./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack-1.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/stack-1.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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --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 16:11:09,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:11:09,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:11:09,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:11:09,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:11:09,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:11:09,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:11:09,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:11:09,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:11:09,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:11:09,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:11:09,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:11:09,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:11:09,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:11:09,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:11:09,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:11:09,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:11:09,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:11:09,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:11:09,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:11:09,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:11:09,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:11:09,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:11:09,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:11:09,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:11:09,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:11:09,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:11:09,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:11:09,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:11:09,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:11:09,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:11:09,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:11:09,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:11:09,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:11:09,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:11:09,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:11:09,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:11:09,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:11:09,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:11:09,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:11:09,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:11:09,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:11:09,361 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:11:09,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:11:09,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:11:09,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:11:09,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:11:09,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:11:09,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:11:09,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:11:09,365 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:11:09,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:11:09,366 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:11:09,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:11:09,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:11:09,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:11:09,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:11:09,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:11:09,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:11:09,367 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:11:09,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:11:09,368 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:11:09,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:11:09,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:11:09,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:11:09,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:11:09,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:11:09,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:11:09,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:11:09,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:11:09,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:11:09,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:11:09,370 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:11:09,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:11:09,371 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:11:09,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:11:09,371 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:11:09,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:11:09,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:11:09,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:11:09,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:11:09,683 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:11:09,683 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:11:09,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2023-08-30 16:11:10,873 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:11:11,181 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:11:11,182 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2023-08-30 16:11:11,197 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7325e6cc4/a59364c314e5400797f9cc8e160e08cc/FLAGb6a6080de [2023-08-30 16:11:11,208 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7325e6cc4/a59364c314e5400797f9cc8e160e08cc [2023-08-30 16:11:11,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:11:11,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:11:11,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:11:11,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:11:11,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:11:11,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b94a7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11, skipping insertion in model container [2023-08-30 16:11:11,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:11:11,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:11:11,692 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/stack-1.i[41520,41533] [2023-08-30 16:11:11,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:11:11,740 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:11:11,779 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/stack-1.i[41520,41533] [2023-08-30 16:11:11,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:11:11,867 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:11:11,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11 WrapperNode [2023-08-30 16:11:11,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:11:11,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:11:11,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:11:11,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:11:11,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,932 INFO L138 Inliner]: procedures = 277, calls = 43, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 153 [2023-08-30 16:11:11,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:11:11,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:11:11,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:11:11,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:11:11,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,973 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:11:11,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:11:11,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:11:11,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:11:11,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (1/1) ... [2023-08-30 16:11:11,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:11:11,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:11:12,010 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 16:11:12,025 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 16:11:12,053 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 16:11:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 16:11:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 16:11:12,054 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 16:11:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:11:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:11:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:11:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:11:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 16:11:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:11:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:11:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:11:12,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:11:12,056 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 16:11:12,243 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:11:12,245 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:11:12,492 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:11:12,499 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:11:12,503 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 16:11:12,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:11:12 BoogieIcfgContainer [2023-08-30 16:11:12,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:11:12,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:11:12,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:11:12,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:11:12,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:11:11" (1/3) ... [2023-08-30 16:11:12,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad3554a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:11:12, skipping insertion in model container [2023-08-30 16:11:12,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:11:11" (2/3) ... [2023-08-30 16:11:12,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad3554a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:11:12, skipping insertion in model container [2023-08-30 16:11:12,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:11:12" (3/3) ... [2023-08-30 16:11:12,513 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2023-08-30 16:11:12,520 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:11:12,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:11:12,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 16:11:12,528 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:11:12,624 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 16:11:12,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 155 transitions, 326 flow [2023-08-30 16:11:12,707 INFO L130 PetriNetUnfolder]: 10/153 cut-off events. [2023-08-30 16:11:12,707 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:11:12,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 10/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 348 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-08-30 16:11:12,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 155 transitions, 326 flow [2023-08-30 16:11:12,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 144 transitions, 297 flow [2023-08-30 16:11:12,721 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:11:12,728 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 144 transitions, 297 flow [2023-08-30 16:11:12,731 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 144 transitions, 297 flow [2023-08-30 16:11:12,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 144 transitions, 297 flow [2023-08-30 16:11:12,764 INFO L130 PetriNetUnfolder]: 10/144 cut-off events. [2023-08-30 16:11:12,766 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:11:12,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 144 events. 10/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 309 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2023-08-30 16:11:12,773 INFO L119 LiptonReduction]: Number of co-enabled transitions 6492 [2023-08-30 16:11:16,246 INFO L134 LiptonReduction]: Checked pairs total: 8991 [2023-08-30 16:11:16,246 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-30 16:11:16,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:11:16,262 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;@35fd430c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:11:16,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 16:11:16,266 INFO L130 PetriNetUnfolder]: 1/13 cut-off events. [2023-08-30 16:11:16,266 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 16:11:16,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:16,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 16:11:16,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:11:16,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:16,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1268975004, now seen corresponding path program 1 times [2023-08-30 16:11:16,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:16,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291738947] [2023-08-30 16:11:16,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:16,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:16,572 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 16:11:16,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:16,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291738947] [2023-08-30 16:11:16,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291738947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:11:16,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:11:16,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:11:16,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426943070] [2023-08-30 16:11:16,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:11:16,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:11:16,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:16,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:11:16,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:11:16,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-08-30 16:11:16,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 16:11:16,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:16,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-08-30 16:11:16,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:16,792 INFO L130 PetriNetUnfolder]: 568/973 cut-off events. [2023-08-30 16:11:16,792 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2023-08-30 16:11:16,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1956 conditions, 973 events. 568/973 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3785 event pairs, 234 based on Foata normal form. 0/762 useless extension candidates. Maximal degree in co-relation 1776. Up to 575 conditions per place. [2023-08-30 16:11:16,802 INFO L137 encePairwiseOnDemand]: 285/290 looper letters, 47 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-30 16:11:16,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 52 transitions, 219 flow [2023-08-30 16:11:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:11:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:11:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-30 16:11:16,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532183908045977 [2023-08-30 16:11:16,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-30 16:11:16,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-30 16:11:16,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:11:16,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-30 16:11:16,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 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 16:11:16,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 16:11:16,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 16:11:16,839 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 463 transitions. [2023-08-30 16:11:16,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 52 transitions, 219 flow [2023-08-30 16:11:16,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 52 transitions, 211 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 16:11:16,844 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2023-08-30 16:11:16,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-08-30 16:11:16,849 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-08-30 16:11:16,849 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2023-08-30 16:11:16,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 16:11:16,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:16,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:11:16,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:11:16,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:11:16,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:16,852 INFO L85 PathProgramCache]: Analyzing trace with hash -575844582, now seen corresponding path program 1 times [2023-08-30 16:11:16,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:16,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559805664] [2023-08-30 16:11:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:16,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:16,944 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 16:11:16,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559805664] [2023-08-30 16:11:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559805664] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:11:16,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:11:16,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:11:16,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212221501] [2023-08-30 16:11:16,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:11:16,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:11:16,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:16,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:11:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:11:16,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 290 [2023-08-30 16:11:16,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 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 16:11:16,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:16,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 290 [2023-08-30 16:11:16,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:17,084 INFO L130 PetriNetUnfolder]: 625/1064 cut-off events. [2023-08-30 16:11:17,084 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-30 16:11:17,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2244 conditions, 1064 events. 