./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 29016034e4102bf62d4fcba069301a54da1d77dfd5739e4cf52e395ddaa22e38 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:03:55,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:03:55,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:03:55,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:03:55,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:03:55,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:03:55,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:03:55,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:03:55,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:03:55,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:03:55,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:03:55,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:03:55,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:03:55,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:03:55,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:03:55,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:03:55,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:03:55,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:03:55,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:03:55,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:03:55,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:03:55,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:03:55,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:03:55,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:03:55,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:03:55,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:03:55,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:03:55,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:03:55,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:03:55,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:03:55,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:03:55,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:03:55,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:03:55,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:03:55,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:03:55,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:03:55,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:03:55,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:03:55,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:03:55,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:03:55,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:03:55,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:03:55,223 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:03:55,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:03:55,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:03:55,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:03:55,226 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:03:55,226 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:03:55,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:03:55,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:03:55,227 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:03:55,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:03:55,228 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:03:55,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:03:55,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:03:55,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:03:55,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:03:55,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:03:55,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:03:55,230 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:03:55,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:03:55,230 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:03:55,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:03:55,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:03:55,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:03:55,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:03:55,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:03:55,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:03:55,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:03:55,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:03:55,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:03:55,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:03:55,232 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:03:55,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:03:55,233 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:03:55,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:03:55,233 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:03:55,233 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29016034e4102bf62d4fcba069301a54da1d77dfd5739e4cf52e395ddaa22e38 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 22:03:55,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:03:55,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:03:55,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:03:55,542 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:03:55,542 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:03:55,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2023-08-30 22:03:56,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:03:56,906 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:03:56,907 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2023-08-30 22:03:56,922 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017e15acd/e434c2d2ee214b2c849fb4c67052eb9f/FLAG10642ff35 [2023-08-30 22:03:56,935 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017e15acd/e434c2d2ee214b2c849fb4c67052eb9f [2023-08-30 22:03:56,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:03:56,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:03:56,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:03:56,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:03:56,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:03:56,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:03:56" (1/1) ... [2023-08-30 22:03:56,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc724dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:56, skipping insertion in model container [2023-08-30 22:03:56,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:03:56" (1/1) ... [2023-08-30 22:03:56,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:03:56,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:03:57,407 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i[39757,39770] [2023-08-30 22:03:57,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:03:57,430 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:03:57,485 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i[39757,39770] [2023-08-30 22:03:57,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:03:57,547 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:03:57,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57 WrapperNode [2023-08-30 22:03:57,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:03:57,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:03:57,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:03:57,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:03:57,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (1/1) ... [2023-08-30 22:03:57,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (1/1) ... [2023-08-30 22:03:57,607 INFO L138 Inliner]: procedures = 243, calls = 50, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2023-08-30 22:03:57,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:03:57,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:03:57,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:03:57,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:03:57,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (1/1) ... [2023-08-30 22:03:57,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (1/1) ... [2023-08-30 22:03:57,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (1/1) ... [2023-08-30 22:03:57,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (1/1) ... [2023-08-30 22:03:57,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (1/1) ... [2023-08-30 22:03:57,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (1/1) ... [2023-08-30 22:03:57,657 