [2023-01-28 02:31:00,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:00,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1847 transitions. [2023-01-28 02:31:00,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 263.85714285714283) internal successors, (1847), 7 states have internal predecessors, (1847), 0 states have call successors, (0), 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 02:31:00,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 677.0) internal successors, (5416), 8 states have internal predecessors, (5416), 0 states have call successors, (0), 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 02:31:00,975 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 677.0) internal successors, (5416), 8 states have internal predecessors, (5416), 0 states have call successors, (0), 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 02:31:00,975 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 297 flow. Second operand 7 states and 1847 transitions. [2023-01-28 02:31:00,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 151 transitions, 924 flow [2023-01-28 02:31:01,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 151 transitions, 873 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-01-28 02:31:01,007 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 330 flow [2023-01-28 02:31:01,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2023-01-28 02:31:01,009 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-01-28 02:31:01,009 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 330 flow [2023-01-28 02:31:01,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 249.28571428571428) internal successors, (1745), 7 states have internal predecessors, (1745), 0 states have call successors, (0), 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 02:31:01,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:01,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:01,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:01,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-01-28 02:31:01,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:01,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2003328084, now seen corresponding path program 1 times [2023-01-28 02:31:01,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:01,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080979932] [2023-01-28 02:31:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:01,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:01,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:01,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080979932] [2023-01-28 02:31:01,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080979932] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:01,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145407395] [2023-01-28 02:31:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:01,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:01,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:01,309 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 02:31:01,311 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 02:31:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:01,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 02:31:01,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:01,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:01,488 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 02:31:01,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145407395] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:01,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:31:01,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2023-01-28 02:31:01,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545427023] [2023-01-28 02:31:01,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:01,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 02:31:01,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 02:31:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-01-28 02:31:01,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 677 [2023-01-28 02:31:01,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 249.83333333333334) internal successors, (1499), 6 states have internal predecessors, (1499), 0 states have call successors, (0), 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 02:31:01,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:01,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 677 [2023-01-28 02:31:01,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:02,170 INFO L130 PetriNetUnfolder]: 5428/7763 cut-off events. [2023-01-28 02:31:02,170 INFO L131 PetriNetUnfolder]: For 6141/6141 co-relation queries the response was YES. [2023-01-28 02:31:02,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20447 conditions, 7763 events. 5428/7763 cut-off events. For 6141/6141 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38922 event pairs, 3239 based on Foata normal form. 1/6442 useless extension candidates. Maximal degree in co-relation 18869. Up to 4536 conditions per place. [2023-01-28 02:31:02,196 INFO L137 encePairwiseOnDemand]: 667/677 looper letters, 127 selfloop transitions, 11 changer transitions 7/145 dead transitions. [2023-01-28 02:31:02,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 145 transitions, 881 flow [2023-01-28 02:31:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 02:31:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 02:31:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1846 transitions. [2023-01-28 02:31:02,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953365688963915 [2023-01-28 02:31:02,199 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1846 transitions. [2023-01-28 02:31:02,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1846 transitions. [2023-01-28 02:31:02,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:02,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1846 transitions. [2023-01-28 02:31:02,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 263.7142857142857) internal successors, (1846), 7 states have internal predecessors, (1846), 0 states have call successors, (0), 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 02:31:02,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 677.0) internal successors, (5416), 8 states have internal predecessors, (5416), 0 states have call successors, (0), 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 02:31:02,207 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 677.0) internal successors, (5416), 8 states have internal predecessors, (5416), 0 states have call successors, (0), 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 02:31:02,207 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 330 flow. Second operand 7 states and 1846 transitions. [2023-01-28 02:31:02,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 145 transitions, 881 flow [2023-01-28 02:31:02,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 145 transitions, 869 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 02:31:02,242 INFO L231 Difference]: Finished difference. Result has 79 places, 66 transitions, 359 flow [2023-01-28 02:31:02,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=359, PETRI_PLACES=79, PETRI_TRANSITIONS=66} [2023-01-28 02:31:02,243 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-01-28 02:31:02,244 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 66 transitions, 359 flow [2023-01-28 02:31:02,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 249.83333333333334) internal successors, (1499), 6 states have internal predecessors, (1499), 0 states have call successors, (0), 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 02:31:02,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:02,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:02,259 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 02:31:02,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:02,459 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:02,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash -105723106, now seen corresponding path program 2 times [2023-01-28 02:31:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:02,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616377743] [2023-01-28 02:31:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:02,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:02,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:02,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616377743] [2023-01-28 02:31:02,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616377743] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:02,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875881302] [2023-01-28 02:31:02,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:31:02,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:02,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:02,779 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 02:31:02,781 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 02:31:02,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 02:31:02,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 02:31:02,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:03,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:03,129 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 126 treesize of output 107 [2023-01-28 02:31:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:03,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:03,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875881302] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:03,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:03,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-01-28 02:31:03,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429162349] [2023-01-28 02:31:03,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:03,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:31:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:03,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:31:03,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-01-28 02:31:03,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 677 [2023-01-28 02:31:03,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 359 flow. Second operand has 9 states, 9 states have (on average 233.55555555555554) internal successors, (2102), 9 states have internal predecessors, (2102), 0 states have call successors, (0), 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 02:31:03,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:03,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 677 [2023-01-28 02:31:03,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:04,308 INFO L130 PetriNetUnfolder]: 7122/10386 cut-off events. [2023-01-28 02:31:04,309 INFO L131 PetriNetUnfolder]: For 9452/9452 co-relation queries the response was YES. [2023-01-28 02:31:04,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27410 conditions, 10386 events. 7122/10386 cut-off events. For 9452/9452 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 57636 event pairs, 1750 based on Foata normal form. 89/8681 useless extension candidates. Maximal degree in co-relation 24358. Up to 4154 conditions per place. [2023-01-28 02:31:04,345 INFO L137 encePairwiseOnDemand]: 664/677 looper letters, 229 selfloop transitions, 35 changer transitions 11/275 dead transitions. [2023-01-28 02:31:04,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 275 transitions, 1632 flow [2023-01-28 02:31:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 02:31:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 02:31:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3714 transitions. [2023-01-28 02:31:04,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3657311669128508 [2023-01-28 02:31:04,351 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3714 transitions. [2023-01-28 02:31:04,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3714 transitions. [2023-01-28 02:31:04,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:04,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3714 transitions. [2023-01-28 02:31:04,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 247.6) internal successors, (3714), 15 states have internal predecessors, (3714), 0 states have call successors, (0), 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 02:31:04,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 677.0) internal successors, (10832), 16 states have internal predecessors, (10832), 0 states have call successors, (0), 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 02:31:04,365 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 677.0) internal successors, (10832), 16 states have internal predecessors, (10832), 0 states have call successors, (0), 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 02:31:04,365 INFO L175 Difference]: Start difference. First operand has 79 places, 66 transitions, 359 flow. Second operand 15 states and 3714 transitions. [2023-01-28 02:31:04,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 275 transitions, 1632 flow [2023-01-28 02:31:04,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 275 transitions, 1616 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 02:31:04,400 INFO L231 Difference]: Finished difference. Result has 100 places, 95 transitions, 692 flow [2023-01-28 02:31:04,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=692, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2023-01-28 02:31:04,400 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 62 predicate places. [2023-01-28 02:31:04,400 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 692 flow [2023-01-28 02:31:04,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 233.55555555555554) internal successors, (2102), 9 states have internal predecessors, (2102), 0 states have call successors, (0), 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 02:31:04,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:04,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:04,409 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 02:31:04,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:04,605 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:04,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash -964485474, now seen corresponding path program 3 times [2023-01-28 02:31:04,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:04,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371755551] [2023-01-28 02:31:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:04,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:04,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:04,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371755551] [2023-01-28 02:31:04,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371755551] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:04,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449813053] [2023-01-28 02:31:04,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:31:04,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:04,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:04,918 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 02:31:04,920 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 02:31:05,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-28 02:31:05,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:05,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 02:31:05,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:05,185 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:05,185 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 126 treesize of output 107 [2023-01-28 02:31:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:05,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:05,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449813053] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:05,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:05,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-01-28 02:31:05,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864583029] [2023-01-28 02:31:05,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:05,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:31:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:31:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-01-28 02:31:05,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 677 [2023-01-28 02:31:05,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 692 flow. Second operand has 9 states, 9 states have (on average 233.55555555555554) internal successors, (2102), 9 states have internal predecessors, (2102), 0 states have call successors, (0), 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 02:31:05,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:05,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 677 [2023-01-28 02:31:05,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:06,634 INFO L130 PetriNetUnfolder]: 7540/11054 cut-off events. [2023-01-28 02:31:06,634 INFO L131 PetriNetUnfolder]: For 19752/19752 co-relation queries the response was YES. [2023-01-28 02:31:06,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31460 conditions, 11054 events. 