./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/weaver/chl-array-int-symm.wvr.c -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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:46:33,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:46:33,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:46:33,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:46:33,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:46:33,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:46:33,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:46:33,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:46:33,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:46:33,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:46:33,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:46:33,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:46:33,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:46:33,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:46:33,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:46:33,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:46:33,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:46:33,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:46:33,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:46:33,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:46:33,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:46:33,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:46:33,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:46:33,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:46:33,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:46:33,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:46:33,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:46:33,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:46:33,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:46:33,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:46:33,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:46:33,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:46:33,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:46:33,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:46:33,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:46:33,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:46:33,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:46:33,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:46:33,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:46:33,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:46:33,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:46:33,479 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:46:33,510 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:46:33,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:46:33,512 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:46:33,512 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:46:33,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:46:33,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:46:33,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:46:33,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:46:33,514 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:46:33,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:46:33,514 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:46:33,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:46:33,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:46:33,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:46:33,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:46:33,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:46:33,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:46:33,516 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:46:33,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:46:33,516 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:46:33,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:46:33,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:46:33,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:46:33,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:46:33,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:46:33,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:46:33,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:46:33,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:46:33,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:46:33,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:46:33,518 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:46:33,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:46:33,519 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:46:33,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:46:33,519 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:46:33,519 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:46:33,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:46:33,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:46:33,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:46:33,869 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:46:33,869 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:46:33,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-09-01 11:46:34,967 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:46:35,232 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:46:35,233 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-09-01 11:46:35,238 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f4dcbf40/b0d53282152e403e8de44cf3493ddb91/FLAG4f3ee9020 [2023-09-01 11:46:35,250 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f4dcbf40/b0d53282152e403e8de44cf3493ddb91 [2023-09-01 11:46:35,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:46:35,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:46:35,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:46:35,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:46:35,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:46:35,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43cedba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35, skipping insertion in model container [2023-09-01 11:46:35,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:46:35,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:46:35,425 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c[2482,2495] [2023-09-01 11:46:35,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:46:35,458 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:46:35,498 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c[2482,2495] [2023-09-01 11:46:35,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:46:35,526 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:46:35,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35 WrapperNode [2023-09-01 11:46:35,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:46:35,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:46:35,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:46:35,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:46:35,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,594 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 202 [2023-09-01 11:46:35,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:46:35,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:46:35,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:46:35,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:46:35,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,646 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:46:35,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:46:35,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:46:35,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:46:35,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (1/1) ... [2023-09-01 11:46:35,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:46:35,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:46:35,690 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) [2023-09-01 11:46:35,717 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 [2023-09-01 11:46:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:46:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:46:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:46:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:46:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 11:46:35,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 11:46:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 11:46:35,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 11:46:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:46:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 11:46:35,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:46:35,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:46:35,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:46:35,748 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 11:46:35,937 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:46:35,939 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:46:36,324 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:46:36,336 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:46:36,339 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 11:46:36,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:46:36 BoogieIcfgContainer [2023-09-01 11:46:36,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:46:36,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:46:36,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:46:36,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:46:36,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:46:35" (1/3) ... [2023-09-01 11:46:36,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7843acd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:46:36, skipping insertion in model container [2023-09-01 11:46:36,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:46:35" (2/3) ... [2023-09-01 11:46:36,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7843acd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:46:36, skipping insertion in model container [2023-09-01 11:46:36,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:46:36" (3/3) ... [2023-09-01 11:46:36,351 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2023-09-01 11:46:36,359 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:46:36,368 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:46:36,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:46:36,368 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:46:36,469 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:46:36,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 478 flow [2023-09-01 11:46:36,588 INFO L130 PetriNetUnfolder]: 21/229 cut-off events. [2023-09-01 11:46:36,589 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:46:36,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 229 events. 21/229 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 150. Up to 3 conditions per place. [2023-09-01 11:46:36,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 478 flow [2023-09-01 11:46:36,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 221 transitions, 454 flow [2023-09-01 11:46:36,604 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:46:36,612 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 221 transitions, 454 flow [2023-09-01 11:46:36,614 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 221 transitions, 454 flow [2023-09-01 11:46:36,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 221 transitions, 454 flow [2023-09-01 11:46:36,672 INFO L130 PetriNetUnfolder]: 21/221 cut-off events. [2023-09-01 11:46:36,672 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:46:36,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 221 events. 21/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 150. Up to 3 conditions per place. [2023-09-01 11:46:36,677 INFO L119 LiptonReduction]: Number of co-enabled transitions 5192 [2023-09-01 11:46:42,854 INFO L134 LiptonReduction]: Checked pairs total: 5413 [2023-09-01 11:46:42,854 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-09-01 11:46:42,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 11:46:42,871 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;@1441cc76, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:46:42,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 11:46:42,879 INFO L130 PetriNetUnfolder]: 5/22 cut-off events. [2023-09-01 11:46:42,879 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:46:42,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:46:42,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:46:42,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:46:42,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:46:42,884 INFO L85 PathProgramCache]: Analyzing trace with hash 40498280, now seen corresponding path program 1 times [2023-09-01 11:46:42,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:46:42,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199657612] [2023-09-01 11:46:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:42,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:46:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:43,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:46:43,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199657612] [2023-09-01 11:46:43,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199657612] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:46:43,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:46:43,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 11:46:43,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169498374] [2023-09-01 11:46:43,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:46:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:46:43,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:46:43,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:46:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:46:43,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 483 [2023-09-01 11:46:43,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:43,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:46:43,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 483 [2023-09-01 11:46:43,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:46:44,214 INFO L130 PetriNetUnfolder]: 177/320 cut-off events. [2023-09-01 11:46:44,215 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-09-01 11:46:44,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 320 events. 177/320 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1171 event pairs, 20 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 320. Up to 134 conditions per place. [2023-09-01 11:46:44,222 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 60 selfloop transitions, 10 changer transitions 4/74 dead transitions. [2023-09-01 11:46:44,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 74 transitions, 335 flow [2023-09-01 11:46:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:46:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:46:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1621 transitions. [2023-09-01 11:46:44,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195134575569358 [2023-09-01 11:46:44,241 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1621 transitions. [2023-09-01 11:46:44,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1621 transitions. [2023-09-01 11:46:44,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:46:44,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1621 transitions. [2023-09-01 11:46:44,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.625) internal successors, (1621), 8 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:44,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:44,263 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:44,265 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 8 states and 1621 transitions. [2023-09-01 11:46:44,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 74 transitions, 335 flow [2023-09-01 11:46:44,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 74 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 11:46:44,270 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 113 flow [2023-09-01 11:46:44,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=113, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2023-09-01 11:46:44,274 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2023-09-01 11:46:44,275 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 113 flow [2023-09-01 11:46:44,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:44,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:46:44,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:46:44,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:46:44,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:46:44,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:46:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1445248948, now seen corresponding path program 2 times [2023-09-01 11:46:44,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:46:44,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346320494] [2023-09-01 11:46:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:44,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:46:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:44,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:46:44,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346320494] [2023-09-01 11:46:44,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346320494] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:46:44,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:46:44,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 11:46:44,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719126047] [2023-09-01 11:46:44,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:46:44,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:46:44,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:46:44,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:46:44,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:46:44,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 483 [2023-09-01 11:46:44,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:44,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:46:44,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 483 [2023-09-01 11:46:44,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:46:44,968 INFO L130 PetriNetUnfolder]: 182/340 cut-off events. [2023-09-01 11:46:44,968 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 11:46:44,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 340 events. 182/340 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1316 event pairs, 22 based on Foata normal form. 1/297 useless extension candidates. Maximal degree in co-relation 527. Up to 134 conditions per place. [2023-09-01 11:46:44,970 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 54 selfloop transitions, 12 changer transitions 8/74 dead transitions. [2023-09-01 11:46:44,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 74 transitions, 365 flow [2023-09-01 11:46:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:46:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:46:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1618 transitions. [2023-09-01 11:46:44,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41873706004140787 [2023-09-01 11:46:44,975 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1618 transitions. [2023-09-01 11:46:44,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1618 transitions. [2023-09-01 11:46:44,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:46:44,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1618 transitions. [2023-09-01 11:46:44,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.25) internal successors, (1618), 8 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:44,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:44,986 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:44,986 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 113 flow. Second operand 8 states and 1618 transitions. [2023-09-01 11:46:44,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 74 transitions, 365 flow [2023-09-01 11:46:44,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 74 transitions, 363 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 11:46:44,990 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 161 flow [2023-09-01 11:46:44,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=161, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-09-01 11:46:44,991 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-09-01 11:46:44,991 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 161 flow [2023-09-01 11:46:44,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:44,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:46:44,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:46:44,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 11:46:44,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:46:44,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:46:44,993 INFO L85 PathProgramCache]: Analyzing trace with hash 168744916, now seen corresponding path program 1 times [2023-09-01 11:46:44,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:46:44,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729060114] [2023-09-01 11:46:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:44,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:46:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:45,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:46:45,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729060114] [2023-09-01 11:46:45,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729060114] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:46:45,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505579823] [2023-09-01 11:46:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:45,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:46:45,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:46:45,265 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) [2023-09-01 11:46:45,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:46:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:45,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 11:46:45,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:46:46,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:46:46,060 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 164 treesize of output 145 [2023-09-01 11:46:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:46,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:46:46,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:46:46,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-09-01 11:46:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:46,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505579823] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:46:46,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:46:46,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 11:46:46,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828677152] [2023-09-01 11:46:46,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:46:46,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:46:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:46:46,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:46:46,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:46:47,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-09-01 11:46:47,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 161 flow. Second operand has 20 states, 20 states have (on average 186.9) internal successors, (3738), 20 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:47,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:46:47,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-09-01 11:46:47,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:46:48,483 INFO L130 PetriNetUnfolder]: 497/913 cut-off events. [2023-09-01 11:46:48,484 INFO L131 PetriNetUnfolder]: For 583/583 co-relation queries the response was YES. [2023-09-01 11:46:48,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2334 conditions, 913 events. 497/913 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4453 event pairs, 190 based on Foata normal form. 26/827 useless extension candidates. Maximal degree in co-relation 2101. Up to 333 conditions per place. [2023-09-01 11:46:48,490 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 115 selfloop transitions, 24 changer transitions 8/147 dead transitions. [2023-09-01 11:46:48,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 147 transitions, 805 flow [2023-09-01 11:46:48,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 11:46:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 11:46:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3095 transitions. [2023-09-01 11:46:48,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40049171842650105 [2023-09-01 11:46:48,499 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3095 transitions. [2023-09-01 11:46:48,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3095 transitions. [2023-09-01 11:46:48,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:46:48,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3095 transitions. [2023-09-01 11:46:48,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 193.4375) internal successors, (3095), 16 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:48,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:48,521 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:48,522 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 161 flow. Second operand 16 states and 3095 transitions. [2023-09-01 11:46:48,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 147 transitions, 805 flow [2023-09-01 11:46:48,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 147 transitions, 788 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-09-01 11:46:48,531 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 333 flow [2023-09-01 11:46:48,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=333, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2023-09-01 11:46:48,533 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2023-09-01 11:46:48,533 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 333 flow [2023-09-01 11:46:48,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 186.9) internal successors, (3738), 20 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:48,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:46:48,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:46:48,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 11:46:48,749 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 [2023-09-01 11:46:48,749 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:46:48,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:46:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash 924557380, now seen corresponding path program 2 times [2023-09-01 11:46:48,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:46:48,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429960193] [2023-09-01 11:46:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:48,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:46:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:49,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:46:49,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429960193] [2023-09-01 11:46:49,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429960193] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:46:49,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539859084] [2023-09-01 11:46:49,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:46:49,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:46:49,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:46:49,012 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) [2023-09-01 11:46:49,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:46:49,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:46:49,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:46:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 11:46:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:46:49,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:46:49,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 107 [2023-09-01 11:46:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:46:49,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:46:49,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539859084] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:46:49,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:46:49,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-09-01 11:46:49,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043798090] [2023-09-01 11:46:49,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:46:49,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:46:49,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:46:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:46:49,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-09-01 11:46:49,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 483 [2023-09-01 11:46:49,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 192.28571428571428) internal successors, (1346), 7 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:49,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:46:49,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 483 [2023-09-01 11:46:49,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:46:49,794 INFO L130 PetriNetUnfolder]: 559/1071 cut-off events. [2023-09-01 11:46:49,794 INFO L131 PetriNetUnfolder]: For 1615/1615 co-relation queries the response was YES. [2023-09-01 11:46:49,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3020 conditions, 1071 events. 559/1071 cut-off events. For 1615/1615 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5746 event pairs, 88 based on Foata normal form. 38/975 useless extension candidates. Maximal degree in co-relation 2599. Up to 457 conditions per place. [2023-09-01 11:46:49,801 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 72 selfloop transitions, 30 changer transitions 6/108 dead transitions. [2023-09-01 11:46:49,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 108 transitions, 741 flow [2023-09-01 11:46:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:46:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:46:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1595 transitions. [2023-09-01 11:46:49,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41278467908902694 [2023-09-01 11:46:49,806 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1595 transitions. [2023-09-01 11:46:49,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1595 transitions. [2023-09-01 11:46:49,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:46:49,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1595 transitions. [2023-09-01 11:46:49,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 199.375) internal successors, (1595), 8 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:49,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:49,815 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:49,816 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 333 flow. Second operand 8 states and 1595 transitions. [2023-09-01 11:46:49,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 108 transitions, 741 flow [2023-09-01 11:46:49,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 108 transitions, 698 flow, removed 20 selfloop flow, removed 1 redundant places. [2023-09-01 11:46:49,826 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 497 flow [2023-09-01 11:46:49,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=497, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2023-09-01 11:46:49,828 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 44 predicate places. [2023-09-01 11:46:49,828 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 497 flow [2023-09-01 11:46:49,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 192.28571428571428) internal successors, (1346), 7 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:49,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:46:49,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:46:49,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 11:46:50,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 11:46:50,036 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:46:50,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:46:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1125552358, now seen corresponding path program 1 times [2023-09-01 11:46:50,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:46:50,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098670209] [2023-09-01 11:46:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:50,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:46:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:50,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:46:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098670209] [2023-09-01 11:46:50,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098670209] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:46:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299802839] [2023-09-01 11:46:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:50,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:46:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:46:50,195 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) [2023-09-01 11:46:50,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:46:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:46:50,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:46:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:50,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:46:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:50,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299802839] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:46:50,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:46:50,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-09-01 11:46:50,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690239600] [2023-09-01 11:46:50,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:46:50,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:46:50,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:46:50,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:46:50,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:46:50,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 483 [2023-09-01 11:46:50,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 497 flow. Second operand has 7 states, 7 states have (on average 193.42857142857142) internal successors, (1354), 7 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:50,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:46:50,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 483 [2023-09-01 11:46:50,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:46:50,979 INFO L130 PetriNetUnfolder]: 599/1159 cut-off events. [2023-09-01 11:46:50,980 INFO L131 PetriNetUnfolder]: For 2711/2711 co-relation queries the response was YES. [2023-09-01 11:46:50,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3574 conditions, 1159 events. 599/1159 cut-off events. For 2711/2711 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6308 event pairs, 194 based on Foata normal form. 0/1027 useless extension candidates. Maximal degree in co-relation 3090. Up to 234 conditions per place. [2023-09-01 11:46:50,986 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 102 selfloop transitions, 17 changer transitions 8/127 dead transitions. [2023-09-01 11:46:50,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 127 transitions, 980 flow [2023-09-01 11:46:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:46:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:46:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2001 transitions. [2023-09-01 11:46:50,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2023-09-01 11:46:50,992 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2001 transitions. [2023-09-01 11:46:50,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2001 transitions. [2023-09-01 11:46:50,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:46:50,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2001 transitions. [2023-09-01 11:46:50,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 200.1) internal successors, (2001), 10 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) [2023-09-01 11:46:51,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:51,003 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:51,003 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 497 flow. Second operand 10 states and 2001 transitions. [2023-09-01 11:46:51,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 127 transitions, 980 flow [2023-09-01 11:46:51,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 127 transitions, 969 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 11:46:51,014 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 550 flow [2023-09-01 11:46:51,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=550, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2023-09-01 11:46:51,015 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 54 predicate places. [2023-09-01 11:46:51,015 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 550 flow [2023-09-01 11:46:51,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 193.42857142857142) internal successors, (1354), 7 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:51,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:46:51,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:46:51,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:46:51,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:46:51,222 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:46:51,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:46:51,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1919531260, now seen corresponding path program 1 times [2023-09-01 11:46:51,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:46:51,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013961454] [2023-09-01 11:46:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:51,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:46:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:51,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:46:51,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013961454] [2023-09-01 11:46:51,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013961454] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:46:51,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:46:51,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:46:51,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100590365] [2023-09-01 11:46:51,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:46:51,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:46:51,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:46:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:46:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:46:51,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 483 [2023-09-01 11:46:51,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 550 flow. Second operand has 5 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:51,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:46:51,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 483 [2023-09-01 11:46:51,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:46:51,612 INFO L130 PetriNetUnfolder]: 463/919 cut-off events. [2023-09-01 11:46:51,612 INFO L131 PetriNetUnfolder]: For 2411/2411 co-relation queries the response was YES. [2023-09-01 11:46:51,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3081 conditions, 919 events. 463/919 cut-off events. For 2411/2411 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4733 event pairs, 314 based on Foata normal form. 24/942 useless extension candidates. Maximal degree in co-relation 2854. Up to 766 conditions per place. [2023-09-01 11:46:51,618 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 52 selfloop transitions, 2 changer transitions 26/80 dead transitions. [2023-09-01 11:46:51,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 685 flow [2023-09-01 11:46:51,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:46:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:46:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1034 transitions. [2023-09-01 11:46:51,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42815734989648035 [2023-09-01 11:46:51,621 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1034 transitions. [2023-09-01 11:46:51,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1034 transitions. [2023-09-01 11:46:51,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:46:51,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1034 transitions. [2023-09-01 11:46:51,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.8) internal successors, (1034), 5 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:51,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:51,628 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:51,629 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 550 flow. Second operand 5 states and 1034 transitions. [2023-09-01 11:46:51,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 685 flow [2023-09-01 11:46:51,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 635 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-09-01 11:46:51,639 INFO L231 Difference]: Finished difference. Result has 74 places, 54 transitions, 343 flow [2023-09-01 11:46:51,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=74, PETRI_TRANSITIONS=54} [2023-09-01 11:46:51,641 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2023-09-01 11:46:51,642 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 54 transitions, 343 flow [2023-09-01 11:46:51,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.6) internal successors, (1008), 5 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:51,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:46:51,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:46:51,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 11:46:51,643 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:46:51,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:46:51,647 INFO L85 PathProgramCache]: Analyzing trace with hash -106514784, now seen corresponding path program 1 times [2023-09-01 11:46:51,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:46:51,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355367081] [2023-09-01 11:46:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:51,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:46:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:46:51,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:46:51,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355367081] [2023-09-01 11:46:51,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355367081] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:46:51,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:46:51,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 11:46:51,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575228486] [2023-09-01 11:46:51,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:46:51,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:46:51,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:46:51,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:46:51,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:46:51,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 483 [2023-09-01 11:46:51,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 54 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:51,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:46:51,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 483 [2023-09-01 11:46:51,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:46:52,008 INFO L130 PetriNetUnfolder]: 266/526 cut-off events. [2023-09-01 11:46:52,008 INFO L131 PetriNetUnfolder]: For 1644/1644 co-relation queries the response was YES. [2023-09-01 11:46:52,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 526 events. 266/526 cut-off events. For 1644/1644 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2212 event pairs, 158 based on Foata normal form. 24/549 useless extension candidates. Maximal degree in co-relation 1793. Up to 375 conditions per place. [2023-09-01 11:46:52,012 INFO L137 encePairwiseOnDemand]: 478/483 looper letters, 32 selfloop transitions, 4 changer transitions 22/58 dead transitions. [2023-09-01 11:46:52,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 430 flow [2023-09-01 11:46:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:46:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:46:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1032 transitions. [2023-09-01 11:46:52,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42732919254658386 [2023-09-01 11:46:52,016 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1032 transitions. [2023-09-01 11:46:52,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1032 transitions. [2023-09-01 11:46:52,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:46:52,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1032 transitions. [2023-09-01 11:46:52,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.4) internal successors, (1032), 5 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:52,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:52,023 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 483.0) internal successors, (2898), 6 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:52,023 INFO L175 Difference]: Start difference. First operand has 74 places, 54 transitions, 343 flow. Second operand 5 states and 1032 transitions. [2023-09-01 11:46:52,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 430 flow [2023-09-01 11:46:52,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 58 transitions, 392 flow, removed 8 selfloop flow, removed 9 redundant places. [2023-09-01 11:46:52,027 INFO L231 Difference]: Finished difference. Result has 60 places, 36 transitions, 176 flow [2023-09-01 11:46:52,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=60, PETRI_TRANSITIONS=36} [2023-09-01 11:46:52,028 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2023-09-01 11:46:52,029 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 36 transitions, 176 flow [2023-09-01 11:46:52,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:46:52,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:46:52,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:46:52,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 11:46:52,030 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:46:52,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:46:52,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1869828197, now seen corresponding path program 1 times [2023-09-01 11:46:52,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:46:52,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64793367] [2023-09-01 11:46:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:46:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:52,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:46:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64793367] [2023-09-01 11:46:52,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64793367] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:46:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5049440] [2023-09-01 11:46:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:46:52,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:46:52,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:46:52,653 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) [2023-09-01 11:46:52,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:46:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:46:52,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 11:46:52,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:46:52,877 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 [2023-09-01 11:46:52,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:46:53,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:46:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:46:53,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:01,780 WARN L222 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:47:01,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:01,966 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 48 treesize of output 37 [2023-09-01 11:47:01,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:01,981 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 598 treesize of output 546 [2023-09-01 11:47:02,024 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:02,025 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 262 treesize of output 255 [2023-09-01 11:47:02,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:02,039 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 246 treesize of output 223 [2023-09-01 11:47:02,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:02,312 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 48 treesize of output 37 [2023-09-01 11:47:02,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:02,325 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 1206 treesize of output 1090 [2023-09-01 11:47:02,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:02,366 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 262 treesize of output 255 [2023-09-01 11:47:02,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:02,381 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 246 treesize of output 223 [2023-09-01 11:47:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5049440] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:02,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:02,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2023-09-01 11:47:02,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385739353] [2023-09-01 11:47:02,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:02,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 11:47:02,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:02,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 11:47:02,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=529, Unknown=33, NotChecked=0, Total=702 [2023-09-01 11:47:03,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-09-01 11:47:03,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 36 transitions, 176 flow. Second operand has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:03,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:03,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-09-01 11:47:03,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:04,406 INFO L130 PetriNetUnfolder]: 588/1042 cut-off events. [2023-09-01 11:47:04,406 INFO L131 PetriNetUnfolder]: For 3058/3058 co-relation queries the response was YES. [2023-09-01 11:47:04,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3664 conditions, 1042 events. 