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (1/1) ... [2023-08-30 22:03:57,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (1/1) ... [2023-08-30 22:03:57,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:03:57,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:03:57,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:03:57,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:03:57,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (1/1) ... [2023-08-30 22:03:57,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:03:57,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:03:57,706 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) [2023-08-30 22:03:57,729 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 [2023-08-30 22:03:57,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:03:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:03:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-30 22:03:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 22:03:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 22:03:57,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 22:03:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 22:03:57,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 22:03:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:03:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 22:03:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:03:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:03:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:03:57,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:03:57,747 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 22:03:57,957 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:03:57,958 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:03:58,190 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:03:58,197 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:03:58,197 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 22:03:58,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:03:58 BoogieIcfgContainer [2023-08-30 22:03:58,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:03:58,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:03:58,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:03:58,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:03:58,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:03:56" (1/3) ... [2023-08-30 22:03:58,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342136b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:03:58, skipping insertion in model container [2023-08-30 22:03:58,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:03:57" (2/3) ... [2023-08-30 22:03:58,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342136b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:03:58, skipping insertion in model container [2023-08-30 22:03:58,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:03:58" (3/3) ... [2023-08-30 22:03:58,206 INFO L112 eAbstractionObserver]: Analyzing ICFG arithmetic_prog_ok.i [2023-08-30 22:03:58,212 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:03:58,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:03:58,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 22:03:58,221 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:03:58,276 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 22:03:58,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 131 transitions, 278 flow [2023-08-30 22:03:58,358 INFO L130 PetriNetUnfolder]: 10/129 cut-off events. [2023-08-30 22:03:58,359 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:03:58,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 10/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 140 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 82. Up to 3 conditions per place. [2023-08-30 22:03:58,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 131 transitions, 278 flow [2023-08-30 22:03:58,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 118 transitions, 248 flow [2023-08-30 22:03:58,370 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:03:58,378 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 118 transitions, 248 flow [2023-08-30 22:03:58,380 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 118 transitions, 248 flow [2023-08-30 22:03:58,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 118 transitions, 248 flow [2023-08-30 22:03:58,404 INFO L130 PetriNetUnfolder]: 8/118 cut-off events. [2023-08-30 22:03:58,404 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:03:58,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 8/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-30 22:03:58,407 INFO L119 LiptonReduction]: Number of co-enabled transitions 1922 [2023-08-30 22:04:03,190 INFO L134 LiptonReduction]: Checked pairs total: 4363 [2023-08-30 22:04:03,191 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-30 22:04:03,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:04:03,208 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=true, 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;@359baee3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:04:03,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 22:04:03,217 INFO L130 PetriNetUnfolder]: 5/29 cut-off events. [2023-08-30 22:04:03,217 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:04:03,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:03,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:03,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:04:03,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:03,222 INFO L85 PathProgramCache]: Analyzing trace with hash -616360160, now seen corresponding path program 1 times [2023-08-30 22:04:03,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:03,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760625751] [2023-08-30 22:04:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:03,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:03,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:03,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760625751] [2023-08-30 22:04:03,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760625751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:03,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:03,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:04:03,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866496025] [2023-08-30 22:04:03,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:03,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:03,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:03,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:03,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:03,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 224 [2023-08-30 22:04:03,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:03,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:03,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 224 [2023-08-30 22:04:03,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:03,660 INFO L130 PetriNetUnfolder]: 219/470 cut-off events. [2023-08-30 22:04:03,660 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 22:04:03,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 470 events. 