7540/11054 cut-off events. For 19752/19752 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 62045 event pairs, 1762 based on Foata normal form. 197/9281 useless extension candidates. Maximal degree in co-relation 29815. Up to 4154 conditions per place. [2023-01-28 02:31:06,673 INFO L137 encePairwiseOnDemand]: 664/677 looper letters, 212 selfloop transitions, 43 changer transitions 15/270 dead transitions. [2023-01-28 02:31:06,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 270 transitions, 1755 flow [2023-01-28 02:31:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 02:31:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 02:31:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3710 transitions. [2023-01-28 02:31:06,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36533727227966517 [2023-01-28 02:31:06,680 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3710 transitions. [2023-01-28 02:31:06,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3710 transitions. [2023-01-28 02:31:06,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:06,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3710 transitions. [2023-01-28 02:31:06,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 247.33333333333334) internal successors, (3710), 15 states have internal predecessors, (3710), 0 states have call successors, (0), 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 02:31:06,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 677.0) internal successors, (10832), 16 states have internal predecessors, (10832), 0 states have call successors, (0), 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 02:31:06,694 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 677.0) internal successors, (10832), 16 states have internal predecessors, (10832), 0 states have call successors, (0), 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 02:31:06,695 INFO L175 Difference]: Start difference. First operand has 100 places, 95 transitions, 692 flow. Second operand 15 states and 3710 transitions. [2023-01-28 02:31:06,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 270 transitions, 1755 flow [2023-01-28 02:31:06,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 270 transitions, 1705 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-01-28 02:31:06,774 INFO L231 Difference]: Finished difference. Result has 118 places, 103 transitions, 869 flow [2023-01-28 02:31:06,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=869, PETRI_PLACES=118, PETRI_TRANSITIONS=103} [2023-01-28 02:31:06,775 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-01-28 02:31:06,775 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 103 transitions, 869 flow [2023-01-28 02:31:06,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 233.55555555555554) internal successors, (2102), 9 states have internal predecessors, (2102), 0 states have call successors, (0), 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 02:31:06,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:06,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:06,787 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 02:31:06,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:06,987 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:06,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:06,988 INFO L85 PathProgramCache]: Analyzing trace with hash 927259102, now seen corresponding path program 4 times [2023-01-28 02:31:06,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:06,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843396461] [2023-01-28 02:31:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:06,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:07,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:07,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843396461] [2023-01-28 02:31:07,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843396461] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:07,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185661881] [2023-01-28 02:31:07,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:31:07,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:07,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:07,468 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 02:31:07,470 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 02:31:07,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:31:07,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:07,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 02:31:07,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:07,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:07,748 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 137 treesize of output 134 [2023-01-28 02:31:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:08,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:08,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:08,528 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 185 treesize of output 165 [2023-01-28 02:31:08,655 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 02:31:08,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185661881] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:08,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:31:08,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-01-28 02:31:08,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461601888] [2023-01-28 02:31:08,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:08,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:31:08,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:08,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:31:08,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-01-28 02:31:08,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 677 [2023-01-28 02:31:08,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 103 transitions, 869 flow. Second operand has 9 states, 9 states have (on average 226.55555555555554) internal successors, (2039), 9 states have internal predecessors, (2039), 0 states have call successors, (0), 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 02:31:08,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:08,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 677 [2023-01-28 02:31:08,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:11,408 INFO L130 PetriNetUnfolder]: 18154/26002 cut-off events. [2023-01-28 02:31:11,408 INFO L131 PetriNetUnfolder]: For 80076/80076 co-relation queries the response was YES. [2023-01-28 02:31:11,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81060 conditions, 26002 events. 18154/26002 cut-off events. For 80076/80076 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 160797 event pairs, 1836 based on Foata normal form. 2/21398 useless extension candidates. Maximal degree in co-relation 78458. Up to 8287 conditions per place. [2023-01-28 02:31:11,571 INFO L137 encePairwiseOnDemand]: 664/677 looper letters, 221 selfloop transitions, 120 changer transitions 1/342 dead transitions. [2023-01-28 02:31:11,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 342 transitions, 2871 flow [2023-01-28 02:31:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 02:31:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 02:31:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3344 transitions. [2023-01-28 02:31:11,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35281705001055075 [2023-01-28 02:31:11,580 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3344 transitions. [2023-01-28 02:31:11,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3344 transitions. [2023-01-28 02:31:11,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:11,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3344 transitions. [2023-01-28 02:31:11,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 238.85714285714286) internal successors, (3344), 14 states have internal predecessors, (3344), 0 states have call successors, (0), 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 02:31:11,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 677.0) internal successors, (10155), 15 states have internal predecessors, (10155), 0 states have call successors, (0), 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 02:31:11,593 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 677.0) internal successors, (10155), 15 states have internal predecessors, (10155), 0 states have call successors, (0), 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 02:31:11,594 INFO L175 Difference]: Start difference. First operand has 118 places, 103 transitions, 869 flow. Second operand 14 states and 3344 transitions. [2023-01-28 02:31:11,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 342 transitions, 2871 flow [2023-01-28 02:31:12,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 342 transitions, 2738 flow, removed 35 selfloop flow, removed 8 redundant places. [2023-01-28 02:31:12,305 INFO L231 Difference]: Finished difference. Result has 131 places, 211 transitions, 2108 flow [2023-01-28 02:31:12,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2108, PETRI_PLACES=131, PETRI_TRANSITIONS=211} [2023-01-28 02:31:12,306 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 93 predicate places. [2023-01-28 02:31:12,306 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 211 transitions, 2108 flow [2023-01-28 02:31:12,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 226.55555555555554) internal successors, (2039), 9 states have internal predecessors, (2039), 0 states have call successors, (0), 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 02:31:12,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:12,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:12,311 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 02:31:12,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:12,512 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:12,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:12,512 INFO L85 PathProgramCache]: Analyzing trace with hash 158436876, now seen corresponding path program 5 times [2023-01-28 02:31:12,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:12,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090181605] [2023-01-28 02:31:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:12,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:12,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:12,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090181605] [2023-01-28 02:31:12,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090181605] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:12,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075142341] [2023-01-28 02:31:12,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:31:12,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:12,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:12,801 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 02:31:12,803 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 02:31:12,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:31:12,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:12,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 02:31:12,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:13,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:13,202 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 160 treesize of output 141 [2023-01-28 02:31:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:13,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:13,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:13,616 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 185 treesize of output 165 [2023-01-28 02:31:13,827 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 02:31:13,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075142341] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:13,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:31:13,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 19 [2023-01-28 02:31:13,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282855285] [2023-01-28 02:31:13,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:13,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:31:13,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:13,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:31:13,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-01-28 02:31:13,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 677 [2023-01-28 02:31:13,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 211 transitions, 2108 flow. Second operand has 9 states, 9 states have (on average 236.55555555555554) internal successors, (2129), 9 states have internal predecessors, (2129), 0 states have call successors, (0), 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 02:31:13,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:13,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 677 [2023-01-28 02:31:13,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:16,879 INFO L130 PetriNetUnfolder]: 18154/25999 cut-off events. [2023-01-28 02:31:16,879 INFO L131 PetriNetUnfolder]: For 97010/97010 co-relation queries the response was YES. [2023-01-28 02:31:16,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98170 conditions, 25999 events. 18154/25999 cut-off events. For 97010/97010 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 160461 event pairs, 3176 based on Foata normal form. 3/23918 useless extension candidates. Maximal degree in co-relation 96574. Up to 14851 conditions per place. [2023-01-28 02:31:17,010 INFO L137 encePairwiseOnDemand]: 666/677 looper letters, 298 selfloop transitions, 42 changer transitions 10/350 dead transitions. [2023-01-28 02:31:17,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 350 transitions, 3372 flow [2023-01-28 02:31:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:31:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:31:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3223 transitions. [2023-01-28 02:31:17,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3662083854107488 [2023-01-28 02:31:17,015 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3223 transitions. [2023-01-28 02:31:17,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3223 transitions. [2023-01-28 02:31:17,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:17,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3223 transitions. [2023-01-28 02:31:17,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 247.92307692307693) internal successors, (3223), 13 states have internal predecessors, (3223), 0 states have call successors, (0), 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 02:31:17,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 677.0) internal successors, (9478), 14 states have internal predecessors, (9478), 0 states have call successors, (0), 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 02:31:17,026 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 677.0) internal successors, (9478), 14 states have internal predecessors, (9478), 0 states have call successors, (0), 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 02:31:17,026 INFO L175 Difference]: Start difference. First operand has 131 places, 211 transitions, 2108 flow. Second operand 13 states and 3223 transitions. [2023-01-28 02:31:17,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 350 transitions, 3372 flow [2023-01-28 02:31:18,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 350 transitions, 3315 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-01-28 02:31:18,088 INFO L231 Difference]: Finished difference. Result has 142 places, 210 transitions, 2136 flow [2023-01-28 02:31:18,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2136, PETRI_PLACES=142, PETRI_TRANSITIONS=210} [2023-01-28 02:31:18,089 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 104 predicate places. [2023-01-28 02:31:18,089 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 210 transitions, 2136 flow [2023-01-28 02:31:18,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 236.55555555555554) internal successors, (2129), 9 states have internal predecessors, (2129), 0 states have call successors, (0), 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 02:31:18,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:18,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:18,096 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 02:31:18,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:18,294 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:18,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash -671402008, now seen corresponding path program 1 times [2023-01-28 02:31:18,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:18,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741297782] [2023-01-28 02:31:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:18,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:18,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741297782] [2023-01-28 02:31:18,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741297782] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:18,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479535689] [2023-01-28 02:31:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:18,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:18,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:18,388 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 02:31:18,390 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 02:31:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 02:31:18,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:18,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:18,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479535689] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:18,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:31:18,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 6] total 12 [2023-01-28 02:31:18,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276438081] [2023-01-28 02:31:18,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:18,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 02:31:18,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:18,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 02:31:18,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-01-28 02:31:18,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 677 [2023-01-28 02:31:18,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 210 transitions, 2136 flow. Second operand has 7 states, 7 states have (on average 245.42857142857142) internal successors, (1718), 7 states have internal predecessors, (1718), 0 states have call successors, (0), 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 02:31:18,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:18,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 677 [2023-01-28 02:31:18,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:21,235 INFO L130 PetriNetUnfolder]: 19128/27437 cut-off events. [2023-01-28 02:31:21,235 INFO L131 PetriNetUnfolder]: For 109142/109142 co-relation queries the response was YES. [2023-01-28 02:31:21,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102922 conditions, 27437 events. 