625/1064 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4657 event pairs, 314 based on Foata normal form. 0/906 useless extension candidates. Maximal degree in co-relation 2008. Up to 926 conditions per place. [2023-08-30 16:11:17,089 INFO L137 encePairwiseOnDemand]: 287/290 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-30 16:11:17,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2023-08-30 16:11:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:11:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:11:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-30 16:11:17,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379310344827586 [2023-08-30 16:11:17,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-30 16:11:17,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-30 16:11:17,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:11:17,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-30 16:11:17,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 16:11:17,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 16:11:17,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 16:11:17,103 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 468 transitions. [2023-08-30 16:11:17,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2023-08-30 16:11:17,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:11:17,105 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2023-08-30 16:11:17,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-08-30 16:11:17,105 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-30 16:11:17,106 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2023-08-30 16:11:17,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 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 16:11:17,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:17,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:11:17,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:11:17,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:11:17,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:17,107 INFO L85 PathProgramCache]: Analyzing trace with hash -884871179, now seen corresponding path program 1 times [2023-08-30 16:11:17,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:17,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21312573] [2023-08-30 16:11:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:17,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:17,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:17,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21312573] [2023-08-30 16:11:17,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21312573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:11:17,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079653630] [2023-08-30 16:11:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:17,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:11:17,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:11:17,198 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 16:11:17,228 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 16:11:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:17,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 16:11:17,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:11:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:17,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:11:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:17,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079653630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:11:17,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:11:17,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-30 16:11:17,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601375095] [2023-08-30 16:11:17,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:11:17,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 16:11:17,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:17,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 16:11:17,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 16:11:17,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 290 [2023-08-30 16:11:17,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 136.4) internal successors, (1364), 10 states have internal predecessors, (1364), 0 states have call successors, (0), 0 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 16:11:17,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:17,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 290 [2023-08-30 16:11:17,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:17,970 INFO L130 PetriNetUnfolder]: 1530/2543 cut-off events. [2023-08-30 16:11:17,971 INFO L131 PetriNetUnfolder]: For 791/791 co-relation queries the response was YES. [2023-08-30 16:11:17,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5831 conditions, 2543 events. 1530/2543 cut-off events. For 791/791 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11709 event pairs, 226 based on Foata normal form. 78/2284 useless extension candidates. Maximal degree in co-relation 5392. Up to 737 conditions per place. [2023-08-30 16:11:17,983 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 150 selfloop transitions, 26 changer transitions 3/180 dead transitions. [2023-08-30 16:11:17,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 180 transitions, 837 flow [2023-08-30 16:11:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 16:11:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 16:11:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1778 transitions. [2023-08-30 16:11:17,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109195402298851 [2023-08-30 16:11:17,988 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1778 transitions. [2023-08-30 16:11:17,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1778 transitions. [2023-08-30 16:11:17,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:11:17,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1778 transitions. [2023-08-30 16:11:17,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 148.16666666666666) internal successors, (1778), 12 states have internal predecessors, (1778), 0 states have call successors, (0), 0 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 16:11:17,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 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 16:11:18,001 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 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 16:11:18,002 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1778 transitions. [2023-08-30 16:11:18,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 180 transitions, 837 flow [2023-08-30 16:11:18,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 180 transitions, 822 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:11:18,012 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2023-08-30 16:11:18,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-08-30 16:11:18,014 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-08-30 16:11:18,014 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2023-08-30 16:11:18,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 136.4) internal successors, (1364), 10 states have internal predecessors, (1364), 0 states have call successors, (0), 0 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 16:11:18,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:18,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:11:18,023 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 16:11:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:11:18,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:11:18,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2024911666, now seen corresponding path program 1 times [2023-08-30 16:11:18,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:18,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629190832] [2023-08-30 16:11:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:18,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:18,343 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 16:11:18,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:18,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629190832] [2023-08-30 16:11:18,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629190832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:11:18,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:11:18,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:11:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778328328] [2023-08-30 16:11:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:11:18,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:11:18,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:18,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:11:18,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:11:18,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 290 [2023-08-30 16:11:18,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 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 16:11:18,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:18,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 290 [2023-08-30 16:11:18,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:18,471 INFO L130 PetriNetUnfolder]: 509/974 cut-off events. [2023-08-30 16:11:18,471 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-08-30 16:11:18,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 974 events. 509/974 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4145 event pairs, 98 based on Foata normal form. 0/886 useless extension candidates. Maximal degree in co-relation 2336. Up to 681 conditions per place. [2023-08-30 16:11:18,475 INFO L137 encePairwiseOnDemand]: 285/290 looper letters, 45 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2023-08-30 16:11:18,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 348 flow [2023-08-30 16:11:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:11:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:11:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-08-30 16:11:18,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229885057471264 [2023-08-30 16:11:18,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-08-30 16:11:18,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-08-30 16:11:18,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:11:18,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-08-30 16:11:18,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 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 16:11:18,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 16:11:18,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 16:11:18,481 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 455 transitions. [2023-08-30 16:11:18,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 348 flow [2023-08-30 16:11:18,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 327 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-30 16:11:18,486 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2023-08-30 16:11:18,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-30 16:11:18,487 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-08-30 16:11:18,487 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2023-08-30 16:11:18,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 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 16:11:18,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:18,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:11:18,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:11:18,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:11:18,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:18,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2104323153, now seen corresponding path program 1 times [2023-08-30 16:11:18,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:18,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558268] [2023-08-30 16:11:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:18,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:18,526 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 16:11:18,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:18,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558268] [2023-08-30 16:11:18,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:11:18,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:11:18,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:11:18,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100029682] [2023-08-30 16:11:18,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:11:18,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:11:18,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:18,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:11:18,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:11:18,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-08-30 16:11:18,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 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 16:11:18,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:18,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-08-30 16:11:18,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:18,669 INFO L130 PetriNetUnfolder]: 557/1078 cut-off events. [2023-08-30 16:11:18,669 INFO L131 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2023-08-30 16:11:18,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2756 conditions, 1078 events. 