219/470 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2196 event pairs, 87 based on Foata normal form. 28/432 useless extension candidates. Maximal degree in co-relation 772. Up to 225 conditions per place. [2023-08-30 22:04:03,665 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 34 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-30 22:04:03,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 173 flow [2023-08-30 22:04:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-08-30 22:04:03,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2023-08-30 22:04:03,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-08-30 22:04:03,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-08-30 22:04:03,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:03,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-08-30 22:04:03,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:03,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:03,690 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:03,691 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 72 flow. Second operand 3 states and 390 transitions. [2023-08-30 22:04:03,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 173 flow [2023-08-30 22:04:03,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 163 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 22:04:03,696 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 74 flow [2023-08-30 22:04:03,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2023-08-30 22:04:03,700 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-30 22:04:03,701 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 74 flow [2023-08-30 22:04:03,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:03,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:03,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:03,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:04:03,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:04:03,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:03,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2115918277, now seen corresponding path program 1 times [2023-08-30 22:04:03,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:03,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667127638] [2023-08-30 22:04:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:03,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:03,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:03,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667127638] [2023-08-30 22:04:03,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667127638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:03,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:03,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:04:03,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27277434] [2023-08-30 22:04:03,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:03,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:03,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:03,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:03,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:03,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 224 [2023-08-30 22:04:03,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:03,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:03,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 224 [2023-08-30 22:04:03,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:03,996 INFO L130 PetriNetUnfolder]: 357/694 cut-off events. [2023-08-30 22:04:03,997 INFO L131 PetriNetUnfolder]: For 123/123 co-relation queries the response was YES. [2023-08-30 22:04:04,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1373 conditions, 694 events. 357/694 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3192 event pairs, 141 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 442. Up to 347 conditions per place. [2023-08-30 22:04:04,005 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-30 22:04:04,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 45 transitions, 191 flow [2023-08-30 22:04:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:04,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-08-30 22:04:04,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2023-08-30 22:04:04,010 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-08-30 22:04:04,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-08-30 22:04:04,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:04,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-08-30 22:04:04,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:04,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:04,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:04,017 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 74 flow. Second operand 3 states and 388 transitions. [2023-08-30 22:04:04,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 45 transitions, 191 flow [2023-08-30 22:04:04,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:04:04,019 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 84 flow [2023-08-30 22:04:04,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-30 22:04:04,020 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-08-30 22:04:04,020 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 84 flow [2023-08-30 22:04:04,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:04,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:04,021 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] [2023-08-30 22:04:04,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:04:04,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:04:04,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:04,024 INFO L85 PathProgramCache]: Analyzing trace with hash 26892520, now seen corresponding path program 1 times [2023-08-30 22:04:04,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:04,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941070131] [2023-08-30 22:04:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:04,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:04,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:04,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941070131] [2023-08-30 22:04:04,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941070131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:04,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:04,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:04:04,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004158679] [2023-08-30 22:04:04,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:04,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:04,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:04,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:04,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:04,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 224 [2023-08-30 22:04:04,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:04,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:04,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 224 [2023-08-30 22:04:04,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:04,353 INFO L130 PetriNetUnfolder]: 309/688 cut-off events. [2023-08-30 22:04:04,354 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-08-30 22:04:04,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 688 events. 309/688 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3367 event pairs, 105 based on Foata normal form. 80/740 useless extension candidates. Maximal degree in co-relation 413. Up to 316 conditions per place. [2023-08-30 22:04:04,357 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 25 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-08-30 22:04:04,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 183 flow [2023-08-30 22:04:04,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-30 22:04:04,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2023-08-30 22:04:04,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-30 22:04:04,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-30 22:04:04,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:04,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-30 22:04:04,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:04,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:04,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:04,363 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 84 flow. Second operand 3 states and 370 transitions. [2023-08-30 22:04:04,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 183 flow [2023-08-30 22:04:04,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:04:04,367 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 102 flow [2023-08-30 22:04:04,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-30 22:04:04,368 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-30 22:04:04,369 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 102 flow [2023-08-30 22:04:04,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:04,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:04,369 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] [2023-08-30 22:04:04,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:04:04,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:04:04,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1826989588, now seen corresponding path program 2 times [2023-08-30 