588/1042 cut-off events. For 3058/3058 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4968 event pairs, 76 based on Foata normal form. 32/1072 useless extension candidates. Maximal degree in co-relation 3626. Up to 313 conditions per place. [2023-09-01 11:47:04,413 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 77 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2023-09-01 11:47:04,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 100 transitions, 672 flow [2023-09-01 11:47:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:47:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:47:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1869 transitions. [2023-09-01 11:47:04,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2976588628762542 [2023-09-01 11:47:04,419 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1869 transitions. [2023-09-01 11:47:04,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1869 transitions. [2023-09-01 11:47:04,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:04,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1869 transitions. [2023-09-01 11:47:04,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 143.76923076923077) internal successors, (1869), 13 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:04,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:04,431 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:04,432 INFO L175 Difference]: Start difference. First operand has 60 places, 36 transitions, 176 flow. Second operand 13 states and 1869 transitions. [2023-09-01 11:47:04,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 100 transitions, 672 flow [2023-09-01 11:47:04,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 100 transitions, 554 flow, removed 55 selfloop flow, removed 9 redundant places. [2023-09-01 11:47:04,444 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 281 flow [2023-09-01 11:47:04,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=281, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-09-01 11:47:04,446 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 33 predicate places. [2023-09-01 11:47:04,446 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 281 flow [2023-09-01 11:47:04,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:04,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:04,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:04,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:04,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:04,654 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:04,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:04,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1008614899, now seen corresponding path program 2 times [2023-09-01 11:47:04,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:04,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663259684] [2023-09-01 11:47:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:04,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:05,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:05,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663259684] [2023-09-01 11:47:05,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663259684] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:05,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571330941] [2023-09-01 11:47:05,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:47:05,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:05,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:05,203 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) [2023-09-01 11:47:05,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 11:47:05,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:47:05,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:05,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:47:05,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:05,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:05,732 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:47:05,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 91 [2023-09-01 11:47:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:05,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571330941] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:05,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:47:05,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 23 [2023-09-01 11:47:05,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080968958] [2023-09-01 11:47:05,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:05,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 11:47:05,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 11:47:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:47:06,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-09-01 11:47:06,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 281 flow. Second operand has 10 states, 10 states have (on average 179.9) internal successors, (1799), 10 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:06,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:06,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-09-01 11:47:06,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:06,742 INFO L130 PetriNetUnfolder]: 702/1236 cut-off events. [2023-09-01 11:47:06,742 INFO L131 PetriNetUnfolder]: For 2149/2149 co-relation queries the response was YES. [2023-09-01 11:47:06,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4479 conditions, 1236 events. 702/1236 cut-off events. For 2149/2149 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6064 event pairs, 198 based on Foata normal form. 4/1240 useless extension candidates. Maximal degree in co-relation 4439. Up to 652 conditions per place. [2023-09-01 11:47:06,750 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 72 selfloop transitions, 39 changer transitions 0/111 dead transitions. [2023-09-01 11:47:06,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 111 transitions, 833 flow [2023-09-01 11:47:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:47:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:47:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2396 transitions. [2023-09-01 11:47:06,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38158942506768595 [2023-09-01 11:47:06,757 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2396 transitions. [2023-09-01 11:47:06,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2396 transitions. [2023-09-01 11:47:06,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:06,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2396 transitions. [2023-09-01 11:47:06,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 184.30769230769232) internal successors, (2396), 13 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:06,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:06,772 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:06,772 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 281 flow. Second operand 13 states and 2396 transitions. [2023-09-01 11:47:06,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 111 transitions, 833 flow [2023-09-01 11:47:06,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 111 transitions, 799 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-09-01 11:47:06,779 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 556 flow [2023-09-01 11:47:06,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=556, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-09-01 11:47:06,781 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 46 predicate places. [2023-09-01 11:47:06,781 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 556 flow [2023-09-01 11:47:06,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.9) internal successors, (1799), 10 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:06,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:06,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:06,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:06,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:06,987 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:06,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:06,988 INFO L85 PathProgramCache]: Analyzing trace with hash -571449319, now seen corresponding path program 3 times [2023-09-01 11:47:06,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:06,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715642791] [2023-09-01 11:47:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:06,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:07,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:07,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715642791] [2023-09-01 11:47:07,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715642791] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:07,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97514820] [2023-09-01 11:47:07,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:47:07,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:07,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:07,579 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) [2023-09-01 11:47:07,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 11:47:07,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:47:07,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:07,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:47:07,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:07,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:08,148 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:47:08,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-09-01 11:47:08,171 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:47:08,172 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 12 treesize of output 4 [2023-09-01 11:47:08,178 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:47:08,178 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 12 treesize of output 4 [2023-09-01 11:47:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:08,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97514820] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:08,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:08,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-09-01 11:47:08,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280689864] [2023-09-01 11:47:08,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:08,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 11:47:08,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 11:47:08,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:47:09,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 483 [2023-09-01 11:47:09,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 556 flow. Second operand has 22 states, 22 states have (on average 177.72727272727272) internal successors, (3910), 22 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:09,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:09,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 483 [2023-09-01 11:47:09,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:10,282 INFO L130 PetriNetUnfolder]: 790/1412 cut-off events. [2023-09-01 11:47:10,283 INFO L131 PetriNetUnfolder]: For 5103/5103 co-relation queries the response was YES. [2023-09-01 11:47:10,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6307 conditions, 1412 events. 790/1412 cut-off events. For 5103/5103 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7256 event pairs, 272 based on Foata normal form. 32/1444 useless extension candidates. Maximal degree in co-relation 6260. Up to 759 conditions per place. [2023-09-01 11:47:10,295 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 84 selfloop transitions, 33 changer transitions 0/117 dead transitions. [2023-09-01 11:47:10,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 1096 flow [2023-09-01 11:47:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:47:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:47:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2004 transitions. [2023-09-01 11:47:10,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3771880293619424 [2023-09-01 11:47:10,324 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2004 transitions. [2023-09-01 11:47:10,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2004 transitions. [2023-09-01 11:47:10,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:10,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2004 transitions. [2023-09-01 11:47:10,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 182.1818181818182) internal successors, (2004), 11 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:10,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:10,335 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:10,335 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 556 flow. Second operand 11 states and 2004 transitions. [2023-09-01 11:47:10,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 1096 flow [2023-09-01 11:47:10,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 1006 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-09-01 11:47:10,353 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 688 flow [2023-09-01 11:47:10,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=688, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2023-09-01 11:47:10,353 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 55 predicate places. [2023-09-01 11:47:10,354 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 688 flow [2023-09-01 11:47:10,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 177.72727272727272) internal successors, (3910), 22 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:10,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:10,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:10,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 11:47:10,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:10,561 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:10,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:10,561 INFO L85 PathProgramCache]: Analyzing trace with hash -20464861, now seen corresponding path program 4 times [2023-09-01 11:47:10,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:10,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568090933] [2023-09-01 11:47:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:10,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:11,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:11,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568090933] [2023-09-01 11:47:11,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568090933] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:11,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972512924] [2023-09-01 11:47:11,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:47:11,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:11,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:11,053 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) [2023-09-01 11:47:11,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 11:47:11,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:47:11,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:11,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 11:47:11,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:11,230 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 [2023-09-01 11:47:11,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:47:11,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:47:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:11,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:47:11,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972512924] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:11,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:11,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 6] total 22 [2023-09-01 11:47:11,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815318330] [2023-09-01 11:47:11,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:11,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 11:47:11,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:11,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 11:47:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:47:13,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 483 [2023-09-01 11:47:13,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 688 flow. Second operand has 22 states, 22 states have (on average 171.04545454545453) internal successors, (3763), 22 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:13,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:13,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 483 [2023-09-01 11:47:13,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:14,558 INFO L130 PetriNetUnfolder]: 948/1710 cut-off events. [2023-09-01 11:47:14,558 INFO L131 PetriNetUnfolder]: For 7364/7364 co-relation queries the response was YES. [2023-09-01 11:47:14,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7957 conditions, 1710 events. 948/1710 cut-off events. For 7364/7364 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9299 event pairs, 230 based on Foata normal form. 32/1742 useless extension candidates. Maximal degree in co-relation 7906. Up to 894 conditions per place. [2023-09-01 11:47:14,574 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 86 selfloop transitions, 61 changer transitions 0/147 dead transitions. [2023-09-01 11:47:14,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 147 transitions, 1409 flow [2023-09-01 11:47:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:47:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:47:14,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2286 transitions. [2023-09-01 11:47:14,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36407071189679885 [2023-09-01 11:47:14,580 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2286 transitions. [2023-09-01 11:47:14,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2286 transitions. [2023-09-01 11:47:14,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:14,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2286 transitions. [2023-09-01 11:47:14,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 175.84615384615384) internal successors, (2286), 13 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:14,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:14,593 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:14,593 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 688 flow. Second operand 13 states and 2286 transitions. [2023-09-01 11:47:14,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 147 transitions, 1409 flow [2023-09-01 11:47:14,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 147 transitions, 1329 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-09-01 11:47:14,623 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 1106 flow [2023-09-01 11:47:14,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1106, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2023-09-01 11:47:14,624 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-09-01 11:47:14,624 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 1106 flow [2023-09-01 11:47:14,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 171.04545454545453) internal successors, (3763), 22 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:14,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:14,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:14,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:14,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:14,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:14,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:14,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1451051645, now seen corresponding path program 5 times [2023-09-01 11:47:14,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:14,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470458007] [2023-09-01 11:47:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:14,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:15,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:15,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470458007] [2023-09-01 11:47:15,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470458007] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:15,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50725300] [2023-09-01 11:47:15,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:47:15,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:15,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:15,309 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) [2023-09-01 11:47:15,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 11:47:15,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:47:15,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:15,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 11:47:15,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:47:15,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:15,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50725300] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:15,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:15,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-09-01 11:47:15,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721648811] [2023-09-01 11:47:15,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:15,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:47:15,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:15,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:47:15,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-09-01 11:47:15,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 483 [2023-09-01 11:47:15,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 1106 flow. Second operand has 6 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:15,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:15,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 483 [2023-09-01 11:47:15,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:15,967 INFO L130 PetriNetUnfolder]: 932/1654 cut-off events. [2023-09-01 11:47:15,968 INFO L131 PetriNetUnfolder]: For 9795/9795 co-relation queries the response was YES. [2023-09-01 11:47:15,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8750 conditions, 1654 events. 932/1654 cut-off events. For 9795/9795 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8865 event pairs, 310 based on Foata normal form. 4/1658 useless extension candidates. Maximal degree in co-relation 8693. Up to 1017 conditions per place. [2023-09-01 11:47:15,987 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 100 selfloop transitions, 30 changer transitions 0/130 dead transitions. [2023-09-01 11:47:15,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 130 transitions, 1487 flow [2023-09-01 11:47:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:47:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:47:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1197 transitions. [2023-09-01 11:47:15,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2023-09-01 11:47:15,993 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1197 transitions. [2023-09-01 11:47:15,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1197 transitions. [2023-09-01 11:47:15,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:15,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1197 transitions. [2023-09-01 11:47:15,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:16,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:16,006 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:16,007 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 1106 flow. Second operand 6 states and 1197 transitions. [2023-09-01 11:47:16,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 130 transitions, 1487 flow [2023-09-01 11:47:16,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1441 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-09-01 11:47:16,050 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 1130 flow [2023-09-01 11:47:16,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1130, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2023-09-01 11:47:16,051 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 67 predicate places. [2023-09-01 11:47:16,051 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 1130 flow [2023-09-01 11:47:16,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:16,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:16,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:16,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:16,252 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,SelfDestructingSolverStorable11 [2023-09-01 11:47:16,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:16,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash -900067187, now seen corresponding path program 6 times [2023-09-01 11:47:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:16,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944531220] [2023-09-01 11:47:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:16,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944531220] [2023-09-01 11:47:16,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944531220] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47364857] [2023-09-01 11:47:16,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:47:16,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:16,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:16,685 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) [2023-09-01 11:47:16,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 11:47:16,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 11:47:16,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:16,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:47:16,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:17,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:17,256 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:47:17,257 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 20 treesize of output 4 [2023-09-01 11:47:17,300 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:47:17,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 66 [2023-09-01 11:47:17,326 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:47:17,326 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 20 treesize of output 4 [2023-09-01 11:47:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:17,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47364857] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:17,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:47:17,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-09-01 11:47:17,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910989580] [2023-09-01 11:47:17,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:17,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 11:47:17,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:17,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 11:47:17,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-09-01 11:47:17,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-09-01 11:47:17,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 1130 flow. Second operand has 10 states, 10 states have (on average 179.9) internal successors, (1799), 10 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:17,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:17,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-09-01 11:47:17,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:18,385 INFO L130 PetriNetUnfolder]: 916/1598 cut-off events. [2023-09-01 11:47:18,386 INFO L131 PetriNetUnfolder]: For 9260/9260 co-relation queries the response was YES. [2023-09-01 11:47:18,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8585 conditions, 1598 events. 916/1598 cut-off events. For 9260/9260 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8387 event pairs, 216 based on Foata normal form. 4/1602 useless extension candidates. Maximal degree in co-relation 8530. Up to 812 conditions per place. [2023-09-01 11:47:18,406 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 80 selfloop transitions, 62 changer transitions 0/142 dead transitions. [2023-09-01 11:47:18,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1599 flow [2023-09-01 11:47:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:47:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:47:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2395 transitions. [2023-09-01 11:47:18,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814301640388597 [2023-09-01 11:47:18,432 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2395 transitions. [2023-09-01 11:47:18,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2395 transitions. [2023-09-01 11:47:18,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:18,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2395 transitions. [2023-09-01 11:47:18,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 184.23076923076923) internal successors, (2395), 13 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:18,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:18,442 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:18,443 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 1130 flow. Second operand 13 states and 2395 transitions. [2023-09-01 11:47:18,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1599 flow [2023-09-01 11:47:18,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 142 transitions, 1541 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-09-01 11:47:18,474 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 1198 flow [2023-09-01 11:47:18,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1198, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2023-09-01 11:47:18,475 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 76 predicate places. [2023-09-01 11:47:18,475 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 1198 flow [2023-09-01 11:47:18,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.9) internal successors, (1799), 10 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:18,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:18,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:18,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:18,676 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,SelfDestructingSolverStorable12 [2023-09-01 11:47:18,676 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:18,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:18,677 INFO L85 PathProgramCache]: Analyzing trace with hash -525642385, now seen corresponding path program 7 times [2023-09-01 11:47:18,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:18,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265574821] [2023-09-01 11:47:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:18,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:19,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265574821] [2023-09-01 11:47:19,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265574821] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578593557] [2023-09-01 11:47:19,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:47:19,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:19,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:19,059 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) [2023-09-01 11:47:19,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 11:47:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:19,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 11:47:19,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:19,258 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 [2023-09-01 11:47:19,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:47:19,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:47:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:19,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:19,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:19,866 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 48 treesize of output 37 [2023-09-01 11:47:19,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:19,885 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 598 treesize of output 546 [2023-09-01 11:47:19,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:19,915 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 262 treesize of output 255 [2023-09-01 11:47:19,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:19,932 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 246 treesize of output 223 [2023-09-01 11:47:20,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:20,176 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 48 treesize of output 37 [2023-09-01 11:47:20,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:20,186 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 1206 treesize of output 1090 [2023-09-01 11:47:20,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:20,219 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 262 treesize of output 239 [2023-09-01 11:47:20,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:20,230 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 230 treesize of output 223 [2023-09-01 11:47:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:20,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578593557] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:20,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:20,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2023-09-01 11:47:20,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760942025] [2023-09-01 11:47:20,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:20,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 11:47:20,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:20,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 11:47:20,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=683, Unknown=11, NotChecked=0, Total=812 [2023-09-01 11:47:22,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-09-01 11:47:22,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 1198 flow. Second operand has 29 states, 29 states have (on average 138.51724137931035) internal successors, (4017), 29 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:22,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:22,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-09-01 11:47:22,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:23,669 INFO L130 PetriNetUnfolder]: 1202/2132 cut-off events. [2023-09-01 11:47:23,670 INFO L131 PetriNetUnfolder]: For 13561/13561 co-relation queries the response was YES. [2023-09-01 11:47:23,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11780 conditions, 2132 events. 1202/2132 cut-off events. For 13561/13561 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12156 event pairs, 228 based on Foata normal form. 4/2136 useless extension candidates. Maximal degree in co-relation 11720. Up to 927 conditions per place. [2023-09-01 11:47:23,688 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 79 selfloop transitions, 103 changer transitions 0/182 dead transitions. [2023-09-01 11:47:23,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 182 transitions, 2240 flow [2023-09-01 11:47:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:47:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:47:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1988 transitions. [2023-09-01 11:47:23,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2939958592132505 [2023-09-01 11:47:23,693 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1988 transitions. [2023-09-01 11:47:23,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1988 transitions. [2023-09-01 11:47:23,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:23,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1988 transitions. [2023-09-01 11:47:23,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 142.0) internal successors, (1988), 14 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:23,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:23,702 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:23,702 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 1198 flow. Second operand 14 states and 1988 transitions. [2023-09-01 11:47:23,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 182 transitions, 2240 flow [2023-09-01 11:47:23,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 182 transitions, 2115 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-09-01 11:47:23,784 INFO L231 Difference]: Finished difference. Result has 110 places, 144 transitions, 1863 flow [2023-09-01 11:47:23,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1863, PETRI_PLACES=110, PETRI_TRANSITIONS=144} [2023-09-01 11:47:23,785 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 85 predicate places. [2023-09-01 11:47:23,785 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 144 transitions, 1863 flow [2023-09-01 11:47:23,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 138.51724137931035) internal successors, (4017), 29 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:23,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:23,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:23,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:23,993 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,SelfDestructingSolverStorable13 [2023-09-01 11:47:23,993 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:23,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:23,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1427234071, now seen corresponding path program 8 times [2023-09-01 11:47:23,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:23,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706421251] [2023-09-01 11:47:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:23,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:24,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:24,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706421251] [2023-09-01 11:47:24,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706421251] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:24,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034700088] [2023-09-01 11:47:24,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:47:24,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:24,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:24,397 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) [2023-09-01 11:47:24,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 11:47:24,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:47:24,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:24,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:47:24,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:24,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:24,865 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:47:24,866 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 20 treesize of output 4 [2023-09-01 11:47:24,910 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:47:24,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 66 [2023-09-01 11:47:24,933 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:47:24,934 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 20 treesize of output 4 [2023-09-01 11:47:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:25,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034700088] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:25,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:25,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-09-01 11:47:25,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279317954] [2023-09-01 11:47:25,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 11:47:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 11:47:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:47:26,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 483 [2023-09-01 11:47:26,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 144 transitions, 1863 flow. Second operand has 22 states, 22 states have (on average 177.8181818181818) internal successors, (3912), 22 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:26,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:26,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 483 [2023-09-01 11:47:26,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:26,738 INFO L130 PetriNetUnfolder]: 1170/2100 cut-off events. [2023-09-01 11:47:26,738 INFO L131 PetriNetUnfolder]: For 17969/17969 co-relation queries the response was YES. [2023-09-01 11:47:26,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13038 conditions, 2100 events. 1170/2100 cut-off events. For 17969/17969 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11860 event pairs, 292 based on Foata normal form. 32/2132 useless extension candidates. Maximal degree in co-relation 12973. Up to 1203 conditions per place. [2023-09-01 11:47:26,751 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 128 selfloop transitions, 55 changer transitions 0/183 dead transitions. [2023-09-01 11:47:26,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 183 transitions, 2513 flow [2023-09-01 11:47:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:47:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:47:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2003 transitions. [2023-09-01 11:47:26,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769998117824205 [2023-09-01 11:47:26,759 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2003 transitions. [2023-09-01 11:47:26,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2003 transitions. [2023-09-01 11:47:26,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:26,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2003 transitions. [2023-09-01 11:47:26,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 182.0909090909091) internal successors, (2003), 11 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:26,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:26,766 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:26,766 INFO L175 Difference]: Start difference. First operand has 110 places, 144 transitions, 1863 flow. Second operand 11 states and 2003 transitions. [2023-09-01 11:47:26,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 183 transitions, 2513 flow [2023-09-01 11:47:26,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 183 transitions, 2392 flow, removed 27 selfloop flow, removed 6 redundant places. [2023-09-01 11:47:26,862 INFO L231 Difference]: Finished difference. Result has 118 places, 150 transitions, 2021 flow [2023-09-01 11:47:26,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2021, PETRI_PLACES=118, PETRI_TRANSITIONS=150} [2023-09-01 11:47:26,864 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 93 predicate places. [2023-09-01 11:47:26,864 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 150 transitions, 2021 flow [2023-09-01 11:47:26,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 177.8181818181818) internal successors, (3912), 22 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:26,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:26,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:26,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:27,070 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,SelfDestructingSolverStorable14 [2023-09-01 11:47:27,070 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:27,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:27,070 INFO L85 PathProgramCache]: Analyzing trace with hash -134892999, now seen corresponding path program 9 times [2023-09-01 11:47:27,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:27,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267539391] [2023-09-01 11:47:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:27,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:27,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:27,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267539391] [2023-09-01 11:47:27,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267539391] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:27,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315217135] [2023-09-01 11:47:27,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:47:27,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:27,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:27,779 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) [2023-09-01 11:47:27,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 11:47:27,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:47:27,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 11:47:27,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:28,050 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 [2023-09-01 11:47:28,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:47:28,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:47:28,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:47:28,277 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:47:28,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-09-01 11:47:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:28,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:28,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:28,843 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 42 treesize of output 31 [2023-09-01 11:47:28,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:28,851 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 70 treesize of output 66 [2023-09-01 11:47:28,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:28,860 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 54 treesize of output 55 [2023-09-01 11:47:28,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:28,897 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 42 treesize of output 31 [2023-09-01 11:47:28,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:28,905 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 70 treesize of output 66 [2023-09-01 11:47:28,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:28,913 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 54 treesize of output 55 [2023-09-01 11:47:28,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:28,936 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 188 treesize of output 104 [2023-09-01 11:47:28,952 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:47:28,953 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 3750 treesize of output 3350 [2023-09-01 11:47:29,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:29,055 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 854 treesize of output 806 [2023-09-01 11:47:29,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:29,076 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 752 treesize of output 664 [2023-09-01 11:47:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:29,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315217135] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:29,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:29,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2023-09-01 11:47:29,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574280534] [2023-09-01 11:47:29,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:29,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 11:47:29,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:29,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 11:47:29,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=800, Unknown=8, NotChecked=0, Total=930 [2023-09-01 11:47:30,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-09-01 11:47:30,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 150 transitions, 2021 flow. Second operand has 31 states, 31 states have (on average 138.6451612903226) internal successors, (4298), 31 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:30,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:30,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-09-01 11:47:30,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:31,242 INFO L130 PetriNetUnfolder]: 1202/2156 cut-off events. [2023-09-01 11:47:31,242 INFO L131 PetriNetUnfolder]: For 20029/20029 co-relation queries the response was YES. [2023-09-01 11:47:31,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13749 conditions, 2156 events. 