557/1078 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4630 event pairs, 353 based on Foata normal form. 24/1102 useless extension candidates. Maximal degree in co-relation 2216. Up to 773 conditions per place. [2023-08-30 16:11:18,675 INFO L137 encePairwiseOnDemand]: 284/290 looper letters, 49 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-08-30 16:11:18,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 365 flow [2023-08-30 16:11:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:11:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:11:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-08-30 16:11:18,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275862068965518 [2023-08-30 16:11:18,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-08-30 16:11:18,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-08-30 16:11:18,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:11:18,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-08-30 16:11:18,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 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 16:11:18,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 16:11:18,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 16:11:18,681 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 459 transitions. [2023-08-30 16:11:18,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 365 flow [2023-08-30 16:11:18,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:11:18,685 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2023-08-30 16:11:18,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-08-30 16:11:18,686 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-08-30 16:11:18,686 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2023-08-30 16:11:18,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 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 16:11:18,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:18,687 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] [2023-08-30 16:11:18,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:11:18,687 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:11:18,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:18,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1299614568, now seen corresponding path program 1 times [2023-08-30 16:11:18,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:18,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462056306] [2023-08-30 16:11:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:18,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:19,474 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 16:11:19,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:19,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462056306] [2023-08-30 16:11:19,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462056306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:11:19,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:11:19,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 16:11:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818597231] [2023-08-30 16:11:19,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:11:19,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 16:11:19,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 16:11:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-08-30 16:11:20,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2023-08-30 16:11:20,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 15 states, 15 states have (on average 111.4) internal successors, (1671), 15 states have internal predecessors, (1671), 0 states have call successors, (0), 0 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 16:11:20,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:20,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2023-08-30 16:11:20,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:21,983 INFO L130 PetriNetUnfolder]: 930/1729 cut-off events. [2023-08-30 16:11:21,984 INFO L131 PetriNetUnfolder]: For 1197/1197 co-relation queries the response was YES. [2023-08-30 16:11:21,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4454 conditions, 1729 events. 930/1729 cut-off events. For 1197/1197 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7889 event pairs, 174 based on Foata normal form. 32/1747 useless extension candidates. Maximal degree in co-relation 2915. Up to 973 conditions per place. [2023-08-30 16:11:21,992 INFO L137 encePairwiseOnDemand]: 272/290 looper letters, 111 selfloop transitions, 38 changer transitions 30/179 dead transitions. [2023-08-30 16:11:21,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 179 transitions, 984 flow [2023-08-30 16:11:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 16:11:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 16:11:21,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2806 transitions. [2023-08-30 16:11:22,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40316091954022987 [2023-08-30 16:11:22,001 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2806 transitions. [2023-08-30 16:11:22,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2806 transitions. [2023-08-30 16:11:22,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:11:22,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2806 transitions. [2023-08-30 16:11:22,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 116.91666666666667) internal successors, (2806), 24 states have internal predecessors, (2806), 0 states have call successors, (0), 0 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 16:11:22,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 0 states have call successors, (0), 0 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 16:11:22,018 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 0 states have call successors, (0), 0 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 16:11:22,019 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 24 states and 2806 transitions. [2023-08-30 16:11:22,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 179 transitions, 984 flow [2023-08-30 16:11:22,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 179 transitions, 954 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 16:11:22,028 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 542 flow [2023-08-30 16:11:22,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=542, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-08-30 16:11:22,031 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 54 predicate places. [2023-08-30 16:11:22,032 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 542 flow [2023-08-30 16:11:22,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 111.4) internal successors, (1671), 15 states have internal predecessors, (1671), 0 states have call successors, (0), 0 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 16:11:22,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:22,034 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] [2023-08-30 16:11:22,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:11:22,035 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:11:22,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1750382990, now seen corresponding path program 2 times [2023-08-30 16:11:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137656807] [2023-08-30 16:11:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:22,892 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 16:11:22,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:22,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137656807] [2023-08-30 16:11:22,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137656807] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:11:22,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:11:22,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 16:11:22,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996233339] [2023-08-30 16:11:22,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:11:22,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 16:11:22,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:22,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 16:11:22,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-08-30 16:11:24,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 290 [2023-08-30 16:11:24,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 542 flow. Second operand has 16 states, 16 states have (on average 108.3125) internal successors, (1733), 16 states have internal predecessors, (1733), 0 states have call successors, (0), 0 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 16:11:24,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:24,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 290 [2023-08-30 16:11:24,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:25,417 INFO L130 PetriNetUnfolder]: 1208/2259 cut-off events. [2023-08-30 16:11:25,417 INFO L131 PetriNetUnfolder]: For 2489/2489 co-relation queries the response was YES. [2023-08-30 16:11:25,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6977 conditions, 2259 events. 1208/2259 cut-off events. For 2489/2489 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 10806 event pairs, 374 based on Foata normal form. 16/2261 useless extension candidates. Maximal degree in co-relation 5574. Up to 1405 conditions per place. [2023-08-30 16:11:25,433 INFO L137 encePairwiseOnDemand]: 272/290 looper letters, 117 selfloop transitions, 32 changer transitions 23/172 dead transitions. [2023-08-30 16:11:25,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 172 transitions, 1221 flow [2023-08-30 16:11:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 16:11:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 16:11:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1623 transitions. [2023-08-30 16:11:25,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997536945812808 [2023-08-30 16:11:25,439 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1623 transitions. [2023-08-30 16:11:25,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1623 transitions. [2023-08-30 16:11:25,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:11:25,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1623 transitions. [2023-08-30 16:11:25,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 115.92857142857143) internal successors, (1623), 14 states have internal predecessors, (1623), 0 states have call successors, (0), 0 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 16:11:25,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 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 16:11:25,450 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 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 16:11:25,450 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 542 flow. Second operand 14 states and 1623 transitions. [2023-08-30 16:11:25,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 172 transitions, 1221 flow [2023-08-30 16:11:25,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 172 transitions, 1209 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 16:11:25,466 INFO L231 Difference]: Finished difference. Result has 108 places, 99 transitions, 756 flow [2023-08-30 16:11:25,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=756, PETRI_PLACES=108, PETRI_TRANSITIONS=99} [2023-08-30 16:11:25,467 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 74 predicate places. [2023-08-30 16:11:25,467 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 99 transitions, 756 flow [2023-08-30 16:11:25,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.3125) internal successors, (1733), 16 states have internal predecessors, (1733), 0 states have call successors, (0), 0 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 16:11:25,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:25,468 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] [2023-08-30 16:11:25,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:11:25,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:11:25,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:25,469 INFO L85 PathProgramCache]: Analyzing trace with hash 954194670, now seen corresponding path program 3 times [2023-08-30 16:11:25,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:25,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142775625] [2023-08-30 16:11:25,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:25,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:26,231 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 16:11:26,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:26,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142775625] [2023-08-30 16:11:26,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142775625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:11:26,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:11:26,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 16:11:26,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571191741] [2023-08-30 16:11:26,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:11:26,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 16:11:26,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:26,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 16:11:26,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2023-08-30 16:11:27,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 290 [2023-08-30 16:11:27,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 99 transitions, 756 flow. Second operand has 16 states, 16 states have (on average 108.3125) internal successors, (1733), 16 states have internal predecessors, (1733), 0 states have call successors, (0), 0 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 16:11:27,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:27,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 290 [2023-08-30 16:11:27,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:28,504 INFO L130 PetriNetUnfolder]: 1356/2543 cut-off events. [2023-08-30 16:11:28,505 INFO L131 PetriNetUnfolder]: For 3554/3554 co-relation queries the response was YES. [2023-08-30 16:11:28,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8329 conditions, 2543 events. 1356/2543 cut-off events. For 3554/3554 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12525 event pairs, 371 based on Foata normal form. 16/2545 useless extension candidates. Maximal degree in co-relation 6506. Up to 1368 conditions per place. [2023-08-30 16:11:28,523 INFO L137 encePairwiseOnDemand]: 273/290 looper letters, 117 selfloop transitions, 40 changer transitions 24/181 dead transitions. [2023-08-30 16:11:28,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 181 transitions, 1431 flow [2023-08-30 16:11:28,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 16:11:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 16:11:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1623 transitions. [2023-08-30 16:11:28,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997536945812808 [2023-08-30 16:11:28,529 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1623 transitions. [2023-08-30 16:11:28,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1623 transitions. [2023-08-30 16:11:28,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:11:28,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1623 transitions. [2023-08-30 16:11:28,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 115.92857142857143) internal successors, (1623), 14 states have internal predecessors, (1623), 0 states have call successors, (0), 0 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 16:11:28,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 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 16:11:28,539 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 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 16:11:28,540 INFO L175 Difference]: Start difference. First operand has 108 places, 99 transitions, 756 flow. Second operand 14 states and 1623 transitions. [2023-08-30 16:11:28,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 181 transitions, 1431 flow [2023-08-30 16:11:28,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 181 transitions, 1403 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-30 16:11:28,557 INFO L231 Difference]: Finished difference. Result has 122 places, 108 transitions, 951 flow [2023-08-30 16:11:28,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=951, PETRI_PLACES=122, PETRI_TRANSITIONS=108} [2023-08-30 16:11:28,558 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 88 predicate places. [2023-08-30 16:11:28,558 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 108 transitions, 951 flow [2023-08-30 16:11:28,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.3125) internal successors, (1733), 16 states have internal predecessors, (1733), 0 states have call successors, (0), 0 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 16:11:28,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:28,559 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 16:11:28,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:11:28,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:11:28,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:28,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1380599275, now seen corresponding path program 2 times [2023-08-30 16:11:28,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:28,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149469739] [2023-08-30 16:11:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:28,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:28,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:28,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149469739] [2023-08-30 16:11:28,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149469739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:11:28,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709927009] [2023-08-30 16:11:28,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:11:28,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:11:28,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:11:28,749 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 16:11:28,777 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 16:11:28,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:11:28,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:11:28,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 16:11:28,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:11:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:28,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:11:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:28,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709927009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:11:28,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:11:28,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2023-08-30 16:11:28,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142013264] [2023-08-30 16:11:28,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:11:28,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 16:11:28,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:28,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 16:11:28,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-08-30 16:11:29,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 290 [2023-08-30 16:11:29,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 108 transitions, 951 flow. Second operand has 15 states, 15 states have (on average 133.4) internal successors, (2001), 15 states have internal predecessors, (2001), 0 states have call successors, (0), 0 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 16:11:29,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:29,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 290 [2023-08-30 16:11:29,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:29,572 INFO L130 PetriNetUnfolder]: 1520/2891 cut-off events. [2023-08-30 16:11:29,572 INFO L131 PetriNetUnfolder]: For 6091/6091 co-relation queries the response was YES. [2023-08-30 16:11:29,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10081 conditions, 2891 events. 