22:04:04,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:04,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772546382] [2023-08-30 22:04:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:04,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:04,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:04,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772546382] [2023-08-30 22:04:04,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772546382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:04:04,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556417869] [2023-08-30 22:04:04,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 22:04:04,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:04,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:04,467 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) [2023-08-30 22:04:04,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 22:04:04,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 22:04:04,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:04:04,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 22:04:04,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:04,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:04:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:04,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556417869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:04:04,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:04:04,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-30 22:04:04,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767884544] [2023-08-30 22:04:04,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:04:04,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 22:04:04,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:04,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 22:04:04,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 22:04:04,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 224 [2023-08-30 22:04:04,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:04,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:04,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 224 [2023-08-30 22:04:04,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:05,103 INFO L130 PetriNetUnfolder]: 631/1544 cut-off events. [2023-08-30 22:04:05,103 INFO L131 PetriNetUnfolder]: For 432/438 co-relation queries the response was YES. [2023-08-30 22:04:05,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3485 conditions, 1544 events. 631/1544 cut-off events. For 432/438 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 8646 event pairs, 42 based on Foata normal form. 134/1608 useless extension candidates. Maximal degree in co-relation 843. Up to 306 conditions per place. [2023-08-30 22:04:05,111 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 141 selfloop transitions, 33 changer transitions 0/181 dead transitions. [2023-08-30 22:04:05,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 181 transitions, 978 flow [2023-08-30 22:04:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 22:04:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 22:04:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1980 transitions. [2023-08-30 22:04:05,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524553571428571 [2023-08-30 22:04:05,117 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1980 transitions. [2023-08-30 22:04:05,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1980 transitions. [2023-08-30 22:04:05,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:05,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1980 transitions. [2023-08-30 22:04:05,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 123.75) internal successors, (1980), 16 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:05,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 224.0) internal successors, (3808), 17 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:05,130 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 224.0) internal successors, (3808), 17 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:05,131 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 102 flow. Second operand 16 states and 1980 transitions. [2023-08-30 22:04:05,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 181 transitions, 978 flow [2023-08-30 22:04:05,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 181 transitions, 892 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 22:04:05,136 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 388 flow [2023-08-30 22:04:05,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=388, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2023-08-30 22:04:05,137 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 29 predicate places. [2023-08-30 22:04:05,137 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 388 flow [2023-08-30 22:04:05,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:05,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:05,138 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:05,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 22:04:05,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:05,344 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:04:05,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:05,345 INFO L85 PathProgramCache]: Analyzing trace with hash 734167052, now seen corresponding path program 3 times [2023-08-30 22:04:05,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:05,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190899738] [2023-08-30 22:04:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:05,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-08-30 22:04:05,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:05,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190899738] [2023-08-30 22:04:05,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190899738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:04:05,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188019612] [2023-08-30 22:04:05,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 22:04:05,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:05,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:05,435 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) [2023-08-30 22:04:05,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 22:04:05,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 22:04:05,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:04:05,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 22:04:05,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-08-30 22:04:05,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:05,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188019612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:05,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 22:04:05,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-08-30 22:04:05,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528653090] [2023-08-30 22:04:05,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:05,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:04:05,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:04:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 22:04:05,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 224 [2023-08-30 22:04:05,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 388 flow. Second operand has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:05,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:05,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 224 [2023-08-30 22:04:05,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:05,957 INFO L130 PetriNetUnfolder]: 977/2068 cut-off events. [2023-08-30 22:04:05,957 INFO L131 PetriNetUnfolder]: For 5067/5067 co-relation queries the response was YES. [2023-08-30 22:04:05,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6004 conditions, 2068 events. 