1202/2156 cut-off events. For 20029/20029 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12246 event pairs, 190 based on Foata normal form. 40/2196 useless extension candidates. Maximal degree in co-relation 13680. Up to 1132 conditions per place. [2023-09-01 11:47:31,259 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 135 selfloop transitions, 57 changer transitions 0/192 dead transitions. [2023-09-01 11:47:31,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 192 transitions, 2825 flow [2023-09-01 11:47:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:47:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:47:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1570 transitions. [2023-09-01 11:47:31,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2955015998494259 [2023-09-01 11:47:31,263 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1570 transitions. [2023-09-01 11:47:31,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1570 transitions. [2023-09-01 11:47:31,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:31,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1570 transitions. [2023-09-01 11:47:31,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 142.72727272727272) internal successors, (1570), 11 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:31,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:31,269 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:31,270 INFO L175 Difference]: Start difference. First operand has 118 places, 150 transitions, 2021 flow. Second operand 11 states and 1570 transitions. [2023-09-01 11:47:31,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 192 transitions, 2825 flow [2023-09-01 11:47:31,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 192 transitions, 2736 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-09-01 11:47:31,360 INFO L231 Difference]: Finished difference. Result has 124 places, 153 transitions, 2146 flow [2023-09-01 11:47:31,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2146, PETRI_PLACES=124, PETRI_TRANSITIONS=153} [2023-09-01 11:47:31,361 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 99 predicate places. [2023-09-01 11:47:31,361 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 153 transitions, 2146 flow [2023-09-01 11:47:31,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 138.6451612903226) internal successors, (4298), 31 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:31,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:31,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:31,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:31,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 11:47:31,568 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:31,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:31,568 INFO L85 PathProgramCache]: Analyzing trace with hash -71803201, now seen corresponding path program 10 times [2023-09-01 11:47:31,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:31,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23066257] [2023-09-01 11:47:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:31,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:32,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:32,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23066257] [2023-09-01 11:47:32,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23066257] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:32,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354831169] [2023-09-01 11:47:32,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:47:32,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:32,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:32,081 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) [2023-09-01 11:47:32,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 11:47:32,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:47:32,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:32,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 11:47:32,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:32,244 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 [2023-09-01 11:47:32,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:47:32,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:47:32,378 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 14 treesize of output 16 [2023-09-01 11:47:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:32,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:32,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:32,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 107 [2023-09-01 11:47:32,955 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:47:32,956 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 2126 treesize of output 1886 [2023-09-01 11:47:32,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:32,990 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 922 treesize of output 826 [2023-09-01 11:47:33,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:33,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 818 treesize of output 766 [2023-09-01 11:47:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:33,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354831169] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:33,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:33,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-09-01 11:47:33,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35594410] [2023-09-01 11:47:33,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:33,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 11:47:33,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:33,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 11:47:33,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=657, Unknown=21, NotChecked=0, Total=812 [2023-09-01 11:47:35,787 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] [2023-09-01 11:47:37,916 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] [2023-09-01 11:47:37,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-09-01 11:47:37,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 153 transitions, 2146 flow. Second operand has 29 states, 29 states have (on average 138.6206896551724) internal successors, (4020), 29 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:37,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:37,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-09-01 11:47:37,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:40,471 INFO L130 PetriNetUnfolder]: 2136/3876 cut-off events. [2023-09-01 11:47:40,471 INFO L131 PetriNetUnfolder]: For 36806/36806 co-relation queries the response was YES. [2023-09-01 11:47:40,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23507 conditions, 3876 events. 2136/3876 cut-off events. For 36806/36806 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 24984 event pairs, 432 based on Foata normal form. 24/3900 useless extension candidates. Maximal degree in co-relation 23436. Up to 1152 conditions per place. [2023-09-01 11:47:40,497 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 183 selfloop transitions, 122 changer transitions 0/305 dead transitions. [2023-09-01 11:47:40,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 305 transitions, 4306 flow [2023-09-01 11:47:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:47:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:47:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2739 transitions. [2023-09-01 11:47:40,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2984635501797973 [2023-09-01 11:47:40,502 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2739 transitions. [2023-09-01 11:47:40,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2739 transitions. [2023-09-01 11:47:40,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:40,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2739 transitions. [2023-09-01 11:47:40,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 144.1578947368421) internal successors, (2739), 19 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:40,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:40,511 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:40,512 INFO L175 Difference]: Start difference. First operand has 124 places, 153 transitions, 2146 flow. Second operand 19 states and 2739 transitions. [2023-09-01 11:47:40,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 305 transitions, 4306 flow [2023-09-01 11:47:40,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 305 transitions, 4137 flow, removed 47 selfloop flow, removed 8 redundant places. [2023-09-01 11:47:40,704 INFO L231 Difference]: Finished difference. Result has 141 places, 190 transitions, 2848 flow [2023-09-01 11:47:40,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2848, PETRI_PLACES=141, PETRI_TRANSITIONS=190} [2023-09-01 11:47:40,705 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 116 predicate places. [2023-09-01 11:47:40,705 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 190 transitions, 2848 flow [2023-09-01 11:47:40,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 138.6206896551724) internal successors, (4020), 29 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:40,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:40,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:40,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:40,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 11:47:40,912 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:40,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1227810281, now seen corresponding path program 11 times [2023-09-01 11:47:40,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:40,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374431117] [2023-09-01 11:47:40,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:40,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:41,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:41,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374431117] [2023-09-01 11:47:41,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374431117] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:41,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988638479] [2023-09-01 11:47:41,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:47:41,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:41,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:41,465 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:41,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 11:47:41,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:47:41,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:41,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 11:47:41,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:47:41,676 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 14 treesize of output 16 [2023-09-01 11:47:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:47:41,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:42,158 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse5 (forall ((~a2~0.offset Int) (v_ArrVal_607 (Array Int Int)) (~a2~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_607) ~a2~0.base) (+ ~a2~0.offset .cse3)) |c_thread1Thread1of1ForFork0_#t~mem1#1|))))) (and (forall ((~a2~0.offset Int) (v_ArrVal_607 (Array Int Int)) (~a2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_607))) (let ((.cse2 (select .cse4 ~a2~0.base))) (let ((.cse1 (select .cse2 ~a2~0.offset)) (.cse0 (select (select .cse4 c_~a1~0.base) c_~a1~0.offset))) (or (< (+ 2147483647 .cse0) .cse1) (= .cse0 .cse1) (not (= (select .cse2 (+ ~a2~0.offset .cse3)) |c_thread1Thread1of1ForFork0_#t~mem1#1|)) (< (+ .cse1 2147483648) .cse0)))))) (or (< 0 c_~n1~0) .cse5) (or (< 0 c_~n2~0) .cse5)))) is different from false [2023-09-01 11:47:42,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:42,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 365 treesize of output 429 [2023-09-01 11:47:42,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:42,341 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 245 treesize of output 244 [2023-09-01 11:47:42,362 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 215 treesize of output 209 [2023-09-01 11:47:42,383 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 209 treesize of output 203 [2023-09-01 11:47:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:47:45,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988638479] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:45,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:45,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2023-09-01 11:47:45,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406347717] [2023-09-01 11:47:45,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:45,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 11:47:45,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:45,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 11:47:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=515, Unknown=1, NotChecked=46, Total=650 [2023-09-01 11:47:45,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 483 [2023-09-01 11:47:45,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 190 transitions, 2848 flow. Second operand has 26 states, 26 states have (on average 143.03846153846155) internal successors, (3719), 26 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:45,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:45,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 483 [2023-09-01 11:47:45,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:48,955 INFO L130 PetriNetUnfolder]: 2032/3676 cut-off events. [2023-09-01 11:47:48,956 INFO L131 PetriNetUnfolder]: For 41979/41979 co-relation queries the response was YES. [2023-09-01 11:47:48,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23868 conditions, 3676 events. 2032/3676 cut-off events. For 41979/41979 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23463 event pairs, 694 based on Foata normal form. 76/3752 useless extension candidates. Maximal degree in co-relation 23791. Up to 2697 conditions per place. [2023-09-01 11:47:48,979 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 162 selfloop transitions, 59 changer transitions 0/221 dead transitions. [2023-09-01 11:47:48,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 221 transitions, 3556 flow [2023-09-01 11:47:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:47:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:47:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1614 transitions. [2023-09-01 11:47:48,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3037831733483907 [2023-09-01 11:47:48,982 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1614 transitions. [2023-09-01 11:47:48,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1614 transitions. [2023-09-01 11:47:48,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:48,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1614 transitions. [2023-09-01 11:47:48,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 146.72727272727272) internal successors, (1614), 11 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,988 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,988 INFO L175 Difference]: Start difference. First operand has 141 places, 190 transitions, 2848 flow. Second operand 11 states and 1614 transitions. [2023-09-01 11:47:48,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 221 transitions, 3556 flow [2023-09-01 11:47:49,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 221 transitions, 3314 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-09-01 11:47:49,128 INFO L231 Difference]: Finished difference. Result has 144 places, 185 transitions, 2678 flow [2023-09-01 11:47:49,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2678, PETRI_PLACES=144, PETRI_TRANSITIONS=185} [2023-09-01 11:47:49,128 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 119 predicate places. [2023-09-01 11:47:49,128 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 185 transitions, 2678 flow [2023-09-01 11:47:49,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 143.03846153846155) internal successors, (3719), 26 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:49,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:49,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:49,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:49,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:49,329 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:49,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash 806001645, now seen corresponding path program 12 times [2023-09-01 11:47:49,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:49,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109261495] [2023-09-01 11:47:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:49,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:49,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109261495] [2023-09-01 11:47:49,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109261495] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:49,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869145278] [2023-09-01 11:47:49,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:47:49,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:49,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:49,797 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:49,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 11:47:49,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 11:47:49,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:47:49,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:50,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:50,934 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:47:50,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 223 [2023-09-01 11:47:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:51,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869145278] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:51,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:47:51,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 9] total 26 [2023-09-01 11:47:51,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345632783] [2023-09-01 11:47:51,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:51,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:47:51,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:51,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:47:51,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-09-01 11:47:51,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 483 [2023-09-01 11:47:51,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 185 transitions, 2678 flow. Second operand has 9 states, 9 states have (on average 173.11111111111111) internal successors, (1558), 9 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:51,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:51,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 483 [2023-09-01 11:47:51,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:52,783 INFO L130 PetriNetUnfolder]: 2130/3900 cut-off events. [2023-09-01 11:47:52,784 INFO L131 PetriNetUnfolder]: For 39081/39081 co-relation queries the response was YES. [2023-09-01 11:47:52,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24739 conditions, 3900 events. 2130/3900 cut-off events. For 39081/39081 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25434 event pairs, 446 based on Foata normal form. 6/3906 useless extension candidates. Maximal degree in co-relation 24662. Up to 2077 conditions per place. [2023-09-01 11:47:52,811 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 123 selfloop transitions, 127 changer transitions 4/254 dead transitions. [2023-09-01 11:47:52,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 254 transitions, 3891 flow [2023-09-01 11:47:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:47:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:47:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2133 transitions. [2023-09-01 11:47:52,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36801242236024845 [2023-09-01 11:47:52,815 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2133 transitions. [2023-09-01 11:47:52,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2133 transitions. [2023-09-01 11:47:52,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:52,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2133 transitions. [2023-09-01 11:47:52,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 177.75) internal successors, (2133), 12 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,823 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,823 INFO L175 Difference]: Start difference. First operand has 144 places, 185 transitions, 2678 flow. Second operand 12 states and 2133 transitions. [2023-09-01 11:47:52,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 254 transitions, 3891 flow [2023-09-01 11:47:52,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 254 transitions, 3741 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-09-01 11:47:52,997 INFO L231 Difference]: Finished difference. Result has 153 places, 225 transitions, 3596 flow [2023-09-01 11:47:52,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3596, PETRI_PLACES=153, PETRI_TRANSITIONS=225} [2023-09-01 11:47:52,997 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 128 predicate places. [2023-09-01 11:47:52,997 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 225 transitions, 3596 flow [2023-09-01 11:47:52,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 173.11111111111111) internal successors, (1558), 9 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:52,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:53,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-09-01 11:47:53,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:53,203 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:53,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:53,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1568119743, now seen corresponding path program 13 times [2023-09-01 11:47:53,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:53,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505891359] [2023-09-01 11:47:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:53,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:53,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:53,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505891359] [2023-09-01 11:47:53,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505891359] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:53,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138545562] [2023-09-01 11:47:53,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:47:53,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:53,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:53,603 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:53,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 11:47:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:53,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 11:47:53,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:53,781 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 [2023-09-01 11:47:53,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:47:53,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:47:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:53,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:54,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:54,328 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 48 treesize of output 37 [2023-09-01 11:47:54,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:54,343 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 294 treesize of output 274 [2023-09-01 11:47:54,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:54,358 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 262 treesize of output 239 [2023-09-01 11:47:54,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:54,373 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 230 treesize of output 223 [2023-09-01 11:47:54,526 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:54,526 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 48 treesize of output 37 [2023-09-01 11:47:54,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:54,548 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 1206 treesize of output 1090 [2023-09-01 11:47:54,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:54,592 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 262 treesize of output 239 [2023-09-01 11:47:54,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:47:54,605 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 230 treesize of output 223 [2023-09-01 11:47:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:56,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138545562] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:56,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:56,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2023-09-01 11:47:56,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021371337] [2023-09-01 11:47:56,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:56,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 11:47:56,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:56,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 11:47:56,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=564, Unknown=10, NotChecked=0, Total=702 [2023-09-01 11:47:59,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 483 [2023-09-01 11:47:59,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 225 transitions, 3596 flow. Second operand has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:59,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:59,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 483 [2023-09-01 11:47:59,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:00,471 INFO L130 PetriNetUnfolder]: 2092/3794 cut-off events. [2023-09-01 11:48:00,472 INFO L131 PetriNetUnfolder]: For 45543/45543 co-relation queries the response was YES. [2023-09-01 11:48:00,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26519 conditions, 3794 events. 2092/3794 cut-off events. For 45543/45543 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24530 event pairs, 410 based on Foata normal form. 8/3802 useless extension candidates. Maximal degree in co-relation 26437. Up to 1889 conditions per place. [2023-09-01 11:48:00,497 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 97 selfloop transitions, 156 changer transitions 1/254 dead transitions. [2023-09-01 11:48:00,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 254 transitions, 4231 flow [2023-09-01 11:48:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:48:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:48:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2132 transitions. [2023-09-01 11:48:00,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29427191166321603 [2023-09-01 11:48:00,500 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2132 transitions. [2023-09-01 11:48:00,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2132 transitions. [2023-09-01 11:48:00,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:00,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2132 transitions. [2023-09-01 11:48:00,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 142.13333333333333) internal successors, (2132), 15 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:00,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:00,508 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:00,508 INFO L175 Difference]: Start difference. First operand has 153 places, 225 transitions, 3596 flow. Second operand 15 states and 2132 transitions. [2023-09-01 11:48:00,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 254 transitions, 4231 flow [2023-09-01 11:48:00,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 254 transitions, 4122 flow, removed 53 selfloop flow, removed 2 redundant places. [2023-09-01 11:48:00,780 INFO L231 Difference]: Finished difference. Result has 167 places, 223 transitions, 3770 flow [2023-09-01 11:48:00,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3770, PETRI_PLACES=167, PETRI_TRANSITIONS=223} [2023-09-01 11:48:00,781 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 142 predicate places. [2023-09-01 11:48:00,781 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 223 transitions, 3770 flow [2023-09-01 11:48:00,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 138.55555555555554) internal successors, (3741), 27 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:00,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:00,782 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] [2023-09-01 11:48:00,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-09-01 11:48:00,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:00,987 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:00,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:00,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1588118134, now seen corresponding path program 1 times [2023-09-01 11:48:00,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:00,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889321407] [2023-09-01 11:48:00,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:00,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:48:01,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:01,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889321407] [2023-09-01 11:48:01,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889321407] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:01,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3462746] [2023-09-01 11:48:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:01,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:01,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:01,761 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:48:01,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 11:48:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-09-01 11:48:01,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:01,982 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 [2023-09-01 11:48:02,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:48:02,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:48:02,360 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:48:02,361 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 39 treesize of output 19 [2023-09-01 11:48:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:48:02,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:48:09,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:09,341 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 47 treesize of output 36 [2023-09-01 11:48:09,350 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:48:09,351 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 278 treesize of output 253 [2023-09-01 11:48:09,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:09,360 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 246 treesize of output 222 [2023-09-01 11:48:09,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:09,369 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 214 treesize of output 206 [2023-09-01 11:48:09,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:09,786 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 47 treesize of output 36 [2023-09-01 11:48:09,796 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:48:09,797 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 566 treesize of output 509 [2023-09-01 11:48:09,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:09,817 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 246 treesize of output 238 [2023-09-01 11:48:09,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:09,829 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 230 treesize of output 206 [2023-09-01 11:48:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:48:10,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3462746] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:48:10,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:48:10,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2023-09-01 11:48:10,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472309998] [2023-09-01 11:48:10,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:48:10,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 11:48:10,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:10,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 11:48:10,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1076, Unknown=15, NotChecked=0, Total=1332 [2023-09-01 11:48:12,212 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] [2023-09-01 11:48:14,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:16,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:18,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:20,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:22,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:24,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:27,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:29,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:31,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:33,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:35,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:37,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:39,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:40,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:42,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:44,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:46,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:48,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:50,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:52,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:54,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:56,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:48:58,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:00,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:02,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:04,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:06,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:08,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:10,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:12,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:14,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:16,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:18,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:20,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:22,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:24,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:26,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:28,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:30,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:32,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:34,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:36,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:38,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:40,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:42,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:45,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:47,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:49,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:51,038 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] [2023-09-01 11:49:51,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-09-01 11:49:51,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 223 transitions, 3770 flow. Second operand has 37 states, 37 states have (on average 129.56756756756758) internal successors, (4794), 37 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:51,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:51,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-09-01 11:49:51,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:53,612 INFO L130 PetriNetUnfolder]: 2252/4152 cut-off events. [2023-09-01 11:49:53,612 INFO L131 PetriNetUnfolder]: For 53684/53684 co-relation queries the response was YES. [2023-09-01 11:49:53,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29631 conditions, 4152 events. 2252/4152 cut-off events. For 53684/53684 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 27813 event pairs, 388 based on Foata normal form. 10/4162 useless extension candidates. Maximal degree in co-relation 29544. Up to 1461 conditions per place. [2023-09-01 11:49:53,639 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 279 selfloop transitions, 125 changer transitions 11/415 dead transitions. [2023-09-01 11:49:53,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 415 transitions, 6489 flow [2023-09-01 11:49:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 11:49:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 11:49:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3247 transitions. [2023-09-01 11:49:53,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2801069703243616 [2023-09-01 11:49:53,643 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3247 transitions. [2023-09-01 11:49:53,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3247 transitions. [2023-09-01 11:49:53,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:53,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3247 transitions. [2023-09-01 11:49:53,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 135.29166666666666) internal successors, (3247), 24 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:53,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 483.0) internal successors, (12075), 25 states have internal predecessors, (12075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:53,655 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 483.0) internal successors, (12075), 25 states have internal predecessors, (12075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:53,655 INFO L175 Difference]: Start difference. First operand has 167 places, 223 transitions, 3770 flow. Second operand 24 states and 3247 transitions. [2023-09-01 11:49:53,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 415 transitions, 6489 flow [2023-09-01 11:49:53,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 415 transitions, 6381 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-09-01 11:49:53,897 INFO L231 Difference]: Finished difference. Result has 189 places, 271 transitions, 4561 flow [2023-09-01 11:49:53,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4561, PETRI_PLACES=189, PETRI_TRANSITIONS=271} [2023-09-01 11:49:53,898 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 164 predicate places. [2023-09-01 11:49:53,898 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 271 transitions, 4561 flow [2023-09-01 11:49:53,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 129.56756756756758) internal successors, (4794), 37 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:53,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:53,899 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] [2023-09-01 11:49:53,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 11:49:54,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:54,099 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:54,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:54,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1970275389, now seen corresponding path program 1 times [2023-09-01 11:49:54,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:54,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961900388] [2023-09-01 11:49:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:54,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:49:54,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961900388] [2023-09-01 11:49:54,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961900388] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:49:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056171342] [2023-09-01 11:49:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:54,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:54,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:49:54,381 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:49:54,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 11:49:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:54,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 11:49:54,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:49:54,735 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:49:54,735 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 130 treesize of output 111 [2023-09-01 11:49:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:49:54,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:49:54,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:49:54,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-09-01 11:49:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:49:55,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056171342] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:49:55,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:49:55,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-09-01 11:49:55,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656039339] [2023-09-01 11:49:55,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:49:55,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 11:49:55,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 11:49:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2023-09-01 11:49:56,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-09-01 11:49:56,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 271 transitions, 4561 flow. Second operand has 27 states, 27 states have (on average 187.22222222222223) internal successors, (5055), 27 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:56,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:56,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-09-01 11:49:56,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:58,521 INFO L130 PetriNetUnfolder]: 5541/10406 cut-off events. [2023-09-01 11:49:58,521 INFO L131 PetriNetUnfolder]: For 147387/147387 co-relation queries the response was YES. [2023-09-01 11:49:58,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75845 conditions, 10406 events. 5541/10406 cut-off events. For 147387/147387 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 84580 event pairs, 815 based on Foata normal form. 314/10720 useless extension candidates. Maximal degree in co-relation 75407. Up to 4092 conditions per place. [2023-09-01 11:49:58,601 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 696 selfloop transitions, 229 changer transitions 21/946 dead transitions. [2023-09-01 11:49:58,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 946 transitions, 17285 flow [2023-09-01 11:49:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:49:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:49:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3669 transitions. [2023-09-01 11:49:58,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998038574697614 [2023-09-01 11:49:58,607 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3669 transitions. [2023-09-01 11:49:58,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3669 transitions. [2023-09-01 11:49:58,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:58,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3669 transitions. [2023-09-01 11:49:58,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 193.10526315789474) internal successors, (3669), 19 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:58,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:58,618 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:58,618 INFO L175 Difference]: Start difference. First operand has 189 places, 271 transitions, 4561 flow. Second operand 19 states and 3669 transitions. [2023-09-01 11:49:58,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 946 transitions, 17285 flow [2023-09-01 11:49:59,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 946 transitions, 16866 flow, removed 88 selfloop flow, removed 9 redundant places. [2023-09-01 11:49:59,844 INFO L231 Difference]: Finished difference. Result has 204 places, 492 transitions, 9058 flow [2023-09-01 11:49:59,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=4424, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9058, PETRI_PLACES=204, PETRI_TRANSITIONS=492} [2023-09-01 11:49:59,845 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 179 predicate places. [2023-09-01 11:49:59,845 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 492 transitions, 9058 flow [2023-09-01 11:49:59,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 187.22222222222223) internal successors, (5055), 27 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:59,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:59,846 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] [2023-09-01 11:49:59,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:00,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:00,049 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:00,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1997958036, now seen corresponding path program 2 times [2023-09-01 11:50:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:00,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271284898] [2023-09-01 11:50:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:50:00,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:00,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271284898] [2023-09-01 11:50:00,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271284898] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:00,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104569397] [2023-09-01 11:50:00,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:50:00,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:00,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:00,623 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:50:00,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 11:50:00,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:50:00,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:00,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 11:50:00,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:01,195 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:50:01,196 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 39 treesize of output 19 [2023-09-01 11:50:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:50:01,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:50:01,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104569397] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:50:01,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:50:01,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-09-01 11:50:01,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827593045] [2023-09-01 11:50:01,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:01,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:50:01,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:01,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:50:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:50:01,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-09-01 11:50:01,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 492 transitions, 9058 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:01,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:01,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-09-01 11:50:01,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:04,090 INFO L130 PetriNetUnfolder]: 5556/10466 cut-off events. [2023-09-01 11:50:04,090 INFO L131 PetriNetUnfolder]: For 171064/171064 co-relation queries the response was YES. [2023-09-01 11:50:04,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80752 conditions, 10466 events. 