1520/2891 cut-off events. For 6091/6091 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 14455 event pairs, 386 based on Foata normal form. 16/2891 useless extension candidates. Maximal degree in co-relation 7162. Up to 978 conditions per place. [2023-08-30 16:11:29,596 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 188 selfloop transitions, 48 changer transitions 6/247 dead transitions. [2023-08-30 16:11:29,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 247 transitions, 2110 flow [2023-08-30 16:11:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 16:11:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 16:11:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2391 transitions. [2023-08-30 16:11:29,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48498985801217037 [2023-08-30 16:11:29,602 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2391 transitions. [2023-08-30 16:11:29,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2391 transitions. [2023-08-30 16:11:29,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:11:29,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2391 transitions. [2023-08-30 16:11:29,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 140.64705882352942) internal successors, (2391), 17 states have internal predecessors, (2391), 0 states have call successors, (0), 0 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 16:11:29,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 16:11:29,615 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 16:11:29,616 INFO L175 Difference]: Start difference. First operand has 122 places, 108 transitions, 951 flow. Second operand 17 states and 2391 transitions. [2023-08-30 16:11:29,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 247 transitions, 2110 flow [2023-08-30 16:11:29,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 247 transitions, 2047 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-30 16:11:29,641 INFO L231 Difference]: Finished difference. Result has 141 places, 127 transitions, 1259 flow [2023-08-30 16:11:29,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1259, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2023-08-30 16:11:29,642 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 107 predicate places. [2023-08-30 16:11:29,642 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 1259 flow [2023-08-30 16:11:29,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 133.4) internal successors, (2001), 15 states have internal predecessors, (2001), 0 states have call successors, (0), 0 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 16:11:29,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:29,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:11:29,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 16:11:29,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-30 16:11:29,849 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:11:29,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash 934646639, now seen corresponding path program 4 times [2023-08-30 16:11:29,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:29,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970675190] [2023-08-30 16:11:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:29,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:30,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:30,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970675190] [2023-08-30 16:11:30,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970675190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:11:30,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990957100] [2023-08-30 16:11:30,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 16:11:30,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:11:30,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:11:30,497 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 16:11:30,500 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 16:11:30,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 16:11:30,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:11:30,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 16:11:30,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:11:30,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-08-30 16:11:31,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 45 [2023-08-30 16:11:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:34,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:11:34,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 16:11:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:11:34,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990957100] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 16:11:34,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 16:11:34,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15, 15] total 43 [2023-08-30 16:11:34,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060199826] [2023-08-30 16:11:34,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:11:34,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 16:11:34,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:34,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 16:11:34,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1750, Unknown=1, NotChecked=0, Total=1892 [2023-08-30 16:11:36,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 290 [2023-08-30 16:11:36,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 1259 flow. Second operand has 14 states, 14 states have (on average 117.0) internal successors, (1638), 14 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 16:11:36,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:36,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 290 [2023-08-30 16:11:36,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:39,300 INFO L130 PetriNetUnfolder]: 2832/5250 cut-off events. [2023-08-30 16:11:39,300 INFO L131 PetriNetUnfolder]: For 14501/14501 co-relation queries the response was YES. [2023-08-30 16:11:39,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19586 conditions, 5250 events. 2832/5250 cut-off events. For 14501/14501 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 29424 event pairs, 686 based on Foata normal form. 0/5221 useless extension candidates. Maximal degree in co-relation 14314. Up to 1634 conditions per place. [2023-08-30 16:11:39,398 INFO L137 encePairwiseOnDemand]: 274/290 looper letters, 194 selfloop transitions, 140 changer transitions 4/338 dead transitions. [2023-08-30 16:11:39,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 338 transitions, 3324 flow [2023-08-30 16:11:39,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 16:11:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 16:11:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3408 transitions. [2023-08-30 16:11:39,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41970443349753694 [2023-08-30 16:11:39,411 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3408 transitions. [2023-08-30 16:11:39,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3408 transitions. [2023-08-30 16:11:39,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:11:39,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3408 transitions. [2023-08-30 16:11:39,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 121.71428571428571) internal successors, (3408), 28 states have internal predecessors, (3408), 0 states have call successors, (0), 0 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 16:11:39,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 290.0) internal successors, (8410), 29 states have internal predecessors, (8410), 0 states have call successors, (0), 0 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 16:11:39,431 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 290.0) internal successors, (8410), 29 states have internal predecessors, (8410), 0 states have call successors, (0), 0 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 16:11:39,431 INFO L175 Difference]: Start difference. First operand has 141 places, 127 transitions, 1259 flow. Second operand 28 states and 3408 transitions. [2023-08-30 16:11:39,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 338 transitions, 3324 flow [2023-08-30 16:11:39,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 338 transitions, 3094 flow, removed 73 selfloop flow, removed 8 redundant places. [2023-08-30 16:11:39,493 INFO L231 Difference]: Finished difference. Result has 167 places, 204 transitions, 2262 flow [2023-08-30 16:11:39,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2262, PETRI_PLACES=167, PETRI_TRANSITIONS=204} [2023-08-30 16:11:39,495 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 133 predicate places. [2023-08-30 16:11:39,495 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 204 transitions, 2262 flow [2023-08-30 16:11:39,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 117.0) internal successors, (1638), 14 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 16:11:39,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:11:39,496 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:11:39,504 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 16:11:39,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:11:39,701 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:11:39,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:11:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1979329675, now seen corresponding path program 5 times [2023-08-30 16:11:39,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:11:39,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367029795] [2023-08-30 16:11:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:11:39,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:11:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:11:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:40,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:11:40,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367029795] [2023-08-30 16:11:40,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367029795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:11:40,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465410021] [2023-08-30 16:11:40,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 16:11:40,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:11:40,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:11:40,640 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 16:11:40,642 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 16:11:40,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:11:40,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:11:40,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-30 16:11:40,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:11:40,778 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-30 16:11:40,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-30 16:11:41,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-08-30 16:11:41,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2023-08-30 16:11:41,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 45 [2023-08-30 16:11:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:11:45,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:11:45,467 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_315 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_315) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2023-08-30 16:11:45,476 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_315 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_315) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset|)) 4294967296)))) is different from false [2023-08-30 16:11:45,482 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_315 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_315) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2023-08-30 16:11:45,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:11:45,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 16:11:45,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:11:45,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-30 16:11:45,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-30 16:11:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-08-30 16:11:45,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465410021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:11:45,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:11:45,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 46 [2023-08-30 16:11:45,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594130289] [2023-08-30 16:11:45,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:11:45,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-30 16:11:45,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:11:45,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-30 16:11:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1816, Unknown=4, NotChecked=264, Total=2256 [2023-08-30 16:11:45,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-08-30 16:11:45,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 204 transitions, 2262 flow. Second operand has 48 states, 48 states have (on average 87.75) internal successors, (4212), 48 states have internal predecessors, (4212), 0 states have call successors, (0), 0 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 16:11:45,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:11:45,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-08-30 16:11:45,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:11:50,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 16:11:54,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:12:04,569 INFO L130 PetriNetUnfolder]: 7689/14643 cut-off events. [2023-08-30 16:12:04,569 INFO L131 PetriNetUnfolder]: For 51593/51593 co-relation queries the response was YES. [2023-08-30 16:12:04,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57655 conditions, 14643 events. 