977/2068 cut-off events. For 5067/5067 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 11076 event pairs, 191 based on Foata normal form. 0/1904 useless extension candidates. Maximal degree in co-relation 4606. Up to 785 conditions per place. [2023-08-30 22:04:05,970 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 98 selfloop transitions, 8 changer transitions 1/110 dead transitions. [2023-08-30 22:04:05,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 902 flow [2023-08-30 22:04:05,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 22:04:05,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 22:04:05,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 618 transitions. [2023-08-30 22:04:05,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517857142857143 [2023-08-30 22:04:05,973 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 618 transitions. [2023-08-30 22:04:05,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 618 transitions. [2023-08-30 22:04:05,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:05,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 618 transitions. [2023-08-30 22:04:05,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:05,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:05,977 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:05,978 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 388 flow. Second operand 5 states and 618 transitions. [2023-08-30 22:04:05,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 902 flow [2023-08-30 22:04:05,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 110 transitions, 835 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-30 22:04:05,993 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 398 flow [2023-08-30 22:04:05,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2023-08-30 22:04:05,996 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 35 predicate places. [2023-08-30 22:04:05,996 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 398 flow [2023-08-30 22:04:05,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:05,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:05,997 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:06,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 22:04:06,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:06,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:04:06,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1347316854, now seen corresponding path program 4 times [2023-08-30 22:04:06,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:06,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052117907] [2023-08-30 22:04:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:06,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 22:04:06,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:06,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052117907] [2023-08-30 22:04:06,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052117907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:04:06,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127656711] [2023-08-30 22:04:06,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 22:04:06,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:06,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:06,312 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) [2023-08-30 22:04:06,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 22:04:06,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 22:04:06,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:04:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 22:04:06,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 22:04:06,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:04:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 22:04:06,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127656711] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:04:06,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:04:06,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-08-30 22:04:06,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834164448] [2023-08-30 22:04:06,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:04:06,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 22:04:06,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:06,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 22:04:06,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 22:04:06,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 224 [2023-08-30 22:04:06,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:06,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:06,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 224 [2023-08-30 22:04:06,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:06,886 INFO L130 PetriNetUnfolder]: 1019/2398 cut-off events. [2023-08-30 22:04:06,886 INFO L131 PetriNetUnfolder]: For 7109/7133 co-relation queries the response was YES. [2023-08-30 22:04:06,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7400 conditions, 2398 events. 1019/2398 cut-off events. For 7109/7133 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 14058 event pairs, 168 based on Foata normal form. 118/2506 useless extension candidates. Maximal degree in co-relation 6062. Up to 436 conditions per place. [2023-08-30 22:04:06,902 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 95 selfloop transitions, 17 changer transitions 0/123 dead transitions. [2023-08-30 22:04:06,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 123 transitions, 976 flow [2023-08-30 22:04:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:04:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:04:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 767 transitions. [2023-08-30 22:04:06,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706845238095238 [2023-08-30 22:04:06,906 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 767 transitions. [2023-08-30 22:04:06,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 767 transitions. [2023-08-30 22:04:06,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:06,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 767 transitions. [2023-08-30 22:04:06,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.83333333333333) internal successors, (767), 6 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:06,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:06,910 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:06,911 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 398 flow. Second operand 6 states and 767 transitions. [2023-08-30 22:04:06,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 123 transitions, 976 flow [2023-08-30 22:04:06,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 976 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 22:04:06,924 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 469 flow [2023-08-30 22:04:06,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2023-08-30 22:04:06,927 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 43 predicate places. [2023-08-30 22:04:06,927 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 469 flow [2023-08-30 22:04:06,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:06,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:06,928 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:06,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:07,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:07,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:04:07,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:07,135 INFO L85 PathProgramCache]: Analyzing trace with hash 804205986, now seen corresponding path program 5 times [2023-08-30 22:04:07,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:07,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263122470] [2023-08-30 22:04:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:07,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-08-30 22:04:07,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:07,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263122470] [2023-08-30 22:04:07,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263122470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:07,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:04:07,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 22:04:07,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403176062] [2023-08-30 22:04:07,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:07,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:04:07,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:07,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:04:07,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:04:07,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 224 [2023-08-30 22:04:07,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 469 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:07,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:07,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 224 [2023-08-30 22:04:07,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:07,455 INFO L130 PetriNetUnfolder]: 748/1739 cut-off events. [2023-08-30 22:04:07,455 INFO L131 PetriNetUnfolder]: For 5925/5933 co-relation queries the response was YES. [2023-08-30 22:04:07,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5990 conditions, 1739 events. 