5556/10466 cut-off events. For 171064/171064 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 85792 event pairs, 2130 based on Foata normal form. 15/10481 useless extension candidates. Maximal degree in co-relation 78879. Up to 7629 conditions per place. [2023-09-01 11:50:04,169 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 454 selfloop transitions, 89 changer transitions 14/557 dead transitions. [2023-09-01 11:50:04,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 557 transitions, 11037 flow [2023-09-01 11:50:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:50:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:50:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2038 transitions. [2023-09-01 11:50:04,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38358742706568794 [2023-09-01 11:50:04,171 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2038 transitions. [2023-09-01 11:50:04,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2038 transitions. [2023-09-01 11:50:04,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:04,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2038 transitions. [2023-09-01 11:50:04,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.27272727272728) internal successors, (2038), 11 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:04,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:04,175 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:04,175 INFO L175 Difference]: Start difference. First operand has 204 places, 492 transitions, 9058 flow. Second operand 11 states and 2038 transitions. [2023-09-01 11:50:04,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 557 transitions, 11037 flow [2023-09-01 11:50:05,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 557 transitions, 10887 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-09-01 11:50:05,839 INFO L231 Difference]: Finished difference. Result has 213 places, 500 transitions, 9337 flow [2023-09-01 11:50:05,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=8928, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9337, PETRI_PLACES=213, PETRI_TRANSITIONS=500} [2023-09-01 11:50:05,840 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2023-09-01 11:50:05,840 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 500 transitions, 9337 flow [2023-09-01 11:50:05,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:05,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:05,840 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] [2023-09-01 11:50:05,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:06,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:06,041 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:06,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:06,041 INFO L85 PathProgramCache]: Analyzing trace with hash 773329696, now seen corresponding path program 3 times [2023-09-01 11:50:06,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:06,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571106207] [2023-09-01 11:50:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:06,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:50:06,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:06,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571106207] [2023-09-01 11:50:06,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571106207] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:06,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495951906] [2023-09-01 11:50:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:50:06,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:06,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:06,595 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:50:06,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 11:50:06,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 11:50:06,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:06,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 11:50:06,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:07,201 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:50:07,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-09-01 11:50:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:50:07,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:50:07,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495951906] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:50:07,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:50:07,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-09-01 11:50:07,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476312127] [2023-09-01 11:50:07,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:07,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:50:07,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:07,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:50:07,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:50:07,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-09-01 11:50:07,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 500 transitions, 9337 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:07,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:07,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-09-01 11:50:07,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:10,013 INFO L130 PetriNetUnfolder]: 5556/10476 cut-off events. [2023-09-01 11:50:10,013 INFO L131 PetriNetUnfolder]: For 177652/177652 co-relation queries the response was YES. [2023-09-01 11:50:10,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81812 conditions, 10476 events. 5556/10476 cut-off events. For 177652/177652 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 85763 event pairs, 2134 based on Foata normal form. 25/10501 useless extension candidates. Maximal degree in co-relation 81181. Up to 7629 conditions per place. [2023-09-01 11:50:10,112 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 452 selfloop transitions, 81 changer transitions 19/552 dead transitions. [2023-09-01 11:50:10,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 552 transitions, 11057 flow [2023-09-01 11:50:10,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:50:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:50:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2039 transitions. [2023-09-01 11:50:10,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38377564464520986 [2023-09-01 11:50:10,115 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2039 transitions. [2023-09-01 11:50:10,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2039 transitions. [2023-09-01 11:50:10,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:10,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2039 transitions. [2023-09-01 11:50:10,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.36363636363637) internal successors, (2039), 11 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:10,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:10,121 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:10,121 INFO L175 Difference]: Start difference. First operand has 213 places, 500 transitions, 9337 flow. Second operand 11 states and 2039 transitions. [2023-09-01 11:50:10,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 552 transitions, 11057 flow [2023-09-01 11:50:11,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 552 transitions, 10869 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-09-01 11:50:11,808 INFO L231 Difference]: Finished difference. Result has 216 places, 492 transitions, 9185 flow [2023-09-01 11:50:11,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=9153, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9185, PETRI_PLACES=216, PETRI_TRANSITIONS=492} [2023-09-01 11:50:11,809 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 191 predicate places. [2023-09-01 11:50:11,809 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 492 transitions, 9185 flow [2023-09-01 11:50:11,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:11,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:11,810 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] [2023-09-01 11:50:11,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:12,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 11:50:12,011 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:12,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash 176099406, now seen corresponding path program 4 times [2023-09-01 11:50:12,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:12,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164255862] [2023-09-01 11:50:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:12,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:50:12,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:12,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164255862] [2023-09-01 11:50:12,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164255862] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:12,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413641778] [2023-09-01 11:50:12,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:50:12,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:12,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:12,553 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:50:12,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 11:50:12,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:50:12,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:12,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjunts are in the unsatisfiable core [2023-09-01 11:50:12,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:12,719 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 [2023-09-01 11:50:12,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:50:12,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:50:12,910 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:50:12,910 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 52 treesize of output 24 [2023-09-01 11:50:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:50:12,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:50:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:50:13,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413641778] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:13,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:50:13,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 11] total 23 [2023-09-01 11:50:13,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004975491] [2023-09-01 11:50:13,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:13,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 11:50:13,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:13,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 11:50:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:50:14,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 483 [2023-09-01 11:50:14,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 492 transitions, 9185 flow. Second operand has 8 states, 8 states have (on average 186.5) internal successors, (1492), 8 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:14,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:14,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 483 [2023-09-01 11:50:14,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:17,599 INFO L130 PetriNetUnfolder]: 6111/11546 cut-off events. [2023-09-01 11:50:17,599 INFO L131 PetriNetUnfolder]: For 203729/203729 co-relation queries the response was YES. [2023-09-01 11:50:17,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92624 conditions, 11546 events. 6111/11546 cut-off events. For 203729/203729 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 96230 event pairs, 2380 based on Foata normal form. 5/11551 useless extension candidates. Maximal degree in co-relation 91902. Up to 9866 conditions per place. [2023-09-01 11:50:17,857 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 566 selfloop transitions, 54 changer transitions 8/628 dead transitions. [2023-09-01 11:50:17,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 628 transitions, 13070 flow [2023-09-01 11:50:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:50:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:50:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1538 transitions. [2023-09-01 11:50:17,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39803312629399584 [2023-09-01 11:50:17,859 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1538 transitions. [2023-09-01 11:50:17,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1538 transitions. [2023-09-01 11:50:17,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:17,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1538 transitions. [2023-09-01 11:50:17,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 192.25) internal successors, (1538), 8 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:17,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:17,863 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:17,863 INFO L175 Difference]: Start difference. First operand has 216 places, 492 transitions, 9185 flow. Second operand 8 states and 1538 transitions. [2023-09-01 11:50:17,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 628 transitions, 13070 flow [2023-09-01 11:50:19,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 628 transitions, 12734 flow, removed 39 selfloop flow, removed 10 redundant places. [2023-09-01 11:50:19,853 INFO L231 Difference]: Finished difference. Result has 215 places, 528 transitions, 10116 flow [2023-09-01 11:50:19,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=9005, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10116, PETRI_PLACES=215, PETRI_TRANSITIONS=528} [2023-09-01 11:50:19,854 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 190 predicate places. [2023-09-01 11:50:19,854 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 528 transitions, 10116 flow [2023-09-01 11:50:19,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.5) internal successors, (1492), 8 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:19,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:19,854 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] [2023-09-01 11:50:19,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:20,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-09-01 11:50:20,056 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:20,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:20,057 INFO L85 PathProgramCache]: Analyzing trace with hash 706975026, now seen corresponding path program 5 times [2023-09-01 11:50:20,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:20,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568059332] [2023-09-01 11:50:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:20,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:50:20,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:20,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568059332] [2023-09-01 11:50:20,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568059332] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:20,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084893509] [2023-09-01 11:50:20,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:50:20,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:20,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:20,576 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:50:20,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 11:50:20,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:50:20,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-09-01 11:50:20,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:20,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 11:50:20,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:50:20,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:50:21,122 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:50:21,122 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 39 treesize of output 19 [2023-09-01 11:50:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:50:21,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:50:27,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:27,991 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 47 treesize of output 36 [2023-09-01 11:50:28,002 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:50:28,002 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 278 treesize of output 253 [2023-09-01 11:50:28,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:28,012 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 246 treesize of output 222 [2023-09-01 11:50:28,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:28,023 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 214 treesize of output 206 [2023-09-01 11:50:28,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:28,286 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 47 treesize of output 36 [2023-09-01 11:50:28,296 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:50:28,297 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 566 treesize of output 509 [2023-09-01 11:50:28,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:28,318 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 246 treesize of output 238 [2023-09-01 11:50:28,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:28,329 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 230 treesize of output 206 [2023-09-01 11:50:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:50:28,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084893509] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:50:28,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:50:28,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 33 [2023-09-01 11:50:28,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781069931] [2023-09-01 11:50:28,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:50:28,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 11:50:28,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:28,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 11:50:28,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=969, Unknown=13, NotChecked=0, Total=1190 [2023-09-01 11:50:30,700 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] [2023-09-01 11:50:32,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:34,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:36,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:38,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:40,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:42,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:44,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:46,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:48,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:50,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:52,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:54,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:56,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:58,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:00,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:02,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:05,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:07,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:09,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:11,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:13,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:15,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:17,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:19,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:21,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:23,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:25,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:27,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:29,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:31,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:33,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:35,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:37,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:39,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:41,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:43,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:46,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:48,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:50,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:52,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:54,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:56,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:51:58,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:00,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:02,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:04,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:06,213 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] [2023-09-01 11:52:06,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-09-01 11:52:06,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 528 transitions, 10116 flow. Second operand has 35 states, 35 states have (on average 129.5142857142857) internal successors, (4533), 35 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:06,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:52:06,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-09-01 11:52:06,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:52:10,082 INFO L130 PetriNetUnfolder]: 6007/11563 cut-off events. [2023-09-01 11:52:10,082 INFO L131 PetriNetUnfolder]: For 199959/199959 co-relation queries the response was YES. [2023-09-01 11:52:10,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90881 conditions, 11563 events. 6007/11563 cut-off events. For 199959/199959 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 98595 event pairs, 1584 based on Foata normal form. 130/11693 useless extension candidates. Maximal degree in co-relation 90156. Up to 5748 conditions per place. [2023-09-01 11:52:10,188 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 393 selfloop transitions, 240 changer transitions 32/665 dead transitions. [2023-09-01 11:52:10,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 665 transitions, 13009 flow [2023-09-01 11:52:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:52:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:52:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2963 transitions. [2023-09-01 11:52:10,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27884434406173536 [2023-09-01 11:52:10,191 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2963 transitions. [2023-09-01 11:52:10,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2963 transitions. [2023-09-01 11:52:10,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:52:10,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2963 transitions. [2023-09-01 11:52:10,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 134.6818181818182) internal successors, (2963), 22 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:10,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 483.0) internal successors, (11109), 23 states have internal predecessors, (11109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:10,201 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 483.0) internal successors, (11109), 23 states have internal predecessors, (11109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:10,201 INFO L175 Difference]: Start difference. First operand has 215 places, 528 transitions, 10116 flow. Second operand 22 states and 2963 transitions. [2023-09-01 11:52:10,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 665 transitions, 13009 flow [2023-09-01 11:52:12,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 665 transitions, 12948 flow, removed 21 selfloop flow, removed 2 redundant places. [2023-09-01 11:52:12,463 INFO L231 Difference]: Finished difference. Result has 240 places, 557 transitions, 11199 flow [2023-09-01 11:52:12,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=9902, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11199, PETRI_PLACES=240, PETRI_TRANSITIONS=557} [2023-09-01 11:52:12,464 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 215 predicate places. [2023-09-01 11:52:12,464 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 557 transitions, 11199 flow [2023-09-01 11:52:12,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 129.5142857142857) internal successors, (4533), 35 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:12,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:52:12,465 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] [2023-09-01 11:52:12,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 11:52:12,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 11:52:12,665 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:52:12,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:52:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1885109360, now seen corresponding path program 6 times [2023-09-01 11:52:12,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:52:12,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377077244] [2023-09-01 11:52:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:52:12,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:52:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:52:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:52:13,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:52:13,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377077244] [2023-09-01 11:52:13,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377077244] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:52:13,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273684254] [2023-09-01 11:52:13,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:52:13,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:52:13,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:52:13,150 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:52:13,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 11:52:13,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 11:52:13,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:52:13,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 11:52:13,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:52:13,575 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:52:13,575 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 39 treesize of output 19 [2023-09-01 11:52:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:52:13,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:52:13,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273684254] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:52:13,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:52:13,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-09-01 11:52:13,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077127372] [2023-09-01 11:52:13,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:52:13,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:52:13,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:52:13,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:52:13,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:52:14,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 483 [2023-09-01 11:52:14,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 557 transitions, 11199 flow. Second operand has 12 states, 12 states have (on average 178.66666666666666) internal successors, (2144), 12 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:14,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:52:14,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 483 [2023-09-01 11:52:14,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:52:17,094 INFO L130 PetriNetUnfolder]: 5962/11478 cut-off events. [2023-09-01 11:52:17,094 INFO L131 PetriNetUnfolder]: For 214391/214391 co-relation queries the response was YES. [2023-09-01 11:52:17,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93355 conditions, 11478 events. 5962/11478 cut-off events. For 214391/214391 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 97922 event pairs, 2155 based on Foata normal form. 10/11488 useless extension candidates. Maximal degree in co-relation 92788. Up to 7709 conditions per place. [2023-09-01 11:52:17,197 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 522 selfloop transitions, 68 changer transitions 28/618 dead transitions. [2023-09-01 11:52:17,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 618 transitions, 13102 flow [2023-09-01 11:52:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:52:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:52:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2386 transitions. [2023-09-01 11:52:17,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3799968147794235 [2023-09-01 11:52:17,200 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2386 transitions. [2023-09-01 11:52:17,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2386 transitions. [2023-09-01 11:52:17,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:52:17,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2386 transitions. [2023-09-01 11:52:17,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 183.53846153846155) internal successors, (2386), 13 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:17,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:17,204 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:17,204 INFO L175 Difference]: Start difference. First operand has 240 places, 557 transitions, 11199 flow. Second operand 13 states and 2386 transitions. [2023-09-01 11:52:17,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 618 transitions, 13102 flow [2023-09-01 11:52:19,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 618 transitions, 12536 flow, removed 114 selfloop flow, removed 14 redundant places. [2023-09-01 11:52:19,334 INFO L231 Difference]: Finished difference. Result has 239 places, 547 transitions, 10575 flow [2023-09-01 11:52:19,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10687, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10575, PETRI_PLACES=239, PETRI_TRANSITIONS=547} [2023-09-01 11:52:19,335 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 214 predicate places. [2023-09-01 11:52:19,335 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 547 transitions, 10575 flow [2023-09-01 11:52:19,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 178.66666666666666) internal successors, (2144), 12 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:19,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:52:19,336 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] [2023-09-01 11:52:19,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 11:52:19,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:52:19,536 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:52:19,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:52:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1136977276, now seen corresponding path program 7 times [2023-09-01 11:52:19,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:52:19,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861881310] [2023-09-01 11:52:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:52:19,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:52:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:52:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:52:20,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:52:20,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861881310] [2023-09-01 11:52:20,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861881310] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:52:20,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106003521] [2023-09-01 11:52:20,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:52:20,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:52:20,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:52:20,048 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:52:20,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 11:52:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:52:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-09-01 11:52:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:52:20,244 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 [2023-09-01 11:52:20,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:52:20,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:52:20,611 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:52:20,612 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 39 treesize of output 19 [2023-09-01 11:52:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:52:20,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:52:27,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:52:27,422 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 47 treesize of output 36 [2023-09-01 11:52:27,432 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:52:27,432 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 278 treesize of output 253 [2023-09-01 11:52:27,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:52:27,457 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 246 treesize of output 222 [2023-09-01 11:52:27,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:52:27,470 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 214 treesize of output 206 [2023-09-01 11:52:27,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:52:27,719 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 47 treesize of output 36 [2023-09-01 11:52:27,730 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:52:27,730 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 278 treesize of output 253 [2023-09-01 11:52:27,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:52:27,747 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 246 treesize of output 222 [2023-09-01 11:52:27,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:52:27,757 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 214 treesize of output 206 [2023-09-01 11:52:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:52:28,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106003521] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:52:28,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:52:28,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 34 [2023-09-01 11:52:28,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407782859] [2023-09-01 11:52:28,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:52:28,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 11:52:28,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:52:28,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 11:52:28,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1077, Unknown=14, NotChecked=0, Total=1260 [2023-09-01 11:52:30,290 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] [2023-09-01 11:52:32,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:34,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:36,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:38,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:40,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:42,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:44,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:46,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:48,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:50,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:52,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:54,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:56,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:58,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:00,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:02,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:04,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:06,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:08,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:10,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:12,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:14,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:16,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:18,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:20,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:22,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:24,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:26,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:28,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:30,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:32,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:34,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:36,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:39,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:41,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:43,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:45,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:47,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:49,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:51,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:53,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:55,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:57,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:59,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:54:01,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:54:03,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:54:03,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-09-01 11:54:03,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 547 transitions, 10575 flow. Second operand has 36 states, 36 states have (on average 129.58333333333334) internal successors, (4665), 36 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:03,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:03,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-09-01 11:54:03,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:07,788 INFO L130 PetriNetUnfolder]: 6314/12182 cut-off events. [2023-09-01 11:54:07,789 INFO L131 PetriNetUnfolder]: For 206362/206362 co-relation queries the response was YES. [2023-09-01 11:54:07,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97412 conditions, 12182 events. 6314/12182 cut-off events. For 206362/206362 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 105232 event pairs, 1949 based on Foata normal form. 30/12212 useless extension candidates. Maximal degree in co-relation 96625. Up to 7037 conditions per place. [2023-09-01 11:54:07,906 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 457 selfloop transitions, 146 changer transitions 64/667 dead transitions. [2023-09-01 11:54:07,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 667 transitions, 13351 flow [2023-09-01 11:54:07,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 11:54:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 11:54:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3474 transitions. [2023-09-01 11:54:07,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2766364070711897 [2023-09-01 11:54:07,910 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3474 transitions. [2023-09-01 11:54:07,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3474 transitions. [2023-09-01 11:54:07,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:07,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3474 transitions. [2023-09-01 11:54:07,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 133.6153846153846) internal successors, (3474), 26 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:07,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 483.0) internal successors, (13041), 27 states have internal predecessors, (13041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:07,919 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 483.0) internal successors, (13041), 27 states have internal predecessors, (13041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:07,919 INFO L175 Difference]: Start difference. First operand has 239 places, 547 transitions, 10575 flow. Second operand 26 states and 3474 transitions. [2023-09-01 11:54:07,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 667 transitions, 13351 flow [2023-09-01 11:54:10,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 667 transitions, 13127 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-09-01 11:54:10,198 INFO L231 Difference]: Finished difference. Result has 264 places, 533 transitions, 10593 flow [2023-09-01 11:54:10,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10383, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10593, PETRI_PLACES=264, PETRI_TRANSITIONS=533} [2023-09-01 11:54:10,199 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 239 predicate places. [2023-09-01 11:54:10,199 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 533 transitions, 10593 flow [2023-09-01 11:54:10,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 129.58333333333334) internal successors, (4665), 36 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:10,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:10,200 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] [2023-09-01 11:54:10,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:10,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 11:54:10,406 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:10,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:10,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1536392364, now seen corresponding path program 8 times [2023-09-01 11:54:10,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:10,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285651556] [2023-09-01 11:54:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:10,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:10,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:10,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285651556] [2023-09-01 11:54:10,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285651556] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:10,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636202623] [2023-09-01 11:54:10,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:54:10,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:10,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:10,954 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:10,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 11:54:11,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:54:11,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:11,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 11:54:11,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:11,409 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:54:11,409 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 39 treesize of output 19 [2023-09-01 11:54:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:54:11,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:54:11,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636202623] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:54:11,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:54:11,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-09-01 11:54:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655724483] [2023-09-01 11:54:11,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:54:11,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:54:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:54:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:54:11,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-09-01 11:54:11,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 533 transitions, 10593 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:11,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:11,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-09-01 11:54:11,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:14,625 INFO L130 PetriNetUnfolder]: 6074/11662 cut-off events. [2023-09-01 11:54:14,625 INFO L131 PetriNetUnfolder]: For 250409/250409 co-relation queries the response was YES. [2023-09-01 11:54:14,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98583 conditions, 11662 events. 6074/11662 cut-off events. For 250409/250409 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 99818 event pairs, 2270 based on Foata normal form. 10/11672 useless extension candidates. Maximal degree in co-relation 97715. Up to 7757 conditions per place. [2023-09-01 11:54:14,742 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 473 selfloop transitions, 73 changer transitions 17/563 dead transitions. [2023-09-01 11:54:14,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 563 transitions, 11971 flow [2023-09-01 11:54:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:54:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:54:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1847 transitions. [2023-09-01 11:54:14,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824016563146998 [2023-09-01 11:54:14,745 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1847 transitions. [2023-09-01 11:54:14,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1847 transitions. [2023-09-01 11:54:14,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:14,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1847 transitions. [2023-09-01 11:54:14,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.7) internal successors, (1847), 10 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:14,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:14,750 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:14,750 INFO L175 Difference]: Start difference. First operand has 264 places, 533 transitions, 10593 flow. Second operand 10 states and 1847 transitions. [2023-09-01 11:54:14,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 563 transitions, 11971 flow [2023-09-01 11:54:17,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 563 transitions, 11605 flow, removed 82 selfloop flow, removed 15 redundant places. [2023-09-01 11:54:17,317 INFO L231 Difference]: Finished difference. Result has 253 places, 531 transitions, 10354 flow [2023-09-01 11:54:17,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10243, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10354, PETRI_PLACES=253, PETRI_TRANSITIONS=531} [2023-09-01 11:54:17,318 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 228 predicate places. [2023-09-01 11:54:17,318 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 531 transitions, 10354 flow [2023-09-01 11:54:17,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:17,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:17,319 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] [2023-09-01 11:54:17,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:17,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 11:54:17,521 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:17,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash 86442636, now seen corresponding path program 9 times [2023-09-01 11:54:17,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:17,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167036686] [2023-09-01 11:54:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:17,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:17,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:17,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167036686] [2023-09-01 11:54:17,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167036686] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:17,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965770502] [2023-09-01 11:54:17,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:54:17,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:17,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:17,975 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:17,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 11:54:18,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 11:54:18,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:18,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 11:54:18,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:18,396 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:54:18,397 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 39 treesize of output 19 [2023-09-01 11:54:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:54:18,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:54:18,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965770502] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:54:18,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:54:18,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-09-01 11:54:18,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624975370] [2023-09-01 11:54:18,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:54:18,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:54:18,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:18,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:54:18,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:54:18,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-09-01 11:54:18,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 531 transitions, 10354 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:18,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:18,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-09-01 11:54:18,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:21,784 INFO L130 PetriNetUnfolder]: 5984/11477 cut-off events. [2023-09-01 11:54:21,784 INFO L131 PetriNetUnfolder]: For 241783/241783 co-relation queries the response was YES. [2023-09-01 11:54:21,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95276 conditions, 11477 events. 5984/11477 cut-off events. For 241783/241783 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 97121 event pairs, 1782 based on Foata normal form. 35/11512 useless extension candidates. Maximal degree in co-relation 94816. Up to 7692 conditions per place. [2023-09-01 11:54:21,946 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 322 selfloop transitions, 229 changer transitions 12/563 dead transitions. [2023-09-01 11:54:21,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 563 transitions, 11703 flow [2023-09-01 11:54:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:54:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:54:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2026 transitions. [2023-09-01 11:54:21,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38132881611142483 [2023-09-01 11:54:21,950 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2026 transitions. [2023-09-01 11:54:21,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2026 transitions. [2023-09-01 11:54:21,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:21,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2026 transitions. [2023-09-01 11:54:21,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 184.1818181818182) internal successors, (2026), 11 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:21,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:21,955 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:21,955 INFO L175 Difference]: Start difference. First operand has 253 places, 531 transitions, 10354 flow. Second operand 11 states and 2026 transitions. [2023-09-01 11:54:21,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 563 transitions, 11703 flow [2023-09-01 11:54:24,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 563 transitions, 11539 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-09-01 11:54:24,245 INFO L231 Difference]: Finished difference. Result has 252 places, 530 transitions, 10659 flow [2023-09-01 11:54:24,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10179, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10659, PETRI_PLACES=252, PETRI_TRANSITIONS=530} [2023-09-01 11:54:24,246 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 227 predicate places. [2023-09-01 11:54:24,246 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 530 transitions, 10659 flow [2023-09-01 11:54:24,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:24,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:24,247 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] [2023-09-01 11:54:24,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-09-01 11:54:24,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:24,454 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:24,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2043106630, now seen corresponding path program 10 times [2023-09-01 11:54:24,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:24,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830149904] [2023-09-01 11:54:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:24,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:25,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830149904] [2023-09-01 11:54:25,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830149904] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428293989] [2023-09-01 11:54:25,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:54:25,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:25,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:25,030 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:25,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 11:54:25,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:54:25,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:25,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 50 conjunts are in the unsatisfiable core [2023-09-01 11:54:25,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:25,199 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 [2023-09-01 11:54:25,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:54:25,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:54:25,537 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:54:25,537 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 39 treesize of output 19 [2023-09-01 11:54:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:54:25,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:54:26,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428293989] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:26,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:54:26,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 11] total 30 [2023-09-01 11:54:26,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589409908] [2023-09-01 11:54:26,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:54:26,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 11:54:26,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:26,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 11:54:26,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2023-09-01 11:54:26,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 483 [2023-09-01 11:54:26,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 530 transitions, 10659 flow. Second operand has 8 states, 8 states have (on average 186.5) internal successors, (1492), 8 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:26,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:26,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 483 [2023-09-01 11:54:26,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:30,149 INFO L130 PetriNetUnfolder]: 6211/12217 cut-off events. [2023-09-01 11:54:30,149 INFO L131 PetriNetUnfolder]: For 277530/277530 co-relation queries the response was YES. [2023-09-01 11:54:30,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102996 conditions, 12217 events. 6211/12217 cut-off events. For 277530/277530 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 107244 event pairs, 1568 based on Foata normal form. 5/12222 useless extension candidates. Maximal degree in co-relation 101995. Up to 7182 conditions per place. [2023-09-01 11:54:30,267 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 347 selfloop transitions, 237 changer transitions 51/635 dead transitions. [2023-09-01 11:54:30,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 635 transitions, 13865 flow [2023-09-01 11:54:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:54:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:54:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1924 transitions. [2023-09-01 11:54:30,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39834368530020703 [2023-09-01 11:54:30,270 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1924 transitions. [2023-09-01 11:54:30,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1924 transitions. [2023-09-01 11:54:30,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:30,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1924 transitions. [2023-09-01 11:54:30,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 192.4) internal successors, (1924), 10 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:30,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:30,275 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:30,275 INFO L175 Difference]: Start difference. First operand has 252 places, 530 transitions, 10659 flow. Second operand 10 states and 1924 transitions. [2023-09-01 11:54:30,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 635 transitions, 13865 flow [2023-09-01 11:54:33,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 635 transitions, 13315 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-09-01 11:54:33,182 INFO L231 Difference]: Finished difference. Result has 257 places, 553 transitions, 11282 flow [2023-09-01 11:54:33,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10233, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11282, PETRI_PLACES=257, PETRI_TRANSITIONS=553} [2023-09-01 11:54:33,183 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 232 predicate places. [2023-09-01 11:54:33,183 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 553 transitions, 11282 flow [2023-09-01 11:54:33,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.5) internal successors, (1492), 8 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:33,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:33,183 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] [2023-09-01 11:54:33,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:33,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:33,385 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:33,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash -583152636, now seen corresponding path program 11 times [2023-09-01 11:54:33,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:33,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856368590] [2023-09-01 11:54:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:34,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:34,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856368590] [2023-09-01 11:54:34,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856368590] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:34,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656281507] [2023-09-01 11:54:34,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:54:34,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:34,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:34,005 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:34,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 11:54:34,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:54:34,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:34,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 11:54:34,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:34,242 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 [2023-09-01 11:54:34,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:54:34,322 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 6 treesize of output 5 [2023-09-01 11:54:34,640 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:54:34,644 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:54:34,644 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 39 treesize of output 19 [2023-09-01 11:54:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:34,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:35,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656281507] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:35,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:54:35,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 29 [2023-09-01 11:54:35,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208621067] [2023-09-01 11:54:35,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:54:35,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:54:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:54:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-09-01 11:54:35,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 483 [2023-09-01 11:54:35,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 553 transitions, 11282 flow. Second operand has 11 states, 11 states have (on average 175.8181818181818) internal successors, (1934), 11 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:35,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:35,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 483 [2023-09-01 11:54:35,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:39,365 INFO L130 PetriNetUnfolder]: 5854/11738 cut-off events. [2023-09-01 11:54:39,365 INFO L131 PetriNetUnfolder]: For 262114/262114 co-relation queries the response was YES. [2023-09-01 11:54:39,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98403 conditions, 11738 events. 5854/11738 cut-off events. For 262114/262114 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 104361 event pairs, 1773 based on Foata normal form. 5/11743 useless extension candidates. Maximal degree in co-relation 98189. Up to 7971 conditions per place. [2023-09-01 11:54:39,493 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 331 selfloop transitions, 236 changer transitions 19/586 dead transitions. [2023-09-01 11:54:39,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 586 transitions, 12707 flow [2023-09-01 11:54:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:54:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:54:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1974 transitions. [2023-09-01 11:54:39,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3715415019762846 [2023-09-01 11:54:39,495 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1974 transitions. [2023-09-01 11:54:39,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1974 transitions. [2023-09-01 11:54:39,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:39,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1974 transitions. [2023-09-01 11:54:39,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 179.45454545454547) internal successors, (1974), 11 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:39,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:39,504 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:39,504 INFO L175 Difference]: Start difference. First operand has 257 places, 553 transitions, 11282 flow. Second operand 11 states and 1974 transitions. [2023-09-01 11:54:39,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 586 transitions, 12707 flow [2023-09-01 11:54:42,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 586 transitions, 12649 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-09-01 11:54:42,792 INFO L231 Difference]: Finished difference. Result has 263 places, 545 transitions, 11488 flow [2023-09-01 11:54:42,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11226, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11488, PETRI_PLACES=263, PETRI_TRANSITIONS=545} [2023-09-01 11:54:42,793 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 238 predicate places. [2023-09-01 11:54:42,793 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 545 transitions, 11488 flow [2023-09-01 11:54:42,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 175.8181818181818) internal successors, (1934), 11 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:42,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:42,794 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] [2023-09-01 11:54:42,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-09-01 11:54:43,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:43,005 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:43,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1270141606, now seen corresponding path program 12 times [2023-09-01 11:54:43,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:43,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680169812] [2023-09-01 11:54:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:43,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:43,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:43,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680169812] [2023-09-01 11:54:43,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680169812] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:43,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369868762] [2023-09-01 11:54:43,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:54:43,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:43,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:43,585 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:43,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 11:54:43,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 11:54:43,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 11:54:43,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:44,045 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:54:44,045 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 39 treesize of output 19 [2023-09-01 11:54:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:54:44,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:54:44,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369868762] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:54:44,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:54:44,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2023-09-01 11:54:44,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839949851] [2023-09-01 11:54:44,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:54:44,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:54:44,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:44,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:54:44,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:54:44,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-09-01 11:54:44,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 545 transitions, 11488 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:44,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:44,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-09-01 11:54:44,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:47,552 INFO L130 PetriNetUnfolder]: 5819/11653 cut-off events. [2023-09-01 11:54:47,553 INFO L131 PetriNetUnfolder]: For 266575/266575 co-relation queries the response was YES. [2023-09-01 11:54:47,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98564 conditions, 11653 events. 5819/11653 cut-off events. For 266575/266575 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 103332 event pairs, 1801 based on Foata normal form. 5/11658 useless extension candidates. Maximal degree in co-relation 98172. Up to 7977 conditions per place. [2023-09-01 11:54:47,672 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 326 selfloop transitions, 228 changer transitions 18/572 dead transitions. [2023-09-01 11:54:47,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 572 transitions, 12746 flow [2023-09-01 11:54:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:54:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:54:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2205 transitions. [2023-09-01 11:54:47,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804347826086957 [2023-09-01 11:54:47,674 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2205 transitions. [2023-09-01 11:54:47,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2205 transitions. [2023-09-01 11:54:47,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:47,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2205 transitions. [2023-09-01 11:54:47,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.75) internal successors, (2205), 12 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:47,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:47,681 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:47,681 INFO L175 Difference]: Start difference. First operand has 263 places, 545 transitions, 11488 flow. Second operand 12 states and 2205 transitions. [2023-09-01 11:54:47,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 572 transitions, 12746 flow [2023-09-01 11:54:50,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 572 transitions, 12215 flow, removed 15 selfloop flow, removed 13 redundant places. [2023-09-01 11:54:50,280 INFO L231 Difference]: Finished difference. Result has 257 places, 533 transitions, 11200 flow [2023-09-01 11:54:50,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10961, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11200, PETRI_PLACES=257, PETRI_TRANSITIONS=533} [2023-09-01 11:54:50,281 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 232 predicate places. [2023-09-01 11:54:50,281 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 533 transitions, 11200 flow [2023-09-01 11:54:50,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:50,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:50,282 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] [2023-09-01 11:54:50,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:50,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:50,484 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:50,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash 785848930, now seen corresponding path program 13 times [2023-09-01 11:54:50,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:50,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436920731] [2023-09-01 11:54:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:50,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:51,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:51,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436920731] [2023-09-01 11:54:51,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436920731] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:51,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717255681] [2023-09-01 11:54:51,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:54:51,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:51,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:51,123 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:51,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 11:54:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:51,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2023-09-01 11:54:51,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:51,326 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 [2023-09-01 11:54:51,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:54:51,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:54:51,698 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:54:51,698 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 39 treesize of output 19 [2023-09-01 11:54:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:51,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:54,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:54,716 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 47 treesize of output 36 [2023-09-01 11:54:54,729 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:54:54,730 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 1142 treesize of output 1021 [2023-09-01 11:54:54,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:54,763 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 246 treesize of output 238 [2023-09-01 11:54:54,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:54,781 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 230 treesize of output 206 [2023-09-01 11:54:54,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:54,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-09-01 11:54:54,998 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:54:54,998 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 278 treesize of output 253 [2023-09-01 11:54:55,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:55,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 238 [2023-09-01 11:54:55,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:55,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 206 [2023-09-01 11:54:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:55,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717255681] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:55,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:55,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2023-09-01 11:54:55,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168355699] [2023-09-01 11:54:55,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:55,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 11:54:55,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:55,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 11:54:55,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1145, Unknown=18, NotChecked=0, Total=1406 [2023-09-01 11:54:57,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-09-01 11:54:57,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 533 transitions, 11200 flow. Second operand has 38 states, 38 states have (on average 129.57894736842104) internal successors, (4924), 38 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:57,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:57,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-09-01 11:54:57,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:04,841 INFO L130 PetriNetUnfolder]: 5904/11630 cut-off events. [2023-09-01 11:55:04,842 INFO L131 PetriNetUnfolder]: For 277570/277570 co-relation queries the response was YES. [2023-09-01 11:55:04,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99639 conditions, 11630 events. 5904/11630 cut-off events. For 277570/277570 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 101410 event pairs, 1206 based on Foata normal form. 20/11650 useless extension candidates. Maximal degree in co-relation 99407. Up to 6650 conditions per place. [2023-09-01 11:55:04,973 INFO L137 encePairwiseOnDemand]: 468/483 looper letters, 478 selfloop transitions, 307 changer transitions 59/844 dead transitions. [2023-09-01 11:55:04,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 844 transitions, 17140 flow [2023-09-01 11:55:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 11:55:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 11:55:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6512 transitions. [2023-09-01 11:55:04,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27515105421050406 [2023-09-01 11:55:04,978 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6512 transitions. [2023-09-01 11:55:04,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6512 transitions. [2023-09-01 11:55:04,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:04,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6512 transitions. [2023-09-01 11:55:05,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 132.89795918367346) internal successors, (6512), 49 states have internal predecessors, (6512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:05,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 483.0) internal successors, (24150), 50 states have internal predecessors, (24150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:05,186 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 483.0) internal successors, (24150), 50 states have internal predecessors, (24150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:05,186 INFO L175 Difference]: Start difference. First operand has 257 places, 533 transitions, 11200 flow. Second operand 49 states and 6512 transitions. [2023-09-01 11:55:05,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 844 transitions, 17140 flow [2023-09-01 11:55:07,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 844 transitions, 16193 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-09-01 11:55:07,824 INFO L231 Difference]: Finished difference. Result has 306 places, 569 transitions, 12173 flow [2023-09-01 11:55:07,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=10198, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=12173, PETRI_PLACES=306, PETRI_TRANSITIONS=569} [2023-09-01 11:55:07,825 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 281 predicate places. [2023-09-01 11:55:07,825 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 569 transitions, 12173 flow [2023-09-01 11:55:07,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 129.57894736842104) internal successors, (4924), 38 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:07,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:07,826 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] [2023-09-01 11:55:07,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:08,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-09-01 11:55:08,026 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:08,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:08,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1895045882, now seen corresponding path program 14 times [2023-09-01 11:55:08,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:08,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304146918] [2023-09-01 11:55:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:08,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:55:08,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:08,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304146918] [2023-09-01 11:55:08,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304146918] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:08,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512212445] [2023-09-01 11:55:08,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:55:08,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:08,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:08,549 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:08,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 11:55:08,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:55:08,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:08,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 11:55:08,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:09,078 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:55:09,079 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 39 treesize of output 19 [2023-09-01 11:55:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:55:09,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:55:09,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512212445] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:55:09,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:55:09,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-09-01 11:55:09,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565796418] [2023-09-01 11:55:09,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:55:09,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:55:09,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:09,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:55:09,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:55:09,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-09-01 11:55:09,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 569 transitions, 12173 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:09,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:09,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-09-01 11:55:09,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:12,544 INFO L130 PetriNetUnfolder]: 5837/11448 cut-off events. [2023-09-01 11:55:12,544 INFO L131 PetriNetUnfolder]: For 330553/330553 co-relation queries the response was YES. [2023-09-01 11:55:12,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102415 conditions, 11448 events. 5837/11448 cut-off events. For 330553/330553 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 99516 event pairs, 2046 based on Foata normal form. 5/11453 useless extension candidates. Maximal degree in co-relation 102318. Up to 7869 conditions per place. [2023-09-01 11:55:12,659 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 532 selfloop transitions, 56 changer transitions 25/613 dead transitions. [2023-09-01 11:55:12,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 613 transitions, 13993 flow [2023-09-01 11:55:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:55:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:55:12,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2034 transitions. [2023-09-01 11:55:12,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38283455674760025 [2023-09-01 11:55:12,661 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2034 transitions. [2023-09-01 11:55:12,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2034 transitions. [2023-09-01 11:55:12,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:12,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2034 transitions. [2023-09-01 11:55:12,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 184.9090909090909) internal successors, (2034), 11 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:12,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:12,665 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 483.0) internal successors, (5796), 12 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:12,665 INFO L175 Difference]: Start difference. First operand has 306 places, 569 transitions, 12173 flow. Second operand 11 states and 2034 transitions. [2023-09-01 11:55:12,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 613 transitions, 13993 flow [2023-09-01 11:55:15,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 613 transitions, 13536 flow, removed 196 selfloop flow, removed 19 redundant places. [2023-09-01 11:55:15,455 INFO L231 Difference]: Finished difference. Result has 278 places, 560 transitions, 11681 flow [2023-09-01 11:55:15,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11818, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11681, PETRI_PLACES=278, PETRI_TRANSITIONS=560} [2023-09-01 11:55:15,456 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 253 predicate places. [2023-09-01 11:55:15,456 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 560 transitions, 11681 flow [2023-09-01 11:55:15,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:15,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:15,456 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] [2023-09-01 11:55:15,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-09-01 11:55:15,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:15,657 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:15,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:15,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1442779098, now seen corresponding path program 15 times [2023-09-01 11:55:15,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:15,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901885704] [2023-09-01 11:55:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:15,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:55:16,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:16,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901885704] [2023-09-01 11:55:16,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901885704] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:16,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030435584] [2023-09-01 11:55:16,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:55:16,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:16,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:16,208 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:16,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 11:55:16,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 11:55:16,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:16,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 11:55:16,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:16,667 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:55:16,668 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 39 treesize of output 19 [2023-09-01 11:55:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:55:16,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:55:16,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030435584] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:55:16,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:55:16,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-09-01 11:55:16,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485376712] [2023-09-01 11:55:16,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:55:16,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:55:16,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:16,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:55:16,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:55:17,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 483 [2023-09-01 11:55:17,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 560 transitions, 11681 flow. Second operand has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:17,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:17,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 483 [2023-09-01 11:55:17,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:20,122 INFO L130 PetriNetUnfolder]: 5797/11338 cut-off events. [2023-09-01 11:55:20,122 INFO L131 PetriNetUnfolder]: For 320621/320621 co-relation queries the response was YES. [2023-09-01 11:55:20,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100738 conditions, 11338 events. 5797/11338 cut-off events. For 320621/320621 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 97861 event pairs, 2165 based on Foata normal form. 5/11343 useless extension candidates. Maximal degree in co-relation 100646. Up to 7869 conditions per place. [2023-09-01 11:55:20,230 INFO L137 encePairwiseOnDemand]: 471/483 looper letters, 511 selfloop transitions, 58 changer transitions 19/588 dead transitions. [2023-09-01 11:55:20,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 588 transitions, 13125 flow [2023-09-01 11:55:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:55:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:55:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1844 transitions. [2023-09-01 11:55:20,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38178053830227743 [2023-09-01 11:55:20,233 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1844 transitions. [2023-09-01 11:55:20,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1844 transitions. [2023-09-01 11:55:20,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:20,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1844 transitions. [2023-09-01 11:55:20,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.4) internal successors, (1844), 10 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:20,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:20,236 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:20,236 INFO L175 Difference]: Start difference. First operand has 278 places, 560 transitions, 11681 flow. Second operand 10 states and 1844 transitions. [2023-09-01 11:55:20,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 588 transitions, 13125 flow [2023-09-01 11:55:22,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 588 transitions, 12974 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-09-01 11:55:22,873 INFO L231 Difference]: Finished difference. Result has 271 places, 551 transitions, 11483 flow [2023-09-01 11:55:22,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11532, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11483, PETRI_PLACES=271, PETRI_TRANSITIONS=551} [2023-09-01 11:55:22,874 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 246 predicate places. [2023-09-01 11:55:22,874 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 551 transitions, 11483 flow [2023-09-01 11:55:22,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.66666666666666) internal successors, (2156), 12 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:22,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:22,875 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] [2023-09-01 11:55:22,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:23,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:23,075 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:23,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1271388532, now seen corresponding path program 16 times [2023-09-01 11:55:23,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:23,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296227931] [2023-09-01 11:55:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:23,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:55:23,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:23,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296227931] [2023-09-01 11:55:23,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296227931] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:23,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100005072] [2023-09-01 11:55:23,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:55:23,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:23,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:23,674 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:23,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 11:55:23,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:55:23,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:23,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:55:23,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:24,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:55:24,150 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 14 treesize of output 16 [2023-09-01 11:55:24,261 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:55:24,262 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 39 treesize of output 19 [2023-09-01 11:55:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:55:24,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:55:24,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100005072] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:55:24,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:55:24,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2023-09-01 11:55:24,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884801630] [2023-09-01 11:55:24,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:55:24,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:55:24,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:55:24,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-09-01 11:55:24,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 483 [2023-09-01 11:55:24,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 551 transitions, 11483 flow. Second operand has 12 states, 12 states have (on average 178.66666666666666) internal successors, (2144), 12 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:24,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:24,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 483 [2023-09-01 11:55:24,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:27,860 INFO L130 PetriNetUnfolder]: 5752/11268 cut-off events. [2023-09-01 11:55:27,860 INFO L131 PetriNetUnfolder]: For 314978/314978 co-relation queries the response was YES. [2023-09-01 11:55:27,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99596 conditions, 11268 events. 5752/11268 cut-off events. For 314978/314978 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 97337 event pairs, 1981 based on Foata normal form. 10/11278 useless extension candidates. Maximal degree in co-relation 99506. Up to 7865 conditions per place. [2023-09-01 11:55:27,978 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 459 selfloop transitions, 113 changer transitions 21/593 dead transitions. [2023-09-01 11:55:27,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 593 transitions, 13352 flow [2023-09-01 11:55:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:55:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:55:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1831 transitions. [2023-09-01 11:55:27,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37908902691511387 [2023-09-01 11:55:27,980 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1831 transitions. [2023-09-01 11:55:27,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1831 transitions. [2023-09-01 11:55:27,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:27,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1831 transitions. [2023-09-01 11:55:27,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 183.1) internal successors, (1831), 10 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:27,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:27,983 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:27,983 INFO L175 Difference]: Start difference. First operand has 271 places, 551 transitions, 11483 flow. Second operand 10 states and 1831 transitions. [2023-09-01 11:55:27,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 593 transitions, 13352 flow [2023-09-01 11:55:30,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 593 transitions, 13076 flow, removed 11 selfloop flow, removed 10 redundant places. [2023-09-01 11:55:30,948 INFO L231 Difference]: Finished difference. Result has 267 places, 549 transitions, 11637 flow [2023-09-01 11:55:30,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11233, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11637, PETRI_PLACES=267, PETRI_TRANSITIONS=549} [2023-09-01 11:55:30,948 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 242 predicate places. [2023-09-01 11:55:30,949 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 549 transitions, 11637 flow [2023-09-01 11:55:30,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 178.66666666666666) internal successors, (2144), 12 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:30,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:30,949 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] [2023-09-01 11:55:30,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:31,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 11:55:31,150 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:31,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1771610170, now seen corresponding path program 17 times [2023-09-01 11:55:31,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:31,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632208321] [2023-09-01 11:55:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:31,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:55:31,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:31,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632208321] [2023-09-01 11:55:31,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632208321] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:31,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34310869] [2023-09-01 11:55:31,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:55:31,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:31,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:31,545 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:31,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 11:55:31,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:55:31,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:31,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 11:55:31,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:31,787 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 [2023-09-01 11:55:31,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:55:31,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:55:32,024 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:55:32,024 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 52 treesize of output 24 [2023-09-01 11:55:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:55:32,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:55:34,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34310869] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:34,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:55:34,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 11] total 26 [2023-09-01 11:55:34,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142162816] [2023-09-01 11:55:34,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:55:34,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:55:34,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:34,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:55:34,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=598, Unknown=14, NotChecked=0, Total=756 [2023-09-01 11:55:35,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 483 [2023-09-01 11:55:35,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 549 transitions, 11637 flow. Second operand has 12 states, 12 states have (on average 141.66666666666666) internal successors, (1700), 12 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:35,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:35,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 483 [2023-09-01 11:55:35,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:39,600 INFO L130 PetriNetUnfolder]: 5756/11235 cut-off events. [2023-09-01 11:55:39,600 INFO L131 PetriNetUnfolder]: For 323262/323262 co-relation queries the response was YES. [2023-09-01 11:55:39,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99707 conditions, 11235 events. 5756/11235 cut-off events. For 323262/323262 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 96650 event pairs, 2166 based on Foata normal form. 5/11240 useless extension candidates. Maximal degree in co-relation 99616. Up to 7863 conditions per place. [2023-09-01 11:55:39,726 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 508 selfloop transitions, 123 changer transitions 12/643 dead transitions. [2023-09-01 11:55:39,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 643 transitions, 14617 flow [2023-09-01 11:55:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:55:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:55:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1898 transitions. [2023-09-01 11:55:39,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3022774327122153 [2023-09-01 11:55:39,728 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1898 transitions. [2023-09-01 11:55:39,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1898 transitions. [2023-09-01 11:55:39,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:39,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1898 transitions. [2023-09-01 11:55:39,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 146.0) internal successors, (1898), 13 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:39,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:39,733 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 483.0) internal successors, (6762), 14 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:39,733 INFO L175 Difference]: Start difference. First operand has 267 places, 549 transitions, 11637 flow. Second operand 13 states and 1898 transitions. [2023-09-01 11:55:39,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 643 transitions, 14617 flow [2023-09-01 11:55:42,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 643 transitions, 14324 flow, removed 46 selfloop flow, removed 7 redundant places. [2023-09-01 11:55:42,646 INFO L231 Difference]: Finished difference. Result has 273 places, 576 transitions, 12331 flow [2023-09-01 11:55:42,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11405, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12331, PETRI_PLACES=273, PETRI_TRANSITIONS=576} [2023-09-01 11:55:42,647 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 248 predicate places. [2023-09-01 11:55:42,647 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 576 transitions, 12331 flow [2023-09-01 11:55:42,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.66666666666666) internal successors, (1700), 12 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:42,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:42,648 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] [2023-09-01 11:55:42,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:42,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 11:55:42,848 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:42,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:42,849 INFO L85 PathProgramCache]: Analyzing trace with hash -99068368, now seen corresponding path program 18 times [2023-09-01 11:55:42,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:42,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427521599] [2023-09-01 11:55:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:42,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:55:43,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:43,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427521599] [2023-09-01 11:55:43,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427521599] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:43,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359144615] [2023-09-01 11:55:43,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:55:43,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:43,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:43,411 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:43,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 11:55:43,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 11:55:43,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:43,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 11:55:43,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:43,602 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 44 treesize of output 42 [2023-09-01 11:55:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:55:43,965 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:55:43,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-09-01 11:55:44,097 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:55:44,097 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 39 treesize of output 19 [2023-09-01 11:55:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:55:44,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:55:44,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359144615] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:55:44,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:55:44,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 22 [2023-09-01 11:55:44,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007880668] [2023-09-01 11:55:44,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:55:44,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:55:44,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:44,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:55:44,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:55:44,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 483 [2023-09-01 11:55:44,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 576 transitions, 12331 flow. Second operand has 13 states, 13 states have (on average 176.53846153846155) internal successors, (2295), 13 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:44,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:44,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 483 [2023-09-01 11:55:44,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:47,933 INFO L130 PetriNetUnfolder]: 5695/11129 cut-off events. [2023-09-01 11:55:47,934 INFO L131 PetriNetUnfolder]: For 319229/319229 co-relation queries the response was YES. [2023-09-01 11:55:48,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98565 conditions, 11129 events. 5695/11129 cut-off events. For 319229/319229 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 95880 event pairs, 1812 based on Foata normal form. 45/11174 useless extension candidates. Maximal degree in co-relation 98472. Up to 7869 conditions per place. [2023-09-01 11:55:48,055 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 465 selfloop transitions, 125 changer transitions 23/613 dead transitions. [2023-09-01 11:55:48,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 613 transitions, 14061 flow [2023-09-01 11:55:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:55:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:55:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1822 transitions. [2023-09-01 11:55:48,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772256728778468 [2023-09-01 11:55:48,058 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1822 transitions. [2023-09-01 11:55:48,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1822 transitions. [2023-09-01 11:55:48,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:48,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1822 transitions. [2023-09-01 11:55:48,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 182.2) internal successors, (1822), 10 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:48,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:48,062 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:48,062 INFO L175 Difference]: Start difference. First operand has 273 places, 576 transitions, 12331 flow. Second operand 10 states and 1822 transitions. [2023-09-01 11:55:48,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 613 transitions, 14061 flow [2023-09-01 11:55:50,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 613 transitions, 13996 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-09-01 11:55:50,901 INFO L231 Difference]: Finished difference. Result has 277 places, 563 transitions, 12334 flow [2023-09-01 11:55:50,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12221, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12334, PETRI_PLACES=277, PETRI_TRANSITIONS=563} [2023-09-01 11:55:50,902 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 252 predicate places. [2023-09-01 11:55:50,902 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 563 transitions, 12334 flow [2023-09-01 11:55:50,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 176.53846153846155) internal successors, (2295), 13 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:50,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:50,903 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] [2023-09-01 11:55:50,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:51,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 11:55:51,103 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:51,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash -349727208, now seen corresponding path program 19 times [2023-09-01 11:55:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:51,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720619630] [2023-09-01 11:55:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:51,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:55:51,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:51,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720619630] [2023-09-01 11:55:51,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720619630] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:51,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429140361] [2023-09-01 11:55:51,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:55:51,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:51,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:51,733 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:51,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 11:55:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:51,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 58 conjunts are in the unsatisfiable core [2023-09-01 11:55:51,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:51,993 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 [2023-09-01 11:55:52,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:55:52,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:55:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:55:52,265 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:55:52,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2023-09-01 11:55:52,447 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:55:52,447 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 39 treesize of output 19 [2023-09-01 11:55:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:55:52,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:53,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:53,763 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 233 treesize of output 125 [2023-09-01 11:55:53,778 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:55:53,779 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 2042 treesize of output 1810 [2023-09-01 11:55:53,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:53,862 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 978 treesize of output 918 [2023-09-01 11:55:53,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:53,886 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 869 treesize of output 773 [2023-09-01 11:55:59,994 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:59,995 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 41 treesize of output 30 [2023-09-01 11:56:00,008 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:56:00,008 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 66 treesize of output 57 [2023-09-01 11:56:00,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:56:00,020 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 50 treesize of output 50 [2023-09-01 11:56:00,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:56:00,050 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 41 treesize of output 30 [2023-09-01 11:56:00,062 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:56:00,062 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 66 treesize of output 57 [2023-09-01 11:56:00,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:56:00,074 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 50 treesize of output 50 [2023-09-01 11:56:00,101 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-09-01 11:56:00,101 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 233 treesize of output 1 [2023-09-01 11:56:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:56:04,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429140361] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:56:04,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:56:04,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 36 [2023-09-01 11:56:04,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479933502] [2023-09-01 11:56:04,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:56:04,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 11:56:04,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:04,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 11:56:04,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1197, Unknown=31, NotChecked=0, Total=1406 [2023-09-01 11:56:04,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 483 [2023-09-01 11:56:04,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 563 transitions, 12334 flow. Second operand has 38 states, 38 states have (on average 129.5) internal successors, (4921), 38 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:04,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:04,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 483 [2023-09-01 11:56:04,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:11,669 INFO L130 PetriNetUnfolder]: 5562/10870 cut-off events. [2023-09-01 11:56:11,669 INFO L131 PetriNetUnfolder]: For 314747/314747 co-relation queries the response was YES. [2023-09-01 11:56:11,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96749 conditions, 10870 events. 5562/10870 cut-off events. For 314747/314747 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 93128 event pairs, 1247 based on Foata normal form. 65/10935 useless extension candidates. Maximal degree in co-relation 96654. Up to 4535 conditions per place. [2023-09-01 11:56:11,815 INFO L137 encePairwiseOnDemand]: 468/483 looper letters, 412 selfloop transitions, 244 changer transitions 33/689 dead transitions. [2023-09-01 11:56:11,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 689 transitions, 15650 flow [2023-09-01 11:56:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:56:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:56:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2547 transitions. [2023-09-01 11:56:11,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27754168028767573 [2023-09-01 11:56:11,818 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2547 transitions. [2023-09-01 11:56:11,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2547 transitions. [2023-09-01 11:56:11,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:11,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2547 transitions. [2023-09-01 11:56:11,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 134.05263157894737) internal successors, (2547), 19 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:11,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:11,824 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 483.0) internal successors, (9660), 20 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:11,824 INFO L175 Difference]: Start difference. First operand has 277 places, 563 transitions, 12334 flow. Second operand 19 states and 2547 transitions. [2023-09-01 11:56:11,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 689 transitions, 15650 flow [2023-09-01 11:56:14,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 689 transitions, 15396 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-09-01 11:56:14,652 INFO L231 Difference]: Finished difference. Result has 286 places, 577 transitions, 13105 flow [2023-09-01 11:56:14,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11819, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13105, PETRI_PLACES=286, PETRI_TRANSITIONS=577} [2023-09-01 11:56:14,653 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 261 predicate places. [2023-09-01 11:56:14,653 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 577 transitions, 13105 flow [2023-09-01 11:56:14,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 129.5) internal successors, (4921), 38 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:14,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:14,654 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] [2023-09-01 11:56:14,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-09-01 11:56:14,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 11:56:14,861 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:14,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash 904650408, now seen corresponding path program 20 times [2023-09-01 11:56:14,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:14,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33048638] [2023-09-01 11:56:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:56:15,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33048638] [2023-09-01 11:56:15,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33048638] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004474587] [2023-09-01 11:56:15,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:56:15,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:15,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:15,359 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:15,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 11:56:15,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:56:15,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:56:15,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 11:56:15,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:15,742 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:56:15,742 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 52 treesize of output 24 [2023-09-01 11:56:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:56:15,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:56:15,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004474587] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:56:15,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:56:15,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 15 [2023-09-01 11:56:15,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206799789] [2023-09-01 11:56:15,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:56:15,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:56:15,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:15,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:56:15,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-09-01 11:56:16,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 483 [2023-09-01 11:56:16,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 577 transitions, 13105 flow. Second operand has 11 states, 11 states have (on average 181.8181818181818) internal successors, (2000), 11 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:16,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:16,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 483 [2023-09-01 11:56:16,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:18,823 INFO L130 PetriNetUnfolder]: 5508/10701 cut-off events. [2023-09-01 11:56:18,823 INFO L131 PetriNetUnfolder]: For 321076/321076 co-relation queries the response was YES. [2023-09-01 11:56:18,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97511 conditions, 10701 events. 5508/10701 cut-off events. For 321076/321076 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 90737 event pairs, 1870 based on Foata normal form. 5/10706 useless extension candidates. Maximal degree in co-relation 97416. Up to 7964 conditions per place. [2023-09-01 11:56:18,954 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 524 selfloop transitions, 72 changer transitions 7/603 dead transitions. [2023-09-01 11:56:18,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 603 transitions, 14583 flow [2023-09-01 11:56:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:56:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:56:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1682 transitions. [2023-09-01 11:56:18,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38693351736829995 [2023-09-01 11:56:18,956 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1682 transitions. [2023-09-01 11:56:18,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1682 transitions. [2023-09-01 11:56:18,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:18,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1682 transitions. [2023-09-01 11:56:18,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 186.88888888888889) internal successors, (1682), 9 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:18,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:18,959 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:18,959 INFO L175 Difference]: Start difference. First operand has 286 places, 577 transitions, 13105 flow. Second operand 9 states and 1682 transitions. [2023-09-01 11:56:18,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 603 transitions, 14583 flow [2023-09-01 11:56:21,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 603 transitions, 14229 flow, removed 42 selfloop flow, removed 15 redundant places. [2023-09-01 11:56:21,573 INFO L231 Difference]: Finished difference. Result has 275 places, 576 transitions, 12907 flow [2023-09-01 11:56:21,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12765, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12907, PETRI_PLACES=275, PETRI_TRANSITIONS=576} [2023-09-01 11:56:21,574 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 250 predicate places. [2023-09-01 11:56:21,574 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 576 transitions, 12907 flow [2023-09-01 11:56:21,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 181.8181818181818) internal successors, (2000), 11 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:21,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:21,575 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] [2023-09-01 11:56:21,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-09-01 11:56:21,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:21,780 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:21,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:21,781 INFO L85 PathProgramCache]: Analyzing trace with hash 642364352, now seen corresponding path program 1 times [2023-09-01 11:56:21,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:21,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930617612] [2023-09-01 11:56:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:56:22,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:22,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930617612] [2023-09-01 11:56:22,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930617612] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:22,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001639342] [2023-09-01 11:56:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:22,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:22,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:22,057 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:22,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 11:56:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:22,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 46 conjunts are in the unsatisfiable core [2023-09-01 11:56:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:22,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:56:22,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:56:22,241 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 11:56:22,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 11:56:22,280 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 [2023-09-01 11:56:22,315 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:56:22,315 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 11 treesize of output 11 [2023-09-01 11:56:22,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-09-01 11:56:22,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:56:22,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:56:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:56:22,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:56:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:56:22,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001639342] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:22,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:56:22,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 11] total 23 [2023-09-01 11:56:22,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918405631] [2023-09-01 11:56:22,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:56:22,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:56:22,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:22,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:56:22,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-09-01 11:56:22,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 483 [2023-09-01 11:56:22,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 576 transitions, 12907 flow. Second operand has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:22,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:22,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 483 [2023-09-01 11:56:22,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:25,147 INFO L130 PetriNetUnfolder]: 5504/10718 cut-off events. [2023-09-01 11:56:25,147 INFO L131 PetriNetUnfolder]: For 319308/319308 co-relation queries the response was YES. [2023-09-01 11:56:25,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96891 conditions, 10718 events. 5504/10718 cut-off events. For 319308/319308 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 90926 event pairs, 2113 based on Foata normal form. 20/10738 useless extension candidates. Maximal degree in co-relation 96799. Up to 9354 conditions per place. [2023-09-01 11:56:25,285 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 593 selfloop transitions, 41 changer transitions 2/636 dead transitions. [2023-09-01 11:56:25,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 636 transitions, 15320 flow [2023-09-01 11:56:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:56:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:56:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1236 transitions. [2023-09-01 11:56:25,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42650103519668736 [2023-09-01 11:56:25,287 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1236 transitions. [2023-09-01 11:56:25,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1236 transitions. [2023-09-01 11:56:25,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:25,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1236 transitions. [2023-09-01 11:56:25,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:25,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:25,290 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 483.0) internal successors, (3381), 7 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:25,290 INFO L175 Difference]: Start difference. First operand has 275 places, 576 transitions, 12907 flow. Second operand 6 states and 1236 transitions. [2023-09-01 11:56:25,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 636 transitions, 15320 flow [2023-09-01 11:56:28,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 636 transitions, 14777 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-09-01 11:56:28,187 INFO L231 Difference]: Finished difference. Result has 267 places, 588 transitions, 12880 flow [2023-09-01 11:56:28,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12397, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12880, PETRI_PLACES=267, PETRI_TRANSITIONS=588} [2023-09-01 11:56:28,188 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 242 predicate places. [2023-09-01 11:56:28,188 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 588 transitions, 12880 flow [2023-09-01 11:56:28,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:28,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:28,188 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] [2023-09-01 11:56:28,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 11:56:28,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-09-01 11:56:28,393 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:28,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:28,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2101077848, now seen corresponding path program 2 times [2023-09-01 11:56:28,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:28,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036360113] [2023-09-01 11:56:28,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:28,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:56:28,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:28,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036360113] [2023-09-01 11:56:28,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036360113] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:56:28,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:56:28,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 11:56:28,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700046935] [2023-09-01 11:56:28,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:56:28,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:56:28,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:28,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:56:28,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:56:28,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-09-01 11:56:28,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 588 transitions, 12880 flow. Second operand has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:28,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:28,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-09-01 11:56:28,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:31,365 INFO L130 PetriNetUnfolder]: 5576/10846 cut-off events. [2023-09-01 11:56:31,365 INFO L131 PetriNetUnfolder]: For 315481/315481 co-relation queries the response was YES. [2023-09-01 11:56:31,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97298 conditions, 10846 events. 5576/10846 cut-off events. For 315481/315481 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 92192 event pairs, 1987 based on Foata normal form. 56/10902 useless extension candidates. Maximal degree in co-relation 97204. Up to 8036 conditions per place. [2023-09-01 11:56:31,511 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 543 selfloop transitions, 74 changer transitions 1/618 dead transitions. [2023-09-01 11:56:31,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 618 transitions, 14649 flow [2023-09-01 11:56:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:56:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:56:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1399 transitions. [2023-09-01 11:56:31,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137829044661343 [2023-09-01 11:56:31,512 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1399 transitions. [2023-09-01 11:56:31,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1399 transitions. [2023-09-01 11:56:31,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:31,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1399 transitions. [2023-09-01 11:56:31,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.85714285714286) internal successors, (1399), 7 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:31,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:31,515 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:31,515 INFO L175 Difference]: Start difference. First operand has 267 places, 588 transitions, 12880 flow. Second operand 7 states and 1399 transitions. [2023-09-01 11:56:31,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 618 transitions, 14649 flow [2023-09-01 11:56:33,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 618 transitions, 14599 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-09-01 11:56:33,974 INFO L231 Difference]: Finished difference. Result has 273 places, 594 transitions, 13179 flow [2023-09-01 11:56:33,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12835, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13179, PETRI_PLACES=273, PETRI_TRANSITIONS=594} [2023-09-01 11:56:33,975 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 248 predicate places. [2023-09-01 11:56:33,975 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 594 transitions, 13179 flow [2023-09-01 11:56:33,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:33,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:33,976 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] [2023-09-01 11:56:33,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-09-01 11:56:33,976 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:33,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2001726862, now seen corresponding path program 3 times [2023-09-01 11:56:33,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:33,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547827523] [2023-09-01 11:56:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:33,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:56:34,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:34,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547827523] [2023-09-01 11:56:34,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547827523] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:56:34,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:56:34,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 11:56:34,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973567688] [2023-09-01 11:56:34,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:56:34,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:56:34,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:34,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:56:34,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:56:34,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-09-01 11:56:34,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 594 transitions, 13179 flow. Second operand has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:34,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:34,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-09-01 11:56:34,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:36,899 INFO L130 PetriNetUnfolder]: 5247/10141 cut-off events. [2023-09-01 11:56:36,899 INFO L131 PetriNetUnfolder]: For 311998/311998 co-relation queries the response was YES. [2023-09-01 11:56:36,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92613 conditions, 10141 events. 5247/10141 cut-off events. For 311998/311998 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 84309 event pairs, 1985 based on Foata normal form. 56/10197 useless extension candidates. Maximal degree in co-relation 92518. Up to 8040 conditions per place. [2023-09-01 11:56:37,012 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 495 selfloop transitions, 87 changer transitions 0/582 dead transitions. [2023-09-01 11:56:37,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 582 transitions, 13962 flow [2023-09-01 11:56:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:56:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:56:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1399 transitions. [2023-09-01 11:56:37,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137829044661343 [2023-09-01 11:56:37,014 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1399 transitions. [2023-09-01 11:56:37,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1399 transitions. [2023-09-01 11:56:37,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:37,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1399 transitions. [2023-09-01 11:56:37,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.85714285714286) internal successors, (1399), 7 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:37,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:37,018 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:37,018 INFO L175 Difference]: Start difference. First operand has 273 places, 594 transitions, 13179 flow. Second operand 7 states and 1399 transitions. [2023-09-01 11:56:37,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 582 transitions, 13962 flow [2023-09-01 11:56:39,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 582 transitions, 13810 flow, removed 35 selfloop flow, removed 9 redundant places. [2023-09-01 11:56:39,252 INFO L231 Difference]: Finished difference. Result has 264 places, 563 transitions, 12633 flow [2023-09-01 11:56:39,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12417, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12633, PETRI_PLACES=264, PETRI_TRANSITIONS=563} [2023-09-01 11:56:39,253 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 239 predicate places. [2023-09-01 11:56:39,253 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 563 transitions, 12633 flow [2023-09-01 11:56:39,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:39,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:39,254 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] [2023-09-01 11:56:39,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-09-01 11:56:39,254 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:39,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:39,254 INFO L85 PathProgramCache]: Analyzing trace with hash 150263440, now seen corresponding path program 4 times [2023-09-01 11:56:39,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:39,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855624671] [2023-09-01 11:56:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:39,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:56:39,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:39,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855624671] [2023-09-01 11:56:39,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855624671] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:39,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421419807] [2023-09-01 11:56:39,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:56:39,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:39,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:39,521 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:39,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 11:56:39,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:56:39,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:56:39,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 11:56:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:56:39,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:56:39,788 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:56:39,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:56:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:56:39,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421419807] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:56:39,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:56:39,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-09-01 11:56:39,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142564396] [2023-09-01 11:56:39,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:56:39,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 11:56:39,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:39,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 11:56:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-09-01 11:56:40,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-09-01 11:56:40,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 563 transitions, 12633 flow. Second operand has 15 states, 15 states have (on average 194.6) internal successors, (2919), 15 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:40,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:40,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-09-01 11:56:40,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:42,768 INFO L130 PetriNetUnfolder]: 5289/10215 cut-off events. [2023-09-01 11:56:42,769 INFO L131 PetriNetUnfolder]: For 270388/270388 co-relation queries the response was YES. [2023-09-01 11:56:42,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91213 conditions, 10215 events. 5289/10215 cut-off events. For 270388/270388 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 84919 event pairs, 573 based on Foata normal form. 20/10235 useless extension candidates. Maximal degree in co-relation 91122. Up to 5855 conditions per place. [2023-09-01 11:56:42,899 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 354 selfloop transitions, 269 changer transitions 14/637 dead transitions. [2023-09-01 11:56:42,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 637 transitions, 15115 flow [2023-09-01 11:56:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:56:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:56:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1590 transitions. [2023-09-01 11:56:42,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114906832298137 [2023-09-01 11:56:42,901 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1590 transitions. [2023-09-01 11:56:42,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1590 transitions. [2023-09-01 11:56:42,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:42,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1590 transitions. [2023-09-01 11:56:42,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.75) internal successors, (1590), 8 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:42,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:42,904 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:42,904 INFO L175 Difference]: Start difference. First operand has 264 places, 563 transitions, 12633 flow. Second operand 8 states and 1590 transitions. [2023-09-01 11:56:42,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 637 transitions, 15115 flow [2023-09-01 11:56:45,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 637 transitions, 15016 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 11:56:45,266 INFO L231 Difference]: Finished difference. Result has 269 places, 565 transitions, 13146 flow [2023-09-01 11:56:45,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12538, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13146, PETRI_PLACES=269, PETRI_TRANSITIONS=565} [2023-09-01 11:56:45,267 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 244 predicate places. [2023-09-01 11:56:45,267 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 565 transitions, 13146 flow [2023-09-01 11:56:45,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 194.6) internal successors, (2919), 15 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:45,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:45,267 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] [2023-09-01 11:56:45,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 11:56:45,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-09-01 11:56:45,468 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:45,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:45,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2119395894, now seen corresponding path program 5 times [2023-09-01 11:56:45,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:45,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981446596] [2023-09-01 11:56:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:45,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:56:45,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:45,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981446596] [2023-09-01 11:56:45,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981446596] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:56:45,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:56:45,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 11:56:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108909077] [2023-09-01 11:56:45,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:56:45,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:56:45,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:45,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:56:45,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:56:46,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-09-01 11:56:46,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 565 transitions, 13146 flow. Second operand has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:46,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:46,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-09-01 11:56:46,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:48,470 INFO L130 PetriNetUnfolder]: 5300/10232 cut-off events. [2023-09-01 11:56:48,470 INFO L131 PetriNetUnfolder]: For 301905/301905 co-relation queries the response was YES. [2023-09-01 11:56:48,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93275 conditions, 10232 events. 5300/10232 cut-off events. For 301905/301905 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 84959 event pairs, 1560 based on Foata normal form. 20/10252 useless extension candidates. Maximal degree in co-relation 93182. Up to 6994 conditions per place. [2023-09-01 11:56:48,598 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 316 selfloop transitions, 275 changer transitions 6/597 dead transitions. [2023-09-01 11:56:48,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 597 transitions, 14863 flow [2023-09-01 11:56:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:56:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:56:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1399 transitions. [2023-09-01 11:56:48,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137829044661343 [2023-09-01 11:56:48,599 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1399 transitions. [2023-09-01 11:56:48,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1399 transitions. [2023-09-01 11:56:48,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:48,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1399 transitions. [2023-09-01 11:56:48,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.85714285714286) internal successors, (1399), 7 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:48,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:48,602 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:48,602 INFO L175 Difference]: Start difference. First operand has 269 places, 565 transitions, 13146 flow. Second operand 7 states and 1399 transitions. [2023-09-01 11:56:48,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 597 transitions, 14863 flow [2023-09-01 11:56:50,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 597 transitions, 14229 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-09-01 11:56:50,855 INFO L231 Difference]: Finished difference. Result has 271 places, 566 transitions, 13146 flow [2023-09-01 11:56:50,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12475, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13146, PETRI_PLACES=271, PETRI_TRANSITIONS=566} [2023-09-01 11:56:50,856 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 246 predicate places. [2023-09-01 11:56:50,856 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 566 transitions, 13146 flow [2023-09-01 11:56:50,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:50,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:50,856 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] [2023-09-01 11:56:50,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-09-01 11:56:50,856 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:50,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1912599798, now seen corresponding path program 6 times [2023-09-01 11:56:50,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:50,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384372902] [2023-09-01 11:56:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:50,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:56:51,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:51,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384372902] [2023-09-01 11:56:51,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384372902] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:56:51,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:56:51,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 11:56:51,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127190381] [2023-09-01 11:56:51,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:56:51,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:56:51,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:51,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:56:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:56:51,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-09-01 11:56:51,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 566 transitions, 13146 flow. Second operand has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:51,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:51,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-09-01 11:56:51,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:53,581 INFO L130 PetriNetUnfolder]: 5087/9813 cut-off events. [2023-09-01 11:56:53,582 INFO L131 PetriNetUnfolder]: For 282542/282542 co-relation queries the response was YES. [2023-09-01 11:56:53,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89527 conditions, 9813 events. 5087/9813 cut-off events. For 282542/282542 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 80709 event pairs, 1558 based on Foata normal form. 36/9849 useless extension candidates. Maximal degree in co-relation 89434. Up to 7080 conditions per place. [2023-09-01 11:56:53,696 INFO L137 encePairwiseOnDemand]: 476/483 looper letters, 276 selfloop transitions, 275 changer transitions 6/557 dead transitions. [2023-09-01 11:56:53,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 557 transitions, 13951 flow [2023-09-01 11:56:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:56:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:56:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1389 transitions. [2023-09-01 11:56:53,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108251996450754 [2023-09-01 11:56:53,697 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1389 transitions. [2023-09-01 11:56:53,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1389 transitions. [2023-09-01 11:56:53,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:53,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1389 transitions. [2023-09-01 11:56:53,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.42857142857142) internal successors, (1389), 7 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:53,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:53,700 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 483.0) internal successors, (3864), 8 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:53,700 INFO L175 Difference]: Start difference. First operand has 271 places, 566 transitions, 13146 flow. Second operand 7 states and 1389 transitions. [2023-09-01 11:56:53,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 557 transitions, 13951 flow [2023-09-01 11:56:55,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 557 transitions, 13603 flow, removed 34 selfloop flow, removed 11 redundant places. [2023-09-01 11:56:55,722 INFO L231 Difference]: Finished difference. Result has 259 places, 538 transitions, 12816 flow [2023-09-01 11:56:55,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12371, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12816, PETRI_PLACES=259, PETRI_TRANSITIONS=538} [2023-09-01 11:56:55,723 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 234 predicate places. [2023-09-01 11:56:55,723 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 538 transitions, 12816 flow [2023-09-01 11:56:55,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:55,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:55,723 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] [2023-09-01 11:56:55,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-09-01 11:56:55,723 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:55,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash 496765336, now seen corresponding path program 7 times [2023-09-01 11:56:55,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:55,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149332482] [2023-09-01 11:56:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:56:55,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:55,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149332482] [2023-09-01 11:56:55,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149332482] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:56:55,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:56:55,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 11:56:55,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938800257] [2023-09-01 11:56:55,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:56:55,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 11:56:55,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:55,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 11:56:55,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-09-01 11:56:56,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-09-01 11:56:56,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 538 transitions, 12816 flow. Second operand has 10 states, 10 states have (on average 191.1) internal successors, (1911), 10 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:56,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:56,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-09-01 11:56:56,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:58,531 INFO L130 PetriNetUnfolder]: 4998/9642 cut-off events. [2023-09-01 11:56:58,531 INFO L131 PetriNetUnfolder]: For 257939/257939 co-relation queries the response was YES. [2023-09-01 11:56:58,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87129 conditions, 9642 events. 