19128/27437 cut-off events. For 109142/109142 co-relation queries the response was YES. Maximal size of possible extension queue 1203. Compared 173177 event pairs, 4872 based on Foata normal form. 0/25353 useless extension candidates. Maximal degree in co-relation 101271. Up to 8897 conditions per place. [2023-01-28 02:31:21,381 INFO L137 encePairwiseOnDemand]: 667/677 looper letters, 486 selfloop transitions, 24 changer transitions 6/516 dead transitions. [2023-01-28 02:31:21,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 516 transitions, 5474 flow [2023-01-28 02:31:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:31:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:31:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2588 transitions. [2023-01-28 02:31:21,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382274741506647 [2023-01-28 02:31:21,384 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2588 transitions. [2023-01-28 02:31:21,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2588 transitions. [2023-01-28 02:31:21,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:21,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2588 transitions. [2023-01-28 02:31:21,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 258.8) internal successors, (2588), 10 states have internal predecessors, (2588), 0 states have call successors, (0), 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 02:31:21,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 677.0) internal successors, (7447), 11 states have internal predecessors, (7447), 0 states have call successors, (0), 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 02:31:21,391 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 677.0) internal successors, (7447), 11 states have internal predecessors, (7447), 0 states have call successors, (0), 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 02:31:21,391 INFO L175 Difference]: Start difference. First operand has 142 places, 210 transitions, 2136 flow. Second operand 10 states and 2588 transitions. [2023-01-28 02:31:21,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 516 transitions, 5474 flow [2023-01-28 02:31:21,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 516 transitions, 5344 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-01-28 02:31:21,863 INFO L231 Difference]: Finished difference. Result has 144 places, 216 transitions, 2157 flow [2023-01-28 02:31:21,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2157, PETRI_PLACES=144, PETRI_TRANSITIONS=216} [2023-01-28 02:31:21,864 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 106 predicate places. [2023-01-28 02:31:21,864 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 216 transitions, 2157 flow [2023-01-28 02:31:21,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 245.42857142857142) internal successors, (1718), 7 states have internal predecessors, (1718), 0 states have call successors, (0), 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 02:31:21,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:21,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:21,869 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 02:31:22,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 02:31:22,065 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:22,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash -143631792, now seen corresponding path program 1 times [2023-01-28 02:31:22,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:22,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405083497] [2023-01-28 02:31:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:22,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:22,130 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 02:31:22,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:22,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405083497] [2023-01-28 02:31:22,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405083497] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:22,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:31:22,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 02:31:22,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081788819] [2023-01-28 02:31:22,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:22,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:22,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:22,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:22,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:31:22,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 677 [2023-01-28 02:31:22,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 216 transitions, 2157 flow. Second operand has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 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 02:31:22,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:22,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 677 [2023-01-28 02:31:22,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:23,966 INFO L130 PetriNetUnfolder]: 10902/15866 cut-off events. [2023-01-28 02:31:23,966 INFO L131 PetriNetUnfolder]: For 66763/66763 co-relation queries the response was YES. [2023-01-28 02:31:24,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62778 conditions, 15866 events. 10902/15866 cut-off events. For 66763/66763 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 92217 event pairs, 4879 based on Foata normal form. 572/16438 useless extension candidates. Maximal degree in co-relation 62201. Up to 11427 conditions per place. [2023-01-28 02:31:24,052 INFO L137 encePairwiseOnDemand]: 669/677 looper letters, 196 selfloop transitions, 13 changer transitions 54/263 dead transitions. [2023-01-28 02:31:24,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 263 transitions, 2636 flow [2023-01-28 02:31:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 02:31:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 02:31:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1862 transitions. [2023-01-28 02:31:24,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3929098966026588 [2023-01-28 02:31:24,055 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1862 transitions. [2023-01-28 02:31:24,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1862 transitions. [2023-01-28 02:31:24,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:24,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1862 transitions. [2023-01-28 02:31:24,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 266.0) internal successors, (1862), 7 states have internal predecessors, (1862), 0 states have call successors, (0), 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 02:31:24,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 677.0) internal successors, (5416), 8 states have internal predecessors, (5416), 0 states have call successors, (0), 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 02:31:24,061 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 677.0) internal successors, (5416), 8 states have internal predecessors, (5416), 0 states have call successors, (0), 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 02:31:24,061 INFO L175 Difference]: Start difference. First operand has 144 places, 216 transitions, 2157 flow. Second operand 7 states and 1862 transitions. [2023-01-28 02:31:24,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 263 transitions, 2636 flow [2023-01-28 02:31:24,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 263 transitions, 2398 flow, removed 71 selfloop flow, removed 11 redundant places. [2023-01-28 02:31:24,406 INFO L231 Difference]: Finished difference. Result has 143 places, 131 transitions, 1030 flow [2023-01-28 02:31:24,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1030, PETRI_PLACES=143, PETRI_TRANSITIONS=131} [2023-01-28 02:31:24,407 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 105 predicate places. [2023-01-28 02:31:24,407 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 131 transitions, 1030 flow [2023-01-28 02:31:24,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 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 02:31:24,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:24,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:24,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 02:31:24,408 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:24,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:24,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1576177570, now seen corresponding path program 1 times [2023-01-28 02:31:24,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:24,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491033375] [2023-01-28 02:31:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:24,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:24,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:24,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491033375] [2023-01-28 02:31:24,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491033375] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:24,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:31:24,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:31:24,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137597497] [2023-01-28 02:31:24,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:24,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:24,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:24,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:31:24,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 677 [2023-01-28 02:31:24,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 131 transitions, 1030 flow. Second operand has 5 states, 5 states have (on average 253.2) internal successors, (1266), 5 states have internal predecessors, (1266), 0 states have call successors, (0), 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 02:31:24,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:24,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 677 [2023-01-28 02:31:24,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:25,735 INFO L130 PetriNetUnfolder]: 6934/9959 cut-off events. [2023-01-28 02:31:25,735 INFO L131 PetriNetUnfolder]: For 42926/42926 co-relation queries the response was YES. [2023-01-28 02:31:25,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40103 conditions, 9959 events. 6934/9959 cut-off events. For 42926/42926 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 51881 event pairs, 3324 based on Foata normal form. 192/10151 useless extension candidates. Maximal degree in co-relation 40054. Up to 7795 conditions per place. [2023-01-28 02:31:25,774 INFO L137 encePairwiseOnDemand]: 671/677 looper letters, 106 selfloop transitions, 4 changer transitions 126/236 dead transitions. [2023-01-28 02:31:25,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 236 transitions, 2116 flow [2023-01-28 02:31:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 02:31:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 02:31:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1856 transitions. [2023-01-28 02:31:25,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39164380671027643 [2023-01-28 02:31:25,776 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1856 transitions. [2023-01-28 02:31:25,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1856 transitions. [2023-01-28 02:31:25,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:25,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1856 transitions. [2023-01-28 02:31:25,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 265.14285714285717) internal successors, (1856), 7 states have internal predecessors, (1856), 0 states have call successors, (0), 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 02:31:25,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 677.0) internal successors, (5416), 8 states have internal predecessors, (5416), 0 states have call successors, (0), 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 02:31:25,781 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 677.0) internal successors, (5416), 8 states have internal predecessors, (5416), 0 states have call successors, (0), 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 02:31:25,781 INFO L175 Difference]: Start difference. First operand has 143 places, 131 transitions, 1030 flow. Second operand 7 states and 1856 transitions. [2023-01-28 02:31:25,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 236 transitions, 2116 flow [2023-01-28 02:31:26,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 236 transitions, 1895 flow, removed 83 selfloop flow, removed 19 redundant places. [2023-01-28 02:31:26,319 INFO L231 Difference]: Finished difference. Result has 103 places, 110 transitions, 742 flow [2023-01-28 02:31:26,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=742, PETRI_PLACES=103, PETRI_TRANSITIONS=110} [2023-01-28 02:31:26,320 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2023-01-28 02:31:26,321 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 110 transitions, 742 flow [2023-01-28 02:31:26,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.2) internal successors, (1266), 5 states have internal predecessors, (1266), 0 states have call successors, (0), 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 02:31:26,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:26,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:26,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 02:31:26,321 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:26,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:26,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1200551145, now seen corresponding path program 1 times [2023-01-28 02:31:26,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:26,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027889414] [2023-01-28 02:31:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:26,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:26,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:26,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027889414] [2023-01-28 02:31:26,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027889414] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:26,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:31:26,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 02:31:26,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651919279] [2023-01-28 02:31:26,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:26,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:31:26,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:31:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:31:26,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 677 [2023-01-28 02:31:26,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 110 transitions, 742 flow. Second operand has 5 states, 5 states have (on average 253.2) internal successors, (1266), 5 states have internal predecessors, (1266), 0 states have call successors, (0), 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 02:31:26,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:26,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 677 [2023-01-28 02:31:26,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:27,021 INFO L130 PetriNetUnfolder]: 4761/6778 cut-off events. [2023-01-28 02:31:27,022 INFO L131 PetriNetUnfolder]: For 10582/10582 co-relation queries the response was YES. [2023-01-28 02:31:27,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22541 conditions, 6778 events. 4761/6778 cut-off events. For 10582/10582 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 32066 event pairs, 2380 based on Foata normal form. 72/6850 useless extension candidates. Maximal degree in co-relation 22505. Up to 6062 conditions per place. [2023-01-28 02:31:27,055 INFO L137 encePairwiseOnDemand]: 669/677 looper letters, 83 selfloop transitions, 2 changer transitions 80/165 dead transitions. [2023-01-28 02:31:27,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 165 transitions, 1272 flow [2023-01-28 02:31:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 02:31:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 02:31:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1839 transitions. [2023-01-28 02:31:27,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38805655201519307 [2023-01-28 02:31:27,058 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1839 transitions. [2023-01-28 02:31:27,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1839 transitions. [2023-01-28 02:31:27,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:27,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1839 transitions. [2023-01-28 02:31:27,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 262.7142857142857) internal successors, (1839), 7 states have internal predecessors, (1839), 0 states have call successors, (0), 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 02:31:27,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 677.0) internal successors, (5416), 8 states have internal predecessors, (5416), 0 states have call successors, (0), 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 02:31:27,062 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 677.0) internal successors, (5416), 8 states have internal predecessors, (5416), 0 states have call successors, (0), 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 02:31:27,062 INFO L175 Difference]: Start difference. First operand has 103 places, 110 transitions, 742 flow. Second operand 7 states and 1839 transitions. [2023-01-28 02:31:27,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 165 transitions, 1272 flow [2023-01-28 02:31:27,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 165 transitions, 1241 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-01-28 02:31:27,094 INFO L231 Difference]: Finished difference. Result has 96 places, 85 transitions, 497 flow [2023-01-28 02:31:27,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=497, PETRI_PLACES=96, PETRI_TRANSITIONS=85} [2023-01-28 02:31:27,094 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2023-01-28 02:31:27,094 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 85 transitions, 497 flow [2023-01-28 02:31:27,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.2) internal successors, (1266), 5 states have internal predecessors, (1266), 0 states have call successors, (0), 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 02:31:27,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:27,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:27,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 02:31:27,095 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:27,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1872973148, now seen corresponding path program 1 times [2023-01-28 02:31:27,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:27,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366138211] [2023-01-28 02:31:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:27,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:27,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:27,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366138211] [2023-01-28 02:31:27,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366138211] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:27,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139020565] [2023-01-28 02:31:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:27,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:27,370 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 02:31:27,372 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 02:31:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:27,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 02:31:27,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:27,694 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 02:31:27,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:27,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:27,955 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 185 treesize of output 165 [2023-01-28 02:31:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:28,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139020565] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:31:28,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:31:28,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-01-28 02:31:28,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806125359] [2023-01-28 02:31:28,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:31:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 02:31:28,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 02:31:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2023-01-28 02:31:28,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 677 [2023-01-28 02:31:28,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 497 flow. Second operand has 28 states, 28 states have (on average 233.78571428571428) internal successors, (6546), 28 states have internal predecessors, (6546), 0 states have call successors, (0), 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 02:31:28,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:28,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 677 [2023-01-28 02:31:28,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:30,872 INFO L130 PetriNetUnfolder]: 10737/15267 cut-off events. [2023-01-28 02:31:30,872 INFO L131 PetriNetUnfolder]: For 21825/21825 co-relation queries the response was YES. [2023-01-28 02:31:30,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49510 conditions, 15267 events. 