7689/14643 cut-off events. For 51593/51593 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 104863 event pairs, 1339 based on Foata normal form. 52/14614 useless extension candidates. Maximal degree in co-relation 40517. Up to 3311 conditions per place. [2023-08-30 16:12:04,715 INFO L137 encePairwiseOnDemand]: 266/290 looper letters, 514 selfloop transitions, 586 changer transitions 20/1120 dead transitions. [2023-08-30 16:12:04,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 1120 transitions, 11789 flow [2023-08-30 16:12:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-30 16:12:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-30 16:12:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 8055 transitions. [2023-08-30 16:12:04,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3192627824019025 [2023-08-30 16:12:04,730 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 8055 transitions. [2023-08-30 16:12:04,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 8055 transitions. [2023-08-30 16:12:04,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:12:04,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 8055 transitions. [2023-08-30 16:12:04,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 92.58620689655173) internal successors, (8055), 87 states have internal predecessors, (8055), 0 states have call successors, (0), 0 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 16:12:04,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 290.0) internal successors, (25520), 88 states have internal predecessors, (25520), 0 states have call successors, (0), 0 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 16:12:04,799 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 290.0) internal successors, (25520), 88 states have internal predecessors, (25520), 0 states have call successors, (0), 0 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 16:12:04,800 INFO L175 Difference]: Start difference. First operand has 167 places, 204 transitions, 2262 flow. Second operand 87 states and 8055 transitions. [2023-08-30 16:12:04,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 1120 transitions, 11789 flow [2023-08-30 16:12:05,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 1120 transitions, 11066 flow, removed 279 selfloop flow, removed 6 redundant places. [2023-08-30 16:12:05,181 INFO L231 Difference]: Finished difference. Result has 295 places, 747 transitions, 9659 flow [2023-08-30 16:12:05,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=9659, PETRI_PLACES=295, PETRI_TRANSITIONS=747} [2023-08-30 16:12:05,182 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 261 predicate places. [2023-08-30 16:12:05,182 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 747 transitions, 9659 flow [2023-08-30 16:12:05,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 87.75) internal successors, (4212), 48 states have internal predecessors, (4212), 0 states have call successors, (0), 0 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 16:12:05,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:12:05,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:12:05,191 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 16:12:05,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:12:05,389 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:12:05,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:12:05,389 INFO L85 PathProgramCache]: Analyzing trace with hash -388940039, now seen corresponding path program 6 times [2023-08-30 16:12:05,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:12:05,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491276229] [2023-08-30 16:12:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:12:05,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:12:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:12:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:12:06,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:12:06,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491276229] [2023-08-30 16:12:06,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491276229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:12:06,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586372464] [2023-08-30 16:12:06,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 16:12:06,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:12:06,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:12:06,312 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 16:12:06,315 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 16:12:06,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-30 16:12:06,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:12:06,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 16:12:06,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:12:06,442 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-30 16:12:06,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-30 16:12:06,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 16:12:06,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2023-08-30 16:12:07,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 45 [2023-08-30 16:12:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:12:07,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:12:07,933 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_369 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_369) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2023-08-30 16:12:07,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:12:07,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 16:12:07,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:12:07,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-30 16:12:07,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-30 16:12:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:12:08,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586372464] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:12:08,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:12:08,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 44 [2023-08-30 16:12:08,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294878681] [2023-08-30 16:12:08,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:12:08,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-30 16:12:08,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:12:08,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-30 16:12:08,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1837, Unknown=1, NotChecked=86, Total=2070 [2023-08-30 16:12:08,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-08-30 16:12:08,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 747 transitions, 9659 flow. Second operand has 46 states, 46 states have (on average 87.82608695652173) internal successors, (4040), 46 states have internal predecessors, (4040), 0 states have call successors, (0), 0 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 16:12:08,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:12:08,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-08-30 16:12:08,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:12:31,240 INFO L130 PetriNetUnfolder]: 9778/18870 cut-off events. [2023-08-30 16:12:31,240 INFO L131 PetriNetUnfolder]: For 1607453/1607453 co-relation queries the response was YES. [2023-08-30 16:12:31,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231198 conditions, 18870 events. 9778/18870 cut-off events. For 1607453/1607453 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 142118 event pairs, 1445 based on Foata normal form. 85/18848 useless extension candidates. Maximal degree in co-relation 222093. Up to 8256 conditions per place. [2023-08-30 16:12:31,689 INFO L137 encePairwiseOnDemand]: 273/290 looper letters, 519 selfloop transitions, 871 changer transitions 15/1405 dead transitions. [2023-08-30 16:12:31,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1405 transitions, 24679 flow [2023-08-30 16:12:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-30 16:12:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-30 16:12:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 5544 transitions. [2023-08-30 16:12:31,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31862068965517243 [2023-08-30 16:12:31,706 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 5544 transitions. [2023-08-30 16:12:31,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 5544 transitions. [2023-08-30 16:12:31,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:12:31,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 5544 transitions. [2023-08-30 16:12:31,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 92.4) internal successors, (5544), 60 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 16:12:31,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 290.0) internal successors, (17690), 61 states have internal predecessors, (17690), 0 states have call successors, (0), 0 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 16:12:31,742 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 290.0) internal successors, (17690), 61 states have internal predecessors, (17690), 0 states have call successors, (0), 0 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 16:12:31,742 INFO L175 Difference]: Start difference. First operand has 295 places, 747 transitions, 9659 flow. Second operand 60 states and 5544 transitions. [2023-08-30 16:12:31,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1405 transitions, 24679 flow [2023-08-30 16:12:33,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1405 transitions, 24023 flow, removed 290 selfloop flow, removed 12 redundant places. [2023-08-30 16:12:33,105 INFO L231 Difference]: Finished difference. Result has 351 places, 1039 transitions, 15128 flow [2023-08-30 16:12:33,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=9087, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=15128, PETRI_PLACES=351, PETRI_TRANSITIONS=1039} [2023-08-30 16:12:33,106 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 317 predicate places. [2023-08-30 16:12:33,106 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1039 transitions, 15128 flow [2023-08-30 16:12:33,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 87.82608695652173) internal successors, (4040), 46 states have internal predecessors, (4040), 0 states have call successors, (0), 0 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 16:12:33,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:12:33,108 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:12:33,117 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 16:12:33,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 16:12:33,314 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:12:33,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:12:33,314 INFO L85 PathProgramCache]: Analyzing trace with hash -277182823, now seen corresponding path program 1 times [2023-08-30 16:12:33,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:12:33,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752277768] [2023-08-30 16:12:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:12:33,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:12:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:12:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:12:33,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:12:33,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752277768] [2023-08-30 16:12:33,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752277768] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:12:33,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196581794] [2023-08-30 16:12:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:12:33,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:12:33,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:12:33,474 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 16:12:33,477 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 16:12:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:12:33,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 16:12:33,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:12:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 16:12:33,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:12:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 16:12:33,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196581794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:12:33,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:12:33,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-08-30 16:12:33,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208122905] [2023-08-30 16:12:33,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:12:33,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 16:12:33,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:12:33,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 16:12:33,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-30 16:12:33,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 290 [2023-08-30 16:12:33,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1039 transitions, 15128 flow. Second operand has 13 states, 13 states have (on average 131.69230769230768) internal successors, (1712), 13 states have internal predecessors, (1712), 0 states have call successors, (0), 0 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 16:12:33,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:12:33,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 290 [2023-08-30 16:12:33,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:12:41,219 INFO L130 PetriNetUnfolder]: 10984/21276 cut-off events. [2023-08-30 16:12:41,219 INFO L131 PetriNetUnfolder]: For 1814974/1814974 co-relation queries the response was YES. [2023-08-30 16:12:41,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263272 conditions, 21276 events. 10984/21276 cut-off events. For 1814974/1814974 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 165783 event pairs, 2502 based on Foata normal form. 85/21254 useless extension candidates. Maximal degree in co-relation 254074. Up to 9586 conditions per place. [2023-08-30 16:12:41,673 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 984 selfloop transitions, 425 changer transitions 14/1423 dead transitions. [2023-08-30 16:12:41,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1423 transitions, 24256 flow [2023-08-30 16:12:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 16:12:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 16:12:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2197 transitions. [2023-08-30 16:12:41,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47349137931034485 [2023-08-30 16:12:41,676 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2197 transitions. [2023-08-30 16:12:41,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2197 transitions. [2023-08-30 16:12:41,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:12:41,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2197 transitions. [2023-08-30 16:12:41,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 137.3125) internal successors, (2197), 16 states have internal predecessors, (2197), 0 states have call successors, (0), 0 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 16:12:41,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 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 16:12:41,684 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 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 16:12:41,684 INFO L175 Difference]: Start difference. First operand has 351 places, 1039 transitions, 15128 flow. Second operand 16 states and 2197 transitions. [2023-08-30 16:12:41,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1423 transitions, 24256 flow [2023-08-30 16:12:43,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1423 transitions, 22789 flow, removed 410 selfloop flow, removed 14 redundant places. [2023-08-30 16:12:43,669 INFO L231 Difference]: Finished difference. Result has 360 places, 1139 transitions, 17034 flow [2023-08-30 16:12:43,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=13855, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=17034, PETRI_PLACES=360, PETRI_TRANSITIONS=1139} [2023-08-30 16:12:43,670 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 326 predicate places. [2023-08-30 16:12:43,670 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1139 transitions, 17034 flow [2023-08-30 16:12:43,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.69230769230768) internal successors, (1712), 13 states have internal predecessors, (1712), 0 states have call successors, (0), 0 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 16:12:43,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:12:43,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:12:43,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 16:12:43,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:12:43,875 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:12:43,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:12:43,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2131210369, now seen corresponding path program 1 times [2023-08-30 16:12:43,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:12:43,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096579391] [2023-08-30 16:12:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:12:43,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:12:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:12:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:12:44,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:12:44,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096579391] [2023-08-30 16:12:44,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096579391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:12:44,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795935806] [2023-08-30 16:12:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:12:44,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:12:44,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:12:44,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:12:44,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 16:12:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:12:44,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-30 16:12:45,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:12:45,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-08-30 16:12:45,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2023-08-30 16:12:46,495 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 16:12:46,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 45 [2023-08-30 16:12:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:12:49,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:12:50,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-08-30 16:12:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:12:51,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795935806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:12:51,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:12:51,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 60 [2023-08-30 16:12:51,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736190632] [2023-08-30 16:12:51,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:12:51,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-08-30 16:12:51,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:12:51,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-08-30 16:12:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=3405, Unknown=1, NotChecked=0, Total=3782 [2023-08-30 16:12:54,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:12:56,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:12:58,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:03,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:07,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:11,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:14,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:16,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:18,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:23,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:26,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:30,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:32,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:34,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:37,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:39,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 290 [2023-08-30 16:13:39,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1139 transitions, 17034 flow. Second operand has 62 states, 62 states have (on average 98.74193548387096) internal successors, (6122), 62 states have internal predecessors, (6122), 0 states have call successors, (0), 0 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 16:13:39,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:13:39,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 290 [2023-08-30 16:13:39,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:13:42,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:45,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:47,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:50,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:52,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:54,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:57,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:13:59,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:03,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:06,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:08,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:11,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:13,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:14,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:17,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:19,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:23,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:28,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:30,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:34,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:36,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:39,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:42,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:46,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:49,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:51,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:54,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:57,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:14:59,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:15:02,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:15:08,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:15:10,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:15:12,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:15:14,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:15:17,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:15:21,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:15:23,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:15:28,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 16:15:36,836 INFO L130 PetriNetUnfolder]: 14103/27724 cut-off events. [2023-08-30 16:15:36,836 INFO L131 PetriNetUnfolder]: For 2367699/2367699 co-relation queries the response was YES. [2023-08-30 16:15:37,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341047 conditions, 27724 events. 14103/27724 cut-off events. For 2367699/2367699 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 220651 event pairs, 3052 based on Foata normal form. 318/27935 useless extension candidates. Maximal degree in co-relation 332006. Up to 13382 conditions per place. [2023-08-30 16:15:37,505 INFO L137 encePairwiseOnDemand]: 272/290 looper letters, 1178 selfloop transitions, 706 changer transitions 105/1989 dead transitions. [2023-08-30 16:15:37,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1989 transitions, 37121 flow [2023-08-30 16:15:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-30 16:15:37,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-30 16:15:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 7120 transitions. [2023-08-30 16:15:37,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35582208895552225 [2023-08-30 16:15:37,513 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 7120 transitions. [2023-08-30 16:15:37,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 7120 transitions. [2023-08-30 16:15:37,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:15:37,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 7120 transitions. [2023-08-30 16:15:37,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 103.18840579710145) internal successors, (7120), 69 states have internal predecessors, (7120), 0 states have call successors, (0), 0 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 16:15:37,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 290.0) internal successors, (20300), 70 states have internal predecessors, (20300), 0 states have call successors, (0), 0 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 16:15:37,537 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 290.0) internal successors, (20300), 70 states have internal predecessors, (20300), 0 states have call successors, (0), 0 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 16:15:37,537 INFO L175 Difference]: Start difference. First operand has 360 places, 1139 transitions, 17034 flow. Second operand 69 states and 7120 transitions. [2023-08-30 16:15:37,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1989 transitions, 37121 flow [2023-08-30 16:15:40,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1989 transitions, 36585 flow, removed 259 selfloop flow, removed 3 redundant places. [2023-08-30 16:15:40,164 INFO L231 Difference]: Finished difference. Result has 458 places, 1494 transitions, 25231 flow [2023-08-30 16:15:40,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=16808, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=25231, PETRI_PLACES=458, PETRI_TRANSITIONS=1494} [2023-08-30 16:15:40,165 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 424 predicate places. [2023-08-30 16:15:40,165 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1494 transitions, 25231 flow [2023-08-30 16:15:40,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 98.74193548387096) internal successors, (6122), 62 states have internal predecessors, (6122), 0 states have call successors, (0), 0 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 16:15:40,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:15:40,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:15:40,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 16:15:40,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:15:40,367 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:15:40,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:15:40,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1071599769, now seen corresponding path program 2 times [2023-08-30 16:15:40,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:15:40,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100342656] [2023-08-30 16:15:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:15:40,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:15:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:15:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:15:41,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:15:41,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100342656] [2023-08-30 16:15:41,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100342656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:15:41,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260161747] [2023-08-30 16:15:41,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:15:41,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:15:41,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:15:41,595 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:15:41,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 16:15:41,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:15:41,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:15:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-30 16:15:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:15:41,741 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:15:41,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-30 16:15:41,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 16:15:41,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-30 16:15:42,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:15:42,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-30 16:15:42,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-30 16:15:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:15:42,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:15:45,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:15:45,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 16:15:45,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:15:45,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-30 16:15:45,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-30 16:15:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:15:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260161747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:15:46,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:15:46,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 59 [2023-08-30 16:15:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543045260] [2023-08-30 16:15:46,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:15:46,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-08-30 16:15:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:15:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-08-30 16:15:46,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3433, Unknown=6, NotChecked=0, Total=3660 [2023-08-30 16:15:48,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:15:53,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:15:56,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:15:58,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:16:05,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:16:06,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 290 [2023-08-30 16:16:06,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1494 transitions, 25231 flow. Second operand has 61 states, 61 states have (on average 94.70491803278688) internal successors, (5777), 61 states have internal predecessors, (5777), 0 states have call successors, (0), 0 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 16:16:06,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:16:06,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 290 [2023-08-30 16:16:06,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:16:51,195 INFO L130 PetriNetUnfolder]: 24157/48145 cut-off events. [2023-08-30 16:16:51,195 INFO L131 PetriNetUnfolder]: For 4323766/4323766 co-relation queries the response was YES. [2023-08-30 16:16:52,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617389 conditions, 48145 events. 24157/48145 cut-off events. For 4323766/4323766 co-relation queries the response was YES. Maximal size of possible extension queue 1055. Compared 416168 event pairs, 3051 based on Foata normal form. 456/48400 useless extension candidates. Maximal degree in co-relation 607995. Up to 20434 conditions per place. [2023-08-30 16:16:52,578 INFO L137 encePairwiseOnDemand]: 271/290 looper letters, 848 selfloop transitions, 2537 changer transitions 83/3468 dead transitions. [2023-08-30 16:16:52,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 3468 transitions, 71020 flow [2023-08-30 16:16:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-08-30 16:16:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2023-08-30 16:16:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 10096 transitions. [2023-08-30 16:16:52,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34131169709263015 [2023-08-30 16:16:52,592 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 10096 transitions. [2023-08-30 16:16:52,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 10096 transitions. [2023-08-30 16:16:52,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:16:52,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 10096 transitions. [2023-08-30 16:16:52,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 98.98039215686275) internal successors, (10096), 102 states have internal predecessors, (10096), 0 states have call successors, (0), 0 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 16:16:52,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 290.0) internal successors, (29870), 103 states have internal predecessors, (29870), 0 states have call successors, (0), 0 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 16:16:52,631 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 290.0) internal successors, (29870), 103 states have internal predecessors, (29870), 0 states have call successors, (0), 0 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 16:16:52,632 INFO L175 Difference]: Start difference. First operand has 458 places, 1494 transitions, 25231 flow. Second operand 102 states and 10096 transitions. [2023-08-30 16:16:52,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 3468 transitions, 71020 flow [2023-08-30 16:17:02,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 3468 transitions, 68634 flow, removed 1169 selfloop flow, removed 11 redundant places. [2023-08-30 16:17:02,731 INFO L231 Difference]: Finished difference. Result has 561 places, 2753 transitions, 52598 flow [2023-08-30 16:17:02,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=24229, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=52598, PETRI_PLACES=561, PETRI_TRANSITIONS=2753} [2023-08-30 16:17:02,732 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 527 predicate places. [2023-08-30 16:17:02,732 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 2753 transitions, 52598 flow [2023-08-30 16:17:02,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 94.70491803278688) internal successors, (5777), 61 states have internal predecessors, (5777), 0 states have call successors, (0), 0 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 16:17:02,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:17:02,733 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:17:02,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 16:17:02,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 16:17:02,934 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:17:02,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:17:02,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2086904968, now seen corresponding path program 2 times [2023-08-30 16:17:02,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:17:02,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346706994] [2023-08-30 16:17:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:17:02,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:17:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:17:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:17:03,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:17:03,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346706994] [2023-08-30 16:17:03,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346706994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:17:03,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886086890] [2023-08-30 16:17:03,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:17:03,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:17:03,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:17:03,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:17:03,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 16:17:03,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:17:03,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:17:03,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 16:17:03,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:17:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:17:03,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:17:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 16:17:03,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886086890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:17:03,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:17:03,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2023-08-30 16:17:03,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546182645] [2023-08-30 16:17:03,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:17:03,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 16:17:03,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:17:03,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 16:17:03,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-08-30 16:17:03,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 290 [2023-08-30 16:17:03,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 2753 transitions, 52598 flow. Second operand has 19 states, 19 states have (on average 130.31578947368422) internal successors, (2476), 19 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:17:03,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:17:03,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 290 [2023-08-30 16:17:03,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:17:40,512 INFO L130 PetriNetUnfolder]: 26763/53514 cut-off events. [2023-08-30 16:17:40,512 INFO L131 PetriNetUnfolder]: For 4833702/4833702 co-relation queries the response was YES. [2023-08-30 16:17:41,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696454 conditions, 53514 events. 26763/53514 cut-off events. For 4833702/4833702 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 470685 event pairs, 6181 based on Foata normal form. 200/53578 useless extension candidates. Maximal degree in co-relation 690045. Up to 22562 conditions per place. [2023-08-30 16:17:41,986 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 1440 selfloop transitions, 2208 changer transitions 16/3664 dead transitions. [2023-08-30 16:17:41,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 3664 transitions, 78222 flow [2023-08-30 16:17:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 16:17:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 16:17:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3236 transitions. [2023-08-30 16:17:41,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649425287356322 [2023-08-30 16:17:41,989 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3236 transitions. [2023-08-30 16:17:41,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3236 transitions. [2023-08-30 16:17:41,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:17:41,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3236 transitions. [2023-08-30 16:17:41,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 134.83333333333334) internal successors, (3236), 24 states have internal predecessors, (3236), 0 states have call successors, (0), 0 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 16:17:41,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 0 states have call successors, (0), 0 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 16:17:41,998 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 0 states have call successors, (0), 0 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 16:17:41,998 INFO L175 Difference]: Start difference. First operand has 561 places, 2753 transitions, 52598 flow. Second operand 24 states and 3236 transitions. [2023-08-30 16:17:41,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 3664 transitions, 78222 flow [2023-08-30 16:17:56,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 3664 transitions, 73527 flow, removed 2251 selfloop flow, removed 22 redundant places. [2023-08-30 16:17:56,509 INFO L231 Difference]: Finished difference. Result has 567 places, 3037 transitions, 61506 flow [2023-08-30 16:17:56,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=48992, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1882, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=61506, PETRI_PLACES=567, PETRI_TRANSITIONS=3037} [2023-08-30 16:17:56,512 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 533 predicate places. [2023-08-30 16:17:56,512 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 3037 transitions, 61506 flow [2023-08-30 16:17:56,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 130.31578947368422) internal successors, (2476), 19 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:17:56,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:17:56,513 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-08-30 16:17:56,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 16:17:56,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 16:17:56,718 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:17:56,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:17:56,718 INFO L85 PathProgramCache]: Analyzing trace with hash 674057269, now seen corresponding path program 3 times [2023-08-30 16:17:56,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:17:56,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790451773] [2023-08-30 16:17:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:17:56,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:17:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:17:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:17:56,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:17:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790451773] [2023-08-30 16:17:56,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790451773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:17:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104505531] [2023-08-30 16:17:56,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:17:56,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:17:56,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:17:56,825 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:17:56,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 16:17:56,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 16:17:56,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:17:56,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 16:17:56,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:17:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:17:57,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 16:17:57,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104505531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:17:57,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 16:17:57,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-30 16:17:57,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324156597] [2023-08-30 16:17:57,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:17:57,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 16:17:57,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:17:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 16:17:57,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-30 16:17:57,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 290 [2023-08-30 16:17:57,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 3037 transitions, 61506 flow. Second operand has 8 states, 8 states have (on average 143.5) internal successors, (1148), 8 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 16:17:57,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:17:57,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 290 [2023-08-30 16:17:57,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:18:34,340 INFO L130 PetriNetUnfolder]: 25508/51473 cut-off events. [2023-08-30 16:18:34,340 INFO L131 PetriNetUnfolder]: For 4342979/4343016 co-relation queries the response was YES. [2023-08-30 16:18:35,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647691 conditions, 51473 events. 25508/51473 cut-off events. For 4342979/4343016 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 462756 event pairs, 5054 based on Foata normal form. 1495/52931 useless extension candidates. Maximal degree in co-relation 645397. Up to 25184 conditions per place. [2023-08-30 16:18:35,615 INFO L137 encePairwiseOnDemand]: 286/290 looper letters, 1498 selfloop transitions, 13 changer transitions 1871/3701 dead transitions. [2023-08-30 16:18:35,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 3701 transitions, 79607 flow [2023-08-30 16:18:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:18:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:18:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1245 transitions. [2023-08-30 16:18:35,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366379310344828 [2023-08-30 16:18:35,616 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1245 transitions. [2023-08-30 16:18:35,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1245 transitions. [2023-08-30 16:18:35,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:18:35,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1245 transitions. [2023-08-30 16:18:35,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 155.625) internal successors, (1245), 8 states have internal predecessors, (1245), 0 states have call successors, (0), 0 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 16:18:35,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 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 16:18:35,619 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 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 16:18:35,619 INFO L175 Difference]: Start difference. First operand has 567 places, 3037 transitions, 61506 flow. Second operand 8 states and 1245 transitions. [2023-08-30 16:18:35,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 3701 transitions, 79607 flow [2023-08-30 16:18:47,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 3701 transitions, 75699 flow, removed 1070 selfloop flow, removed 12 redundant places. [2023-08-30 16:18:47,103 INFO L231 Difference]: Finished difference. Result has 566 places, 1415 transitions, 24850 flow [2023-08-30 16:18:47,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=43317, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=24850, PETRI_PLACES=566, PETRI_TRANSITIONS=1415} [2023-08-30 16:18:47,105 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 532 predicate places. [2023-08-30 16:18:47,105 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1415 transitions, 24850 flow [2023-08-30 16:18:47,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 143.5) internal successors, (1148), 8 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 16:18:47,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:18:47,106 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:18:47,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 16:18:47,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 16:18:47,367 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:18:47,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:18:47,367 INFO L85 PathProgramCache]: Analyzing trace with hash -171052028, now seen corresponding path program 3 times [2023-08-30 16:18:47,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:18:47,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553671182] [2023-08-30 16:18:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:18:47,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:18:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:18:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:18:48,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:18:48,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553671182] [2023-08-30 16:18:48,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553671182] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:18:48,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717232359] [2023-08-30 16:18:48,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:18:48,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:18:48,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:18:48,730 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:18:48,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 16:18:48,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 16:18:48,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:18:48,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-30 16:18:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:18:48,894 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 16:18:48,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-30 16:18:49,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-08-30 16:18:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:18:49,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-08-30 16:18:49,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2023-08-30 16:18:50,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 45 [2023-08-30 16:18:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:18:54,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:19:00,169 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-30 16:19:00,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2023-08-30 16:19:00,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 16:19:00,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2023-08-30 16:19:00,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-30 16:19:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 16 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:19:04,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717232359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:19:04,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:19:04,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 22] total 71 [2023-08-30 16:19:04,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086056128] [2023-08-30 16:19:04,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:19:04,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-08-30 16:19:04,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:19:04,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-08-30 16:19:04,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=4905, Unknown=34, NotChecked=0, Total=5256 [2023-08-30 16:19:06,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:08,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:11,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:13,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:15,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:17,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:19,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:22,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:24,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:26,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:28,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:30,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:33,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:35,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:37,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 16:19:37,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 290 [2023-08-30 16:19:37,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1415 transitions, 24850 flow. Second operand has 73 states, 73 states have (on average 87.76712328767124) internal successors, (6407), 73 states have internal predecessors, (6407), 0 states have call successors, (0), 0 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 16:19:37,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:19:37,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 290 [2023-08-30 16:19:37,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:20:14,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-30 16:21:17,701 INFO L130 PetriNetUnfolder]: 15557/32100 cut-off events. [2023-08-30 16:21:17,701 INFO L131 PetriNetUnfolder]: For 2864587/2864587 co-relation queries the response was YES. [2023-08-30 16:21:18,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420199 conditions, 32100 events. 