4998/9642 cut-off events. For 257939/257939 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 79202 event pairs, 1860 based on Foata normal form. 20/9662 useless extension candidates. Maximal degree in co-relation 87043. Up to 8070 conditions per place. [2023-09-01 11:56:58,656 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 471 selfloop transitions, 84 changer transitions 2/557 dead transitions. [2023-09-01 11:56:58,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 557 transitions, 14160 flow [2023-09-01 11:56:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:56:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:56:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1566 transitions. [2023-09-01 11:56:58,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052795031055901 [2023-09-01 11:56:58,658 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1566 transitions. [2023-09-01 11:56:58,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1566 transitions. [2023-09-01 11:56:58,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:58,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1566 transitions. [2023-09-01 11:56:58,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.75) internal successors, (1566), 8 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:58,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:58,661 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:58,661 INFO L175 Difference]: Start difference. First operand has 259 places, 538 transitions, 12816 flow. Second operand 8 states and 1566 transitions. [2023-09-01 11:56:58,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 557 transitions, 14160 flow [2023-09-01 11:57:00,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 557 transitions, 13534 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-09-01 11:57:00,769 INFO L231 Difference]: Finished difference. Result has 258 places, 535 transitions, 12323 flow [2023-09-01 11:57:00,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12151, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12323, PETRI_PLACES=258, PETRI_TRANSITIONS=535} [2023-09-01 11:57:00,770 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 233 predicate places. [2023-09-01 11:57:00,770 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 535 transitions, 12323 flow [2023-09-01 11:57:00,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 191.1) internal successors, (1911), 10 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:00,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:00,771 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] [2023-09-01 11:57:00,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-09-01 11:57:00,771 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:00,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:00,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1130417944, now seen corresponding path program 8 times [2023-09-01 11:57:00,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:00,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079771603] [2023-09-01 11:57:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:00,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:57:01,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:01,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079771603] [2023-09-01 11:57:01,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079771603] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:57:01,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:57:01,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:57:01,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136226400] [2023-09-01 11:57:01,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:57:01,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:57:01,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:01,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:57:01,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:57:01,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-09-01 11:57:01,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 535 transitions, 12323 flow. Second operand has 11 states, 11 states have (on average 190.9090909090909) internal successors, (2100), 11 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:01,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:01,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-09-01 11:57:01,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:03,883 INFO L130 PetriNetUnfolder]: 5058/9807 cut-off events. [2023-09-01 11:57:03,883 INFO L131 PetriNetUnfolder]: For 247148/247148 co-relation queries the response was YES. [2023-09-01 11:57:03,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87256 conditions, 9807 events. 5058/9807 cut-off events. For 247148/247148 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 81261 event pairs, 1827 based on Foata normal form. 30/9837 useless extension candidates. Maximal degree in co-relation 87170. Up to 8070 conditions per place. [2023-09-01 11:57:04,009 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 506 selfloop transitions, 59 changer transitions 19/584 dead transitions. [2023-09-01 11:57:04,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 584 transitions, 14154 flow [2023-09-01 11:57:04,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:57:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:57:04,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1957 transitions. [2023-09-01 11:57:04,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405175983436853 [2023-09-01 11:57:04,011 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1957 transitions. [2023-09-01 11:57:04,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1957 transitions. [2023-09-01 11:57:04,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:04,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1957 transitions. [2023-09-01 11:57:04,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 195.7) internal successors, (1957), 10 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:04,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:04,014 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:04,014 INFO L175 Difference]: Start difference. First operand has 258 places, 535 transitions, 12323 flow. Second operand 10 states and 1957 transitions. [2023-09-01 11:57:04,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 584 transitions, 14154 flow [2023-09-01 11:57:06,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 584 transitions, 14038 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-09-01 11:57:06,106 INFO L231 Difference]: Finished difference. Result has 261 places, 526 transitions, 12123 flow [2023-09-01 11:57:06,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=12207, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12123, PETRI_PLACES=261, PETRI_TRANSITIONS=526} [2023-09-01 11:57:06,107 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 236 predicate places. [2023-09-01 11:57:06,107 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 526 transitions, 12123 flow [2023-09-01 11:57:06,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 190.9090909090909) internal successors, (2100), 11 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:06,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:06,108 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] [2023-09-01 11:57:06,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-09-01 11:57:06,108 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:06,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:06,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1778753870, now seen corresponding path program 9 times [2023-09-01 11:57:06,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:06,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833315341] [2023-09-01 11:57:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:06,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:57:06,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:06,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833315341] [2023-09-01 11:57:06,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833315341] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:57:06,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056448450] [2023-09-01 11:57:06,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:57:06,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:06,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:57:06,332 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:57:06,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 11:57:06,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:57:06,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:57:06,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 11:57:06,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:57:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:57:06,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:57:06,661 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:57:06,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:57:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:57:06,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056448450] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:57:06,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:57:06,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2023-09-01 11:57:06,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290175737] [2023-09-01 11:57:06,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:57:06,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 11:57:06,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:06,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 11:57:06,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-09-01 11:57:07,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-09-01 11:57:07,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 526 transitions, 12123 flow. Second operand has 14 states, 14 states have (on average 194.71428571428572) internal successors, (2726), 14 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:07,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:07,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-09-01 11:57:07,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:09,346 INFO L130 PetriNetUnfolder]: 4903/9459 cut-off events. [2023-09-01 11:57:09,346 INFO L131 PetriNetUnfolder]: For 243593/243593 co-relation queries the response was YES. [2023-09-01 11:57:09,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84275 conditions, 9459 events. 4903/9459 cut-off events. For 243593/243593 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 77536 event pairs, 1806 based on Foata normal form. 20/9479 useless extension candidates. Maximal degree in co-relation 84189. Up to 8073 conditions per place. [2023-09-01 11:57:09,465 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 448 selfloop transitions, 87 changer transitions 5/540 dead transitions. [2023-09-01 11:57:09,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 540 transitions, 13299 flow [2023-09-01 11:57:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:57:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:57:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1597 transitions. [2023-09-01 11:57:09,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4133022774327122 [2023-09-01 11:57:09,467 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1597 transitions. [2023-09-01 11:57:09,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1597 transitions. [2023-09-01 11:57:09,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:09,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1597 transitions. [2023-09-01 11:57:09,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 199.625) internal successors, (1597), 8 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:09,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:09,471 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 483.0) internal successors, (4347), 9 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:09,471 INFO L175 Difference]: Start difference. First operand has 261 places, 526 transitions, 12123 flow. Second operand 8 states and 1597 transitions. [2023-09-01 11:57:09,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 540 transitions, 13299 flow [2023-09-01 11:57:11,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 540 transitions, 13083 flow, removed 19 selfloop flow, removed 14 redundant places. [2023-09-01 11:57:11,425 INFO L231 Difference]: Finished difference. Result has 254 places, 518 transitions, 12006 flow [2023-09-01 11:57:11,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11783, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12006, PETRI_PLACES=254, PETRI_TRANSITIONS=518} [2023-09-01 11:57:11,426 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 229 predicate places. [2023-09-01 11:57:11,426 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 518 transitions, 12006 flow [2023-09-01 11:57:11,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 194.71428571428572) internal successors, (2726), 14 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:11,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:11,427 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:57:11,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-09-01 11:57:11,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-09-01 11:57:11,632 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:11,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2109707449, now seen corresponding path program 2 times [2023-09-01 11:57:11,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:11,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979100445] [2023-09-01 11:57:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:11,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:57:11,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:11,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979100445] [2023-09-01 11:57:11,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979100445] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:57:11,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053315737] [2023-09-01 11:57:11,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:57:11,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:11,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:57:11,791 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:57:11,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 11:57:11,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:57:11,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:57:11,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 11:57:11,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:57:12,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:12,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 141 [2023-09-01 11:57:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:57:12,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:57:12,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:12,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-09-01 11:57:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:57:12,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053315737] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:57:12,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:57:12,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-09-01 11:57:12,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553330227] [2023-09-01 11:57:12,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:57:12,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 11:57:12,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:12,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 11:57:12,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-09-01 11:57:13,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 483 [2023-09-01 11:57:13,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 518 transitions, 12006 flow. Second operand has 27 states, 27 states have (on average 183.0) internal successors, (4941), 27 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:13,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:13,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 483 [2023-09-01 11:57:13,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:17,565 INFO L130 PetriNetUnfolder]: 5270/10157 cut-off events. [2023-09-01 11:57:17,566 INFO L131 PetriNetUnfolder]: For 266895/266895 co-relation queries the response was YES. [2023-09-01 11:57:17,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90161 conditions, 10157 events. 5270/10157 cut-off events. For 266895/266895 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 84445 event pairs, 951 based on Foata normal form. 160/10317 useless extension candidates. Maximal degree in co-relation 90078. Up to 3198 conditions per place. [2023-09-01 11:57:17,686 INFO L137 encePairwiseOnDemand]: 468/483 looper letters, 647 selfloop transitions, 625 changer transitions 69/1341 dead transitions. [2023-09-01 11:57:17,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1341 transitions, 31087 flow [2023-09-01 11:57:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 11:57:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 11:57:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 8435 transitions. [2023-09-01 11:57:17,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38808373590982287 [2023-09-01 11:57:17,691 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 8435 transitions. [2023-09-01 11:57:17,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 8435 transitions. [2023-09-01 11:57:17,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:17,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 8435 transitions. [2023-09-01 11:57:17,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 187.44444444444446) internal successors, (8435), 45 states have internal predecessors, (8435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:17,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 483.0) internal successors, (22218), 46 states have internal predecessors, (22218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:17,713 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 483.0) internal successors, (22218), 46 states have internal predecessors, (22218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:17,713 INFO L175 Difference]: Start difference. First operand has 254 places, 518 transitions, 12006 flow. Second operand 45 states and 8435 transitions. [2023-09-01 11:57:17,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1341 transitions, 31087 flow [2023-09-01 11:57:20,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1341 transitions, 30709 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-09-01 11:57:20,085 INFO L231 Difference]: Finished difference. Result has 311 places, 881 transitions, 22917 flow [2023-09-01 11:57:20,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11814, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=22917, PETRI_PLACES=311, PETRI_TRANSITIONS=881} [2023-09-01 11:57:20,086 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 286 predicate places. [2023-09-01 11:57:20,086 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 881 transitions, 22917 flow [2023-09-01 11:57:20,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 183.0) internal successors, (4941), 27 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:20,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:20,087 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] [2023-09-01 11:57:20,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-09-01 11:57:20,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:20,287 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:20,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:20,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1768613792, now seen corresponding path program 10 times [2023-09-01 11:57:20,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:20,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974012004] [2023-09-01 11:57:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:20,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:57:20,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:20,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974012004] [2023-09-01 11:57:20,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974012004] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:57:20,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:57:20,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:57:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917355943] [2023-09-01 11:57:20,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:57:20,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:57:20,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:20,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:57:20,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:57:20,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 483 [2023-09-01 11:57:20,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 881 transitions, 22917 flow. Second operand has 11 states, 11 states have (on average 188.9090909090909) internal successors, (2078), 11 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:20,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:20,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 483 [2023-09-01 11:57:20,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:23,793 INFO L130 PetriNetUnfolder]: 4977/9639 cut-off events. [2023-09-01 11:57:23,793 INFO L131 PetriNetUnfolder]: For 294540/294540 co-relation queries the response was YES. [2023-09-01 11:57:23,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93729 conditions, 9639 events. 4977/9639 cut-off events. For 294540/294540 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 79902 event pairs, 1792 based on Foata normal form. 30/9669 useless extension candidates. Maximal degree in co-relation 93626. Up to 8431 conditions per place. [2023-09-01 11:57:23,921 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 768 selfloop transitions, 126 changer transitions 20/914 dead transitions. [2023-09-01 11:57:23,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 914 transitions, 25166 flow [2023-09-01 11:57:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:57:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:57:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1930 transitions. [2023-09-01 11:57:23,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995859213250518 [2023-09-01 11:57:23,923 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1930 transitions. [2023-09-01 11:57:23,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1930 transitions. [2023-09-01 11:57:23,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:23,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1930 transitions. [2023-09-01 11:57:23,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.0) internal successors, (1930), 10 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:23,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:23,927 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 483.0) internal successors, (5313), 11 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:23,927 INFO L175 Difference]: Start difference. First operand has 311 places, 881 transitions, 22917 flow. Second operand 10 states and 1930 transitions. [2023-09-01 11:57:23,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 914 transitions, 25166 flow [2023-09-01 11:57:27,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 914 transitions, 24267 flow, removed 436 selfloop flow, removed 10 redundant places. [2023-09-01 11:57:27,133 INFO L231 Difference]: Finished difference. Result has 307 places, 874 transitions, 22163 flow [2023-09-01 11:57:27,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=22063, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22163, PETRI_PLACES=307, PETRI_TRANSITIONS=874} [2023-09-01 11:57:27,134 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 282 predicate places. [2023-09-01 11:57:27,134 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 874 transitions, 22163 flow [2023-09-01 11:57:27,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 188.9090909090909) internal successors, (2078), 11 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:27,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:27,135 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:57:27,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-09-01 11:57:27,135 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:27,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:27,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2075885073, now seen corresponding path program 3 times [2023-09-01 11:57:27,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:27,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897683614] [2023-09-01 11:57:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:27,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:57:27,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:27,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897683614] [2023-09-01 11:57:27,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897683614] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:57:27,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941698505] [2023-09-01 11:57:27,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:57:27,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:27,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:57:27,332 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:57:27,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 11:57:27,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:57:27,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:57:27,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 11:57:27,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:57:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:57:27,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:57:27,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:27,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-09-01 11:57:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:57:28,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941698505] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:57:28,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:57:28,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-09-01 11:57:28,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624606678] [2023-09-01 11:57:28,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:57:28,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 11:57:28,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 11:57:28,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2023-09-01 11:57:29,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-09-01 11:57:29,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 874 transitions, 22163 flow. Second operand has 29 states, 29 states have (on average 186.86206896551724) internal successors, (5419), 29 states have internal predecessors, (5419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:29,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:29,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-09-01 11:57:29,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:32,867 INFO L130 PetriNetUnfolder]: 5062/9802 cut-off events. [2023-09-01 11:57:32,867 INFO L131 PetriNetUnfolder]: For 288953/288953 co-relation queries the response was YES. [2023-09-01 11:57:32,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93164 conditions, 9802 events. 5062/9802 cut-off events. For 288953/288953 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 81199 event pairs, 1842 based on Foata normal form. 90/9892 useless extension candidates. Maximal degree in co-relation 93063. Up to 5613 conditions per place. [2023-09-01 11:57:32,999 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 1049 selfloop transitions, 139 changer transitions 20/1208 dead transitions. [2023-09-01 11:57:33,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1208 transitions, 30091 flow [2023-09-01 11:57:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 11:57:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 11:57:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3097 transitions. [2023-09-01 11:57:33,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007505175983437 [2023-09-01 11:57:33,002 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3097 transitions. [2023-09-01 11:57:33,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3097 transitions. [2023-09-01 11:57:33,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:33,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3097 transitions. [2023-09-01 11:57:33,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 193.5625) internal successors, (3097), 16 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:33,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:33,007 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 483.0) internal successors, (8211), 17 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:33,007 INFO L175 Difference]: Start difference. First operand has 307 places, 874 transitions, 22163 flow. Second operand 16 states and 3097 transitions. [2023-09-01 11:57:33,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1208 transitions, 30091 flow [2023-09-01 11:57:35,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1208 transitions, 29225 flow, removed 40 selfloop flow, removed 17 redundant places. [2023-09-01 11:57:35,895 INFO L231 Difference]: Finished difference. Result has 307 places, 912 transitions, 22815 flow [2023-09-01 11:57:35,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=21377, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=22815, PETRI_PLACES=307, PETRI_TRANSITIONS=912} [2023-09-01 11:57:35,896 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 282 predicate places. [2023-09-01 11:57:35,896 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 912 transitions, 22815 flow [2023-09-01 11:57:35,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 186.86206896551724) internal successors, (5419), 29 states have internal predecessors, (5419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:35,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:35,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:57:35,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 11:57:36,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:36,097 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:36,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:36,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1698496599, now seen corresponding path program 4 times [2023-09-01 11:57:36,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:36,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731439957] [2023-09-01 11:57:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:36,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:57:36,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:36,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731439957] [2023-09-01 11:57:36,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731439957] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:57:36,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624731778] [2023-09-01 11:57:36,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:57:36,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:36,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:57:36,283 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:57:36,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 11:57:36,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:57:36,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:57:36,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 11:57:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:57:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:57:36,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:57:36,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:36,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-09-01 11:57:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:57:36,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624731778] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:57:36,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:57:36,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-09-01 11:57:36,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592707080] [2023-09-01 11:57:36,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:57:36,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:57:36,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:36,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:57:36,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-09-01 11:57:38,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-09-01 11:57:38,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 912 transitions, 22815 flow. Second operand has 25 states, 25 states have (on average 186.96) internal successors, (4674), 25 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:38,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:38,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-09-01 11:57:38,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:41,484 INFO L130 PetriNetUnfolder]: 4886/9586 cut-off events. [2023-09-01 11:57:41,484 INFO L131 PetriNetUnfolder]: For 293193/293193 co-relation queries the response was YES. [2023-09-01 11:57:41,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91921 conditions, 9586 events. 4886/9586 cut-off events. For 293193/293193 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 80486 event pairs, 1488 based on Foata normal form. 144/9730 useless extension candidates. Maximal degree in co-relation 91821. Up to 4124 conditions per place. [2023-09-01 11:57:41,594 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 1046 selfloop transitions, 132 changer transitions 19/1197 dead transitions. [2023-09-01 11:57:41,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1197 transitions, 30019 flow [2023-09-01 11:57:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:57:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:57:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2331 transitions. [2023-09-01 11:57:41,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40217391304347827 [2023-09-01 11:57:41,596 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2331 transitions. [2023-09-01 11:57:41,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2331 transitions. [2023-09-01 11:57:41,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:41,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2331 transitions. [2023-09-01 11:57:41,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 194.25) internal successors, (2331), 12 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:41,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:41,600 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 483.0) internal successors, (6279), 13 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:41,600 INFO L175 Difference]: Start difference. First operand has 307 places, 912 transitions, 22815 flow. Second operand 12 states and 2331 transitions. [2023-09-01 11:57:41,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1197 transitions, 30019 flow [2023-09-01 11:57:44,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1197 transitions, 29818 flow, removed 91 selfloop flow, removed 7 redundant places. [2023-09-01 11:57:44,794 INFO L231 Difference]: Finished difference. Result has 316 places, 938 transitions, 23782 flow [2023-09-01 11:57:44,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=22584, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=23782, PETRI_PLACES=316, PETRI_TRANSITIONS=938} [2023-09-01 11:57:44,795 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 291 predicate places. [2023-09-01 11:57:44,795 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 938 transitions, 23782 flow [2023-09-01 11:57:44,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 186.96) internal successors, (4674), 25 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:44,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:44,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:57:44,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-09-01 11:57:45,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-09-01 11:57:45,001 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:45,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash 950430547, now seen corresponding path program 5 times [2023-09-01 11:57:45,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:45,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238222650] [2023-09-01 11:57:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:45,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:57:45,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:45,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238222650] [2023-09-01 11:57:45,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238222650] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:57:45,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718002263] [2023-09-01 11:57:45,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:57:45,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:45,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:57:45,184 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:57:45,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 11:57:45,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:57:45,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:57:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 11:57:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:57:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:57:45,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:57:45,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:45,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 165 [2023-09-01 11:57:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:57:45,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718002263] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:57:45,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:57:45,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-09-01 11:57:45,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166164795] [2023-09-01 11:57:45,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:57:45,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 11:57:45,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:45,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 11:57:45,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-09-01 11:57:46,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 483 [2023-09-01 11:57:46,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 938 transitions, 23782 flow. Second operand has 26 states, 26 states have (on average 186.69230769230768) internal successors, (4854), 26 states have internal predecessors, (4854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:46,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:46,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 483 [2023-09-01 11:57:46,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:50,462 INFO L130 PetriNetUnfolder]: 4729/9325 cut-off events. [2023-09-01 11:57:50,462 INFO L131 PetriNetUnfolder]: For 290224/290224 co-relation queries the response was YES. [2023-09-01 11:57:50,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90586 conditions, 9325 events. 4729/9325 cut-off events. For 290224/290224 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 78230 event pairs, 1757 based on Foata normal form. 62/9387 useless extension candidates. Maximal degree in co-relation 90482. Up to 5425 conditions per place. [2023-09-01 11:57:50,570 INFO L137 encePairwiseOnDemand]: 473/483 looper letters, 982 selfloop transitions, 132 changer transitions 17/1131 dead transitions. [2023-09-01 11:57:50,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 1131 transitions, 28912 flow [2023-09-01 11:57:50,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:57:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:57:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2701 transitions. [2023-09-01 11:57:50,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994380360839988 [2023-09-01 11:57:50,572 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2701 transitions. [2023-09-01 11:57:50,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2701 transitions. [2023-09-01 11:57:50,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:50,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2701 transitions. [2023-09-01 11:57:50,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 192.92857142857142) internal successors, (2701), 14 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:50,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:50,576 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:50,576 INFO L175 Difference]: Start difference. First operand has 316 places, 938 transitions, 23782 flow. Second operand 14 states and 2701 transitions. [2023-09-01 11:57:50,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 1131 transitions, 28912 flow [2023-09-01 11:57:53,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1131 transitions, 28789 flow, removed 55 selfloop flow, removed 6 redundant places. [2023-09-01 11:57:53,948 INFO L231 Difference]: Finished difference. Result has 324 places, 934 transitions, 23993 flow [2023-09-01 11:57:53,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=23620, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=933, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23993, PETRI_PLACES=324, PETRI_TRANSITIONS=934} [2023-09-01 11:57:53,949 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 299 predicate places. [2023-09-01 11:57:53,949 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 934 transitions, 23993 flow [2023-09-01 11:57:53,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 186.69230769230768) internal successors, (4854), 26 states have internal predecessors, (4854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:53,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:53,950 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] [2023-09-01 11:57:53,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-09-01 11:57:54,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:54,153 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:54,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:54,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1122305270, now seen corresponding path program 11 times [2023-09-01 11:57:54,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:54,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342660410] [2023-09-01 11:57:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:54,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:57:54,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:54,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342660410] [2023-09-01 11:57:54,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342660410] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:57:54,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:57:54,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:57:54,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715063876] [2023-09-01 11:57:54,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:57:54,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:57:54,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:54,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:57:54,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:57:54,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 483 [2023-09-01 11:57:54,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 934 transitions, 23993 flow. Second operand has 11 states, 11 states have (on average 190.9090909090909) internal successors, (2100), 11 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:54,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:54,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 483 [2023-09-01 11:57:54,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:57,810 INFO L130 PetriNetUnfolder]: 4650/9161 cut-off events. [2023-09-01 11:57:57,810 INFO L131 PetriNetUnfolder]: For 281924/281924 co-relation queries the response was YES. [2023-09-01 11:57:57,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88553 conditions, 9161 events. 4650/9161 cut-off events. For 281924/281924 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 76691 event pairs, 1779 based on Foata normal form. 30/9191 useless extension candidates. Maximal degree in co-relation 88448. Up to 8294 conditions per place. [2023-09-01 11:57:57,942 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 771 selfloop transitions, 157 changer transitions 11/939 dead transitions. [2023-09-01 11:57:57,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 939 transitions, 25784 flow [2023-09-01 11:57:57,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:57:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:57:57,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1749 transitions. [2023-09-01 11:57:57,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023464458247067 [2023-09-01 11:57:57,943 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1749 transitions. [2023-09-01 11:57:57,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1749 transitions. [2023-09-01 11:57:57,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:57,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1749 transitions. [2023-09-01 11:57:57,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:57,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:57,946 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 483.0) internal successors, (4830), 10 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:57,946 INFO L175 Difference]: Start difference. First operand has 324 places, 934 transitions, 23993 flow. Second operand 9 states and 1749 transitions. [2023-09-01 11:57:57,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 939 transitions, 25784 flow [2023-09-01 11:58:01,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 939 transitions, 25747 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-09-01 11:58:01,313 INFO L231 Difference]: Finished difference. Result has 324 places, 912 transitions, 23837 flow [2023-09-01 11:58:01,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=23634, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23837, PETRI_PLACES=324, PETRI_TRANSITIONS=912} [2023-09-01 11:58:01,314 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 299 predicate places. [2023-09-01 11:58:01,314 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 912 transitions, 23837 flow [2023-09-01 11:58:01,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 190.9090909090909) internal successors, (2100), 11 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:01,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:01,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:01,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-09-01 11:58:01,315 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:01,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:01,315 INFO L85 PathProgramCache]: Analyzing trace with hash -858824887, now seen corresponding path program 6 times [2023-09-01 11:58:01,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:01,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263489066] [2023-09-01 11:58:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:01,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:58:01,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:01,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263489066] [2023-09-01 11:58:01,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263489066] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:01,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725577842] [2023-09-01 11:58:01,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:58:01,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:01,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:01,436 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:01,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-09-01 11:58:01,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 11:58:01,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:58:01,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 11:58:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:58:01,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:58:01,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725577842] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:01,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:01,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-09-01 11:58:01,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424820900] [2023-09-01 11:58:01,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:01,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 11:58:01,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:01,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 11:58:01,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:58:02,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 483 [2023-09-01 11:58:02,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 912 transitions, 23837 flow. Second operand has 22 states, 22 states have (on average 192.86363636363637) internal successors, (4243), 22 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:02,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:02,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 483 [2023-09-01 11:58:02,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:05,721 INFO L130 PetriNetUnfolder]: 4617/9057 cut-off events. [2023-09-01 11:58:05,721 INFO L131 PetriNetUnfolder]: For 284913/284913 co-relation queries the response was YES. [2023-09-01 11:58:05,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88462 conditions, 9057 events. 