10737/15267 cut-off events. For 21825/21825 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 84455 event pairs, 1064 based on Foata normal form. 447/15714 useless extension candidates. Maximal degree in co-relation 49477. Up to 3520 conditions per place. [2023-01-28 02:31:30,964 INFO L137 encePairwiseOnDemand]: 663/677 looper letters, 393 selfloop transitions, 93 changer transitions 20/506 dead transitions. [2023-01-28 02:31:30,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 506 transitions, 3365 flow [2023-01-28 02:31:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 02:31:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 02:31:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 7566 transitions. [2023-01-28 02:31:30,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36050888645351886 [2023-01-28 02:31:30,970 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 7566 transitions. [2023-01-28 02:31:30,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 7566 transitions. [2023-01-28 02:31:30,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:30,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 7566 transitions. [2023-01-28 02:31:30,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 244.06451612903226) internal successors, (7566), 31 states have internal predecessors, (7566), 0 states have call successors, (0), 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 02:31:30,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 677.0) internal successors, (21664), 32 states have internal predecessors, (21664), 0 states have call successors, (0), 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 02:31:30,987 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 677.0) internal successors, (21664), 32 states have internal predecessors, (21664), 0 states have call successors, (0), 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 02:31:30,987 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 497 flow. Second operand 31 states and 7566 transitions. [2023-01-28 02:31:30,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 506 transitions, 3365 flow [2023-01-28 02:31:31,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 506 transitions, 3237 flow, removed 57 selfloop flow, removed 12 redundant places. [2023-01-28 02:31:31,244 INFO L231 Difference]: Finished difference. Result has 116 places, 160 transitions, 1324 flow [2023-01-28 02:31:31,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1324, PETRI_PLACES=116, PETRI_TRANSITIONS=160} [2023-01-28 02:31:31,245 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 78 predicate places. [2023-01-28 02:31:31,245 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 160 transitions, 1324 flow [2023-01-28 02:31:31,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 233.78571428571428) internal successors, (6546), 28 states have internal predecessors, (6546), 0 states have call successors, (0), 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 02:31:31,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:31,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:31,250 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 02:31:31,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 02:31:31,446 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:31,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:31,447 INFO L85 PathProgramCache]: Analyzing trace with hash 691585832, now seen corresponding path program 2 times [2023-01-28 02:31:31,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:31,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108208748] [2023-01-28 02:31:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:31,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:31:31,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:31,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108208748] [2023-01-28 02:31:31,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108208748] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:31,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338666486] [2023-01-28 02:31:31,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:31:31,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:31,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:31,756 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 02:31:31,762 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 02:31:31,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 02:31:31,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:31,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-28 02:31:31,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:31:32,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:32,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338666486] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:32,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:32,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-01-28 02:31:32,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865961350] [2023-01-28 02:31:32,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:32,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:31:32,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:32,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:31:32,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-01-28 02:31:32,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 677 [2023-01-28 02:31:32,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 160 transitions, 1324 flow. Second operand has 9 states, 9 states have (on average 233.88888888888889) internal successors, (2105), 9 states have internal predecessors, (2105), 0 states have call successors, (0), 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 02:31:32,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:32,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 677 [2023-01-28 02:31:32,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:33,597 INFO L130 PetriNetUnfolder]: 12239/17496 cut-off events. [2023-01-28 02:31:33,597 INFO L131 PetriNetUnfolder]: For 57955/57955 co-relation queries the response was YES. [2023-01-28 02:31:33,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64748 conditions, 17496 events. 12239/17496 cut-off events. For 57955/57955 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 100856 event pairs, 2508 based on Foata normal form. 206/17702 useless extension candidates. Maximal degree in co-relation 64710. Up to 7214 conditions per place. [2023-01-28 02:31:33,713 INFO L137 encePairwiseOnDemand]: 666/677 looper letters, 203 selfloop transitions, 63 changer transitions 4/270 dead transitions. [2023-01-28 02:31:33,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 270 transitions, 2410 flow [2023-01-28 02:31:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:31:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:31:33,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2457 transitions. [2023-01-28 02:31:33,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36292466765140324 [2023-01-28 02:31:33,716 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2457 transitions. [2023-01-28 02:31:33,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2457 transitions. [2023-01-28 02:31:33,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:33,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2457 transitions. [2023-01-28 02:31:33,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 245.7) internal successors, (2457), 10 states have internal predecessors, (2457), 0 states have call successors, (0), 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 02:31:33,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 677.0) internal successors, (7447), 11 states have internal predecessors, (7447), 0 states have call successors, (0), 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 02:31:33,722 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 677.0) internal successors, (7447), 11 states have internal predecessors, (7447), 0 states have call successors, (0), 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 02:31:33,722 INFO L175 Difference]: Start difference. First operand has 116 places, 160 transitions, 1324 flow. Second operand 10 states and 2457 transitions. [2023-01-28 02:31:33,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 270 transitions, 2410 flow [2023-01-28 02:31:34,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 270 transitions, 2307 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-01-28 02:31:34,144 INFO L231 Difference]: Finished difference. Result has 123 places, 175 transitions, 1578 flow [2023-01-28 02:31:34,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1578, PETRI_PLACES=123, PETRI_TRANSITIONS=175} [2023-01-28 02:31:34,145 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2023-01-28 02:31:34,145 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 175 transitions, 1578 flow [2023-01-28 02:31:34,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 233.88888888888889) internal successors, (2105), 9 states have internal predecessors, (2105), 0 states have call successors, (0), 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 02:31:34,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:34,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:34,150 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 02:31:34,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 02:31:34,346 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:34,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1361462932, now seen corresponding path program 3 times [2023-01-28 02:31:34,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:34,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770306007] [2023-01-28 02:31:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:34,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:34,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:34,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770306007] [2023-01-28 02:31:34,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770306007] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:34,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872611296] [2023-01-28 02:31:34,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:31:34,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:34,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:34,829 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 02:31:34,831 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 02:31:34,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-28 02:31:34,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:34,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-28 02:31:34,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:31:35,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:31:35,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872611296] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:31:35,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:31:35,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-01-28 02:31:35,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676506176] [2023-01-28 02:31:35,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:35,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:31:35,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:35,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:31:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:31:35,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 677 [2023-01-28 02:31:35,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 175 transitions, 1578 flow. Second operand has 9 states, 9 states have (on average 233.88888888888889) internal successors, (2105), 9 states have internal predecessors, (2105), 0 states have call successors, (0), 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 02:31:35,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:35,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 677 [2023-01-28 02:31:35,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:36,891 INFO L130 PetriNetUnfolder]: 12635/18266 cut-off events. [2023-01-28 02:31:36,892 INFO L131 PetriNetUnfolder]: For 82008/82008 co-relation queries the response was YES. [2023-01-28 02:31:36,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67964 conditions, 18266 events. 12635/18266 cut-off events. For 82008/82008 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 108682 event pairs, 2664 based on Foata normal form. 550/18816 useless extension candidates. Maximal degree in co-relation 67924. Up to 7214 conditions per place. [2023-01-28 02:31:36,984 INFO L137 encePairwiseOnDemand]: 666/677 looper letters, 226 selfloop transitions, 62 changer transitions 5/293 dead transitions. [2023-01-28 02:31:36,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 293 transitions, 2880 flow [2023-01-28 02:31:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:31:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:31:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2455 transitions. [2023-01-28 02:31:36,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362629246676514 [2023-01-28 02:31:36,986 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2455 transitions. [2023-01-28 02:31:36,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2455 transitions. [2023-01-28 02:31:36,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:36,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2455 transitions. [2023-01-28 02:31:36,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 245.5) internal successors, (2455), 10 states have internal predecessors, (2455), 0 states have call successors, (0), 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 02:31:36,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 677.0) internal successors, (7447), 11 states have internal predecessors, (7447), 0 states have call successors, (0), 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 02:31:36,992 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 677.0) internal successors, (7447), 11 states have internal predecessors, (7447), 0 states have call successors, (0), 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 02:31:36,992 INFO L175 Difference]: Start difference. First operand has 123 places, 175 transitions, 1578 flow. Second operand 10 states and 2455 transitions. [2023-01-28 02:31:36,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 293 transitions, 2880 flow [2023-01-28 02:31:37,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 293 transitions, 2749 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-01-28 02:31:37,504 INFO L231 Difference]: Finished difference. Result has 130 places, 195 transitions, 1969 flow [2023-01-28 02:31:37,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1969, PETRI_PLACES=130, PETRI_TRANSITIONS=195} [2023-01-28 02:31:37,504 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 92 predicate places. [2023-01-28 02:31:37,504 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 195 transitions, 1969 flow [2023-01-28 02:31:37,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 233.88888888888889) internal successors, (2105), 9 states have internal predecessors, (2105), 0 states have call successors, (0), 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 02:31:37,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:37,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:37,512 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 02:31:37,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 02:31:37,709 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:37,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1069219752, now seen corresponding path program 4 times [2023-01-28 02:31:37,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:37,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258706566] [2023-01-28 02:31:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:37,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:31:38,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:38,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258706566] [2023-01-28 02:31:38,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258706566] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:38,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170892350] [2023-01-28 02:31:38,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:31:38,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:38,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:38,009 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 02:31:38,011 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 02:31:38,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:31:38,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:38,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 02:31:38,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:38,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:38,255 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 160 treesize of output 141 [2023-01-28 02:31:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:31:38,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:39,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:39,124 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 182 treesize of output 162 [2023-01-28 02:31:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:31:39,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170892350] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:39,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:31:39,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 21 [2023-01-28 02:31:39,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490860016] [2023-01-28 02:31:39,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:39,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 02:31:39,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 02:31:39,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-01-28 02:31:39,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 677 [2023-01-28 02:31:39,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 195 transitions, 1969 flow. Second operand has 8 states, 8 states have (on average 253.25) internal successors, (2026), 8 states have internal predecessors, (2026), 0 states have call successors, (0), 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 02:31:39,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:39,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 677 [2023-01-28 02:31:39,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:41,764 INFO L130 PetriNetUnfolder]: 15077/22280 cut-off events. [2023-01-28 02:31:41,764 INFO L131 PetriNetUnfolder]: For 109947/109947 co-relation queries the response was YES. [2023-01-28 02:31:41,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85603 conditions, 22280 events. 