15557/32100 cut-off events. For 2864587/2864587 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 275180 event pairs, 1265 based on Foata normal form. 18/32118 useless extension candidates. Maximal degree in co-relation 401549. Up to 14753 conditions per place. [2023-08-30 16:21:18,252 INFO L137 encePairwiseOnDemand]: 274/290 looper letters, 751 selfloop transitions, 1492 changer transitions 239/2482 dead transitions. [2023-08-30 16:21:18,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 2482 transitions, 52679 flow [2023-08-30 16:21:18,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-08-30 16:21:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-08-30 16:21:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 11338 transitions. [2023-08-30 16:21:18,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3152947719688543 [2023-08-30 16:21:18,263 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 11338 transitions. [2023-08-30 16:21:18,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 11338 transitions. [2023-08-30 16:21:18,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:18,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 11338 transitions. [2023-08-30 16:21:18,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 91.43548387096774) internal successors, (11338), 124 states have internal predecessors, (11338), 0 states have call successors, (0), 0 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 16:21:18,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 290.0) internal successors, (36250), 125 states have internal predecessors, (36250), 0 states have call successors, (0), 0 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 16:21:18,301 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 290.0) internal successors, (36250), 125 states have internal predecessors, (36250), 0 states have call successors, (0), 0 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 16:21:18,301 INFO L175 Difference]: Start difference. First operand has 566 places, 1415 transitions, 24850 flow. Second operand 124 states and 11338 transitions. [2023-08-30 16:21:18,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 2482 transitions, 52679 flow [2023-08-30 16:21:23,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 2482 transitions, 50163 flow, removed 933 selfloop flow, removed 26 redundant places. [2023-08-30 16:21:23,454 INFO L231 Difference]: Finished difference. Result has 676 places, 1688 transitions, 30726 flow [2023-08-30 16:21:23,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=23198, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=30726, PETRI_PLACES=676, PETRI_TRANSITIONS=1688} [2023-08-30 16:21:23,456 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 642 predicate places. [2023-08-30 16:21:23,456 INFO L495 AbstractCegarLoop]: Abstraction has has 676 places, 1688 transitions, 30726 flow [2023-08-30 16:21:23,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 87.76712328767124) internal successors, (6407), 73 states have internal predecessors, (6407), 0 states have call successors, (0), 0 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 16:21:23,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:23,457 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:23,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 16:21:23,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 16:21:23,657 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:23,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:23,658 INFO L85 PathProgramCache]: Analyzing trace with hash -224407511, now seen corresponding path program 3 times [2023-08-30 16:21:23,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:23,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182177375] [2023-08-30 16:21:23,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:23,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 16:21:23,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182177375] [2023-08-30 16:21:23,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182177375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:21:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507789245] [2023-08-30 16:21:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:21:23,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:21:23,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:21:23,938 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:21:23,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 16:21:24,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 16:21:24,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:21:24,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 16:21:24,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:21:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 16:21:24,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:21:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 16:21:24,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507789245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:21:24,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:21:24,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 17 [2023-08-30 16:21:24,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175210522] [2023-08-30 16:21:24,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:21:24,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 16:21:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 16:21:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-08-30 16:21:24,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 290 [2023-08-30 16:21:24,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 1688 transitions, 30726 flow. Second operand has 18 states, 18 states have (on average 131.33333333333334) internal successors, (2364), 18 states have internal predecessors, (2364), 0 states have call successors, (0), 0 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 16:21:24,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:21:24,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 290 [2023-08-30 16:21:24,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:21:39,619 INFO L130 PetriNetUnfolder]: 15699/32448 cut-off events. [2023-08-30 16:21:39,619 INFO L131 PetriNetUnfolder]: For 2861279/2861279 co-relation queries the response was YES. [2023-08-30 16:21:40,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425158 conditions, 32448 events. 15699/32448 cut-off events. For 2861279/2861279 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 279045 event pairs, 3199 based on Foata normal form. 28/32476 useless extension candidates. Maximal degree in co-relation 415784. Up to 14863 conditions per place. [2023-08-30 16:21:40,205 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 1123 selfloop transitions, 728 changer transitions 133/1984 dead transitions. [2023-08-30 16:21:40,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 693 places, 1984 transitions, 39771 flow [2023-08-30 16:21:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 16:21:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 16:21:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2602 transitions. [2023-08-30 16:21:40,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722323049001815 [2023-08-30 16:21:40,207 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2602 transitions. [2023-08-30 16:21:40,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2602 transitions. [2023-08-30 16:21:40,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:21:40,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2602 transitions. [2023-08-30 16:21:40,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 136.94736842105263) internal successors, (2602), 19 states have internal predecessors, (2602), 0 states have call successors, (0), 0 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 16:21:40,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 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 16:21:40,214 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 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 16:21:40,214 INFO L175 Difference]: Start difference. First operand has 676 places, 1688 transitions, 30726 flow. Second operand 19 states and 2602 transitions. [2023-08-30 16:21:40,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 693 places, 1984 transitions, 39771 flow [2023-08-30 16:21:44,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 1984 transitions, 36686 flow, removed 245 selfloop flow, removed 54 redundant places. [2023-08-30 16:21:44,769 INFO L231 Difference]: Finished difference. Result has 640 places, 1656 transitions, 28895 flow [2023-08-30 16:21:44,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=27571, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=722, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=953, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=28895, PETRI_PLACES=640, PETRI_TRANSITIONS=1656} [2023-08-30 16:21:44,770 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 606 predicate places. [2023-08-30 16:21:44,771 INFO L495 AbstractCegarLoop]: Abstraction has has 640 places, 1656 transitions, 28895 flow [2023-08-30 16:21:44,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 131.33333333333334) internal successors, (2364), 18 states have internal predecessors, (2364), 0 states have call successors, (0), 0 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 16:21:44,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:21:44,771 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:21:44,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 16:21:44,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:21:44,977 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-30 16:21:44,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:21:44,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1088570660, now seen corresponding path program 4 times [2023-08-30 16:21:44,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:21:44,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538145979] [2023-08-30 16:21:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:21:44,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:21:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:21:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:46,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:21:46,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538145979] [2023-08-30 16:21:46,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538145979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:21:46,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451857366] [2023-08-30 16:21:46,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 16:21:46,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:21:46,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:21:46,311 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:21:46,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 16:21:46,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 16:21:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:21:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-30 16:21:46,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:21:46,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-08-30 16:21:47,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:21:47,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2023-08-30 16:21:47,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 16:21:47,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2023-08-30 16:21:48,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 45 [2023-08-30 16:21:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:50,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:21:54,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-30 16:21:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:21:54,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451857366] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:21:54,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:21:54,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 25] total 76 [2023-08-30 16:21:54,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081247868] [2023-08-30 16:21:54,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:21:54,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-08-30 16:21:54,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:21:54,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-08-30 16:21:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=5589, Unknown=0, NotChecked=0, Total=5852 [2023-08-30 16:21:56,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:21:58,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:00,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:03,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:06,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:08,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:10,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:12,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:14,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:16,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:20,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:23,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:25,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:28,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:30,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:32,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:34,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:36,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:41,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:45,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:48,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:51,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:53,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:55,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:22:59,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:03,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:03,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 290 [2023-08-30 16:23:03,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 1656 transitions, 28895 flow. Second operand has 77 states, 77 states have (on average 95.98701298701299) internal successors, (7391), 77 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:23:03,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:23:03,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 290 [2023-08-30 16:23:03,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:23:06,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:08,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:11,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:13,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:15,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:18,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:20,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:22,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:24,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:26,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:28,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:32,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:34,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:36,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:38,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:40,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:42,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:44,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:46,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:49,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:52,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:54,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:57,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:23:59,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:01,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:03,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:05,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:07,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:10,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:13,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:15,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:17,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:19,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:21,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:23,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:25,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:28,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 16:24:30,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] Killed by 15