4617/9057 cut-off events. For 284913/284913 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 74981 event pairs, 935 based on Foata normal form. 13/9070 useless extension candidates. Maximal degree in co-relation 88357. Up to 3298 conditions per place. [2023-09-01 11:58:05,847 INFO L137 encePairwiseOnDemand]: 474/483 looper letters, 904 selfloop transitions, 192 changer transitions 14/1110 dead transitions. [2023-09-01 11:58:05,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1110 transitions, 29337 flow [2023-09-01 11:58:05,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:58:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:58:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2793 transitions. [2023-09-01 11:58:05,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2023-09-01 11:58:05,850 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2793 transitions. [2023-09-01 11:58:05,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2793 transitions. [2023-09-01 11:58:05,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:05,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2793 transitions. [2023-09-01 11:58:05,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 199.5) internal successors, (2793), 14 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:05,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:05,855 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 483.0) internal successors, (7245), 15 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:05,855 INFO L175 Difference]: Start difference. First operand has 324 places, 912 transitions, 23837 flow. Second operand 14 states and 2793 transitions. [2023-09-01 11:58:05,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1110 transitions, 29337 flow [2023-09-01 11:58:08,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1110 transitions, 28782 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-09-01 11:58:08,891 INFO L231 Difference]: Finished difference. Result has 317 places, 913 transitions, 23823 flow [2023-09-01 11:58:08,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=23301, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23823, PETRI_PLACES=317, PETRI_TRANSITIONS=913} [2023-09-01 11:58:08,892 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 292 predicate places. [2023-09-01 11:58:08,892 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 913 transitions, 23823 flow [2023-09-01 11:58:08,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 192.86363636363637) internal successors, (4243), 22 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:08,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:08,893 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:08,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-09-01 11:58:09,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-09-01 11:58:09,099 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:09,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:09,099 INFO L85 PathProgramCache]: Analyzing trace with hash -921077659, now seen corresponding path program 1 times [2023-09-01 11:58:09,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:09,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186902946] [2023-09-01 11:58:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:09,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:58:09,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186902946] [2023-09-01 11:58:09,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186902946] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855184839] [2023-09-01 11:58:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:09,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:09,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:09,165 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:09,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-09-01 11:58:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:09,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 11:58:09,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:58:09,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:58:09,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855184839] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:09,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:09,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-09-01 11:58:09,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357759762] [2023-09-01 11:58:09,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:09,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 11:58:09,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:09,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 11:58:09,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-09-01 11:58:09,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 483 [2023-09-01 11:58:09,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 913 transitions, 23823 flow. Second operand has 16 states, 16 states have (on average 195.1875) internal successors, (3123), 16 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:09,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:09,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 483 [2023-09-01 11:58:09,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:11,348 INFO L130 PetriNetUnfolder]: 1707/3387 cut-off events. [2023-09-01 11:58:11,348 INFO L131 PetriNetUnfolder]: For 122695/122695 co-relation queries the response was YES. [2023-09-01 11:58:11,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35548 conditions, 3387 events. 1707/3387 cut-off events. For 122695/122695 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23374 event pairs, 502 based on Foata normal form. 126/3513 useless extension candidates. Maximal degree in co-relation 35443. Up to 1911 conditions per place. [2023-09-01 11:58:11,382 INFO L137 encePairwiseOnDemand]: 475/483 looper letters, 317 selfloop transitions, 6 changer transitions 261/584 dead transitions. [2023-09-01 11:58:11,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 584 transitions, 15219 flow [2023-09-01 11:58:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:58:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:58:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3379 transitions. [2023-09-01 11:58:11,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115211301912069 [2023-09-01 11:58:11,385 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3379 transitions. [2023-09-01 11:58:11,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3379 transitions. [2023-09-01 11:58:11,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:11,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3379 transitions. [2023-09-01 11:58:11,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 198.76470588235293) internal successors, (3379), 17 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:11,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 483.0) internal successors, (8694), 18 states have internal predecessors, (8694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:11,391 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 483.0) internal successors, (8694), 18 states have internal predecessors, (8694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:11,391 INFO L175 Difference]: Start difference. First operand has 317 places, 913 transitions, 23823 flow. Second operand 17 states and 3379 transitions. [2023-09-01 11:58:11,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 584 transitions, 15219 flow [2023-09-01 11:58:12,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 584 transitions, 14462 flow, removed 77 selfloop flow, removed 21 redundant places. [2023-09-01 11:58:12,079 INFO L231 Difference]: Finished difference. Result has 310 places, 323 transitions, 6985 flow [2023-09-01 11:58:12,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11784, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6985, PETRI_PLACES=310, PETRI_TRANSITIONS=323} [2023-09-01 11:58:12,080 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 285 predicate places. [2023-09-01 11:58:12,081 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 323 transitions, 6985 flow [2023-09-01 11:58:12,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 195.1875) internal successors, (3123), 16 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:12,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:12,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:12,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-09-01 11:58:12,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:12,287 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:12,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:12,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1369840006, now seen corresponding path program 7 times [2023-09-01 11:58:12,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:12,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797942396] [2023-09-01 11:58:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:58:12,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:12,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797942396] [2023-09-01 11:58:12,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797942396] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:12,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933432246] [2023-09-01 11:58:12,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:58:12,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:12,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:12,851 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:12,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-09-01 11:58:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:12,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 11:58:12,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:58:13,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:13,551 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:58:13,551 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 20 treesize of output 4 [2023-09-01 11:58:13,587 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-09-01 11:58:13,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 62 [2023-09-01 11:58:13,606 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:58:13,607 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 16 treesize of output 4 [2023-09-01 11:58:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:58:13,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933432246] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:13,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:13,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-09-01 11:58:13,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381852532] [2023-09-01 11:58:13,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:13,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-09-01 11:58:13,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-09-01 11:58:13,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2023-09-01 11:58:17,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 483 [2023-09-01 11:58:17,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 323 transitions, 6985 flow. Second operand has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:17,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:17,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 483 [2023-09-01 11:58:17,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:19,716 INFO L130 PetriNetUnfolder]: 2935/5183 cut-off events. [2023-09-01 11:58:19,717 INFO L131 PetriNetUnfolder]: For 161325/161325 co-relation queries the response was YES. [2023-09-01 11:58:19,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51123 conditions, 5183 events. 2935/5183 cut-off events. For 161325/161325 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34504 event pairs, 296 based on Foata normal form. 136/5319 useless extension candidates. Maximal degree in co-relation 51024. Up to 1637 conditions per place. [2023-09-01 11:58:19,782 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 652 selfloop transitions, 279 changer transitions 0/931 dead transitions. [2023-09-01 11:58:19,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 931 transitions, 20925 flow [2023-09-01 11:58:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 11:58:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 11:58:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4564 transitions. [2023-09-01 11:58:19,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3779710144927536 [2023-09-01 11:58:19,785 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4564 transitions. [2023-09-01 11:58:19,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4564 transitions. [2023-09-01 11:58:19,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:19,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4564 transitions. [2023-09-01 11:58:19,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 182.56) internal successors, (4564), 25 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:19,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 483.0) internal successors, (12558), 26 states have internal predecessors, (12558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:19,793 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 483.0) internal successors, (12558), 26 states have internal predecessors, (12558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:19,793 INFO L175 Difference]: Start difference. First operand has 310 places, 323 transitions, 6985 flow. Second operand 25 states and 4564 transitions. [2023-09-01 11:58:19,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 931 transitions, 20925 flow [2023-09-01 11:58:20,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 931 transitions, 19688 flow, removed 416 selfloop flow, removed 46 redundant places. [2023-09-01 11:58:20,654 INFO L231 Difference]: Finished difference. Result has 241 places, 501 transitions, 11468 flow [2023-09-01 11:58:20,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=6561, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11468, PETRI_PLACES=241, PETRI_TRANSITIONS=501} [2023-09-01 11:58:20,655 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 216 predicate places. [2023-09-01 11:58:20,655 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 501 transitions, 11468 flow [2023-09-01 11:58:20,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:20,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:20,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:20,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-09-01 11:58:20,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-09-01 11:58:20,861 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:20,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:20,862 INFO L85 PathProgramCache]: Analyzing trace with hash 10466820, now seen corresponding path program 8 times [2023-09-01 11:58:20,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:20,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457596771] [2023-09-01 11:58:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:20,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:58:21,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:21,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457596771] [2023-09-01 11:58:21,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457596771] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:21,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166074956] [2023-09-01 11:58:21,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:58:21,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:21,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:21,357 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:21,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-09-01 11:58:21,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:58:21,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:58:21,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 11:58:21,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:58:21,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:22,213 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:58:22,213 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 20 treesize of output 4 [2023-09-01 11:58:22,260 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-09-01 11:58:22,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 62 [2023-09-01 11:58:22,294 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:58:22,295 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 16 treesize of output 4 [2023-09-01 11:58:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:58:22,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166074956] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:22,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:22,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-09-01 11:58:22,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846171742] [2023-09-01 11:58:22,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:22,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-09-01 11:58:22,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:22,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-09-01 11:58:22,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2023-09-01 11:58:26,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 483 [2023-09-01 11:58:26,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 501 transitions, 11468 flow. Second operand has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:26,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:26,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 483 [2023-09-01 11:58:26,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:29,008 INFO L130 PetriNetUnfolder]: 3063/5419 cut-off events. [2023-09-01 11:58:29,009 INFO L131 PetriNetUnfolder]: For 126918/126918 co-relation queries the response was YES. [2023-09-01 11:58:29,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50204 conditions, 5419 events. 3063/5419 cut-off events. For 126918/126918 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36548 event pairs, 457 based on Foata normal form. 52/5471 useless extension candidates. Maximal degree in co-relation 50126. Up to 1677 conditions per place. [2023-09-01 11:58:29,098 INFO L137 encePairwiseOnDemand]: 469/483 looper letters, 541 selfloop transitions, 397 changer transitions 0/938 dead transitions. [2023-09-01 11:58:29,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 938 transitions, 21845 flow [2023-09-01 11:58:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 11:58:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 11:58:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6313 transitions. [2023-09-01 11:58:29,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3734398107068915 [2023-09-01 11:58:29,102 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6313 transitions. [2023-09-01 11:58:29,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6313 transitions. [2023-09-01 11:58:29,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:29,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6313 transitions. [2023-09-01 11:58:29,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 180.37142857142857) internal successors, (6313), 35 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:29,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 483.0) internal successors, (17388), 36 states have internal predecessors, (17388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:29,113 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 483.0) internal successors, (17388), 36 states have internal predecessors, (17388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:29,113 INFO L175 Difference]: Start difference. First operand has 241 places, 501 transitions, 11468 flow. Second operand 35 states and 6313 transitions. [2023-09-01 11:58:29,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 938 transitions, 21845 flow [2023-09-01 11:58:29,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 938 transitions, 21685 flow, removed 72 selfloop flow, removed 6 redundant places. [2023-09-01 11:58:29,882 INFO L231 Difference]: Finished difference. Result has 282 places, 659 transitions, 15971 flow [2023-09-01 11:58:29,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=11376, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15971, PETRI_PLACES=282, PETRI_TRANSITIONS=659} [2023-09-01 11:58:29,883 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 257 predicate places. [2023-09-01 11:58:29,883 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 659 transitions, 15971 flow [2023-09-01 11:58:29,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 176.55) internal successors, (7062), 40 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:29,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:29,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:29,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-09-01 11:58:30,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-09-01 11:58:30,085 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:30,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash -779428774, now seen corresponding path program 9 times [2023-09-01 11:58:30,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:30,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569937939] [2023-09-01 11:58:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:30,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:58:30,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:30,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569937939] [2023-09-01 11:58:30,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569937939] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:30,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908838807] [2023-09-01 11:58:30,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:58:30,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:30,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:30,603 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:30,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-09-01 11:58:30,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 11:58:30,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:58:30,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 59 conjunts are in the unsatisfiable core [2023-09-01 11:58:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:30,924 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 13 treesize of output 9 [2023-09-01 11:58:30,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:58:31,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:58:31,490 INFO L321 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-09-01 11:58:31,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 154 [2023-09-01 11:58:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:58:31,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:32,647 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (+ c_~a1~0.offset 4)) (.cse7 (+ 4 c_~a2~0.offset))) (let ((.cse0 (forall ((~a1~0.base Int) (v_ArrVal_2194 (Array Int Int))) (not (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2194))) (= (select (select .cse9 ~a1~0.base) .cse6) (select (select .cse9 c_~a2~0.base) .cse7))))))) (and (or (<= c_~n2~0 c_~n1~0) .cse0) (or (<= c_~n1~0 c_~n2~0) .cse0) (forall ((~a1~0.base Int) (v_ArrVal_2194 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2194))) (let ((.cse3 (select .cse8 ~a1~0.base)) (.cse5 (select .cse8 c_~a2~0.base))) (or (forall ((|v_thread2Thread1of1ForFork1_~i~1#1_148| Int)) (let ((.cse4 (* |v_thread2Thread1of1ForFork1_~i~1#1_148| 4))) (let ((.cse2 (select .cse5 (+ .cse4 c_~a2~0.offset))) (.cse1 (select .cse3 (+ .cse4 c_~a1~0.offset)))) (or (= .cse1 .cse2) (<= c_~n1~0 |v_thread2Thread1of1ForFork1_~i~1#1_148|) (< (+ 2147483647 .cse1) .cse2) (<= c_~n2~0 |v_thread2Thread1of1ForFork1_~i~1#1_148|) (< |v_thread2Thread1of1ForFork1_~i~1#1_148| 1) (< (+ 2147483648 .cse2) .cse1))))) (not (= (select .cse3 .cse6) (select .cse5 .cse7)))))))))) is different from false [2023-09-01 11:58:32,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:32,890 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 222 treesize of output 138 [2023-09-01 11:58:32,940 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-09-01 11:58:32,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1638 treesize of output 1442 [2023-09-01 11:58:32,966 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:58:32,967 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:58:32,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:32,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1398 treesize of output 1090 [2023-09-01 11:58:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:58:33,023 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:58:33,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:33,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1046 treesize of output 914 [2023-09-01 11:58:36,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:36,615 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 52 treesize of output 41 [2023-09-01 11:58:36,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:36,626 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 726 treesize of output 642 [2023-09-01 11:58:36,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:36,648 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 310 treesize of output 255 [2023-09-01 11:58:36,661 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:36,661 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 246 treesize of output 223 [2023-09-01 11:58:36,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:36,780 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 52 treesize of output 41 [2023-09-01 11:58:36,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:36,792 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 726 treesize of output 642 [2023-09-01 11:58:36,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:36,815 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 310 treesize of output 255 [2023-09-01 11:58:36,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:36,828 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 246 treesize of output 223 [2023-09-01 11:58:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:58:37,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908838807] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:37,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:37,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 43 [2023-09-01 11:58:37,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084449771] [2023-09-01 11:58:37,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:37,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 11:58:37,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:37,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 11:58:37,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1599, Unknown=2, NotChecked=82, Total=1892 [2023-09-01 11:58:37,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 483 [2023-09-01 11:58:37,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 659 transitions, 15971 flow. Second operand has 44 states, 44 states have (on average 131.52272727272728) internal successors, (5787), 44 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:37,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:37,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 483 [2023-09-01 11:58:37,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:49,115 INFO L130 PetriNetUnfolder]: 5545/9772 cut-off events. [2023-09-01 11:58:49,115 INFO L131 PetriNetUnfolder]: For 276771/276771 co-relation queries the response was YES. [2023-09-01 11:58:49,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95920 conditions, 9772 events. 5545/9772 cut-off events. For 276771/276771 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 73025 event pairs, 576 based on Foata normal form. 161/9933 useless extension candidates. Maximal degree in co-relation 95829. Up to 2909 conditions per place. [2023-09-01 11:58:49,247 INFO L137 encePairwiseOnDemand]: 466/483 looper letters, 862 selfloop transitions, 734 changer transitions 76/1672 dead transitions. [2023-09-01 11:58:49,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 1672 transitions, 40351 flow [2023-09-01 11:58:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-09-01 11:58:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-09-01 11:58:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 8933 transitions. [2023-09-01 11:58:49,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2802246063115628 [2023-09-01 11:58:49,254 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 8933 transitions. [2023-09-01 11:58:49,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 8933 transitions. [2023-09-01 11:58:49,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:49,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 8933 transitions. [2023-09-01 11:58:49,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 135.34848484848484) internal successors, (8933), 66 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:49,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 483.0) internal successors, (32361), 67 states have internal predecessors, (32361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:49,274 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 483.0) internal successors, (32361), 67 states have internal predecessors, (32361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:49,274 INFO L175 Difference]: Start difference. First operand has 282 places, 659 transitions, 15971 flow. Second operand 66 states and 8933 transitions. [2023-09-01 11:58:49,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 1672 transitions, 40351 flow [2023-09-01 11:58:52,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1672 transitions, 39576 flow, removed 223 selfloop flow, removed 15 redundant places. [2023-09-01 11:58:52,406 INFO L231 Difference]: Finished difference. Result has 359 places, 1119 transitions, 28193 flow [2023-09-01 11:58:52,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=15461, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=28193, PETRI_PLACES=359, PETRI_TRANSITIONS=1119} [2023-09-01 11:58:52,407 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 334 predicate places. [2023-09-01 11:58:52,407 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 1119 transitions, 28193 flow [2023-09-01 11:58:52,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 131.52272727272728) internal successors, (5787), 44 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:52,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:52,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:52,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-09-01 11:58:52,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:52,609 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:52,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:52,609 INFO L85 PathProgramCache]: Analyzing trace with hash 875882456, now seen corresponding path program 10 times [2023-09-01 11:58:52,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:52,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182935104] [2023-09-01 11:58:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:52,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:58:53,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:53,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182935104] [2023-09-01 11:58:53,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182935104] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:53,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983757816] [2023-09-01 11:58:53,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:58:53,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:53,201 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:53,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-09-01 11:58:53,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:58:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:58:53,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:58:53,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:58:53,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:54,071 INFO L321 Elim1Store]: treesize reduction 13, result has 93.4 percent of original size [2023-09-01 11:58:54,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 119 treesize of output 218 [2023-09-01 11:58:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:58:55,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983757816] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:55,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:55,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 31 [2023-09-01 11:58:55,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027729066] [2023-09-01 11:58:55,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:55,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 11:58:55,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 11:58:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2023-09-01 11:58:58,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 483 [2023-09-01 11:58:58,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1119 transitions, 28193 flow. Second operand has 31 states, 31 states have (on average 177.90322580645162) internal successors, (5515), 31 states have internal predecessors, (5515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:58,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:58,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 483 [2023-09-01 11:58:58,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:01,691 INFO L130 PetriNetUnfolder]: 5222/9254 cut-off events. [2023-09-01 11:59:01,691 INFO L131 PetriNetUnfolder]: For 394010/394010 co-relation queries the response was YES. [2023-09-01 11:59:01,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102732 conditions, 9254 events. 5222/9254 cut-off events. For 394010/394010 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 69053 event pairs, 1247 based on Foata normal form. 116/9370 useless extension candidates. Maximal degree in co-relation 102614. Up to 5923 conditions per place. [2023-09-01 11:59:01,830 INFO L137 encePairwiseOnDemand]: 470/483 looper letters, 779 selfloop transitions, 402 changer transitions 5/1186 dead transitions. [2023-09-01 11:59:01,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1186 transitions, 31900 flow [2023-09-01 11:59:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:59:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:59:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2721 transitions. [2023-09-01 11:59:01,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3755693581780538 [2023-09-01 11:59:01,833 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2721 transitions. [2023-09-01 11:59:01,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2721 transitions. [2023-09-01 11:59:01,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:01,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2721 transitions. [2023-09-01 11:59:01,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 181.4) internal successors, (2721), 15 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:01,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:01,838 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 483.0) internal successors, (7728), 16 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:01,838 INFO L175 Difference]: Start difference. First operand has 359 places, 1119 transitions, 28193 flow. Second operand 15 states and 2721 transitions. [2023-09-01 11:59:01,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1186 transitions, 31900 flow [2023-09-01 11:59:06,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1186 transitions, 30966 flow, removed 388 selfloop flow, removed 18 redundant places. [2023-09-01 11:59:06,520 INFO L231 Difference]: Finished difference. Result has 349 places, 1120 transitions, 28256 flow [2023-09-01 11:59:06,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=27353, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=28256, PETRI_PLACES=349, PETRI_TRANSITIONS=1120} [2023-09-01 11:59:06,521 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 324 predicate places. [2023-09-01 11:59:06,521 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1120 transitions, 28256 flow [2023-09-01 11:59:06,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 177.90322580645162) internal successors, (5515), 31 states have internal predecessors, (5515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:06,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:06,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:06,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-09-01 11:59:06,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-09-01 11:59:06,722 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:59:06,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash -357005494, now seen corresponding path program 11 times [2023-09-01 11:59:06,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:06,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367249756] [2023-09-01 11:59:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:06,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:59:07,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:07,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367249756] [2023-09-01 11:59:07,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367249756] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:07,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459861300] [2023-09-01 11:59:07,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:59:07,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:07,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:07,545 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:59:07,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-09-01 11:59:07,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 11:59:07,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:07,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 11:59:07,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:59:08,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:08,330 INFO L321 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-09-01 11:59:08,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 193 [2023-09-01 11:59:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:59:08,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459861300] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:59:08,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:59:08,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 27 [2023-09-01 11:59:08,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440233919] [2023-09-01 11:59:08,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:59:08,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 11:59:08,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:08,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 11:59:08,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-09-01 11:59:11,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 483 [2023-09-01 11:59:11,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1120 transitions, 28256 flow. Second operand has 27 states, 27 states have (on average 177.0) internal successors, (4779), 27 states have internal predecessors, (4779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:11,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:11,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 483 [2023-09-01 11:59:11,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:15,611 INFO L130 PetriNetUnfolder]: 5992/10828 cut-off events. [2023-09-01 11:59:15,612 INFO L131 PetriNetUnfolder]: For 433311/433311 co-relation queries the response was YES. [2023-09-01 11:59:15,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116377 conditions, 10828 events. 5992/10828 cut-off events. For 433311/433311 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 83873 event pairs, 1261 based on Foata normal form. 288/11116 useless extension candidates. Maximal degree in co-relation 116265. Up to 6416 conditions per place. [2023-09-01 11:59:15,769 INFO L137 encePairwiseOnDemand]: 472/483 looper letters, 999 selfloop transitions, 388 changer transitions 0/1387 dead transitions. [2023-09-01 11:59:15,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1387 transitions, 36552 flow [2023-09-01 11:59:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 11:59:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 11:59:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3268 transitions. [2023-09-01 11:59:15,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37589141936968024 [2023-09-01 11:59:15,771 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3268 transitions. [2023-09-01 11:59:15,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3268 transitions. [2023-09-01 11:59:15,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:15,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3268 transitions. [2023-09-01 11:59:15,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 181.55555555555554) internal successors, (3268), 18 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:15,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 483.0) internal successors, (9177), 19 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:15,777 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 483.0) internal successors, (9177), 19 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:15,777 INFO L175 Difference]: Start difference. First operand has 349 places, 1120 transitions, 28256 flow. Second operand 18 states and 3268 transitions. [2023-09-01 11:59:15,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1387 transitions, 36552 flow [2023-09-01 11:59:20,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1387 transitions, 35405 flow, removed 33 selfloop flow, removed 11 redundant places. [2023-09-01 11:59:20,655 INFO L231 Difference]: Finished difference. Result has 363 places, 1225 transitions, 31287 flow [2023-09-01 11:59:20,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=483, PETRI_DIFFERENCE_MINUEND_FLOW=27272, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=31287, PETRI_PLACES=363, PETRI_TRANSITIONS=1225} [2023-09-01 11:59:20,656 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 338 predicate places. [2023-09-01 11:59:20,656 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1225 transitions, 31287 flow [2023-09-01 11:59:20,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.0) internal successors, (4779), 27 states have internal predecessors, (4779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:20,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:20,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:20,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-09-01 11:59:20,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:20,857 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:59:20,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1857435442, now seen corresponding path program 12 times [2023-09-01 11:59:20,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:20,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558587672] [2023-09-01 11:59:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:20,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:59:21,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:21,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558587672] [2023-09-01 11:59:21,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558587672] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:21,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699504662] [2023-09-01 11:59:21,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:59:21,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:21,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:21,439 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:59:21,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-09-01 11:59:21,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:59:21,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:21,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 11:59:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:59:22,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:22,802 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:59:22,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 64 [2023-09-01 11:59:22,857 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:59:22,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 64 [2023-09-01 11:59:22,882 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:59:22,882 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 20 treesize of output 4 [2023-09-01 11:59:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:59:23,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699504662] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:59:23,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:59:23,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 32 [2023-09-01 11:59:23,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249880733] [2023-09-01 11:59:23,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:59:23,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 11:59:23,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:23,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 11:59:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2023-09-01 11:59:27,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 483 [2023-09-01 11:59:27,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1225 transitions, 31287 flow. Second operand has 32 states, 32 states have (on average 171.125) internal successors, (5476), 32 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:27,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:27,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 483 [2023-09-01 11:59:27,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:47,480 INFO L130 PetriNetUnfolder]: 11221/20173 cut-off events. [2023-09-01 11:59:47,480 INFO L131 PetriNetUnfolder]: For 906641/906641 co-relation queries the response was YES. [2023-09-01 11:59:47,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227912 conditions, 20173 events. 11221/20173 cut-off events. For 906641/906641 co-relation queries the response was YES. Maximal size of possible extension queue 1291. Compared 172157 event pairs, 416 based on Foata normal form. 414/20587 useless extension candidates. Maximal degree in co-relation 227792. Up to 5983 conditions per place. [2023-09-01 11:59:47,813 INFO L137 encePairwiseOnDemand]: 467/483 looper letters, 1458 selfloop transitions, 1576 changer transitions 71/3105 dead transitions. [2023-09-01 11:59:47,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 3105 transitions, 77912 flow [2023-09-01 11:59:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-09-01 11:59:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2023-09-01 11:59:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 20550 transitions. [2023-09-01 11:59:47,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36364601581992884 [2023-09-01 11:59:47,824 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 20550 transitions. [2023-09-01 11:59:47,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 20550 transitions. [2023-09-01 11:59:47,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:47,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 20550 transitions. [2023-09-01 11:59:47,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 175.64102564102564) internal successors, (20550), 117 states have internal predecessors, (20550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 483.0) internal successors, (56994), 118 states have internal predecessors, (56994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,949 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 483.0) internal successors, (56994), 118 states have internal predecessors, (56994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,950 INFO L175 Difference]: Start difference. First operand has 363 places, 1225 transitions, 31287 flow. Second operand 117 states and 20550 transitions. [2023-09-01 11:59:47,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 3105 transitions, 77912 flow Killed by 15