748/1739 cut-off events. For 5925/5933 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9454 event pairs, 193 based on Foata normal form. 80/1810 useless extension candidates. Maximal degree in co-relation 5231. Up to 1150 conditions per place. [2023-08-30 22:04:07,469 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 53 selfloop transitions, 3 changer transitions 3/65 dead transitions. [2023-08-30 22:04:07,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 65 transitions, 536 flow [2023-08-30 22:04:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:04:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:04:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-30 22:04:07,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669642857142857 [2023-08-30 22:04:07,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-30 22:04:07,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-30 22:04:07,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:07,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-30 22:04:07,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:07,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:07,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:07,475 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 469 flow. Second operand 3 states and 381 transitions. [2023-08-30 22:04:07,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 65 transitions, 536 flow [2023-08-30 22:04:07,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 508 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-30 22:04:07,487 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 336 flow [2023-08-30 22:04:07,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-08-30 22:04:07,488 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2023-08-30 22:04:07,488 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 336 flow [2023-08-30 22:04:07,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:07,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:07,489 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:07,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 22:04:07,489 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:04:07,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:07,490 INFO L85 PathProgramCache]: Analyzing trace with hash 350347520, now seen corresponding path program 6 times [2023-08-30 22:04:07,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:07,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426046500] [2023-08-30 22:04:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:07,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-30 22:04:07,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:07,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426046500] [2023-08-30 22:04:07,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426046500] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:04:07,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461736368] [2023-08-30 22:04:07,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 22:04:07,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:07,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:07,705 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) [2023-08-30 22:04:07,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 22:04:07,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 22:04:07,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:04:07,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 22:04:07,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-30 22:04:07,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 22:04:07,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461736368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:04:07,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 22:04:07,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2023-08-30 22:04:07,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284220636] [2023-08-30 22:04:07,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:04:07,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 22:04:07,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:07,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 22:04:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 22:04:07,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 224 [2023-08-30 22:04:07,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:07,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:07,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 224 [2023-08-30 22:04:07,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:08,193 INFO L130 PetriNetUnfolder]: 709/1544 cut-off events. [2023-08-30 22:04:08,193 INFO L131 PetriNetUnfolder]: For 3668/3668 co-relation queries the response was YES. [2023-08-30 22:04:08,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 1544 events. 709/1544 cut-off events. For 3668/3668 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7322 event pairs, 185 based on Foata normal form. 34/1578 useless extension candidates. Maximal degree in co-relation 3165. Up to 668 conditions per place. [2023-08-30 22:04:08,204 INFO L137 encePairwiseOnDemand]: 215/224 looper letters, 69 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2023-08-30 22:04:08,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 652 flow [2023-08-30 22:04:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:04:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:04:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2023-08-30 22:04:08,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2023-08-30 22:04:08,207 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2023-08-30 22:04:08,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2023-08-30 22:04:08,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:08,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2023-08-30 22:04:08,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:08,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:08,213 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:08,213 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 336 flow. Second operand 6 states and 708 transitions. [2023-08-30 22:04:08,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 652 flow [2023-08-30 22:04:08,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 81 transitions, 646 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 22:04:08,224 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 380 flow [2023-08-30 22:04:08,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=380, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2023-08-30 22:04:08,225 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2023-08-30 22:04:08,226 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 380 flow [2023-08-30 22:04:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:08,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:08,226 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:08,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:08,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:08,433 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:04:08,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:08,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1529417168, now seen corresponding path program 7 times [2023-08-30 22:04:08,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:08,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672641967] [2023-08-30 22:04:08,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:08,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-30 22:04:08,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:08,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672641967] [2023-08-30 22:04:08,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672641967] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:04:08,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801198747] [2023-08-30 