15077/22280 cut-off events. For 109947/109947 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 142753 event pairs, 592 based on Foata normal form. 2/22282 useless extension candidates. Maximal degree in co-relation 85560. Up to 8452 conditions per place. [2023-01-28 02:31:41,943 INFO L137 encePairwiseOnDemand]: 664/677 looper letters, 261 selfloop transitions, 187 changer transitions 1/449 dead transitions. [2023-01-28 02:31:41,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 449 transitions, 4776 flow [2023-01-28 02:31:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:31:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:31:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3454 transitions. [2023-01-28 02:31:41,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924554027951369 [2023-01-28 02:31:41,946 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3454 transitions. [2023-01-28 02:31:41,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3454 transitions. [2023-01-28 02:31:41,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:41,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3454 transitions. [2023-01-28 02:31:41,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 265.6923076923077) internal successors, (3454), 13 states have internal predecessors, (3454), 0 states have call successors, (0), 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 02:31:41,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 677.0) internal successors, (9478), 14 states have internal predecessors, (9478), 0 states have call successors, (0), 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 02:31:41,953 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 677.0) internal successors, (9478), 14 states have internal predecessors, (9478), 0 states have call successors, (0), 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 02:31:41,953 INFO L175 Difference]: Start difference. First operand has 130 places, 195 transitions, 1969 flow. Second operand 13 states and 3454 transitions. [2023-01-28 02:31:41,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 449 transitions, 4776 flow [2023-01-28 02:31:42,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 449 transitions, 4681 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-01-28 02:31:42,778 INFO L231 Difference]: Finished difference. Result has 144 places, 296 transitions, 3466 flow [2023-01-28 02:31:42,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3466, PETRI_PLACES=144, PETRI_TRANSITIONS=296} [2023-01-28 02:31:42,778 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 106 predicate places. [2023-01-28 02:31:42,778 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 296 transitions, 3466 flow [2023-01-28 02:31:42,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 253.25) internal successors, (2026), 8 states have internal predecessors, (2026), 0 states have call successors, (0), 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 02:31:42,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:42,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:42,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 02:31:42,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 02:31:42,979 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:42,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:42,979 INFO L85 PathProgramCache]: Analyzing trace with hash 755674220, now seen corresponding path program 5 times [2023-01-28 02:31:42,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:42,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13110268] [2023-01-28 02:31:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:42,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:31:43,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:43,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13110268] [2023-01-28 02:31:43,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13110268] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:43,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902431859] [2023-01-28 02:31:43,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:31:43,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:43,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:43,247 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 02:31:43,248 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 02:31:43,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:31:43,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 02:31:43,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:43,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:44,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:44,015 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 185 treesize of output 165 [2023-01-28 02:31:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:31:44,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902431859] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:44,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:31:44,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 10] total 26 [2023-01-28 02:31:44,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045541314] [2023-01-28 02:31:44,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:44,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:31:44,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:44,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:31:44,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2023-01-28 02:31:44,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 677 [2023-01-28 02:31:44,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 296 transitions, 3466 flow. Second operand has 9 states, 9 states have (on average 229.88888888888889) internal successors, (2069), 9 states have internal predecessors, (2069), 0 states have call successors, (0), 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 02:31:44,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:44,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 677 [2023-01-28 02:31:44,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:47,485 INFO L130 PetriNetUnfolder]: 16719/25038 cut-off events. [2023-01-28 02:31:47,485 INFO L131 PetriNetUnfolder]: For 146334/146334 co-relation queries the response was YES. [2023-01-28 02:31:47,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108517 conditions, 25038 events. 16719/25038 cut-off events. For 146334/146334 co-relation queries the response was YES. Maximal size of possible extension queue 1211. Compared 165811 event pairs, 2106 based on Foata normal form. 4/25042 useless extension candidates. Maximal degree in co-relation 108468. Up to 7556 conditions per place. [2023-01-28 02:31:47,722 INFO L137 encePairwiseOnDemand]: 664/677 looper letters, 426 selfloop transitions, 161 changer transitions 3/590 dead transitions. [2023-01-28 02:31:47,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 590 transitions, 6874 flow [2023-01-28 02:31:47,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 02:31:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 02:31:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3878 transitions. [2023-01-28 02:31:47,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35801329394387 [2023-01-28 02:31:47,726 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3878 transitions. [2023-01-28 02:31:47,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3878 transitions. [2023-01-28 02:31:47,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:47,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3878 transitions. [2023-01-28 02:31:47,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 242.375) internal successors, (3878), 16 states have internal predecessors, (3878), 0 states have call successors, (0), 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 02:31:47,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 677.0) internal successors, (11509), 17 states have internal predecessors, (11509), 0 states have call successors, (0), 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 02:31:47,734 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 677.0) internal successors, (11509), 17 states have internal predecessors, (11509), 0 states have call successors, (0), 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 02:31:47,734 INFO L175 Difference]: Start difference. First operand has 144 places, 296 transitions, 3466 flow. Second operand 16 states and 3878 transitions. [2023-01-28 02:31:47,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 590 transitions, 6874 flow [2023-01-28 02:31:49,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 590 transitions, 6830 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-01-28 02:31:49,093 INFO L231 Difference]: Finished difference. Result has 164 places, 375 transitions, 4951 flow [2023-01-28 02:31:49,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=3430, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4951, PETRI_PLACES=164, PETRI_TRANSITIONS=375} [2023-01-28 02:31:49,094 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 126 predicate places. [2023-01-28 02:31:49,094 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 375 transitions, 4951 flow [2023-01-28 02:31:49,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 229.88888888888889) internal successors, (2069), 9 states have internal predecessors, (2069), 0 states have call successors, (0), 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 02:31:49,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:49,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:49,098 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 02:31:49,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 02:31:49,295 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:49,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:49,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1054811520, now seen corresponding path program 6 times [2023-01-28 02:31:49,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:49,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300951427] [2023-01-28 02:31:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:49,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:49,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:49,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300951427] [2023-01-28 02:31:49,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300951427] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:49,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331943095] [2023-01-28 02:31:49,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:31:49,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:49,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:49,586 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 02:31:49,588 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 02:31:49,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 02:31:49,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:31:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 02:31:49,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:49,917 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 02:31:49,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:50,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:31:50,448 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 185 treesize of output 165 [2023-01-28 02:31:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:31:50,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331943095] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:31:50,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:31:50,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2023-01-28 02:31:50,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204273402] [2023-01-28 02:31:50,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:31:50,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 02:31:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 02:31:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2023-01-28 02:31:50,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 677 [2023-01-28 02:31:50,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 375 transitions, 4951 flow. Second operand has 28 states, 28 states have (on average 233.78571428571428) internal successors, (6546), 28 states have internal predecessors, (6546), 0 states have call successors, (0), 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 02:31:50,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:50,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 677 [2023-01-28 02:31:50,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:31:54,581 INFO L130 PetriNetUnfolder]: 16865/25290 cut-off events. [2023-01-28 02:31:54,581 INFO L131 PetriNetUnfolder]: For 177584/177584 co-relation queries the response was YES. [2023-01-28 02:31:54,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118529 conditions, 25290 events. 16865/25290 cut-off events. For 177584/177584 co-relation queries the response was YES. Maximal size of possible extension queue 1217. Compared 168895 event pairs, 3256 based on Foata normal form. 10/25300 useless extension candidates. Maximal degree in co-relation 118474. Up to 8146 conditions per place. [2023-01-28 02:31:54,745 INFO L137 encePairwiseOnDemand]: 664/677 looper letters, 353 selfloop transitions, 140 changer transitions 14/507 dead transitions. [2023-01-28 02:31:54,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 507 transitions, 6820 flow [2023-01-28 02:31:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 02:31:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 02:31:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3861 transitions. [2023-01-28 02:31:54,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35644387001477107 [2023-01-28 02:31:54,748 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3861 transitions. [2023-01-28 02:31:54,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3861 transitions. [2023-01-28 02:31:54,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:31:54,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3861 transitions. [2023-01-28 02:31:54,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 241.3125) internal successors, (3861), 16 states have internal predecessors, (3861), 0 states have call successors, (0), 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 02:31:54,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 677.0) internal successors, (11509), 17 states have internal predecessors, (11509), 0 states have call successors, (0), 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 02:31:54,756 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 677.0) internal successors, (11509), 17 states have internal predecessors, (11509), 0 states have call successors, (0), 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 02:31:54,756 INFO L175 Difference]: Start difference. First operand has 164 places, 375 transitions, 4951 flow. Second operand 16 states and 3861 transitions. [2023-01-28 02:31:54,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 507 transitions, 6820 flow [2023-01-28 02:31:56,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 507 transitions, 6776 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-01-28 02:31:56,268 INFO L231 Difference]: Finished difference. Result has 182 places, 376 transitions, 5478 flow [2023-01-28 02:31:56,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=4907, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5478, PETRI_PLACES=182, PETRI_TRANSITIONS=376} [2023-01-28 02:31:56,269 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 144 predicate places. [2023-01-28 02:31:56,269 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 376 transitions, 5478 flow [2023-01-28 02:31:56,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 233.78571428571428) internal successors, (6546), 28 states have internal predecessors, (6546), 0 states have call successors, (0), 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 02:31:56,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:31:56,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:31:56,276 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 02:31:56,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:56,470 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:31:56,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:31:56,471 INFO L85 PathProgramCache]: Analyzing trace with hash -499241063, now seen corresponding path program 1 times [2023-01-28 02:31:56,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:31:56,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024827990] [2023-01-28 02:31:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:56,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:31:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:56,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:31:56,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024827990] [2023-01-28 02:31:56,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024827990] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:56,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666653150] [2023-01-28 02:31:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:31:56,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:31:56,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:31:56,610 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 02:31:56,612 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 02:31:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:31:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 02:31:56,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:31:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:56,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:31:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:31:56,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666653150] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:31:56,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:31:56,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-01-28 02:31:56,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910570436] [2023-01-28 02:31:56,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:31:56,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 02:31:56,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:31:56,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 02:31:56,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-28 02:31:56,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 677 [2023-01-28 02:31:56,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 376 transitions, 5478 flow. Second operand has 7 states, 7 states have (on average 245.85714285714286) internal successors, (1721), 7 states have internal predecessors, (1721), 0 states have call successors, (0), 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 02:31:56,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:31:56,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 677 [2023-01-28 02:31:56,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:32:00,501 INFO L130 PetriNetUnfolder]: 17237/25926 cut-off events. [2023-01-28 02:32:00,502 INFO L131 PetriNetUnfolder]: For 207930/207930 co-relation queries the response was YES. [2023-01-28 02:32:00,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124287 conditions, 25926 events. 17237/25926 cut-off events. For 207930/207930 co-relation queries the response was YES. Maximal size of possible extension queue 1221. Compared 175085 event pairs, 4358 based on Foata normal form. 328/26254 useless extension candidates. Maximal degree in co-relation 124227. Up to 11214 conditions per place. [2023-01-28 02:32:00,658 INFO L137 encePairwiseOnDemand]: 669/677 looper letters, 446 selfloop transitions, 41 changer transitions 0/487 dead transitions. [2023-01-28 02:32:00,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 487 transitions, 7583 flow [2023-01-28 02:32:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 02:32:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 02:32:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2042 transitions. [2023-01-28 02:32:00,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37703101920236337 [2023-01-28 02:32:00,660 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2042 transitions. [2023-01-28 02:32:00,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2042 transitions. [2023-01-28 02:32:00,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:32:00,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2042 transitions. [2023-01-28 02:32:00,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 255.25) internal successors, (2042), 8 states have internal predecessors, (2042), 0 states have call successors, (0), 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 02:32:00,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 677.0) internal successors, (6093), 9 states have internal predecessors, (6093), 0 states have call successors, (0), 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 02:32:00,664 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 677.0) internal successors, (6093), 9 states have internal predecessors, (6093), 0 states have call successors, (0), 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 02:32:00,664 INFO L175 Difference]: Start difference. First operand has 182 places, 376 transitions, 5478 flow. Second operand 8 states and 2042 transitions. [2023-01-28 02:32:00,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 487 transitions, 7583 flow [2023-01-28 02:32:02,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 487 transitions, 7407 flow, removed 37 selfloop flow, removed 11 redundant places. [2023-01-28 02:32:02,278 INFO L231 Difference]: Finished difference. Result has 178 places, 373 transitions, 5430 flow [2023-01-28 02:32:02,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=5225, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5430, PETRI_PLACES=178, PETRI_TRANSITIONS=373} [2023-01-28 02:32:02,279 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 140 predicate places. [2023-01-28 02:32:02,279 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 373 transitions, 5430 flow [2023-01-28 02:32:02,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 245.85714285714286) internal successors, (1721), 7 states have internal predecessors, (1721), 0 states have call successors, (0), 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 02:32:02,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:32:02,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:32:02,286 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 02:32:02,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:32:02,480 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:32:02,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:32:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1944526485, now seen corresponding path program 1 times [2023-01-28 02:32:02,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:32:02,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529648658] [2023-01-28 02:32:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:32:02,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:32:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:32:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:32:02,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:32:02,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529648658] [2023-01-28 02:32:02,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529648658] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:32:02,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:32:02,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 02:32:02,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837702523] [2023-01-28 02:32:02,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:32:02,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:32:02,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:32:02,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:32:02,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-01-28 02:32:02,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 677 [2023-01-28 02:32:02,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 373 transitions, 5430 flow. Second operand has 9 states, 9 states have (on average 245.0) internal successors, (2205), 9 states have internal predecessors, (2205), 0 states have call successors, (0), 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 02:32:02,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:32:02,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 677 [2023-01-28 02:32:02,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:32:07,678 INFO L130 PetriNetUnfolder]: 23265/35014 cut-off events. [2023-01-28 02:32:07,678 INFO L131 PetriNetUnfolder]: For 290514/290514 co-relation queries the response was YES. [2023-01-28 02:32:07,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169720 conditions, 35014 events. 23265/35014 cut-off events. For 290514/290514 co-relation queries the response was YES. Maximal size of possible extension queue 1646. Compared 249355 event pairs, 6592 based on Foata normal form. 18/35032 useless extension candidates. Maximal degree in co-relation 169661. Up to 18984 conditions per place. [2023-01-28 02:32:07,920 INFO L137 encePairwiseOnDemand]: 667/677 looper letters, 460 selfloop transitions, 19 changer transitions 362/841 dead transitions. [2023-01-28 02:32:07,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 841 transitions, 13269 flow [2023-01-28 02:32:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 02:32:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 02:32:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2305 transitions. [2023-01-28 02:32:07,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783029706220253 [2023-01-28 02:32:07,922 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2305 transitions. [2023-01-28 02:32:07,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2305 transitions. [2023-01-28 02:32:07,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:32:07,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2305 transitions. [2023-01-28 02:32:07,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 256.1111111111111) internal successors, (2305), 9 states have internal predecessors, (2305), 0 states have call successors, (0), 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 02:32:07,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 677.0) internal successors, (6770), 10 states have internal predecessors, (6770), 0 states have call successors, (0), 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 02:32:07,926 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 677.0) internal successors, (6770), 10 states have internal predecessors, (6770), 0 states have call successors, (0), 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 02:32:07,927 INFO L175 Difference]: Start difference. First operand has 178 places, 373 transitions, 5430 flow. Second operand 9 states and 2305 transitions. [2023-01-28 02:32:07,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 841 transitions, 13269 flow [2023-01-28 02:32:10,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 841 transitions, 13263 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 02:32:10,374 INFO L231 Difference]: Finished difference. Result has 188 places, 333 transitions, 4695 flow [2023-01-28 02:32:10,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=5424, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4695, PETRI_PLACES=188, PETRI_TRANSITIONS=333} [2023-01-28 02:32:10,375 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 150 predicate places. [2023-01-28 02:32:10,375 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 333 transitions, 4695 flow [2023-01-28 02:32:10,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 245.0) internal successors, (2205), 9 states have internal predecessors, (2205), 0 states have call successors, (0), 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 02:32:10,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:32:10,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:32:10,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-28 02:32:10,376 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:32:10,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:32:10,376 INFO L85 PathProgramCache]: Analyzing trace with hash 935700835, now seen corresponding path program 2 times [2023-01-28 02:32:10,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:32:10,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325610690] [2023-01-28 02:32:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:32:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:32:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:32:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:32:10,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:32:10,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325610690] [2023-01-28 02:32:10,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325610690] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:32:10,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:32:10,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 02:32:10,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036970536] [2023-01-28 02:32:10,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:32:10,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 02:32:10,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:32:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 02:32:10,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-01-28 02:32:10,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 677 [2023-01-28 02:32:10,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 333 transitions, 4695 flow. Second operand has 10 states, 10 states have (on average 238.7) internal successors, (2387), 10 states have internal predecessors, (2387), 0 states have call successors, (0), 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 02:32:10,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:32:10,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 677 [2023-01-28 02:32:10,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:32:15,740 INFO L130 PetriNetUnfolder]: 23699/35438 cut-off events. [2023-01-28 02:32:15,740 INFO L131 PetriNetUnfolder]: For 302948/302948 co-relation queries the response was YES. [2023-01-28 02:32:15,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181610 conditions, 35438 events. 23699/35438 cut-off events. For 302948/302948 co-relation queries the response was YES. Maximal size of possible extension queue 1769. Compared 251148 event pairs, 8552 based on Foata normal form. 8/35446 useless extension candidates. Maximal degree in co-relation 181546. Up to 23316 conditions per place. [2023-01-28 02:32:16,082 INFO L137 encePairwiseOnDemand]: 668/677 looper letters, 441 selfloop transitions, 16 changer transitions 328/785 dead transitions. [2023-01-28 02:32:16,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 785 transitions, 12455 flow [2023-01-28 02:32:16,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 02:32:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 02:32:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2003 transitions. [2023-01-28 02:32:16,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3698301329394387 [2023-01-28 02:32:16,084 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2003 transitions. [2023-01-28 02:32:16,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2003 transitions. [2023-01-28 02:32:16,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:32:16,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2003 transitions. [2023-01-28 02:32:16,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 250.375) internal successors, (2003), 8 states have internal predecessors, (2003), 0 states have call successors, (0), 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 02:32:16,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 677.0) internal successors, (6093), 9 states have internal predecessors, (6093), 0 states have call successors, (0), 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 02:32:16,088 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 677.0) internal successors, (6093), 9 states have internal predecessors, (6093), 0 states have call successors, (0), 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 02:32:16,088 INFO L175 Difference]: Start difference. First operand has 188 places, 333 transitions, 4695 flow. Second operand 8 states and 2003 transitions. [2023-01-28 02:32:16,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 785 transitions, 12455 flow [2023-01-28 02:32:18,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 785 transitions, 12355 flow, removed 48 selfloop flow, removed 4 redundant places. [2023-01-28 02:32:18,890 INFO L231 Difference]: Finished difference. Result has 192 places, 334 transitions, 4743 flow [2023-01-28 02:32:18,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=4633, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4743, PETRI_PLACES=192, PETRI_TRANSITIONS=334} [2023-01-28 02:32:18,890 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 154 predicate places. [2023-01-28 02:32:18,891 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 334 transitions, 4743 flow [2023-01-28 02:32:18,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 238.7) internal successors, (2387), 10 states have internal predecessors, (2387), 0 states have call successors, (0), 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 02:32:18,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:32:18,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:32:18,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-01-28 02:32:18,891 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:32:18,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:32:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash 726820333, now seen corresponding path program 3 times [2023-01-28 02:32:18,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:32:18,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047518741] [2023-01-28 02:32:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:32:18,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:32:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:32:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:32:19,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:32:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047518741] [2023-01-28 02:32:19,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047518741] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:32:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385834338] [2023-01-28 02:32:19,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:32:19,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:32:19,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:32:19,207 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 02:32:19,207 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 02:32:19,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-28 02:32:19,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:32:19,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 02:32:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:32:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:32:19,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 02:32:19,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385834338] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:32:19,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 02:32:19,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 17 [2023-01-28 02:32:19,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194311233] [2023-01-28 02:32:19,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:32:19,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 02:32:19,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:32:19,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 02:32:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:32:19,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 677 [2023-01-28 02:32:19,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 334 transitions, 4743 flow. Second operand has 9 states, 9 states have (on average 230.0) internal successors, (2070), 9 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:19,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:32:19,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 677 [2023-01-28 02:32:19,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:32:24,161 INFO L130 PetriNetUnfolder]: 21697/32558 cut-off events. [2023-01-28 02:32:24,162 INFO L131 PetriNetUnfolder]: For 284515/284515 co-relation queries the response was YES. [2023-01-28 02:32:24,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174013 conditions, 32558 events. 21697/32558 cut-off events. For 284515/284515 co-relation queries the response was YES. Maximal size of possible extension queue 1673. Compared 228746 event pairs, 4950 based on Foata normal form. 2/32560 useless extension candidates. Maximal degree in co-relation 173948. Up to 12346 conditions per place. [2023-01-28 02:32:24,403 INFO L137 encePairwiseOnDemand]: 668/677 looper letters, 448 selfloop transitions, 71 changer transitions 12/531 dead transitions. [2023-01-28 02:32:24,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 531 transitions, 8046 flow [2023-01-28 02:32:24,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 02:32:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 02:32:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1952 transitions. [2023-01-28 02:32:24,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604135893648449 [2023-01-28 02:32:24,408 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1952 transitions. [2023-01-28 02:32:24,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1952 transitions. [2023-01-28 02:32:24,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:32:24,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1952 transitions. [2023-01-28 02:32:24,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 244.0) internal successors, (1952), 8 states have internal predecessors, (1952), 0 states have call successors, (0), 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 02:32:24,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 677.0) internal successors, (6093), 9 states have internal predecessors, (6093), 0 states have call successors, (0), 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 02:32:24,412 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 677.0) internal successors, (6093), 9 states have internal predecessors, (6093), 0 states have call successors, (0), 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 02:32:24,412 INFO L175 Difference]: Start difference. First operand has 192 places, 334 transitions, 4743 flow. Second operand 8 states and 1952 transitions. [2023-01-28 02:32:24,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 531 transitions, 8046 flow [2023-01-28 02:32:26,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 531 transitions, 7935 flow, removed 32 selfloop flow, removed 6 redundant places. [2023-01-28 02:32:26,687 INFO L231 Difference]: Finished difference. Result has 195 places, 363 transitions, 5602 flow [2023-01-28 02:32:26,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5602, PETRI_PLACES=195, PETRI_TRANSITIONS=363} [2023-01-28 02:32:26,687 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 157 predicate places. [2023-01-28 02:32:26,687 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 363 transitions, 5602 flow [2023-01-28 02:32:26,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 230.0) internal successors, (2070), 9 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:32:26,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:32:26,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:32:26,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 02:32:26,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 02:32:26,888 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:32:26,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:32:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1155113705, now seen corresponding path program 1 times [2023-01-28 02:32:26,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:32:26,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682302374] [2023-01-28 02:32:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:32:26,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:32:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:32:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:32:26,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:32:26,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682302374] [2023-01-28 02:32:26,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682302374] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:32:26,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:32:26,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:32:26,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085718179] [2023-01-28 02:32:26,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:32:26,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:32:26,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:32:26,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:32:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:32:26,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 677 [2023-01-28 02:32:26,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 363 transitions, 5602 flow. Second operand has 5 states, 5 states have (on average 253.8) internal successors, (1269), 5 states have internal predecessors, (1269), 0 states have call successors, (0), 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 02:32:26,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:32:26,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 677 [2023-01-28 02:32:26,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:32:29,256 INFO L130 PetriNetUnfolder]: 11143/16972 cut-off events. [2023-01-28 02:32:29,256 INFO L131 PetriNetUnfolder]: For 175871/175871 co-relation queries the response was YES. [2023-01-28 02:32:29,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92018 conditions, 16972 events. 11143/16972 cut-off events. For 175871/175871 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 109636 event pairs, 4528 based on Foata normal form. 880/17852 useless extension candidates. Maximal degree in co-relation 91951. Up to 11715 conditions per place. [2023-01-28 02:32:29,485 INFO L137 encePairwiseOnDemand]: 672/677 looper letters, 129 selfloop transitions, 4 changer transitions 135/268 dead transitions. [2023-01-28 02:32:29,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 268 transitions, 3695 flow [2023-01-28 02:32:29,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:32:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:32:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1315 transitions. [2023-01-28 02:32:29,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38847858197932056 [2023-01-28 02:32:29,486 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1315 transitions. [2023-01-28 02:32:29,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1315 transitions. [2023-01-28 02:32:29,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:32:29,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1315 transitions. [2023-01-28 02:32:29,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 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 02:32:29,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 677.0) internal successors, (4062), 6 states have internal predecessors, (4062), 0 states have call successors, (0), 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 02:32:29,489 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 677.0) internal successors, (4062), 6 states have internal predecessors, (4062), 0 states have call successors, (0), 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 02:32:29,489 INFO L175 Difference]: Start difference. First operand has 195 places, 363 transitions, 5602 flow. Second operand 5 states and 1315 transitions. [2023-01-28 02:32:29,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 268 transitions, 3695 flow [2023-01-28 02:32:30,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 268 transitions, 3310 flow, removed 35 selfloop flow, removed 20 redundant places. [2023-01-28 02:32:30,665 INFO L231 Difference]: Finished difference. Result has 175 places, 133 transitions, 1278 flow [2023-01-28 02:32:30,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=2457, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1278, PETRI_PLACES=175, PETRI_TRANSITIONS=133} [2023-01-28 02:32:30,665 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 137 predicate places. [2023-01-28 02:32:30,666 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 133 transitions, 1278 flow [2023-01-28 02:32:30,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.8) internal successors, (1269), 5 states have internal predecessors, (1269), 0 states have call successors, (0), 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 02:32:30,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:32:30,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:32:30,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-01-28 02:32:30,666 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:32:30,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:32:30,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1367699374, now seen corresponding path program 1 times [2023-01-28 02:32:30,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:32:30,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031966384] [2023-01-28 02:32:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:32:30,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:32:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:32:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:32:31,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:32:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031966384] [2023-01-28 02:32:31,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031966384] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:32:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605291869] [2023-01-28 02:32:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:32:31,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:32:31,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:32:31,273 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 02:32:31,273 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 02:32:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:32:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 02:32:31,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:32:31,593 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 02:32:31,668 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 02:32:31,742 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 02:32:32,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:32:32,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:32:32,045 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 02:32:32,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-01-28 02:32:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:32:32,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:32:33,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:32:33,420 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 266 treesize of output 158 [2023-01-28 02:32:33,472 INFO L321 Elim1Store]: treesize reduction 15, result has 55.9 percent of original size [2023-01-28 02:32:33,473 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 33916 treesize of output 32110 [2023-01-28 02:32:34,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:32:34,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4764 treesize of output 4500 [2023-01-28 02:32:34,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:32:34,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4476 treesize of output 4356 [2023-01-28 02:32:34,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:32:34,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4118 treesize of output 3630 [2023-01-28 02:40:35,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:40:35,270 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 103 treesize of output 67 [2023-01-28 02:40:35,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:40:35,306 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 2653 treesize of output 2526 [2023-01-28 02:40:35,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:40:35,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1373 treesize of output 1301 [2023-01-28 02:40:35,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:40:35,467 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 1046 treesize of output 927 [2023-01-28 02:40:35,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:40:35,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1149 treesize of output 1125 [2023-01-28 02:41:02,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:41:02,216 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 103 treesize of output 67 [2023-01-28 02:41:02,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:41:02,259 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 38477 treesize of output 36398 [2023-01-28 02:41:02,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:41:02,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1373 treesize of output 1349 [2023-01-28 02:41:02,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:41:02,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1325 treesize of output 1253 [2023-01-28 02:41:02,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:41:02,560 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 1014 treesize of output 895 [2023-01-28 02:41:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:41:17,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605291869] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:41:17,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:41:17,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2023-01-28 02:41:17,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275573342] [2023-01-28 02:41:17,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:41:17,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-01-28 02:41:17,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:41:17,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-01-28 02:41:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1955, Unknown=40, NotChecked=0, Total=2162 [2023-01-28 02:41:17,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 677 [2023-01-28 02:41:17,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 133 transitions, 1278 flow. Second operand has 47 states, 47 states have (on average 184.68085106382978) internal successors, (8680), 47 states have internal predecessors, (8680), 0 states have call successors, (0), 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 02:41:17,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:41:17,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 677 [2023-01-28 02:41:17,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:41:24,289 INFO L130 PetriNetUnfolder]: 22283/32058 cut-off events. [2023-01-28 02:41:24,289 INFO L131 PetriNetUnfolder]: For 287780/287780 co-relation queries the response was YES. [2023-01-28 02:41:24,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169764 conditions, 32058 events. 22283/32058 cut-off events. For 287780/287780 co-relation queries the response was YES. Maximal size of possible extension queue 1263. Compared 201679 event pairs, 1870 based on Foata normal form. 576/32634 useless extension candidates. Maximal degree in co-relation 169709. Up to 8390 conditions per place. [2023-01-28 02:41:24,732 INFO L137 encePairwiseOnDemand]: 657/677 looper letters, 502 selfloop transitions, 88 changer transitions 15/605 dead transitions. [2023-01-28 02:41:24,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 605 transitions, 6544 flow [2023-01-28 02:41:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 02:41:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 02:41:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4291 transitions. [2023-01-28 02:41:24,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28810259164764335 [2023-01-28 02:41:24,736 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4291 transitions. [2023-01-28 02:41:24,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4291 transitions. [2023-01-28 02:41:24,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:41:24,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4291 transitions. [2023-01-28 02:41:24,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 195.04545454545453) internal successors, (4291), 22 states have internal predecessors, (4291), 0 states have call successors, (0), 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 02:41:24,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 677.0) internal successors, (15571), 23 states have internal predecessors, (15571), 0 states have call successors, (0), 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 02:41:24,745 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 677.0) internal successors, (15571), 23 states have internal predecessors, (15571), 0 states have call successors, (0), 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 02:41:24,745 INFO L175 Difference]: Start difference. First operand has 175 places, 133 transitions, 1278 flow. Second operand 22 states and 4291 transitions. [2023-01-28 02:41:24,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 605 transitions, 6544 flow [2023-01-28 02:41:34,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 605 transitions, 6003 flow, removed 225 selfloop flow, removed 18 redundant places. [2023-01-28 02:41:34,726 INFO L231 Difference]: Finished difference. Result has 147 places, 198 transitions, 2110 flow [2023-01-28 02:41:34,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2110, PETRI_PLACES=147, PETRI_TRANSITIONS=198} [2023-01-28 02:41:34,726 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 109 predicate places. [2023-01-28 02:41:34,727 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 198 transitions, 2110 flow [2023-01-28 02:41:34,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 184.68085106382978) internal successors, (8680), 47 states have internal predecessors, (8680), 0 states have call successors, (0), 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 02:41:34,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:41:34,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:41:34,732 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 02:41:34,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:41:34,928 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:41:34,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:41:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1522311406, now seen corresponding path program 2 times [2023-01-28 02:41:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:41:34,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371419513] [2023-01-28 02:41:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:41:34,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:41:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:41:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:41:35,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:41:35,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371419513] [2023-01-28 02:41:35,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371419513] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:41:35,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851431263] [2023-01-28 02:41:35,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:41:35,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:41:35,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:41:35,414 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 02:41:35,415 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 02:41:35,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:41:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:41:35,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:41:35,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:41:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:41:35,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:41:36,299 INFO L321 Elim1Store]: treesize reduction 22, result has 75.0 percent of original size [2023-01-28 02:41:36,299 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 41 treesize of output 74 [2023-01-28 02:41:36,352 INFO L321 Elim1Store]: treesize reduction 22, result has 75.0 percent of original size [2023-01-28 02:41:36,352 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 41 treesize of output 74 [2023-01-28 02:41:36,479 INFO L321 Elim1Store]: treesize reduction 26, result has 87.3 percent of original size [2023-01-28 02:41:36,480 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 78 treesize of output 200 [2023-01-28 02:41:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 02:41:37,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851431263] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:41:37,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:41:37,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 37 [2023-01-28 02:41:37,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78785714] [2023-01-28 02:41:37,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:41:37,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 02:41:37,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:41:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 02:41:37,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 02:41:37,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 677 [2023-01-28 02:41:37,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 198 transitions, 2110 flow. Second operand has 37 states, 37 states have (on average 196.1891891891892) internal successors, (7259), 37 states have internal predecessors, (7259), 0 states have call successors, (0), 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 02:41:37,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:41:37,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 677 [2023-01-28 02:41:37,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:41:45,213 INFO L130 PetriNetUnfolder]: 33841/48436 cut-off events. [2023-01-28 02:41:45,213 INFO L131 PetriNetUnfolder]: For 262866/262866 co-relation queries the response was YES. [2023-01-28 02:41:45,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248537 conditions, 48436 events. 33841/48436 cut-off events. For 262866/262866 co-relation queries the response was YES. Maximal size of possible extension queue 1912. Compared 317935 event pairs, 9536 based on Foata normal form. 316/48752 useless extension candidates. Maximal degree in co-relation 248486. Up to 25574 conditions per place. [2023-01-28 02:41:45,661 INFO L137 encePairwiseOnDemand]: 659/677 looper letters, 474 selfloop transitions, 93 changer transitions 7/574 dead transitions. [2023-01-28 02:41:45,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 574 transitions, 6731 flow [2023-01-28 02:41:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 02:41:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 02:41:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3717 transitions. [2023-01-28 02:41:45,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3050221565731167 [2023-01-28 02:41:45,665 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3717 transitions. [2023-01-28 02:41:45,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3717 transitions. [2023-01-28 02:41:45,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:41:45,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3717 transitions. [2023-01-28 02:41:45,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 206.5) internal successors, (3717), 18 states have internal predecessors, (3717), 0 states have call successors, (0), 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 02:41:45,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 677.0) internal successors, (12863), 19 states have internal predecessors, (12863), 0 states have call successors, (0), 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 02:41:45,673 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 677.0) internal successors, (12863), 19 states have internal predecessors, (12863), 0 states have call successors, (0), 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 02:41:45,673 INFO L175 Difference]: Start difference. First operand has 147 places, 198 transitions, 2110 flow. Second operand 18 states and 3717 transitions. [2023-01-28 02:41:45,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 574 transitions, 6731 flow [2023-01-28 02:41:51,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 574 transitions, 6584 flow, removed 27 selfloop flow, removed 11 redundant places. [2023-01-28 02:41:51,631 INFO L231 Difference]: Finished difference. Result has 162 places, 271 transitions, 3185 flow [2023-01-28 02:41:51,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=677, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3185, PETRI_PLACES=162, PETRI_TRANSITIONS=271} [2023-01-28 02:41:51,632 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 124 predicate places. [2023-01-28 02:41:51,632 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 271 transitions, 3185 flow [2023-01-28 02:41:51,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 196.1891891891892) internal successors, (7259), 37 states have internal predecessors, (7259), 0 states have call successors, (0), 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 02:41:51,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:41:51,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:41:51,640 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 02:41:51,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:41:51,841 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 02:41:51,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:41:51,841 INFO L85 PathProgramCache]: Analyzing trace with hash 31784872, now seen corresponding path program 3 times [2023-01-28 02:41:51,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:41:51,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815796374] [2023-01-28 02:41:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:41:51,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:41:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:41:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:41:52,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:41:52,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815796374] [2023-01-28 02:41:52,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815796374] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:41:52,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64087528] [2023-01-28 02:41:52,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:41:52,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:41:52,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:41:52,581 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 02:41:52,584 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 02:41:52,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:41:52,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:41:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 02:41:52,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:41:53,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:41:53,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:41:53,129 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 02:41:53,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-01-28 02:41:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:41:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:41:53,190 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 02:41:53,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-01-28 02:41:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 02:41:53,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:41:54,450 INFO L321 Elim1Store]: treesize reduction 11, result has 95.6 percent of original size [2023-01-28 02:41:54,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 3328 treesize of output 3197 [2023-01-28 02:41:54,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:41:54,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1595 treesize of output 1492 [2023-01-28 02:41:54,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:41:54,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1467 treesize of output 1428 [2023-01-28 02:41:54,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:41:54,755 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 1403 treesize of output 1380 [2023-01-28 02:41:54,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:41:54,807 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 1371 treesize of output 1364 [2023-01-28 02:41:54,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:41:54,861 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 1355 treesize of output 1348 [2023-01-28 02:41:54,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:41:54,916 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 1339 treesize of output 1316 Received shutdown request... [2023-01-28 02:44:40,098 WARN L238 SmtUtils]: Removed 2 from assertion stack [2023-01-28 02:44:40,101 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 02:44:40,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 02:44:40,128 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 02:44:40,128 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 02:44:40,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:44:40,302 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 49ms.. [2023-01-28 02:44:40,304 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-28 02:44:40,304 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-28 02:44:40,304 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-28 02:44:40,304 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:44:40,310 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 02:44:40,310 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 02:44:40,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 02:44:40 BasicIcfg [2023-01-28 02:44:40,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 02:44:40,312 INFO L158 Benchmark]: Toolchain (without parser) took 833663.62ms. Allocated memory was 379.6MB in the beginning and 9.8GB in the end (delta: 9.4GB). Free memory was 348.3MB in the beginning and 3.4GB in the end (delta: -3.0GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. [2023-01-28 02:44:40,312 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory is still 212.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 02:44:40,312 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.84ms. Allocated memory is still 379.6MB. Free memory was 348.3MB in the beginning and 336.3MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 02:44:40,312 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.28ms. Allocated memory is still 379.6MB. Free memory was 336.3MB in the beginning and 333.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 02:44:40,313 INFO L158 Benchmark]: Boogie Preprocessor took 26.30ms. Allocated memory is still 379.6MB. Free memory was 333.7MB in the beginning and 331.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 02:44:40,313 INFO L158 Benchmark]: RCFGBuilder took 456.24ms. Allocated memory is still 379.6MB. Free memory was 331.6MB in the beginning and 306.4MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-01-28 02:44:40,313 INFO L158 Benchmark]: TraceAbstraction took 832972.37ms. Allocated memory was 379.6MB in the beginning and 9.8GB in the end (delta: 9.4GB). Free memory was 305.4MB in the beginning and 3.4GB in the end (delta: -3.1GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. [2023-01-28 02:44:40,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory is still 212.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 172.84ms. Allocated memory is still 379.6MB. Free memory was 348.3MB in the beginning and 336.3MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.28ms. Allocated memory is still 379.6MB. Free memory was 336.3MB in the beginning and 333.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.30ms. Allocated memory is still 379.6MB. Free memory was 333.7MB in the beginning and 331.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 456.24ms. Allocated memory is still 379.6MB. Free memory was 331.6MB in the beginning and 306.4MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 832972.37ms. Allocated memory was 379.6MB in the beginning and 9.8GB in the end (delta: 9.4GB). Free memory was 305.4MB in the beginning and 3.4GB in the end (delta: -3.1GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.1s, 292 PlacesBefore, 38 PlacesAfterwards, 311 TransitionsBefore, 36 TransitionsAfterwards, 14784 CoEnabledTransitionPairs, 7 FixpointIterations, 140 TrivialSequentialCompositions, 119 ConcurrentSequentialCompositions, 36 TrivialYvCompositions, 37 ConcurrentYvCompositions, 21 ChoiceCompositions, 353 TotalNumberOfCompositions, 16261 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 13526, independent: 13400, independent conditional: 0, independent unconditional: 13400, dependent: 126, dependent conditional: 0, dependent unconditional: 126, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 8611, independent: 8571, independent conditional: 0, independent unconditional: 8571, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 13526, independent: 4829, independent conditional: 0, independent unconditional: 4829, dependent: 86, dependent conditional: 0, dependent unconditional: 86, unknown: 8611, unknown conditional: 0, unknown unconditional: 8611] , Statistics on independence cache: Total cache size (in pairs): 132, Positive cache size: 122, Positive conditional cache size: 0, Positive unconditional cache size: 122, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 49ms.. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 49ms.. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 49ms.. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 49ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 419 locations, 4 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: 832.8s, OverallIterations: 27, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 107.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7287 SdHoareTripleChecker+Valid, 8.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7287 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 6.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 180 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15860 IncrementalHoareTripleChecker+Invalid, 16040 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 180 mSolverCounterUnsat, 0 mSDtfsCounter, 15860 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1156 GetRequests, 547 SyntacticMatches, 11 SemanticMatches, 598 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3682 ImplicationChecksByTransitivity, 11.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5602occurred in iteration=23, InterpolantAutomatonStates: 309, 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, 1.3s SatisfiabilityAnalysisTime, 543.4s InterpolantComputationTime, 1110 NumberOfCodeBlocks, 1098 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 1381 ConstructedInterpolants, 20 QuantifiedInterpolants, 17334 SizeOfPredicates, 425 NumberOfNonLiveVariables, 5156 ConjunctsInSsa, 399 ConjunctsInUnsatCore, 57 InterpolantComputations, 22 PerfectInterpolantSequences, 70/128 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