22:04:08,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 22:04:08,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:08,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:08,766 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) [2023-08-30 22:04:08,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 22:04:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:08,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 22:04:08,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 22:04:09,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:04:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 22:04:09,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801198747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:04:09,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:04:09,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 9 [2023-08-30 22:04:09,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994244533] [2023-08-30 22:04:09,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:04:09,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 22:04:09,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:09,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 22:04:09,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 22:04:09,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 224 [2023-08-30 22:04:09,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 380 flow. Second operand has 10 states, 10 states have (on average 114.1) internal successors, (1141), 10 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:09,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:09,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 224 [2023-08-30 22:04:09,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:09,392 INFO L130 PetriNetUnfolder]: 375/832 cut-off events. [2023-08-30 22:04:09,393 INFO L131 PetriNetUnfolder]: For 2487/2487 co-relation queries the response was YES. [2023-08-30 22:04:09,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 832 events. 375/832 cut-off events. For 2487/2487 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2946 event pairs, 104 based on Foata normal form. 28/860 useless extension candidates. Maximal degree in co-relation 1449. Up to 351 conditions per place. [2023-08-30 22:04:09,399 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 61 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2023-08-30 22:04:09,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 586 flow [2023-08-30 22:04:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 22:04:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 22:04:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 706 transitions. [2023-08-30 22:04:09,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252976190476191 [2023-08-30 22:04:09,402 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 706 transitions. [2023-08-30 22:04:09,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 706 transitions. [2023-08-30 22:04:09,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:09,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 706 transitions. [2023-08-30 22:04:09,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:09,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:09,407 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:09,408 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 380 flow. Second operand 6 states and 706 transitions. [2023-08-30 22:04:09,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 586 flow [2023-08-30 22:04:09,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 530 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-08-30 22:04:09,413 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 283 flow [2023-08-30 22:04:09,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2023-08-30 22:04:09,414 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 37 predicate places. [2023-08-30 22:04:09,414 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 283 flow [2023-08-30 22:04:09,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.1) internal successors, (1141), 10 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:09,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:04:09,415 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:04:09,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 22:04:09,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:09,622 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:04:09,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:04:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1103703702, now seen corresponding path program 8 times [2023-08-30 22:04:09,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:04:09,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367193908] [2023-08-30 22:04:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:04:09,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:04:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:04:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:10,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:04:10,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367193908] [2023-08-30 22:04:10,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367193908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:04:10,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139406261] [2023-08-30 22:04:10,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 22:04:10,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:10,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:04:10,090 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) [2023-08-30 22:04:10,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 22:04:10,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 22:04:10,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:04:10,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 22:04:10,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:04:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:10,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:04:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 22:04:13,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139406261] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:04:13,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:04:13,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2023-08-30 22:04:13,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768752573] [2023-08-30 22:04:13,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:04:13,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 22:04:13,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:04:13,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 22:04:13,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2023-08-30 22:04:14,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 224 [2023-08-30 22:04:14,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 283 flow. Second operand has 31 states, 31 states have (on average 113.54838709677419) internal successors, (3520), 31 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:14,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:04:14,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 224 [2023-08-30 22:04:14,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:04:15,232 INFO L130 PetriNetUnfolder]: 255/668 cut-off events. [2023-08-30 22:04:15,232 INFO L131 PetriNetUnfolder]: For 1337/1343 co-relation queries the response was YES. [2023-08-30 22:04:15,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2254 conditions, 668 events. 255/668 cut-off events. For 1337/1343 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2409 event pairs, 23 based on Foata normal form. 22/688 useless extension candidates. Maximal degree in co-relation 1184. Up to 118 conditions per place. [2023-08-30 22:04:15,235 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2023-08-30 22:04:15,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 742 flow [2023-08-30 22:04:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 22:04:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 22:04:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1401 transitions. [2023-08-30 22:04:15,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212053571428571 [2023-08-30 22:04:15,242 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1401 transitions. [2023-08-30 22:04:15,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1401 transitions. [2023-08-30 22:04:15,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:04:15,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1401 transitions. [2023-08-30 22:04:15,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 116.75) internal successors, (1401), 12 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:15,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:15,251 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:15,252 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 283 flow. Second operand 12 states and 1401 transitions. [2023-08-30 22:04:15,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 742 flow [2023-08-30 22:04:15,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 98 transitions, 700 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 22:04:15,256 INFO L231 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2023-08-30 22:04:15,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2023-08-30 22:04:15,257 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2023-08-30 22:04:15,258 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2023-08-30 22:04:15,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 113.54838709677419) internal successors, (3520), 31 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:04:15,261 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 22:04:15,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-30 22:04:15,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-30 22:04:15,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 22:04:15,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:04:15,469 INFO L445 BasicCegarLoop]: Path program histogram: [8, 1, 1] [2023-08-30 22:04:15,471 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 22:04:15,471 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 22:04:15,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 10:04:15 BasicIcfg [2023-08-30 22:04:15,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 22:04:15,474 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 22:04:15,474 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 22:04:15,474 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 22:04:15,474 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:03:58" (3/4) ... [2023-08-30 22:04:15,476 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 22:04:15,481 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-30 22:04:15,482 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-30 22:04:15,487 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-08-30 22:04:15,487 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-08-30 22:04:15,488 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-30 22:04:15,488 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 22:04:15,523 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 22:04:15,523 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 22:04:15,523 INFO L158 Benchmark]: Toolchain (without parser) took 18584.11ms. Allocated memory was 94.4MB in the beginning and 274.7MB in the end (delta: 180.4MB). Free memory was 71.4MB in the beginning and 192.2MB in the end (delta: -120.8MB). Peak memory consumption was 60.9MB. Max. memory is 16.1GB. [2023-08-30 22:04:15,524 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 47.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 22:04:15,524 INFO L158 Benchmark]: CACSL2BoogieTranslator took 606.97ms. Allocated memory is still 94.4MB. Free memory was 71.0MB in the beginning and 44.0MB in the end (delta: 27.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-08-30 22:04:15,524 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.46ms. Allocated memory is still 94.4MB. Free memory was 44.0MB in the beginning and 41.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 22:04:15,524 INFO L158 Benchmark]: Boogie Preprocessor took 57.59ms. Allocated memory is still 94.4MB. Free memory was 41.5MB in the beginning and 39.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 22:04:15,525 INFO L158 Benchmark]: RCFGBuilder took 533.18ms. Allocated memory is still 94.4MB. Free memory was 39.8MB in the beginning and 62.2MB in the end (delta: -22.4MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2023-08-30 22:04:15,525 INFO L158 Benchmark]: TraceAbstraction took 17272.44ms. Allocated memory was 94.4MB in the beginning and 274.7MB in the end (delta: 180.4MB). Free memory was 61.7MB in the beginning and 194.7MB in the end (delta: -133.0MB). Peak memory consumption was 170.6MB. Max. memory is 16.1GB. [2023-08-30 22:04:15,525 INFO L158 Benchmark]: Witness Printer took 49.27ms. Allocated memory is still 274.7MB. Free memory was 194.7MB in the beginning and 192.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 22:04:15,527 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 47.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 606.97ms. Allocated memory is still 94.4MB. Free memory was 71.0MB in the beginning and 44.0MB in the end (delta: 27.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.46ms. Allocated memory is still 94.4MB. Free memory was 44.0MB in the beginning and 41.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.59ms. Allocated memory is still 94.4MB. Free memory was 41.5MB in the beginning and 39.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 533.18ms. Allocated memory is still 94.4MB. Free memory was 39.8MB in the beginning and 62.2MB in the end (delta: -22.4MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. * TraceAbstraction took 17272.44ms. Allocated memory was 94.4MB in the beginning and 274.7MB in the end (delta: 180.4MB). Free memory was 61.7MB in the beginning and 194.7MB in the end (delta: -133.0MB). Peak memory consumption was 170.6MB. Max. memory is 16.1GB. * Witness Printer took 49.27ms. Allocated memory is still 274.7MB. Free memory was 194.7MB in the beginning and 192.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.8s, 117 PlacesBefore, 32 PlacesAfterwards, 118 TransitionsBefore, 30 TransitionsAfterwards, 1922 CoEnabledTransitionPairs, 7 FixpointIterations, 53 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 93 TotalNumberOfCompositions, 4363 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2172, independent: 2001, independent conditional: 0, independent unconditional: 2001, dependent: 171, dependent conditional: 0, dependent unconditional: 171, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1031, independent: 1001, independent conditional: 0, independent unconditional: 1001, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2172, independent: 1000, independent conditional: 0, independent unconditional: 1000, dependent: 141, dependent conditional: 0, dependent unconditional: 141, unknown: 1031, unknown conditional: 0, unknown unconditional: 1031] , Statistics on independence cache: Total cache size (in pairs): 118, Positive cache size: 105, Positive conditional cache size: 0, Positive unconditional cache size: 105, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 919]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 167 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17.2s, OverallIterations: 10, TraceHistogramMax: 4, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 673 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 574 mSDsluCounter, 101 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 66 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3064 IncrementalHoareTripleChecker+Invalid, 3130 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 66 mSolverCounterUnsat, 37 mSDtfsCounter, 3064 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 513 GetRequests, 411 SyntacticMatches, 22 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=469occurred in iteration=6, InterpolantAutomatonStates: 63, 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: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 643 NumberOfCodeBlocks, 617 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 795 ConstructedInterpolants, 42 QuantifiedInterpolants, 5051 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1811 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 532/826 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 22:04:15,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE