./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:51:42,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:51:42,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:51:42,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:51:42,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:51:42,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:51:42,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:51:42,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:51:42,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:51:42,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:51:42,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:51:42,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:51:42,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:51:42,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:51:42,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:51:42,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:51:42,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:51:42,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:51:42,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:51:42,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:51:42,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:51:42,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:51:42,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:51:42,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:51:42,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:51:42,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:51:42,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:51:42,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:51:42,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:51:42,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:51:42,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:51:42,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:51:42,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:51:42,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:51:42,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:51:42,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:51:42,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:51:42,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:51:42,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:51:42,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:51:42,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:51:42,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:51:42,471 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:51:42,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:51:42,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:51:42,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:51:42,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:51:42,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:51:42,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:51:42,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:51:42,475 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:51:42,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:51:42,476 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:51:42,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:51:42,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:51:42,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:51:42,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:51:42,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:51:42,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:51:42,477 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:51:42,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:51:42,477 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:51:42,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:51:42,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:51:42,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:51:42,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:51:42,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:51:42,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:51:42,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:51:42,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:51:42,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:51:42,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:51:42,480 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:51:42,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:51:42,480 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:51:42,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:51:42,480 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:51:42,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:51:42,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:51:42,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:51:42,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:51:42,820 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:51:42,820 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:51:42,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-30 18:51:44,022 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:51:44,210 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:51:44,211 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-30 18:51:44,216 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccc7f3d5/8fea620c9d844d5099971aadf1f46096/FLAG188b181f4 [2023-08-30 18:51:44,227 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccc7f3d5/8fea620c9d844d5099971aadf1f46096 [2023-08-30 18:51:44,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:51:44,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:51:44,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:51:44,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:51:44,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:51:44,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368ebeb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44, skipping insertion in model container [2023-08-30 18:51:44,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:51:44,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:51:44,451 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-chromosome-symm.wvr.c[2695,2708] [2023-08-30 18:51:44,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:51:44,477 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:51:44,511 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-chromosome-symm.wvr.c[2695,2708] [2023-08-30 18:51:44,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:51:44,536 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:51:44,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44 WrapperNode [2023-08-30 18:51:44,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:51:44,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:51:44,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:51:44,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:51:44,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,596 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 198 [2023-08-30 18:51:44,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:51:44,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:51:44,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:51:44,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:51:44,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,638 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:51:44,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:51:44,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:51:44,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:51:44,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (1/1) ... [2023-08-30 18:51:44,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:51:44,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:51:44,675 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 18:51:44,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 18:51:44,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:51:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:51:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:51:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:51:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 18:51:44,710 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 18:51:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 18:51:44,711 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 18:51:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:51:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:51:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:51:44,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:51:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:51:44,713 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 18:51:44,845 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:51:44,847 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:51:45,138 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:51:45,147 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:51:45,147 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 18:51:45,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:51:45 BoogieIcfgContainer [2023-08-30 18:51:45,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:51:45,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:51:45,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:51:45,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:51:45,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:51:44" (1/3) ... [2023-08-30 18:51:45,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9ac837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:51:45, skipping insertion in model container [2023-08-30 18:51:45,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:51:44" (2/3) ... [2023-08-30 18:51:45,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9ac837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:51:45, skipping insertion in model container [2023-08-30 18:51:45,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:51:45" (3/3) ... [2023-08-30 18:51:45,156 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2023-08-30 18:51:45,162 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:51:45,170 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:51:45,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:51:45,171 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:51:45,303 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 18:51:45,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 478 flow [2023-08-30 18:51:45,474 INFO L130 PetriNetUnfolder]: 21/229 cut-off events. [2023-08-30 18:51:45,474 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:51:45,480 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 266 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2023-08-30 18:51:45,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 478 flow [2023-08-30 18:51:45,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 221 transitions, 454 flow [2023-08-30 18:51:45,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:51:45,502 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 221 transitions, 454 flow [2023-08-30 18:51:45,505 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 221 transitions, 454 flow [2023-08-30 18:51:45,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 221 transitions, 454 flow [2023-08-30 18:51:45,554 INFO L130 PetriNetUnfolder]: 21/221 cut-off events. [2023-08-30 18:51:45,554 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:51:45,557 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 269 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2023-08-30 18:51:45,560 INFO L119 LiptonReduction]: Number of co-enabled transitions 5400 [2023-08-30 18:51:51,367 INFO L134 LiptonReduction]: Checked pairs total: 5353 [2023-08-30 18:51:51,368 INFO L136 LiptonReduction]: Total number of compositions: 258 [2023-08-30 18:51:51,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:51:51,385 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;@2c81626b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:51:51,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 18:51:51,392 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-08-30 18:51:51,392 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:51:51,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:51,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:51,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:51,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:51,398 INFO L85 PathProgramCache]: Analyzing trace with hash 659682560, now seen corresponding path program 1 times [2023-08-30 18:51:51,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:51,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333711095] [2023-08-30 18:51:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:51,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:51:51,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:51,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333711095] [2023-08-30 18:51:51,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333711095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:51:51,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:51:51,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:51:51,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527806421] [2023-08-30 18:51:51,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:51,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:51:51,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:51,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:51:51,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:51:51,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 489 [2023-08-30 18:51:51,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:51,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:51,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 489 [2023-08-30 18:51:51,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:51,933 INFO L130 PetriNetUnfolder]: 53/98 cut-off events. [2023-08-30 18:51:51,933 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-30 18:51:51,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 98 events. 53/98 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 190 event pairs, 33 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 97 conditions per place. [2023-08-30 18:51:51,939 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 18 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2023-08-30 18:51:51,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 100 flow [2023-08-30 18:51:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:51:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:51:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-30 18:51:51,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274028629856851 [2023-08-30 18:51:51,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-30 18:51:51,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-30 18:51:51,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:51,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-30 18:51:51,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:51,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:51,980 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:51,982 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 52 flow. Second operand 3 states and 627 transitions. [2023-08-30 18:51:51,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 100 flow [2023-08-30 18:51:51,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 18:51:51,986 INFO L231 Difference]: Finished difference. Result has 22 places, 22 transitions, 66 flow [2023-08-30 18:51:51,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=22} [2023-08-30 18:51:51,993 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-08-30 18:51:51,993 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 22 transitions, 66 flow [2023-08-30 18:51:51,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:51,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:51,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:51,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:51:51,996 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:52,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1043919621, now seen corresponding path program 1 times [2023-08-30 18:51:52,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:52,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817546047] [2023-08-30 18:51:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:52,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:51:52,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:52,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817546047] [2023-08-30 18:51:52,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817546047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:52,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213578490] [2023-08-30 18:51:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:52,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:52,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:51:52,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:51:52,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:51:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 18:51:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:51:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:51:52,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:51:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:51:52,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213578490] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:51:52,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:51:52,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-30 18:51:52,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352675725] [2023-08-30 18:51:52,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:51:52,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 18:51:52,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 18:51:52,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:51:52,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 489 [2023-08-30 18:51:52,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 22 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:52,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:52,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 489 [2023-08-30 18:51:52,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:52,559 INFO L130 PetriNetUnfolder]: 53/104 cut-off events. [2023-08-30 18:51:52,559 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 18:51:52,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 104 events. 53/104 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 187 event pairs, 33 based on Foata normal form. 3/88 useless extension candidates. Maximal degree in co-relation 202. Up to 97 conditions per place. [2023-08-30 18:51:52,560 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 18 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2023-08-30 18:51:52,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 146 flow [2023-08-30 18:51:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:51:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:51:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1216 transitions. [2023-08-30 18:51:52,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41445126107702795 [2023-08-30 18:51:52,564 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1216 transitions. [2023-08-30 18:51:52,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1216 transitions. [2023-08-30 18:51:52,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:52,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1216 transitions. [2023-08-30 18:51:52,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.66666666666666) internal successors, (1216), 6 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:52,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:52,574 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:52,575 INFO L175 Difference]: Start difference. First operand has 22 places, 22 transitions, 66 flow. Second operand 6 states and 1216 transitions. [2023-08-30 18:51:52,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 146 flow [2023-08-30 18:51:52,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:51:52,577 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 128 flow [2023-08-30 18:51:52,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-30 18:51:52,578 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2023-08-30 18:51:52,578 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 128 flow [2023-08-30 18:51:52,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:52,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:52,579 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:52,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 18:51:52,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:52,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:52,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1002026432, now seen corresponding path program 2 times [2023-08-30 18:51:52,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:52,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033294339] [2023-08-30 18:51:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:52,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:51:53,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:53,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033294339] [2023-08-30 18:51:53,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033294339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:53,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155222510] [2023-08-30 18:51:53,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:51:53,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:53,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:51:53,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:51:53,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:51:53,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 18:51:53,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:51:53,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 18:51:53,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:51:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 18:51:53,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:51:53,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155222510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:51:53,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:51:53,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-08-30 18:51:53,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206304595] [2023-08-30 18:51:53,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:53,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:51:53,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:53,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:51:53,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:51:53,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 489 [2023-08-30 18:51:53,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:53,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 489 [2023-08-30 18:51:53,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:53,317 INFO L130 PetriNetUnfolder]: 88/171 cut-off events. [2023-08-30 18:51:53,317 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:51:53,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 171 events. 88/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 478 event pairs, 33 based on Foata normal form. 4/140 useless extension candidates. Maximal degree in co-relation 330. Up to 105 conditions per place. [2023-08-30 18:51:53,319 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 41 selfloop transitions, 3 changer transitions 2/46 dead transitions. [2023-08-30 18:51:53,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 260 flow [2023-08-30 18:51:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:51:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:51:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 855 transitions. [2023-08-30 18:51:53,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371165644171779 [2023-08-30 18:51:53,322 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 855 transitions. [2023-08-30 18:51:53,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 855 transitions. [2023-08-30 18:51:53,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:53,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 855 transitions. [2023-08-30 18:51:53,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.75) internal successors, (855), 4 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,329 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,329 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 128 flow. Second operand 4 states and 855 transitions. [2023-08-30 18:51:53,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 260 flow [2023-08-30 18:51:53,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 244 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:51:53,333 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 132 flow [2023-08-30 18:51:53,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-30 18:51:53,335 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2023-08-30 18:51:53,335 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 132 flow [2023-08-30 18:51:53,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:53,336 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:53,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 18:51:53,543 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,SelfDestructingSolverStorable2 [2023-08-30 18:51:53,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:53,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash 637732292, now seen corresponding path program 3 times [2023-08-30 18:51:53,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:53,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852576308] [2023-08-30 18:51:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:51:53,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:53,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852576308] [2023-08-30 18:51:53,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852576308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:53,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437419090] [2023-08-30 18:51:53,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:51:53,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:53,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:51:53,710 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:51:53,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 18:51:53,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 18:51:53,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:51:53,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 18:51:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:51:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 18:51:53,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:51:53,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437419090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:51:53,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:51:53,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-08-30 18:51:53,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367031913] [2023-08-30 18:51:53,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:53,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:51:53,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:53,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:51:53,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:51:53,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 489 [2023-08-30 18:51:53,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:53,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 489 [2023-08-30 18:51:53,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:53,955 INFO L130 PetriNetUnfolder]: 136/259 cut-off events. [2023-08-30 18:51:53,955 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 18:51:53,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 259 events. 136/259 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 831 event pairs, 60 based on Foata normal form. 2/224 useless extension candidates. Maximal degree in co-relation 602. Up to 176 conditions per place. [2023-08-30 18:51:53,957 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 48 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-30 18:51:53,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 304 flow [2023-08-30 18:51:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:51:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:51:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 854 transitions. [2023-08-30 18:51:53,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43660531697341515 [2023-08-30 18:51:53,960 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 854 transitions. [2023-08-30 18:51:53,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 854 transitions. [2023-08-30 18:51:53,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:53,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 854 transitions. [2023-08-30 18:51:53,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,967 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,968 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 132 flow. Second operand 4 states and 854 transitions. [2023-08-30 18:51:53,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 304 flow [2023-08-30 18:51:53,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:51:53,982 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 150 flow [2023-08-30 18:51:53,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-30 18:51:53,984 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2023-08-30 18:51:53,984 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 150 flow [2023-08-30 18:51:53,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:53,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:53,985 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:53,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 18:51:54,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:54,191 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:54,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:54,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1056425402, now seen corresponding path program 4 times [2023-08-30 18:51:54,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:54,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967312992] [2023-08-30 18:51:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:54,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:51:54,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:54,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967312992] [2023-08-30 18:51:54,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967312992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:54,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490576827] [2023-08-30 18:51:54,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:51:54,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:54,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:51:54,358 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:51:54,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 18:51:54,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:51:54,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:51:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 18:51:54,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:51:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:51:54,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:51:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:51:54,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490576827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:51:54,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:51:54,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 18:51:54,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739494696] [2023-08-30 18:51:54,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:51:54,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:51:54,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:54,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:51:54,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-08-30 18:51:54,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 489 [2023-08-30 18:51:54,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 199.15384615384616) internal successors, (2589), 13 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:54,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:54,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 489 [2023-08-30 18:51:54,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:54,825 INFO L130 PetriNetUnfolder]: 136/261 cut-off events. [2023-08-30 18:51:54,826 INFO L131 PetriNetUnfolder]: For 230/230 co-relation queries the response was YES. [2023-08-30 18:51:54,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 261 events. 136/261 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 791 event pairs, 104 based on Foata normal form. 1/243 useless extension candidates. Maximal degree in co-relation 722. Up to 252 conditions per place. [2023-08-30 18:51:54,827 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 22 selfloop transitions, 12 changer transitions 0/34 dead transitions. [2023-08-30 18:51:54,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 230 flow [2023-08-30 18:51:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:51:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:51:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1411 transitions. [2023-08-30 18:51:54,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41221151037101955 [2023-08-30 18:51:54,832 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1411 transitions. [2023-08-30 18:51:54,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1411 transitions. [2023-08-30 18:51:54,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:54,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1411 transitions. [2023-08-30 18:51:54,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 201.57142857142858) internal successors, (1411), 7 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:54,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 489.0) internal successors, (3912), 8 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) [2023-08-30 18:51:54,841 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 489.0) internal successors, (3912), 8 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) [2023-08-30 18:51:54,841 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 150 flow. Second operand 7 states and 1411 transitions. [2023-08-30 18:51:54,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 230 flow [2023-08-30 18:51:54,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 226 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:51:54,844 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 192 flow [2023-08-30 18:51:54,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-08-30 18:51:54,844 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2023-08-30 18:51:54,845 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 192 flow [2023-08-30 18:51:54,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.15384615384616) internal successors, (2589), 13 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:54,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:54,846 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:54,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 18:51:55,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:55,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:55,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:55,051 INFO L85 PathProgramCache]: Analyzing trace with hash -871821335, now seen corresponding path program 5 times [2023-08-30 18:51:55,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:55,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832438037] [2023-08-30 18:51:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:51:55,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:55,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832438037] [2023-08-30 18:51:55,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832438037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:51:55,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:51:55,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:51:55,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864807331] [2023-08-30 18:51:55,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:55,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:51:55,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:55,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:51:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:51:55,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 489 [2023-08-30 18:51:55,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:55,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:55,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 489 [2023-08-30 18:51:55,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:55,451 INFO L130 PetriNetUnfolder]: 158/299 cut-off events. [2023-08-30 18:51:55,451 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-30 18:51:55,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 856 conditions, 299 events. 158/299 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1083 event pairs, 18 based on Foata normal form. 16/297 useless extension candidates. Maximal degree in co-relation 778. Up to 246 conditions per place. [2023-08-30 18:51:55,453 INFO L137 encePairwiseOnDemand]: 483/489 looper letters, 45 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-30 18:51:55,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 352 flow [2023-08-30 18:51:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:51:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:51:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 846 transitions. [2023-08-30 18:51:55,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325153374233129 [2023-08-30 18:51:55,456 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 846 transitions. [2023-08-30 18:51:55,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 846 transitions. [2023-08-30 18:51:55,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:55,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 846 transitions. [2023-08-30 18:51:55,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:55,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:55,462 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:55,462 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 192 flow. Second operand 4 states and 846 transitions. [2023-08-30 18:51:55,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 352 flow [2023-08-30 18:51:55,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 328 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 18:51:55,465 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 199 flow [2023-08-30 18:51:55,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-08-30 18:51:55,466 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2023-08-30 18:51:55,466 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 199 flow [2023-08-30 18:51:55,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:55,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:55,467 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:55,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 18:51:55,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:55,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:55,468 INFO L85 PathProgramCache]: Analyzing trace with hash -29914819, now seen corresponding path program 6 times [2023-08-30 18:51:55,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:55,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071201551] [2023-08-30 18:51:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:55,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:51:55,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:55,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071201551] [2023-08-30 18:51:55,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071201551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:51:55,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:51:55,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:51:55,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436715518] [2023-08-30 18:51:55,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:55,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:51:55,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:51:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:51:55,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 489 [2023-08-30 18:51:55,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:55,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:55,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 489 [2023-08-30 18:51:55,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:55,787 INFO L130 PetriNetUnfolder]: 160/299 cut-off events. [2023-08-30 18:51:55,788 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-08-30 18:51:55,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 299 events. 160/299 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 976 event pairs, 34 based on Foata normal form. 8/285 useless extension candidates. Maximal degree in co-relation 872. Up to 206 conditions per place. [2023-08-30 18:51:55,790 INFO L137 encePairwiseOnDemand]: 483/489 looper letters, 45 selfloop transitions, 6 changer transitions 1/52 dead transitions. [2023-08-30 18:51:55,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 367 flow [2023-08-30 18:51:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:51:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:51:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 845 transitions. [2023-08-30 18:51:55,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320040899795501 [2023-08-30 18:51:55,793 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 845 transitions. [2023-08-30 18:51:55,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 845 transitions. [2023-08-30 18:51:55,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:55,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 845 transitions. [2023-08-30 18:51:55,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:55,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:55,799 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:55,799 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 199 flow. Second operand 4 states and 845 transitions. [2023-08-30 18:51:55,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 367 flow [2023-08-30 18:51:55,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:51:55,801 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 234 flow [2023-08-30 18:51:55,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-08-30 18:51:55,802 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2023-08-30 18:51:55,802 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 234 flow [2023-08-30 18:51:55,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:55,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:55,803 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:55,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 18:51:55,804 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:55,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash 537168199, now seen corresponding path program 1 times [2023-08-30 18:51:55,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:55,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374662250] [2023-08-30 18:51:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:55,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-30 18:51:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374662250] [2023-08-30 18:51:56,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374662250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:51:56,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:51:56,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:51:56,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661799395] [2023-08-30 18:51:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:56,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:51:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:51:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:51:56,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 489 [2023-08-30 18:51:56,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:56,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:56,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 489 [2023-08-30 18:51:56,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:56,218 INFO L130 PetriNetUnfolder]: 145/270 cut-off events. [2023-08-30 18:51:56,218 INFO L131 PetriNetUnfolder]: For 591/591 co-relation queries the response was YES. [2023-08-30 18:51:56,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 270 events. 145/270 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 847 event pairs, 54 based on Foata normal form. 6/258 useless extension candidates. Maximal degree in co-relation 847. Up to 182 conditions per place. [2023-08-30 18:51:56,220 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 46 selfloop transitions, 6 changer transitions 3/55 dead transitions. [2023-08-30 18:51:56,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 415 flow [2023-08-30 18:51:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:51:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:51:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2023-08-30 18:51:56,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340490797546012 [2023-08-30 18:51:56,223 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2023-08-30 18:51:56,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2023-08-30 18:51:56,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:56,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2023-08-30 18:51:56,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:56,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:56,229 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:56,229 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 234 flow. Second operand 4 states and 849 transitions. [2023-08-30 18:51:56,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 415 flow [2023-08-30 18:51:56,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 408 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:51:56,232 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 257 flow [2023-08-30 18:51:56,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-08-30 18:51:56,233 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-08-30 18:51:56,233 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 257 flow [2023-08-30 18:51:56,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:56,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:56,234 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:56,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 18:51:56,234 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:56,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:56,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1727705847, now seen corresponding path program 1 times [2023-08-30 18:51:56,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:56,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185867887] [2023-08-30 18:51:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:56,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-30 18:51:56,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:56,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185867887] [2023-08-30 18:51:56,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185867887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:51:56,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:51:56,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:51:56,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674384667] [2023-08-30 18:51:56,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:51:56,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:51:56,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:56,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:51:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:51:56,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 489 [2023-08-30 18:51:56,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:56,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:51:56,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 489 [2023-08-30 18:51:56,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:51:56,633 INFO L130 PetriNetUnfolder]: 125/230 cut-off events. [2023-08-30 18:51:56,633 INFO L131 PetriNetUnfolder]: For 663/663 co-relation queries the response was YES. [2023-08-30 18:51:56,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 230 events. 125/230 cut-off events. For 663/663 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 639 event pairs, 51 based on Foata normal form. 12/224 useless extension candidates. Maximal degree in co-relation 757. Up to 177 conditions per place. [2023-08-30 18:51:56,636 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 47 selfloop transitions, 7 changer transitions 1/55 dead transitions. [2023-08-30 18:51:56,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 439 flow [2023-08-30 18:51:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:51:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:51:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 845 transitions. [2023-08-30 18:51:56,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320040899795501 [2023-08-30 18:51:56,639 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 845 transitions. [2023-08-30 18:51:56,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 845 transitions. [2023-08-30 18:51:56,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:51:56,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 845 transitions. [2023-08-30 18:51:56,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:56,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:56,644 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:56,645 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 257 flow. Second operand 4 states and 845 transitions. [2023-08-30 18:51:56,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 439 flow [2023-08-30 18:51:56,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 413 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 18:51:56,648 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 270 flow [2023-08-30 18:51:56,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-30 18:51:56,649 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-08-30 18:51:56,649 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 270 flow [2023-08-30 18:51:56,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:51:56,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:51:56,650 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:51:56,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 18:51:56,650 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:51:56,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:51:56,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1304321571, now seen corresponding path program 1 times [2023-08-30 18:51:56,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:51:56,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43943606] [2023-08-30 18:51:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:56,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:51:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:51:57,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:51:57,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43943606] [2023-08-30 18:51:57,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43943606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:51:57,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717549348] [2023-08-30 18:51:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:51:57,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:51:57,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:51:57,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:51:57,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 18:51:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:51:57,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:51:57,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:51:58,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:51:58,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-30 18:51:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:51:58,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:51:58,943 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:51:58,943 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 42 treesize of output 50 [2023-08-30 18:51:58,982 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:51:58,983 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 34 treesize of output 1 [2023-08-30 18:51:58,987 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:51:58,988 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 34 treesize of output 1 [2023-08-30 18:51:58,992 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:51:58,992 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 34 treesize of output 1 [2023-08-30 18:51:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:51:59,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717549348] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:51:59,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:51:59,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-08-30 18:51:59,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324476136] [2023-08-30 18:51:59,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:51:59,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:51:59,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:51:59,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:51:59,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:52:00,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-30 18:52:00,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 270 flow. Second operand has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:00,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:00,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-30 18:52:00,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:01,702 INFO L130 PetriNetUnfolder]: 233/427 cut-off events. [2023-08-30 18:52:01,702 INFO L131 PetriNetUnfolder]: For 1029/1029 co-relation queries the response was YES. [2023-08-30 18:52:01,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 427 events. 233/427 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1621 event pairs, 12 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 1404. Up to 150 conditions per place. [2023-08-30 18:52:01,706 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 71 selfloop transitions, 26 changer transitions 14/111 dead transitions. [2023-08-30 18:52:01,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 796 flow [2023-08-30 18:52:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:52:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:52:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2745 transitions. [2023-08-30 18:52:01,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37423312883435583 [2023-08-30 18:52:01,715 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2745 transitions. [2023-08-30 18:52:01,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2745 transitions. [2023-08-30 18:52:01,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:01,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2745 transitions. [2023-08-30 18:52:01,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 183.0) internal successors, (2745), 15 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:01,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:01,746 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:01,746 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 270 flow. Second operand 15 states and 2745 transitions. [2023-08-30 18:52:01,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 796 flow [2023-08-30 18:52:01,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 111 transitions, 744 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 18:52:01,752 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 451 flow [2023-08-30 18:52:01,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=451, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-08-30 18:52:01,754 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 48 predicate places. [2023-08-30 18:52:01,754 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 451 flow [2023-08-30 18:52:01,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:01,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:01,755 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:01,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 18:52:01,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 18:52:01,960 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:52:01,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:01,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1278507897, now seen corresponding path program 2 times [2023-08-30 18:52:01,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:01,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693413054] [2023-08-30 18:52:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:01,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:52:02,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:02,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693413054] [2023-08-30 18:52:02,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693413054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:02,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499392327] [2023-08-30 18:52:02,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:52:02,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:02,862 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:52:02,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 18:52:03,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:52:03,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:03,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:52:03,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:03,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:52:03,188 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 27 treesize of output 19 [2023-08-30 18:52:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:52:03,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:52:03,762 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-30 18:52:03,762 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 185 treesize of output 103 [2023-08-30 18:52:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:52:03,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499392327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:52:03,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:52:03,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-08-30 18:52:03,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125447716] [2023-08-30 18:52:03,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:52:03,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:52:03,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:03,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:52:03,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:52:05,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-30 18:52:05,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 451 flow. Second operand has 24 states, 24 states have (on average 180.04166666666666) internal successors, (4321), 24 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:05,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:05,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-30 18:52:05,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:05,995 INFO L130 PetriNetUnfolder]: 268/482 cut-off events. [2023-08-30 18:52:05,995 INFO L131 PetriNetUnfolder]: For 1693/1693 co-relation queries the response was YES. [2023-08-30 18:52:05,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 482 events. 268/482 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1861 event pairs, 34 based on Foata normal form. 1/483 useless extension candidates. Maximal degree in co-relation 1958. Up to 327 conditions per place. [2023-08-30 18:52:05,999 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 64 selfloop transitions, 33 changer transitions 4/101 dead transitions. [2023-08-30 18:52:06,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 891 flow [2023-08-30 18:52:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:52:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:52:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2560 transitions. [2023-08-30 18:52:06,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37394098743792 [2023-08-30 18:52:06,007 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2560 transitions. [2023-08-30 18:52:06,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2560 transitions. [2023-08-30 18:52:06,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:06,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2560 transitions. [2023-08-30 18:52:06,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 182.85714285714286) internal successors, (2560), 14 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:06,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:06,022 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:06,023 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 451 flow. Second operand 14 states and 2560 transitions. [2023-08-30 18:52:06,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 891 flow [2023-08-30 18:52:06,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 827 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-08-30 18:52:06,032 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 645 flow [2023-08-30 18:52:06,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=645, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-08-30 18:52:06,033 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 59 predicate places. [2023-08-30 18:52:06,034 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 645 flow [2023-08-30 18:52:06,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 180.04166666666666) internal successors, (4321), 24 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:06,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:06,035 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:06,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 18:52:06,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:06,243 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:52:06,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:06,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1488168775, now seen corresponding path program 3 times [2023-08-30 18:52:06,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:06,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868541720] [2023-08-30 18:52:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:06,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 18:52:07,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:07,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868541720] [2023-08-30 18:52:07,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868541720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:07,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225179804] [2023-08-30 18:52:07,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:52:07,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:07,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:07,721 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:52:07,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 18:52:07,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:52:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:07,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:52:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:08,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:52:08,065 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 27 treesize of output 19 [2023-08-30 18:52:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:52:08,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:52:09,001 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:52:09,001 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 50 treesize of output 50 [2023-08-30 18:52:09,037 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:52:09,038 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 34 treesize of output 1 [2023-08-30 18:52:09,042 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:52:09,042 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 34 treesize of output 1 [2023-08-30 18:52:09,046 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:52:09,046 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 34 treesize of output 1 [2023-08-30 18:52:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:52:09,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225179804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:52:09,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:52:09,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 30 [2023-08-30 18:52:09,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819228825] [2023-08-30 18:52:09,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:52:09,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 18:52:09,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 18:52:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-08-30 18:52:10,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 489 [2023-08-30 18:52:10,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 645 flow. Second operand has 31 states, 31 states have (on average 166.90322580645162) internal successors, (5174), 31 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:10,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:52:10,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 489 [2023-08-30 18:52:10,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:52:12,461 INFO L130 PetriNetUnfolder]: 597/1061 cut-off events. [2023-08-30 18:52:12,461 INFO L131 PetriNetUnfolder]: For 3820/3820 co-relation queries the response was YES. [2023-08-30 18:52:12,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 1061 events. 597/1061 cut-off events. For 3820/3820 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5128 event pairs, 76 based on Foata normal form. 2/1063 useless extension candidates. Maximal degree in co-relation 4550. Up to 364 conditions per place. [2023-08-30 18:52:12,471 INFO L137 encePairwiseOnDemand]: 474/489 looper letters, 127 selfloop transitions, 84 changer transitions 4/215 dead transitions. [2023-08-30 18:52:12,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 215 transitions, 2100 flow [2023-08-30 18:52:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 18:52:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 18:52:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4751 transitions. [2023-08-30 18:52:12,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3469909436167105 [2023-08-30 18:52:12,485 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4751 transitions. [2023-08-30 18:52:12,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4751 transitions. [2023-08-30 18:52:12,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:52:12,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4751 transitions. [2023-08-30 18:52:12,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 169.67857142857142) internal successors, (4751), 28 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:12,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:12,514 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:12,514 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 645 flow. Second operand 28 states and 4751 transitions. [2023-08-30 18:52:12,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 215 transitions, 2100 flow [2023-08-30 18:52:12,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 215 transitions, 1914 flow, removed 66 selfloop flow, removed 5 redundant places. [2023-08-30 18:52:12,532 INFO L231 Difference]: Finished difference. Result has 116 places, 127 transitions, 1312 flow [2023-08-30 18:52:12,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1312, PETRI_PLACES=116, PETRI_TRANSITIONS=127} [2023-08-30 18:52:12,533 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 93 predicate places. [2023-08-30 18:52:12,533 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 127 transitions, 1312 flow [2023-08-30 18:52:12,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 166.90322580645162) internal successors, (5174), 31 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:52:12,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:52:12,535 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:52:12,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 18:52:12,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:12,741 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:52:12,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:52:12,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1380522979, now seen corresponding path program 4 times [2023-08-30 18:52:12,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:52:12,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157676279] [2023-08-30 18:52:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:52:12,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:52:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:52:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:52:13,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:52:13,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157676279] [2023-08-30 18:52:13,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157676279] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:52:13,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648554355] [2023-08-30 18:52:13,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:52:13,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:52:13,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:52:13,478 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:52:13,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 18:52:13,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:52:13,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:52:13,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:52:13,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:52:13,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:52:13,800 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 27 treesize of output 23 [2023-08-30 18:52:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:52:13,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:52:50,422 WARN L222 SmtUtils]: Spent 36.08s on a formula simplification. DAG size of input: 44 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 18:52:50,486 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:52:50,486 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 [2023-08-30 18:52:50,532 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:52:50,533 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 19 treesize of output 11 [2023-08-30 18:52:50,538 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 18:52:50,546 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:52:50,546 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 1 [2023-08-30 18:52:50,555 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:52:50,555 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 1 [2023-08-30 18:52:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:52:50,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648554355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:52:50,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:52:50,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-08-30 18:52:50,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148025127] [2023-08-30 18:52:50,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:52:50,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 18:52:50,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:52:50,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 18:52:50,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-08-30 18:52:52,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:52:54,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:52:56,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:52:58,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:00,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:02,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:04,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:06,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:08,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:10,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:12,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:14,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:16,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:18,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:20,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:22,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:24,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:27,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:29,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:31,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:33,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:35,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:37,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:53:37,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 489 [2023-08-30 18:53:37,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 127 transitions, 1312 flow. Second operand has 27 states, 27 states have (on average 167.14814814814815) internal successors, (4513), 27 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:37,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:37,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 489 [2023-08-30 18:53:37,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:38,099 INFO L130 PetriNetUnfolder]: 663/1177 cut-off events. [2023-08-30 18:53:38,100 INFO L131 PetriNetUnfolder]: For 4665/4665 co-relation queries the response was YES. [2023-08-30 18:53:38,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5456 conditions, 1177 events. 663/1177 cut-off events. For 4665/4665 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5827 event pairs, 110 based on Foata normal form. 2/1159 useless extension candidates. Maximal degree in co-relation 5335. Up to 822 conditions per place. [2023-08-30 18:53:38,110 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 94 selfloop transitions, 64 changer transitions 3/161 dead transitions. [2023-08-30 18:53:38,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 161 transitions, 1844 flow [2023-08-30 18:53:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:53:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:53:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2045 transitions. [2023-08-30 18:53:38,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3485003408316292 [2023-08-30 18:53:38,118 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2045 transitions. [2023-08-30 18:53:38,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2045 transitions. [2023-08-30 18:53:38,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:38,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2045 transitions. [2023-08-30 18:53:38,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 170.41666666666666) internal successors, (2045), 12 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:38,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:38,131 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:38,131 INFO L175 Difference]: Start difference. First operand has 116 places, 127 transitions, 1312 flow. Second operand 12 states and 2045 transitions. [2023-08-30 18:53:38,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 161 transitions, 1844 flow [2023-08-30 18:53:38,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 161 transitions, 1712 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-08-30 18:53:38,151 INFO L231 Difference]: Finished difference. Result has 119 places, 139 transitions, 1486 flow [2023-08-30 18:53:38,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1486, PETRI_PLACES=119, PETRI_TRANSITIONS=139} [2023-08-30 18:53:38,152 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 96 predicate places. [2023-08-30 18:53:38,153 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 139 transitions, 1486 flow [2023-08-30 18:53:38,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 167.14814814814815) internal successors, (4513), 27 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:38,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:38,154 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:53:38,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 18:53:38,359 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,SelfDestructingSolverStorable12 [2023-08-30 18:53:38,359 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:53:38,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:38,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1922354213, now seen corresponding path program 5 times [2023-08-30 18:53:38,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:38,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046175943] [2023-08-30 18:53:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:38,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:53:39,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:39,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046175943] [2023-08-30 18:53:39,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046175943] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:39,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276334348] [2023-08-30 18:53:39,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:53:39,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:39,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:39,781 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:53:39,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 18:53:40,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:53:40,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:53:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:53:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:40,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:40,195 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 40 treesize of output 24 [2023-08-30 18:53:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:40,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:41,127 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:53:41,127 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 50 treesize of output 50 [2023-08-30 18:53:41,161 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:53:41,162 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 34 treesize of output 1 [2023-08-30 18:53:41,167 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:53:41,167 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 34 treesize of output 1 [2023-08-30 18:53:41,172 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:53:41,173 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 34 treesize of output 1 [2023-08-30 18:53:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:41,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276334348] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:41,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:41,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 8] total 29 [2023-08-30 18:53:41,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381541760] [2023-08-30 18:53:41,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:41,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 18:53:41,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:41,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 18:53:41,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2023-08-30 18:53:44,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 489 [2023-08-30 18:53:44,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 139 transitions, 1486 flow. Second operand has 30 states, 30 states have (on average 170.93333333333334) internal successors, (5128), 30 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:44,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:44,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 489 [2023-08-30 18:53:44,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:45,304 INFO L130 PetriNetUnfolder]: 773/1371 cut-off events. [2023-08-30 18:53:45,304 INFO L131 PetriNetUnfolder]: For 6859/6859 co-relation queries the response was YES. [2023-08-30 18:53:45,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 1371 events. 773/1371 cut-off events. For 6859/6859 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7182 event pairs, 135 based on Foata normal form. 4/1355 useless extension candidates. Maximal degree in co-relation 6711. Up to 932 conditions per place. [2023-08-30 18:53:45,315 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 103 selfloop transitions, 78 changer transitions 3/184 dead transitions. [2023-08-30 18:53:45,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 184 transitions, 2145 flow [2023-08-30 18:53:45,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:53:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:53:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2604 transitions. [2023-08-30 18:53:45,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35501022494887524 [2023-08-30 18:53:45,321 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2604 transitions. [2023-08-30 18:53:45,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2604 transitions. [2023-08-30 18:53:45,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:45,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2604 transitions. [2023-08-30 18:53:45,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 173.6) internal successors, (2604), 15 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:45,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:45,333 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:45,334 INFO L175 Difference]: Start difference. First operand has 119 places, 139 transitions, 1486 flow. Second operand 15 states and 2604 transitions. [2023-08-30 18:53:45,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 184 transitions, 2145 flow [2023-08-30 18:53:45,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 184 transitions, 2011 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-08-30 18:53:45,360 INFO L231 Difference]: Finished difference. Result has 132 places, 155 transitions, 1780 flow [2023-08-30 18:53:45,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1780, PETRI_PLACES=132, PETRI_TRANSITIONS=155} [2023-08-30 18:53:45,361 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 109 predicate places. [2023-08-30 18:53:45,361 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 155 transitions, 1780 flow [2023-08-30 18:53:45,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 170.93333333333334) internal successors, (5128), 30 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:45,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:45,363 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:53:45,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 18:53:45,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 18:53:45,570 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:53:45,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:45,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1976346153, now seen corresponding path program 6 times [2023-08-30 18:53:45,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:45,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615765815] [2023-08-30 18:53:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:45,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:46,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:46,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615765815] [2023-08-30 18:53:46,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615765815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:46,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213584075] [2023-08-30 18:53:46,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:53:46,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:46,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:46,389 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:53:46,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 18:53:46,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:53:46,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:53:46,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:53:46,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:46,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:46,655 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 27 treesize of output 19 [2023-08-30 18:53:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:46,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:47,433 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:53:47,433 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 50 treesize of output 50 [2023-08-30 18:53:47,470 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:53:47,471 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 34 treesize of output 1 [2023-08-30 18:53:47,475 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:53:47,475 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 34 treesize of output 1 [2023-08-30 18:53:47,479 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:53:47,480 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 34 treesize of output 1 [2023-08-30 18:53:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:47,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213584075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:47,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:47,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-30 18:53:47,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063209371] [2023-08-30 18:53:47,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:47,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:53:47,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:47,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:53:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:53:48,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-30 18:53:48,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 155 transitions, 1780 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:48,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:48,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-30 18:53:48,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:49,843 INFO L130 PetriNetUnfolder]: 785/1401 cut-off events. [2023-08-30 18:53:49,843 INFO L131 PetriNetUnfolder]: For 8388/8388 co-relation queries the response was YES. [2023-08-30 18:53:49,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7573 conditions, 1401 events. 785/1401 cut-off events. For 8388/8388 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7407 event pairs, 138 based on Foata normal form. 2/1383 useless extension candidates. Maximal degree in co-relation 7451. Up to 1016 conditions per place. [2023-08-30 18:53:49,855 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 115 selfloop transitions, 73 changer transitions 4/192 dead transitions. [2023-08-30 18:53:49,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 192 transitions, 2402 flow [2023-08-30 18:53:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:53:49,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:53:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2562 transitions. [2023-08-30 18:53:49,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37423312883435583 [2023-08-30 18:53:49,859 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2562 transitions. [2023-08-30 18:53:49,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2562 transitions. [2023-08-30 18:53:49,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:49,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2562 transitions. [2023-08-30 18:53:49,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 183.0) internal successors, (2562), 14 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:49,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:49,868 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:49,868 INFO L175 Difference]: Start difference. First operand has 132 places, 155 transitions, 1780 flow. Second operand 14 states and 2562 transitions. [2023-08-30 18:53:49,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 192 transitions, 2402 flow [2023-08-30 18:53:49,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 192 transitions, 2261 flow, removed 63 selfloop flow, removed 4 redundant places. [2023-08-30 18:53:49,898 INFO L231 Difference]: Finished difference. Result has 144 places, 161 transitions, 1912 flow [2023-08-30 18:53:49,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1912, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2023-08-30 18:53:49,898 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 121 predicate places. [2023-08-30 18:53:49,899 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1912 flow [2023-08-30 18:53:49,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:49,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:49,900 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:53:49,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 18:53:50,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 18:53:50,106 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:53:50,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:50,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1457835971, now seen corresponding path program 7 times [2023-08-30 18:53:50,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:50,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654926778] [2023-08-30 18:53:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:50,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:50,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:50,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654926778] [2023-08-30 18:53:50,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654926778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:50,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689831279] [2023-08-30 18:53:50,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:53:50,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:50,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:50,961 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:53:50,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 18:53:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:51,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:53:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:51,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:51,270 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 27 treesize of output 19 [2023-08-30 18:53:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:51,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:51,826 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-30 18:53:51,827 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 165 treesize of output 99 [2023-08-30 18:53:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:51,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689831279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:51,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:51,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-08-30 18:53:51,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837474687] [2023-08-30 18:53:51,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:51,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:53:51,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:51,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:53:51,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:53:53,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 489 [2023-08-30 18:53:53,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1912 flow. Second operand has 24 states, 24 states have (on average 178.04166666666666) internal successors, (4273), 24 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:53,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:53,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 489 [2023-08-30 18:53:53,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:54,193 INFO L130 PetriNetUnfolder]: 775/1409 cut-off events. [2023-08-30 18:53:54,194 INFO L131 PetriNetUnfolder]: For 8753/8753 co-relation queries the response was YES. [2023-08-30 18:53:54,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7611 conditions, 1409 events. 775/1409 cut-off events. For 8753/8753 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7619 event pairs, 152 based on Foata normal form. 14/1403 useless extension candidates. Maximal degree in co-relation 7489. Up to 1060 conditions per place. [2023-08-30 18:53:54,211 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 104 selfloop transitions, 70 changer transitions 6/180 dead transitions. [2023-08-30 18:53:54,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 180 transitions, 2378 flow [2023-08-30 18:53:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:53:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:53:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2352 transitions. [2023-08-30 18:53:54,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699858423784804 [2023-08-30 18:53:54,215 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2352 transitions. [2023-08-30 18:53:54,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2352 transitions. [2023-08-30 18:53:54,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:54,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2352 transitions. [2023-08-30 18:53:54,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 180.92307692307693) internal successors, (2352), 13 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:54,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:54,225 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:54,225 INFO L175 Difference]: Start difference. First operand has 144 places, 161 transitions, 1912 flow. Second operand 13 states and 2352 transitions. [2023-08-30 18:53:54,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 180 transitions, 2378 flow [2023-08-30 18:53:54,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 180 transitions, 2278 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-08-30 18:53:54,282 INFO L231 Difference]: Finished difference. Result has 150 places, 162 transitions, 1985 flow [2023-08-30 18:53:54,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1985, PETRI_PLACES=150, PETRI_TRANSITIONS=162} [2023-08-30 18:53:54,283 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 127 predicate places. [2023-08-30 18:53:54,284 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 162 transitions, 1985 flow [2023-08-30 18:53:54,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 178.04166666666666) internal successors, (4273), 24 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:54,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:54,285 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:53:54,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 18:53:54,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 18:53:54,491 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:53:54,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2030000009, now seen corresponding path program 8 times [2023-08-30 18:53:54,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:54,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312926947] [2023-08-30 18:53:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:54,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:55,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312926947] [2023-08-30 18:53:55,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312926947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361003169] [2023-08-30 18:53:55,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:53:55,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:55,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:55,134 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:53:55,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 18:53:55,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:53:55,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:53:55,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:53:55,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:55,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:55,421 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 27 treesize of output 19 [2023-08-30 18:53:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:55,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:56,143 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:53:56,144 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 [2023-08-30 18:53:56,190 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:53:56,191 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 19 treesize of output 11 [2023-08-30 18:53:56,203 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:53:56,203 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 1 [2023-08-30 18:53:56,211 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:53:56,211 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 1 [2023-08-30 18:53:56,213 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 18:53:56,221 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:53:56,221 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 1 [2023-08-30 18:53:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:56,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361003169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:56,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:56,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-30 18:53:56,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138632004] [2023-08-30 18:53:56,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:56,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:53:56,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:56,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:53:56,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:53:57,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-30 18:53:57,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 162 transitions, 1985 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:57,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:53:57,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-30 18:53:57,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:53:57,869 INFO L130 PetriNetUnfolder]: 807/1457 cut-off events. [2023-08-30 18:53:57,869 INFO L131 PetriNetUnfolder]: For 9801/9801 co-relation queries the response was YES. [2023-08-30 18:53:57,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8273 conditions, 1457 events. 807/1457 cut-off events. For 9801/9801 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7893 event pairs, 166 based on Foata normal form. 2/1439 useless extension candidates. Maximal degree in co-relation 8149. Up to 1124 conditions per place. [2023-08-30 18:53:57,887 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 120 selfloop transitions, 65 changer transitions 2/187 dead transitions. [2023-08-30 18:53:57,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 187 transitions, 2556 flow [2023-08-30 18:53:57,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:53:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:53:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2194 transitions. [2023-08-30 18:53:57,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37389229720518063 [2023-08-30 18:53:57,890 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2194 transitions. [2023-08-30 18:53:57,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2194 transitions. [2023-08-30 18:53:57,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:53:57,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2194 transitions. [2023-08-30 18:53:57,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 182.83333333333334) internal successors, (2194), 12 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:57,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:57,898 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:57,898 INFO L175 Difference]: Start difference. First operand has 150 places, 162 transitions, 1985 flow. Second operand 12 states and 2194 transitions. [2023-08-30 18:53:57,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 187 transitions, 2556 flow [2023-08-30 18:53:57,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 187 transitions, 2405 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-08-30 18:53:57,937 INFO L231 Difference]: Finished difference. Result has 152 places, 169 transitions, 2111 flow [2023-08-30 18:53:57,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2111, PETRI_PLACES=152, PETRI_TRANSITIONS=169} [2023-08-30 18:53:57,938 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 129 predicate places. [2023-08-30 18:53:57,938 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 169 transitions, 2111 flow [2023-08-30 18:53:57,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:53:57,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:53:57,939 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:53:57,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 18:53:58,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 18:53:58,145 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:53:58,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:53:58,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1391226607, now seen corresponding path program 9 times [2023-08-30 18:53:58,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:53:58,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293032462] [2023-08-30 18:53:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:53:58,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:53:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:53:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:58,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:53:58,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293032462] [2023-08-30 18:53:58,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293032462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:53:58,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009093907] [2023-08-30 18:53:58,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:53:58,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:53:58,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:53:58,773 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:53:58,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 18:53:58,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:53:58,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:53:58,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:53:58,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:53:59,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:53:59,041 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 40 treesize of output 24 [2023-08-30 18:53:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:59,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:53:59,736 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:53:59,736 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 [2023-08-30 18:53:59,771 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:53:59,772 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 19 treesize of output 11 [2023-08-30 18:53:59,783 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:53:59,783 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 1 [2023-08-30 18:53:59,791 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:53:59,791 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 1 [2023-08-30 18:53:59,793 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 18:53:59,802 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:53:59,803 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 58 treesize of output 1 [2023-08-30 18:53:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:53:59,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009093907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:53:59,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:53:59,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-30 18:53:59,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849114985] [2023-08-30 18:53:59,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:53:59,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:53:59,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:53:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:53:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:54:00,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-30 18:54:00,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 169 transitions, 2111 flow. Second operand has 22 states, 22 states have (on average 180.13636363636363) internal successors, (3963), 22 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:00,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:00,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-30 18:54:00,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:01,339 INFO L130 PetriNetUnfolder]: 819/1487 cut-off events. [2023-08-30 18:54:01,339 INFO L131 PetriNetUnfolder]: For 11128/11128 co-relation queries the response was YES. [2023-08-30 18:54:01,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8554 conditions, 1487 events. 819/1487 cut-off events. For 11128/11128 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8161 event pairs, 172 based on Foata normal form. 2/1469 useless extension candidates. Maximal degree in co-relation 8429. Up to 1102 conditions per place. [2023-08-30 18:54:01,352 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 121 selfloop transitions, 68 changer transitions 5/194 dead transitions. [2023-08-30 18:54:01,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 194 transitions, 2650 flow [2023-08-30 18:54:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:54:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:54:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2379 transitions. [2023-08-30 18:54:01,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37423312883435583 [2023-08-30 18:54:01,356 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2379 transitions. [2023-08-30 18:54:01,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2379 transitions. [2023-08-30 18:54:01,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:01,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2379 transitions. [2023-08-30 18:54:01,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:01,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:01,386 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:01,386 INFO L175 Difference]: Start difference. First operand has 152 places, 169 transitions, 2111 flow. Second operand 13 states and 2379 transitions. [2023-08-30 18:54:01,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 194 transitions, 2650 flow [2023-08-30 18:54:01,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 194 transitions, 2569 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-08-30 18:54:01,420 INFO L231 Difference]: Finished difference. Result has 160 places, 170 transitions, 2214 flow [2023-08-30 18:54:01,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2214, PETRI_PLACES=160, PETRI_TRANSITIONS=170} [2023-08-30 18:54:01,421 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 137 predicate places. [2023-08-30 18:54:01,421 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 170 transitions, 2214 flow [2023-08-30 18:54:01,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 180.13636363636363) internal successors, (3963), 22 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:01,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:01,422 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:01,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:01,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 18:54:01,629 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:01,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:01,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1193323809, now seen corresponding path program 10 times [2023-08-30 18:54:01,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:01,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380110799] [2023-08-30 18:54:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:01,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:02,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380110799] [2023-08-30 18:54:02,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380110799] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218625876] [2023-08-30 18:54:02,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:54:02,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:02,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:02,300 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) [2023-08-30 18:54:02,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 18:54:02,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:54:02,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:02,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:54:02,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:02,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:02,552 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 27 treesize of output 19 [2023-08-30 18:54:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:02,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:03,134 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:54:03,135 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 [2023-08-30 18:54:03,167 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:54:03,167 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 19 treesize of output 11 [2023-08-30 18:54:03,176 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:54:03,177 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 1 [2023-08-30 18:54:03,184 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:54:03,185 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 1 [2023-08-30 18:54:03,187 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 18:54:03,195 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:54:03,196 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 1 [2023-08-30 18:54:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:03,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218625876] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:03,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:03,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-30 18:54:03,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396864399] [2023-08-30 18:54:03,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:03,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:54:03,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:54:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:54:05,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:54:06,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-30 18:54:06,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 170 transitions, 2214 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:06,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:06,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-30 18:54:06,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:06,817 INFO L130 PetriNetUnfolder]: 871/1589 cut-off events. [2023-08-30 18:54:06,817 INFO L131 PetriNetUnfolder]: For 14009/14009 co-relation queries the response was YES. [2023-08-30 18:54:06,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9591 conditions, 1589 events. 871/1589 cut-off events. For 14009/14009 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8944 event pairs, 275 based on Foata normal form. 4/1569 useless extension candidates. Maximal degree in co-relation 9463. Up to 1242 conditions per place. [2023-08-30 18:54:06,830 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 159 selfloop transitions, 46 changer transitions 5/210 dead transitions. [2023-08-30 18:54:06,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 210 transitions, 3038 flow [2023-08-30 18:54:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:54:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:54:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2198 transitions. [2023-08-30 18:54:06,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37457396046353103 [2023-08-30 18:54:06,833 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2198 transitions. [2023-08-30 18:54:06,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2198 transitions. [2023-08-30 18:54:06,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:06,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2198 transitions. [2023-08-30 18:54:06,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.16666666666666) internal successors, (2198), 12 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:06,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:06,840 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:06,840 INFO L175 Difference]: Start difference. First operand has 160 places, 170 transitions, 2214 flow. Second operand 12 states and 2198 transitions. [2023-08-30 18:54:06,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 210 transitions, 3038 flow [2023-08-30 18:54:06,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 210 transitions, 2865 flow, removed 17 selfloop flow, removed 12 redundant places. [2023-08-30 18:54:06,873 INFO L231 Difference]: Finished difference. Result has 163 places, 184 transitions, 2406 flow [2023-08-30 18:54:06,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2406, PETRI_PLACES=163, PETRI_TRANSITIONS=184} [2023-08-30 18:54:06,873 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 140 predicate places. [2023-08-30 18:54:06,873 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 184 transitions, 2406 flow [2023-08-30 18:54:06,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:06,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:06,874 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:06,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:07,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:07,075 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:07,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1163402759, now seen corresponding path program 11 times [2023-08-30 18:54:07,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:07,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081519590] [2023-08-30 18:54:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:07,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 18:54:08,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:08,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081519590] [2023-08-30 18:54:08,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081519590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:08,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792522943] [2023-08-30 18:54:08,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:54:08,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:08,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:08,549 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) [2023-08-30 18:54:08,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 18:54:08,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:54:08,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:08,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 18:54:08,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:09,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:54:09,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:54:09,102 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:54:09,102 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 20 treesize of output 25 [2023-08-30 18:54:09,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:09,212 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 27 treesize of output 19 [2023-08-30 18:54:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:09,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:09,927 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_int| c_~o_2~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))) (and (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (= (select (select .cse0 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (or (< .cse1 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse3 (select (select .cse4 c_~o_2~0.base) c_~o_2~0.offset)) (.cse2 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse2 .cse3) (= .cse3 .cse2)))))) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse5 (select (select .cse7 c_~o_2~0.base) c_~o_2~0.offset)) (.cse6 (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse5 .cse6) (= .cse5 .cse6))))) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse1)) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse9 (select (select .cse10 c_~o_2~0.base) c_~o_2~0.offset)) (.cse8 (select (select .cse10 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse8 .cse9) (< .cse9 .cse8))))) (= .cse1 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))) is different from false [2023-08-30 18:54:10,002 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-30 18:54:10,002 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 150 treesize of output 155 [2023-08-30 18:54:10,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:10,016 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 99 treesize of output 91 [2023-08-30 18:54:10,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:54:10,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:54:10,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2023-08-30 18:54:10,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:54:10,149 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2023-08-30 18:54:10,171 INFO L321 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-08-30 18:54:10,171 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 150 treesize of output 1 [2023-08-30 18:54:10,188 INFO L321 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-08-30 18:54:10,188 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 150 treesize of output 1 [2023-08-30 18:54:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:10,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792522943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:10,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 38 [2023-08-30 18:54:10,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744059816] [2023-08-30 18:54:10,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:10,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 18:54:10,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:10,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 18:54:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1318, Unknown=15, NotChecked=74, Total=1560 [2023-08-30 18:54:10,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 489 [2023-08-30 18:54:10,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 184 transitions, 2406 flow. Second operand has 40 states, 40 states have (on average 135.6) internal successors, (5424), 40 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:10,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:10,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 489 [2023-08-30 18:54:10,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:13,224 INFO L130 PetriNetUnfolder]: 1013/1857 cut-off events. [2023-08-30 18:54:13,224 INFO L131 PetriNetUnfolder]: For 18945/18945 co-relation queries the response was YES. [2023-08-30 18:54:13,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11467 conditions, 1857 events. 1013/1857 cut-off events. For 18945/18945 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 10909 event pairs, 116 based on Foata normal form. 12/1869 useless extension candidates. Maximal degree in co-relation 11337. Up to 508 conditions per place. [2023-08-30 18:54:13,237 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 125 selfloop transitions, 115 changer transitions 18/258 dead transitions. [2023-08-30 18:54:13,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 258 transitions, 3628 flow [2023-08-30 18:54:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 18:54:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 18:54:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3448 transitions. [2023-08-30 18:54:13,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2820449897750511 [2023-08-30 18:54:13,242 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3448 transitions. [2023-08-30 18:54:13,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3448 transitions. [2023-08-30 18:54:13,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:13,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3448 transitions. [2023-08-30 18:54:13,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 137.92) internal successors, (3448), 25 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:13,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:13,256 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:13,256 INFO L175 Difference]: Start difference. First operand has 163 places, 184 transitions, 2406 flow. Second operand 25 states and 3448 transitions. [2023-08-30 18:54:13,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 258 transitions, 3628 flow [2023-08-30 18:54:13,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 258 transitions, 3520 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-08-30 18:54:13,313 INFO L231 Difference]: Finished difference. Result has 190 places, 194 transitions, 2849 flow [2023-08-30 18:54:13,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2849, PETRI_PLACES=190, PETRI_TRANSITIONS=194} [2023-08-30 18:54:13,313 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 167 predicate places. [2023-08-30 18:54:13,313 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 194 transitions, 2849 flow [2023-08-30 18:54:13,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 135.6) internal successors, (5424), 40 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:13,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:13,315 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:13,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:13,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:13,522 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:13,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2033547511, now seen corresponding path program 12 times [2023-08-30 18:54:13,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:13,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73323250] [2023-08-30 18:54:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:13,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:14,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:14,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73323250] [2023-08-30 18:54:14,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73323250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:14,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719709034] [2023-08-30 18:54:14,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:54:14,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:14,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:14,169 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) [2023-08-30 18:54:14,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 18:54:14,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:54:14,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:14,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:54:14,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:14,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:14,475 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 27 treesize of output 19 [2023-08-30 18:54:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:14,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:14,891 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-30 18:54:14,891 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 185 treesize of output 103 [2023-08-30 18:54:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:14,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719709034] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:14,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:14,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-08-30 18:54:14,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331105582] [2023-08-30 18:54:14,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:14,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:54:14,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:14,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:54:14,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:54:15,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-30 18:54:15,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 194 transitions, 2849 flow. Second operand has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:15,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:15,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-30 18:54:15,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:16,590 INFO L130 PetriNetUnfolder]: 1051/1915 cut-off events. [2023-08-30 18:54:16,591 INFO L131 PetriNetUnfolder]: For 25705/25705 co-relation queries the response was YES. [2023-08-30 18:54:16,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12966 conditions, 1915 events. 1051/1915 cut-off events. For 25705/25705 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11234 event pairs, 351 based on Foata normal form. 6/1921 useless extension candidates. Maximal degree in co-relation 12818. Up to 1562 conditions per place. [2023-08-30 18:54:16,606 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 174 selfloop transitions, 53 changer transitions 11/238 dead transitions. [2023-08-30 18:54:16,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 238 transitions, 3893 flow [2023-08-30 18:54:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:54:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:54:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2545 transitions. [2023-08-30 18:54:16,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37174992696465087 [2023-08-30 18:54:16,612 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2545 transitions. [2023-08-30 18:54:16,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2545 transitions. [2023-08-30 18:54:16,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:16,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2545 transitions. [2023-08-30 18:54:16,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 181.78571428571428) internal successors, (2545), 14 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:16,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:16,621 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:16,621 INFO L175 Difference]: Start difference. First operand has 190 places, 194 transitions, 2849 flow. Second operand 14 states and 2545 transitions. [2023-08-30 18:54:16,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 238 transitions, 3893 flow [2023-08-30 18:54:16,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 238 transitions, 3693 flow, removed 40 selfloop flow, removed 16 redundant places. [2023-08-30 18:54:16,704 INFO L231 Difference]: Finished difference. Result has 191 places, 207 transitions, 3098 flow [2023-08-30 18:54:16,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3098, PETRI_PLACES=191, PETRI_TRANSITIONS=207} [2023-08-30 18:54:16,705 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 168 predicate places. [2023-08-30 18:54:16,705 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 207 transitions, 3098 flow [2023-08-30 18:54:16,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:16,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:16,706 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:16,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:16,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:16,912 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:16,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2027142943, now seen corresponding path program 13 times [2023-08-30 18:54:16,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:16,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300612844] [2023-08-30 18:54:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:16,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:17,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:17,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300612844] [2023-08-30 18:54:17,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300612844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:17,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741722089] [2023-08-30 18:54:17,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:54:17,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:17,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:17,631 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) [2023-08-30 18:54:17,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 18:54:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:17,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 18:54:17,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:54:17,907 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 [2023-08-30 18:54:17,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:17,979 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 27 treesize of output 19 [2023-08-30 18:54:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:18,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:18,746 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (let ((.cse2 (select .cse0 .cse3))) (or (< (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse2) (= .cse2 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse6 (select .cse7 ~o_2~0.base))) (let ((.cse4 (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset)) (.cse5 (select .cse6 c_~o_2~0.offset))) (or (< .cse4 .cse5) (< (select .cse6 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse4 .cse5)))))) (or (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (= (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse8 ~o_2~0.base) c_~o_2~0.offset)))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse11 (select .cse12 ~o_2~0.base))) (let ((.cse10 (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset)) (.cse9 (select .cse11 c_~o_2~0.offset))) (or (< .cse9 .cse10) (= .cse10 .cse9) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse11 .cse3))))))) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse14 (select .cse13 ~o_2~0.base))) (let ((.cse15 (select .cse14 .cse3))) (or (< (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset) (select .cse14 c_~o_2~0.offset)) (< .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))))) is different from false [2023-08-30 18:54:18,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:18,801 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 156 treesize of output 160 [2023-08-30 18:54:18,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:18,820 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 76 treesize of output 84 [2023-08-30 18:54:19,176 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:54:19,179 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:54:19,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-30 18:54:19,181 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:54:19,184 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:54:19,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-30 18:54:19,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:54:19,189 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:54:19,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-30 18:54:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:19,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741722089] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:19,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:19,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-08-30 18:54:19,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056148712] [2023-08-30 18:54:19,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:19,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 18:54:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:19,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 18:54:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=816, Unknown=1, NotChecked=58, Total=992 [2023-08-30 18:54:19,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 489 [2023-08-30 18:54:19,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 207 transitions, 3098 flow. Second operand has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:19,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:19,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 489 [2023-08-30 18:54:19,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:21,538 INFO L130 PetriNetUnfolder]: 1127/2039 cut-off events. [2023-08-30 18:54:21,539 INFO L131 PetriNetUnfolder]: For 29065/29065 co-relation queries the response was YES. [2023-08-30 18:54:21,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14543 conditions, 2039 events. 1127/2039 cut-off events. For 29065/29065 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 11959 event pairs, 238 based on Foata normal form. 2/2041 useless extension candidates. Maximal degree in co-relation 14410. Up to 1568 conditions per place. [2023-08-30 18:54:21,556 INFO L137 encePairwiseOnDemand]: 475/489 looper letters, 139 selfloop transitions, 121 changer transitions 3/263 dead transitions. [2023-08-30 18:54:21,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 263 transitions, 4420 flow [2023-08-30 18:54:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:54:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:54:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2264 transitions. [2023-08-30 18:54:21,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307040607654105 [2023-08-30 18:54:21,560 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2264 transitions. [2023-08-30 18:54:21,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2264 transitions. [2023-08-30 18:54:21,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:21,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2264 transitions. [2023-08-30 18:54:21,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.71428571428572) internal successors, (2264), 14 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:21,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:21,569 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:21,569 INFO L175 Difference]: Start difference. First operand has 191 places, 207 transitions, 3098 flow. Second operand 14 states and 2264 transitions. [2023-08-30 18:54:21,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 263 transitions, 4420 flow [2023-08-30 18:54:21,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 263 transitions, 4197 flow, removed 84 selfloop flow, removed 8 redundant places. [2023-08-30 18:54:21,665 INFO L231 Difference]: Finished difference. Result has 198 places, 241 transitions, 3899 flow [2023-08-30 18:54:21,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3899, PETRI_PLACES=198, PETRI_TRANSITIONS=241} [2023-08-30 18:54:21,666 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 175 predicate places. [2023-08-30 18:54:21,666 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 241 transitions, 3899 flow [2023-08-30 18:54:21,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:21,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:21,667 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:21,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:21,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:21,873 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:21,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:21,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1905681491, now seen corresponding path program 14 times [2023-08-30 18:54:21,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:21,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709967049] [2023-08-30 18:54:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:21,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:22,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:22,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709967049] [2023-08-30 18:54:22,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709967049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:22,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857765083] [2023-08-30 18:54:22,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:54:22,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:22,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:22,765 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) [2023-08-30 18:54:22,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 18:54:22,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:54:22,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:22,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 18:54:22,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:23,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:54:23,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:54:23,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:23,135 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 27 treesize of output 19 [2023-08-30 18:54:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:23,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:23,871 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1362 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1362))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (let ((.cse2 (select .cse1 .cse3))) (or (< (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset)) (< .cse2 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse2 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) (forall ((v_ArrVal_1362 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1362))) (let ((.cse4 (select .cse5 ~o_2~0.base))) (let ((.cse6 (select .cse4 .cse3))) (or (< (select .cse4 c_~o_2~0.offset) (select (select .cse5 c_~o_0~0.base) c_~o_0~0.offset)) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse6) (= .cse6 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) (forall ((v_ArrVal_1362 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1362))) (let ((.cse9 (select .cse10 ~o_2~0.base))) (let ((.cse8 (select (select .cse10 c_~o_0~0.base) c_~o_0~0.offset)) (.cse7 (select .cse9 c_~o_2~0.offset))) (or (< .cse7 .cse8) (= .cse8 .cse7) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse9 .cse3))))))) (or (forall ((v_ArrVal_1362 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1362))) (= (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse11 ~o_2~0.base) c_~o_2~0.offset)))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_1362 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1362))) (let ((.cse14 (select .cse15 ~o_2~0.base))) (let ((.cse12 (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)) (.cse13 (select .cse14 c_~o_2~0.offset))) (or (< .cse12 .cse13) (= .cse12 .cse13) (< (select .cse14 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))))) is different from false [2023-08-30 18:54:23,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:23,913 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 156 treesize of output 160 [2023-08-30 18:54:23,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:23,933 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 76 treesize of output 84 [2023-08-30 18:54:24,662 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:54:24,666 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:54:24,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-30 18:54:24,669 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:54:24,673 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:54:24,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-30 18:54:24,675 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:54:24,679 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:54:24,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-30 18:54:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:24,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857765083] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:24,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:24,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-08-30 18:54:24,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203355383] [2023-08-30 18:54:24,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:24,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 18:54:24,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:24,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 18:54:24,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=822, Unknown=1, NotChecked=58, Total=992 [2023-08-30 18:54:25,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-08-30 18:54:25,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 241 transitions, 3899 flow. Second operand has 32 states, 32 states have (on average 157.8125) internal successors, (5050), 32 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:25,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:25,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-08-30 18:54:25,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:26,288 INFO L130 PetriNetUnfolder]: 1115/2045 cut-off events. [2023-08-30 18:54:26,288 INFO L131 PetriNetUnfolder]: For 27792/27792 co-relation queries the response was YES. [2023-08-30 18:54:26,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14796 conditions, 2045 events. 1115/2045 cut-off events. For 27792/27792 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12246 event pairs, 239 based on Foata normal form. 26/2071 useless extension candidates. Maximal degree in co-relation 14660. Up to 1482 conditions per place. [2023-08-30 18:54:26,302 INFO L137 encePairwiseOnDemand]: 476/489 looper letters, 150 selfloop transitions, 108 changer transitions 8/266 dead transitions. [2023-08-30 18:54:26,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 266 transitions, 4583 flow [2023-08-30 18:54:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:54:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:54:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2253 transitions. [2023-08-30 18:54:26,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3290972830850131 [2023-08-30 18:54:26,305 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2253 transitions. [2023-08-30 18:54:26,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2253 transitions. [2023-08-30 18:54:26,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:26,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2253 transitions. [2023-08-30 18:54:26,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 160.92857142857142) internal successors, (2253), 14 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:26,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:26,313 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:26,313 INFO L175 Difference]: Start difference. First operand has 198 places, 241 transitions, 3899 flow. Second operand 14 states and 2253 transitions. [2023-08-30 18:54:26,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 266 transitions, 4583 flow [2023-08-30 18:54:26,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 266 transitions, 4362 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-08-30 18:54:26,392 INFO L231 Difference]: Finished difference. Result has 202 places, 236 transitions, 3836 flow [2023-08-30 18:54:26,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3836, PETRI_PLACES=202, PETRI_TRANSITIONS=236} [2023-08-30 18:54:26,393 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 179 predicate places. [2023-08-30 18:54:26,393 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 236 transitions, 3836 flow [2023-08-30 18:54:26,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 157.8125) internal successors, (5050), 32 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:26,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:26,394 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:26,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:26,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:26,595 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:26,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:26,595 INFO L85 PathProgramCache]: Analyzing trace with hash -797449613, now seen corresponding path program 15 times [2023-08-30 18:54:26,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:26,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210972912] [2023-08-30 18:54:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:26,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:27,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:27,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210972912] [2023-08-30 18:54:27,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210972912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:27,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469536542] [2023-08-30 18:54:27,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:54:27,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:27,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:27,111 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) [2023-08-30 18:54:27,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 18:54:27,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:54:27,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:27,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:54:27,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:27,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:27,413 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 40 treesize of output 24 [2023-08-30 18:54:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:27,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:27,797 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:54:27,797 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 110 treesize of output 71 [2023-08-30 18:54:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:27,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469536542] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:27,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:27,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-30 18:54:27,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510196512] [2023-08-30 18:54:27,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:27,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:54:27,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:27,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:54:27,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:54:28,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-30 18:54:28,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 236 transitions, 3836 flow. Second operand has 22 states, 22 states have (on average 180.13636363636363) internal successors, (3963), 22 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:28,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:28,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-30 18:54:28,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:29,896 INFO L130 PetriNetUnfolder]: 1269/2299 cut-off events. [2023-08-30 18:54:29,896 INFO L131 PetriNetUnfolder]: For 33917/33917 co-relation queries the response was YES. [2023-08-30 18:54:29,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17684 conditions, 2299 events. 1269/2299 cut-off events. For 33917/33917 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 13877 event pairs, 203 based on Foata normal form. 2/2301 useless extension candidates. Maximal degree in co-relation 17548. Up to 1064 conditions per place. [2023-08-30 18:54:29,914 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 193 selfloop transitions, 98 changer transitions 2/293 dead transitions. [2023-08-30 18:54:29,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 293 transitions, 5266 flow [2023-08-30 18:54:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:54:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:54:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2202 transitions. [2023-08-30 18:54:29,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37525562372188137 [2023-08-30 18:54:29,917 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2202 transitions. [2023-08-30 18:54:29,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2202 transitions. [2023-08-30 18:54:29,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:29,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2202 transitions. [2023-08-30 18:54:29,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.5) internal successors, (2202), 12 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:29,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:29,923 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:29,923 INFO L175 Difference]: Start difference. First operand has 202 places, 236 transitions, 3836 flow. Second operand 12 states and 2202 transitions. [2023-08-30 18:54:29,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 293 transitions, 5266 flow [2023-08-30 18:54:29,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 293 transitions, 5014 flow, removed 10 selfloop flow, removed 14 redundant places. [2023-08-30 18:54:30,000 INFO L231 Difference]: Finished difference. Result has 203 places, 255 transitions, 4392 flow [2023-08-30 18:54:30,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3614, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4392, PETRI_PLACES=203, PETRI_TRANSITIONS=255} [2023-08-30 18:54:30,001 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 180 predicate places. [2023-08-30 18:54:30,001 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 255 transitions, 4392 flow [2023-08-30 18:54:30,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 180.13636363636363) internal successors, (3963), 22 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:30,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:30,002 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:30,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:30,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:30,203 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:30,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:30,203 INFO L85 PathProgramCache]: Analyzing trace with hash 750197811, now seen corresponding path program 16 times [2023-08-30 18:54:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:30,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913726505] [2023-08-30 18:54:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:30,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:30,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:30,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913726505] [2023-08-30 18:54:30,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913726505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:30,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618146300] [2023-08-30 18:54:30,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:54:30,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:30,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:30,823 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) [2023-08-30 18:54:30,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 18:54:31,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:54:31,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:31,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:54:31,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:31,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:31,157 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 27 treesize of output 19 [2023-08-30 18:54:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:31,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:31,674 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:54:31,674 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 [2023-08-30 18:54:31,706 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:54:31,707 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 19 treesize of output 11 [2023-08-30 18:54:31,716 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:54:31,717 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 1 [2023-08-30 18:54:31,725 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:54:31,725 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 1 [2023-08-30 18:54:31,728 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 18:54:31,736 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:54:31,736 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 1 [2023-08-30 18:54:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:31,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618146300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:31,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:31,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-30 18:54:31,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643177233] [2023-08-30 18:54:31,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:31,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:54:31,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:54:31,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:54:32,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-30 18:54:32,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 255 transitions, 4392 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:32,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:32,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-30 18:54:32,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:33,501 INFO L130 PetriNetUnfolder]: 1289/2345 cut-off events. [2023-08-30 18:54:33,502 INFO L131 PetriNetUnfolder]: For 38261/38261 co-relation queries the response was YES. [2023-08-30 18:54:33,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18672 conditions, 2345 events. 1289/2345 cut-off events. For 38261/38261 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14293 event pairs, 427 based on Foata normal form. 2/2347 useless extension candidates. Maximal degree in co-relation 18534. Up to 2002 conditions per place. [2023-08-30 18:54:33,521 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 234 selfloop transitions, 55 changer transitions 2/291 dead transitions. [2023-08-30 18:54:33,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 291 transitions, 5410 flow [2023-08-30 18:54:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:54:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:54:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2377 transitions. [2023-08-30 18:54:33,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739185150228095 [2023-08-30 18:54:33,524 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2377 transitions. [2023-08-30 18:54:33,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2377 transitions. [2023-08-30 18:54:33,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:33,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2377 transitions. [2023-08-30 18:54:33,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 182.84615384615384) internal successors, (2377), 13 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:33,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:33,531 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:33,532 INFO L175 Difference]: Start difference. First operand has 203 places, 255 transitions, 4392 flow. Second operand 13 states and 2377 transitions. [2023-08-30 18:54:33,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 291 transitions, 5410 flow [2023-08-30 18:54:33,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 291 transitions, 5263 flow, removed 51 selfloop flow, removed 5 redundant places. [2023-08-30 18:54:33,650 INFO L231 Difference]: Finished difference. Result has 213 places, 265 transitions, 4638 flow [2023-08-30 18:54:33,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4247, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4638, PETRI_PLACES=213, PETRI_TRANSITIONS=265} [2023-08-30 18:54:33,650 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 190 predicate places. [2023-08-30 18:54:33,650 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 265 transitions, 4638 flow [2023-08-30 18:54:33,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:33,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:33,651 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:33,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:33,851 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,SelfDestructingSolverStorable24 [2023-08-30 18:54:33,852 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:33,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash 702796357, now seen corresponding path program 17 times [2023-08-30 18:54:33,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:33,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543101910] [2023-08-30 18:54:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:33,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:34,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:34,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543101910] [2023-08-30 18:54:34,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543101910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:34,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91203325] [2023-08-30 18:54:34,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:54:34,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:34,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:34,324 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) [2023-08-30 18:54:34,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 18:54:34,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:54:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:34,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 18:54:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:34,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:34,665 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 27 treesize of output 23 [2023-08-30 18:54:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:34,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:35,149 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-30 18:54:35,150 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 165 treesize of output 99 [2023-08-30 18:54:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:35,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91203325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:35,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:35,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-08-30 18:54:35,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847171992] [2023-08-30 18:54:35,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:35,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 18:54:35,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:35,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 18:54:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-08-30 18:54:36,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-30 18:54:36,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 265 transitions, 4638 flow. Second operand has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:36,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:36,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-30 18:54:36,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:37,197 INFO L130 PetriNetUnfolder]: 1287/2353 cut-off events. [2023-08-30 18:54:37,198 INFO L131 PetriNetUnfolder]: For 38477/38477 co-relation queries the response was YES. [2023-08-30 18:54:37,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18809 conditions, 2353 events. 1287/2353 cut-off events. For 38477/38477 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 14441 event pairs, 435 based on Foata normal form. 2/2355 useless extension candidates. Maximal degree in co-relation 18668. Up to 1980 conditions per place. [2023-08-30 18:54:37,222 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 221 selfloop transitions, 68 changer transitions 2/291 dead transitions. [2023-08-30 18:54:37,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 291 transitions, 5455 flow [2023-08-30 18:54:37,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:54:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:54:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2374 transitions. [2023-08-30 18:54:37,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37344659430549 [2023-08-30 18:54:37,224 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2374 transitions. [2023-08-30 18:54:37,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2374 transitions. [2023-08-30 18:54:37,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:37,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2374 transitions. [2023-08-30 18:54:37,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 182.6153846153846) internal successors, (2374), 13 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:37,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:37,231 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:37,231 INFO L175 Difference]: Start difference. First operand has 213 places, 265 transitions, 4638 flow. Second operand 13 states and 2374 transitions. [2023-08-30 18:54:37,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 291 transitions, 5455 flow [2023-08-30 18:54:37,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 291 transitions, 5292 flow, removed 51 selfloop flow, removed 7 redundant places. [2023-08-30 18:54:37,374 INFO L231 Difference]: Finished difference. Result has 220 places, 269 transitions, 4717 flow [2023-08-30 18:54:37,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4717, PETRI_PLACES=220, PETRI_TRANSITIONS=269} [2023-08-30 18:54:37,375 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 197 predicate places. [2023-08-30 18:54:37,375 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 269 transitions, 4717 flow [2023-08-30 18:54:37,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:37,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:37,376 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:37,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-30 18:54:37,578 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,SelfDestructingSolverStorable25 [2023-08-30 18:54:37,578 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:37,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:37,579 INFO L85 PathProgramCache]: Analyzing trace with hash -347288759, now seen corresponding path program 18 times [2023-08-30 18:54:37,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:37,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343353183] [2023-08-30 18:54:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:37,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:38,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:38,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343353183] [2023-08-30 18:54:38,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343353183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:38,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260331881] [2023-08-30 18:54:38,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:54:38,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:38,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:38,256 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) [2023-08-30 18:54:38,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 18:54:38,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 18:54:38,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 18:54:38,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:38,594 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:38,594 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 27 treesize of output 19 [2023-08-30 18:54:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:38,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:39,241 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:54:39,242 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 [2023-08-30 18:54:39,283 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-30 18:54:39,284 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 19 treesize of output 11 [2023-08-30 18:54:39,296 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:54:39,296 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 1 [2023-08-30 18:54:39,304 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:54:39,304 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 1 [2023-08-30 18:54:39,307 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-30 18:54:39,315 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-30 18:54:39,315 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 1 [2023-08-30 18:54:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:39,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260331881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:39,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:39,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-30 18:54:39,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726352891] [2023-08-30 18:54:39,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:39,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:54:39,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:39,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:54:39,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:54:40,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-30 18:54:40,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 269 transitions, 4717 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:40,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:40,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-30 18:54:40,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:41,251 INFO L130 PetriNetUnfolder]: 1287/2351 cut-off events. [2023-08-30 18:54:41,251 INFO L131 PetriNetUnfolder]: For 37778/37778 co-relation queries the response was YES. [2023-08-30 18:54:41,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18835 conditions, 2351 events. 1287/2351 cut-off events. For 37778/37778 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 14410 event pairs, 429 based on Foata normal form. 2/2353 useless extension candidates. Maximal degree in co-relation 18692. Up to 1978 conditions per place. [2023-08-30 18:54:41,269 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 240 selfloop transitions, 56 changer transitions 3/299 dead transitions. [2023-08-30 18:54:41,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 299 transitions, 5571 flow [2023-08-30 18:54:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:54:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:54:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2199 transitions. [2023-08-30 18:54:41,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37474437627811863 [2023-08-30 18:54:41,271 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2199 transitions. [2023-08-30 18:54:41,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2199 transitions. [2023-08-30 18:54:41,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:41,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2199 transitions. [2023-08-30 18:54:41,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.25) internal successors, (2199), 12 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:41,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:41,277 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:41,277 INFO L175 Difference]: Start difference. First operand has 220 places, 269 transitions, 4717 flow. Second operand 12 states and 2199 transitions. [2023-08-30 18:54:41,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 299 transitions, 5571 flow [2023-08-30 18:54:41,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 299 transitions, 5403 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-08-30 18:54:41,377 INFO L231 Difference]: Finished difference. Result has 222 places, 271 transitions, 4736 flow [2023-08-30 18:54:41,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4736, PETRI_PLACES=222, PETRI_TRANSITIONS=271} [2023-08-30 18:54:41,378 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 199 predicate places. [2023-08-30 18:54:41,378 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 271 transitions, 4736 flow [2023-08-30 18:54:41,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:41,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:41,379 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:41,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:41,580 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,SelfDestructingSolverStorable26 [2023-08-30 18:54:41,580 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:41,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:41,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1754254317, now seen corresponding path program 19 times [2023-08-30 18:54:41,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:41,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032261349] [2023-08-30 18:54:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:41,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:42,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:42,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032261349] [2023-08-30 18:54:42,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032261349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:42,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163677445] [2023-08-30 18:54:42,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:54:42,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:42,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:42,289 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) [2023-08-30 18:54:42,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 18:54:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:42,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:54:42,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:42,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:42,663 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 46 treesize of output 30 [2023-08-30 18:54:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:42,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:42,920 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:54:42,920 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 [2023-08-30 18:54:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:42,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163677445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:42,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:42,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 18:54:42,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116132931] [2023-08-30 18:54:42,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:42,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:54:42,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:42,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:54:42,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:54:43,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:54:43,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 271 transitions, 4736 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:43,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:43,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:54:43,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:44,644 INFO L130 PetriNetUnfolder]: 1349/2467 cut-off events. [2023-08-30 18:54:44,644 INFO L131 PetriNetUnfolder]: For 40815/40815 co-relation queries the response was YES. [2023-08-30 18:54:44,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19638 conditions, 2467 events. 1349/2467 cut-off events. For 40815/40815 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15377 event pairs, 237 based on Foata normal form. 8/2475 useless extension candidates. Maximal degree in co-relation 19494. Up to 747 conditions per place. [2023-08-30 18:54:44,667 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 237 selfloop transitions, 136 changer transitions 5/378 dead transitions. [2023-08-30 18:54:44,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 378 transitions, 6954 flow [2023-08-30 18:54:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:54:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:54:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2798 transitions. [2023-08-30 18:54:44,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814587593728698 [2023-08-30 18:54:44,670 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2798 transitions. [2023-08-30 18:54:44,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2798 transitions. [2023-08-30 18:54:44,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:44,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2798 transitions. [2023-08-30 18:54:44,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 186.53333333333333) internal successors, (2798), 15 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:44,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:44,677 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:44,678 INFO L175 Difference]: Start difference. First operand has 222 places, 271 transitions, 4736 flow. Second operand 15 states and 2798 transitions. [2023-08-30 18:54:44,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 378 transitions, 6954 flow [2023-08-30 18:54:44,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 378 transitions, 6793 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-08-30 18:54:44,838 INFO L231 Difference]: Finished difference. Result has 229 places, 284 transitions, 5083 flow [2023-08-30 18:54:44,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4603, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5083, PETRI_PLACES=229, PETRI_TRANSITIONS=284} [2023-08-30 18:54:44,838 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 206 predicate places. [2023-08-30 18:54:44,838 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 284 transitions, 5083 flow [2023-08-30 18:54:44,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:44,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:44,839 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:44,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:45,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:45,043 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:45,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:45,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1070556359, now seen corresponding path program 20 times [2023-08-30 18:54:45,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:45,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951904697] [2023-08-30 18:54:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:45,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:45,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:45,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951904697] [2023-08-30 18:54:45,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951904697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:45,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8795350] [2023-08-30 18:54:45,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:54:45,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:45,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:45,725 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) [2023-08-30 18:54:45,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 18:54:45,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:54:45,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:45,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:54:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:46,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:54:46,061 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 65 treesize of output 41 [2023-08-30 18:54:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:46,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:46,290 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:54:46,291 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 [2023-08-30 18:54:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:46,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8795350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:46,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:46,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-30 18:54:46,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366520702] [2023-08-30 18:54:46,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:46,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 18:54:46,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 18:54:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-08-30 18:54:47,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:54:47,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 284 transitions, 5083 flow. Second operand has 21 states, 21 states have (on average 182.1904761904762) internal successors, (3826), 21 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:47,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:47,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:54:47,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:49,012 INFO L130 PetriNetUnfolder]: 1441/2615 cut-off events. [2023-08-30 18:54:49,012 INFO L131 PetriNetUnfolder]: For 44556/44556 co-relation queries the response was YES. [2023-08-30 18:54:49,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21380 conditions, 2615 events. 1441/2615 cut-off events. For 44556/44556 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 16381 event pairs, 242 based on Foata normal form. 8/2623 useless extension candidates. Maximal degree in co-relation 21234. Up to 897 conditions per place. [2023-08-30 18:54:49,037 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 217 selfloop transitions, 175 changer transitions 10/402 dead transitions. [2023-08-30 18:54:49,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 402 transitions, 7572 flow [2023-08-30 18:54:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:54:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:54:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4072 transitions. [2023-08-30 18:54:49,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37850901654582636 [2023-08-30 18:54:49,041 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4072 transitions. [2023-08-30 18:54:49,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4072 transitions. [2023-08-30 18:54:49,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:49,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4072 transitions. [2023-08-30 18:54:49,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 185.0909090909091) internal successors, (4072), 22 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:49,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:49,098 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:49,098 INFO L175 Difference]: Start difference. First operand has 229 places, 284 transitions, 5083 flow. Second operand 22 states and 4072 transitions. [2023-08-30 18:54:49,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 402 transitions, 7572 flow [2023-08-30 18:54:49,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 402 transitions, 7359 flow, removed 37 selfloop flow, removed 5 redundant places. [2023-08-30 18:54:49,223 INFO L231 Difference]: Finished difference. Result has 249 places, 321 transitions, 5916 flow [2023-08-30 18:54:49,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5916, PETRI_PLACES=249, PETRI_TRANSITIONS=321} [2023-08-30 18:54:49,224 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 226 predicate places. [2023-08-30 18:54:49,224 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 321 transitions, 5916 flow [2023-08-30 18:54:49,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.1904761904762) internal successors, (3826), 21 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:49,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:49,225 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:49,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:49,426 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,SelfDestructingSolverStorable28 [2023-08-30 18:54:49,426 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:49,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash -685105157, now seen corresponding path program 21 times [2023-08-30 18:54:49,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:49,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388126633] [2023-08-30 18:54:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:49,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:49,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:49,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388126633] [2023-08-30 18:54:49,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388126633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:49,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045484994] [2023-08-30 18:54:49,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:54:49,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:49,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:49,905 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) [2023-08-30 18:54:49,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 18:54:50,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:54:50,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:50,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:54:50,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:50,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:50,458 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:54:50,459 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 99 [2023-08-30 18:54:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:50,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045484994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:50,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:50,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-30 18:54:50,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134093354] [2023-08-30 18:54:50,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:50,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:54:50,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:50,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:54:50,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:54:50,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-30 18:54:50,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 321 transitions, 5916 flow. Second operand has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:50,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:50,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-30 18:54:50,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:51,867 INFO L130 PetriNetUnfolder]: 1465/2645 cut-off events. [2023-08-30 18:54:51,867 INFO L131 PetriNetUnfolder]: For 47904/47904 co-relation queries the response was YES. [2023-08-30 18:54:51,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22316 conditions, 2645 events. 1465/2645 cut-off events. For 47904/47904 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 16630 event pairs, 357 based on Foata normal form. 8/2653 useless extension candidates. Maximal degree in co-relation 22166. Up to 1591 conditions per place. [2023-08-30 18:54:51,890 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 228 selfloop transitions, 166 changer transitions 3/397 dead transitions. [2023-08-30 18:54:51,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 397 transitions, 7836 flow [2023-08-30 18:54:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:54:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:54:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2606 transitions. [2023-08-30 18:54:51,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806602395559451 [2023-08-30 18:54:51,893 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2606 transitions. [2023-08-30 18:54:51,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2606 transitions. [2023-08-30 18:54:51,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:51,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2606 transitions. [2023-08-30 18:54:51,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.14285714285714) internal successors, (2606), 14 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:51,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:51,900 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:51,900 INFO L175 Difference]: Start difference. First operand has 249 places, 321 transitions, 5916 flow. Second operand 14 states and 2606 transitions. [2023-08-30 18:54:51,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 397 transitions, 7836 flow [2023-08-30 18:54:52,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 397 transitions, 7655 flow, removed 53 selfloop flow, removed 6 redundant places. [2023-08-30 18:54:52,039 INFO L231 Difference]: Finished difference. Result has 256 places, 327 transitions, 6355 flow [2023-08-30 18:54:52,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=5737, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6355, PETRI_PLACES=256, PETRI_TRANSITIONS=327} [2023-08-30 18:54:52,040 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 233 predicate places. [2023-08-30 18:54:52,040 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 327 transitions, 6355 flow [2023-08-30 18:54:52,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:52,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:52,041 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:52,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:52,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:52,241 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:52,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:52,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1185029791, now seen corresponding path program 22 times [2023-08-30 18:54:52,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:52,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248898714] [2023-08-30 18:54:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:52,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:52,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:52,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248898714] [2023-08-30 18:54:52,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248898714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:52,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63787676] [2023-08-30 18:54:52,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:54:52,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:52,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:52,677 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) [2023-08-30 18:54:52,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 18:54:52,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:54:52,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:52,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:54:52,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:52,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-08-30 18:54:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:53,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:53,182 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:54:53,182 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 [2023-08-30 18:54:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:53,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63787676] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:53,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:53,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-30 18:54:53,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779643430] [2023-08-30 18:54:53,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:53,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 18:54:53,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 18:54:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-30 18:54:53,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 18:54:53,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 327 transitions, 6355 flow. Second operand has 19 states, 19 states have (on average 181.21052631578948) internal successors, (3443), 19 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:53,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:53,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 18:54:53,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:54,678 INFO L130 PetriNetUnfolder]: 1501/2705 cut-off events. [2023-08-30 18:54:54,678 INFO L131 PetriNetUnfolder]: For 53647/53647 co-relation queries the response was YES. [2023-08-30 18:54:54,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23785 conditions, 2705 events. 1501/2705 cut-off events. For 53647/53647 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 17007 event pairs, 387 based on Foata normal form. 8/2713 useless extension candidates. Maximal degree in co-relation 23634. Up to 1627 conditions per place. [2023-08-30 18:54:54,703 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 229 selfloop transitions, 161 changer transitions 3/393 dead transitions. [2023-08-30 18:54:54,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 393 transitions, 8160 flow [2023-08-30 18:54:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:54:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:54:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2032 transitions. [2023-08-30 18:54:54,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37776538390035325 [2023-08-30 18:54:54,711 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2032 transitions. [2023-08-30 18:54:54,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2032 transitions. [2023-08-30 18:54:54,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:54,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2032 transitions. [2023-08-30 18:54:54,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 184.72727272727272) internal successors, (2032), 11 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:54,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:54,715 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:54,715 INFO L175 Difference]: Start difference. First operand has 256 places, 327 transitions, 6355 flow. Second operand 11 states and 2032 transitions. [2023-08-30 18:54:54,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 393 transitions, 8160 flow [2023-08-30 18:54:54,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 393 transitions, 7696 flow, removed 32 selfloop flow, removed 15 redundant places. [2023-08-30 18:54:54,859 INFO L231 Difference]: Finished difference. Result has 253 places, 331 transitions, 6467 flow [2023-08-30 18:54:54,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=5901, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6467, PETRI_PLACES=253, PETRI_TRANSITIONS=331} [2023-08-30 18:54:54,859 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 230 predicate places. [2023-08-30 18:54:54,860 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 331 transitions, 6467 flow [2023-08-30 18:54:54,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 181.21052631578948) internal successors, (3443), 19 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:54,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:54,860 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:54,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:55,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 18:54:55,065 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:55,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:55,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1405470709, now seen corresponding path program 23 times [2023-08-30 18:54:55,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:55,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061584219] [2023-08-30 18:54:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:55,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:55,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:55,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061584219] [2023-08-30 18:54:55,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061584219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:55,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608959087] [2023-08-30 18:54:55,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:54:55,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:55,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:55,570 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) [2023-08-30 18:54:55,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 18:54:55,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:54:55,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:55,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:54:55,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:55,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:56,100 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:54:56,101 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 [2023-08-30 18:54:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:56,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608959087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:56,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:56,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 18:54:56,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740053892] [2023-08-30 18:54:56,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:56,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:54:56,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:56,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:54:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:54:56,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 18:54:56,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 331 transitions, 6467 flow. Second operand has 20 states, 20 states have (on average 181.2) internal successors, (3624), 20 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:56,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:54:56,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 18:54:56,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:54:57,895 INFO L130 PetriNetUnfolder]: 1649/2961 cut-off events. [2023-08-30 18:54:57,895 INFO L131 PetriNetUnfolder]: For 61715/61715 co-relation queries the response was YES. [2023-08-30 18:54:57,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26923 conditions, 2961 events. 1649/2961 cut-off events. For 61715/61715 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 18881 event pairs, 428 based on Foata normal form. 8/2969 useless extension candidates. Maximal degree in co-relation 26776. Up to 2123 conditions per place. [2023-08-30 18:54:57,925 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 195 selfloop transitions, 205 changer transitions 12/412 dead transitions. [2023-08-30 18:54:57,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 412 transitions, 8644 flow [2023-08-30 18:54:57,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:54:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:54:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2034 transitions. [2023-08-30 18:54:57,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3781372002230898 [2023-08-30 18:54:57,927 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2034 transitions. [2023-08-30 18:54:57,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2034 transitions. [2023-08-30 18:54:57,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:54:57,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2034 transitions. [2023-08-30 18:54:57,929 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) [2023-08-30 18:54:57,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:57,931 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:57,932 INFO L175 Difference]: Start difference. First operand has 253 places, 331 transitions, 6467 flow. Second operand 11 states and 2034 transitions. [2023-08-30 18:54:57,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 412 transitions, 8644 flow [2023-08-30 18:54:58,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 412 transitions, 8390 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-08-30 18:54:58,101 INFO L231 Difference]: Finished difference. Result has 261 places, 384 transitions, 8011 flow [2023-08-30 18:54:58,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=6249, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8011, PETRI_PLACES=261, PETRI_TRANSITIONS=384} [2023-08-30 18:54:58,102 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 238 predicate places. [2023-08-30 18:54:58,102 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 384 transitions, 8011 flow [2023-08-30 18:54:58,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.2) internal successors, (3624), 20 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:54:58,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:54:58,103 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:54:58,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 18:54:58,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:58,305 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:54:58,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:54:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1140820281, now seen corresponding path program 24 times [2023-08-30 18:54:58,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:54:58,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248907656] [2023-08-30 18:54:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:54:58,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:54:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:54:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:58,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:54:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248907656] [2023-08-30 18:54:58,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248907656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:54:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237280654] [2023-08-30 18:54:58,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:54:58,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:54:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:54:58,861 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) [2023-08-30 18:54:58,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 18:54:59,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 18:54:59,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:54:59,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 18:54:59,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:54:59,325 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:54:59,325 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 26 treesize of output 14 [2023-08-30 18:54:59,333 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:54:59,333 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 25 treesize of output 9 [2023-08-30 18:54:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:59,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:54:59,816 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:54:59,817 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 [2023-08-30 18:54:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:54:59,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237280654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:54:59,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:54:59,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-08-30 18:54:59,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829475816] [2023-08-30 18:54:59,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:54:59,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:54:59,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:54:59,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:54:59,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:55:00,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-30 18:55:00,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 384 transitions, 8011 flow. Second operand has 22 states, 22 states have (on average 179.13636363636363) internal successors, (3941), 22 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:00,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:00,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-30 18:55:00,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:03,166 INFO L130 PetriNetUnfolder]: 1849/3341 cut-off events. [2023-08-30 18:55:03,167 INFO L131 PetriNetUnfolder]: For 77424/77424 co-relation queries the response was YES. [2023-08-30 18:55:03,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32510 conditions, 3341 events. 1849/3341 cut-off events. For 77424/77424 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 21743 event pairs, 215 based on Foata normal form. 22/3363 useless extension candidates. Maximal degree in co-relation 32358. Up to 1860 conditions per place. [2023-08-30 18:55:03,207 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 276 selfloop transitions, 232 changer transitions 11/519 dead transitions. [2023-08-30 18:55:03,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 519 transitions, 11302 flow [2023-08-30 18:55:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 18:55:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 18:55:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5287 transitions. [2023-08-30 18:55:03,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3728227910584585 [2023-08-30 18:55:03,213 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5287 transitions. [2023-08-30 18:55:03,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5287 transitions. [2023-08-30 18:55:03,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:03,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5287 transitions. [2023-08-30 18:55:03,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 182.31034482758622) internal successors, (5287), 29 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:03,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 489.0) internal successors, (14670), 30 states have internal predecessors, (14670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:03,228 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 489.0) internal successors, (14670), 30 states have internal predecessors, (14670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:03,228 INFO L175 Difference]: Start difference. First operand has 261 places, 384 transitions, 8011 flow. Second operand 29 states and 5287 transitions. [2023-08-30 18:55:03,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 519 transitions, 11302 flow [2023-08-30 18:55:03,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 519 transitions, 11166 flow, removed 38 selfloop flow, removed 6 redundant places. [2023-08-30 18:55:03,567 INFO L231 Difference]: Finished difference. Result has 295 places, 428 transitions, 9774 flow [2023-08-30 18:55:03,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=7913, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9774, PETRI_PLACES=295, PETRI_TRANSITIONS=428} [2023-08-30 18:55:03,567 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 272 predicate places. [2023-08-30 18:55:03,567 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 428 transitions, 9774 flow [2023-08-30 18:55:03,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 179.13636363636363) internal successors, (3941), 22 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:03,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:03,568 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:03,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:03,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:03,768 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:03,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:03,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1611522867, now seen corresponding path program 25 times [2023-08-30 18:55:03,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:03,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889691464] [2023-08-30 18:55:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:03,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:04,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:04,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889691464] [2023-08-30 18:55:04,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889691464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:04,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379037860] [2023-08-30 18:55:04,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:55:04,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:04,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:04,395 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) [2023-08-30 18:55:04,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 18:55:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:04,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:55:04,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:04,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:04,696 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 46 treesize of output 30 [2023-08-30 18:55:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:04,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:04,952 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:55:04,952 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 [2023-08-30 18:55:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:04,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379037860] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:04,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:04,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-30 18:55:04,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963672128] [2023-08-30 18:55:04,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:04,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 18:55:04,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:04,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 18:55:04,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-30 18:55:05,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:55:05,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 428 transitions, 9774 flow. Second operand has 19 states, 19 states have (on average 182.10526315789474) internal successors, (3460), 19 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:05,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:05,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:55:05,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:06,843 INFO L130 PetriNetUnfolder]: 1881/3397 cut-off events. [2023-08-30 18:55:06,843 INFO L131 PetriNetUnfolder]: For 105232/105232 co-relation queries the response was YES. [2023-08-30 18:55:06,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37027 conditions, 3397 events. 1881/3397 cut-off events. For 105232/105232 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 22279 event pairs, 423 based on Foata normal form. 8/3405 useless extension candidates. Maximal degree in co-relation 36862. Up to 1965 conditions per place. [2023-08-30 18:55:06,894 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 265 selfloop transitions, 212 changer transitions 4/481 dead transitions. [2023-08-30 18:55:06,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 481 transitions, 11698 flow [2023-08-30 18:55:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:55:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:55:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2409 transitions. [2023-08-30 18:55:06,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37895233600755074 [2023-08-30 18:55:06,896 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2409 transitions. [2023-08-30 18:55:06,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2409 transitions. [2023-08-30 18:55:06,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:06,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2409 transitions. [2023-08-30 18:55:06,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.30769230769232) internal successors, (2409), 13 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:06,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:06,973 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:06,973 INFO L175 Difference]: Start difference. First operand has 295 places, 428 transitions, 9774 flow. Second operand 13 states and 2409 transitions. [2023-08-30 18:55:06,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 481 transitions, 11698 flow [2023-08-30 18:55:07,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 481 transitions, 10845 flow, removed 300 selfloop flow, removed 8 redundant places. [2023-08-30 18:55:07,286 INFO L231 Difference]: Finished difference. Result has 300 places, 434 transitions, 9588 flow [2023-08-30 18:55:07,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=8991, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9588, PETRI_PLACES=300, PETRI_TRANSITIONS=434} [2023-08-30 18:55:07,286 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 277 predicate places. [2023-08-30 18:55:07,286 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 434 transitions, 9588 flow [2023-08-30 18:55:07,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.10526315789474) internal successors, (3460), 19 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:07,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:07,287 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:07,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:07,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:07,488 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:07,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2084366075, now seen corresponding path program 26 times [2023-08-30 18:55:07,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:07,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051183994] [2023-08-30 18:55:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:07,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:07,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:07,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051183994] [2023-08-30 18:55:07,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051183994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:07,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483594822] [2023-08-30 18:55:07,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:55:07,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:07,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:07,961 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) [2023-08-30 18:55:07,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 18:55:08,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:55:08,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:08,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:55:08,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:08,280 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:08,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-30 18:55:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:08,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:08,562 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:55:08,562 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 [2023-08-30 18:55:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:08,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483594822] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:08,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:08,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 18:55:08,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970502586] [2023-08-30 18:55:08,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:08,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:55:08,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:08,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:55:08,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:55:09,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:55:09,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 434 transitions, 9588 flow. Second operand has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:09,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:09,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:55:09,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:10,731 INFO L130 PetriNetUnfolder]: 1849/3325 cut-off events. [2023-08-30 18:55:10,732 INFO L131 PetriNetUnfolder]: For 98590/98590 co-relation queries the response was YES. [2023-08-30 18:55:10,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35889 conditions, 3325 events. 1849/3325 cut-off events. For 98590/98590 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 21585 event pairs, 411 based on Foata normal form. 8/3333 useless extension candidates. Maximal degree in co-relation 35724. Up to 2021 conditions per place. [2023-08-30 18:55:10,765 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 269 selfloop transitions, 195 changer transitions 10/474 dead transitions. [2023-08-30 18:55:10,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 474 transitions, 11143 flow [2023-08-30 18:55:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:55:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:55:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2595 transitions. [2023-08-30 18:55:10,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790534618755478 [2023-08-30 18:55:10,767 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2595 transitions. [2023-08-30 18:55:10,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2595 transitions. [2023-08-30 18:55:10,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:10,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2595 transitions. [2023-08-30 18:55:10,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.35714285714286) internal successors, (2595), 14 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:10,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:10,772 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:10,772 INFO L175 Difference]: Start difference. First operand has 300 places, 434 transitions, 9588 flow. Second operand 14 states and 2595 transitions. [2023-08-30 18:55:10,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 474 transitions, 11143 flow [2023-08-30 18:55:11,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 474 transitions, 10925 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-08-30 18:55:11,043 INFO L231 Difference]: Finished difference. Result has 304 places, 428 transitions, 9632 flow [2023-08-30 18:55:11,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=9282, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9632, PETRI_PLACES=304, PETRI_TRANSITIONS=428} [2023-08-30 18:55:11,044 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 281 predicate places. [2023-08-30 18:55:11,044 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 428 transitions, 9632 flow [2023-08-30 18:55:11,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:11,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:11,045 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:11,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:11,245 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,SelfDestructingSolverStorable34 [2023-08-30 18:55:11,245 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:11,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:11,246 INFO L85 PathProgramCache]: Analyzing trace with hash -691507321, now seen corresponding path program 27 times [2023-08-30 18:55:11,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:11,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920477712] [2023-08-30 18:55:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:11,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:11,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:11,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920477712] [2023-08-30 18:55:11,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920477712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:11,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863767811] [2023-08-30 18:55:11,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:55:11,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:11,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:11,723 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) [2023-08-30 18:55:11,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 18:55:12,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 18:55:12,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:55:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:12,178 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:55:12,179 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 26 treesize of output 14 [2023-08-30 18:55:12,187 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:55:12,188 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 25 treesize of output 9 [2023-08-30 18:55:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:12,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:12,423 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:55:12,423 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 99 [2023-08-30 18:55:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:12,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863767811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:12,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:12,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 18:55:12,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224699010] [2023-08-30 18:55:12,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:12,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:55:12,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:55:12,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:55:13,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:55:13,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 428 transitions, 9632 flow. Second operand has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:13,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:13,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:55:13,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:15,089 INFO L130 PetriNetUnfolder]: 1965/3527 cut-off events. [2023-08-30 18:55:15,089 INFO L131 PetriNetUnfolder]: For 113301/113301 co-relation queries the response was YES. [2023-08-30 18:55:15,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39494 conditions, 3527 events. 1965/3527 cut-off events. For 113301/113301 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 23198 event pairs, 373 based on Foata normal form. 8/3535 useless extension candidates. Maximal degree in co-relation 39328. Up to 1855 conditions per place. [2023-08-30 18:55:15,131 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 285 selfloop transitions, 233 changer transitions 8/526 dead transitions. [2023-08-30 18:55:15,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 526 transitions, 12459 flow [2023-08-30 18:55:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:55:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:55:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4072 transitions. [2023-08-30 18:55:15,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37850901654582636 [2023-08-30 18:55:15,135 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4072 transitions. [2023-08-30 18:55:15,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4072 transitions. [2023-08-30 18:55:15,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:15,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4072 transitions. [2023-08-30 18:55:15,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 185.0909090909091) internal successors, (4072), 22 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:15,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:15,142 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:15,142 INFO L175 Difference]: Start difference. First operand has 304 places, 428 transitions, 9632 flow. Second operand 22 states and 4072 transitions. [2023-08-30 18:55:15,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 526 transitions, 12459 flow [2023-08-30 18:55:15,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 526 transitions, 12044 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-08-30 18:55:15,483 INFO L231 Difference]: Finished difference. Result has 314 places, 445 transitions, 10356 flow [2023-08-30 18:55:15,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=9237, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10356, PETRI_PLACES=314, PETRI_TRANSITIONS=445} [2023-08-30 18:55:15,484 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 291 predicate places. [2023-08-30 18:55:15,484 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 445 transitions, 10356 flow [2023-08-30 18:55:15,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:15,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:15,485 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:15,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:15,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 18:55:15,685 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:15,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash 844197721, now seen corresponding path program 28 times [2023-08-30 18:55:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:15,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141235108] [2023-08-30 18:55:15,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:15,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:16,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:16,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141235108] [2023-08-30 18:55:16,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141235108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:16,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964434547] [2023-08-30 18:55:16,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:55:16,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:16,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:16,179 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) [2023-08-30 18:55:16,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 18:55:16,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:55:16,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:16,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:55:16,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:16,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:16,751 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:55:16,751 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 [2023-08-30 18:55:16,773 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:55:16,774 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 [2023-08-30 18:55:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:16,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964434547] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:16,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:16,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-30 18:55:16,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229446520] [2023-08-30 18:55:16,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:16,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:55:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:55:16,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:55:17,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-30 18:55:17,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 445 transitions, 10356 flow. Second operand has 18 states, 18 states have (on average 183.16666666666666) internal successors, (3297), 18 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:17,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:17,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-30 18:55:17,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:18,635 INFO L130 PetriNetUnfolder]: 1999/3575 cut-off events. [2023-08-30 18:55:18,635 INFO L131 PetriNetUnfolder]: For 124328/124328 co-relation queries the response was YES. [2023-08-30 18:55:18,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41059 conditions, 3575 events. 1999/3575 cut-off events. For 124328/124328 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 23496 event pairs, 424 based on Foata normal form. 8/3583 useless extension candidates. Maximal degree in co-relation 40888. Up to 2041 conditions per place. [2023-08-30 18:55:18,675 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 267 selfloop transitions, 222 changer transitions 3/492 dead transitions. [2023-08-30 18:55:18,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 492 transitions, 12199 flow [2023-08-30 18:55:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:55:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:55:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2235 transitions. [2023-08-30 18:55:18,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38087934560327197 [2023-08-30 18:55:18,678 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2235 transitions. [2023-08-30 18:55:18,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2235 transitions. [2023-08-30 18:55:18,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:18,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2235 transitions. [2023-08-30 18:55:18,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.25) internal successors, (2235), 12 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:18,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:18,682 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:18,682 INFO L175 Difference]: Start difference. First operand has 314 places, 445 transitions, 10356 flow. Second operand 12 states and 2235 transitions. [2023-08-30 18:55:18,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 492 transitions, 12199 flow [2023-08-30 18:55:19,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 492 transitions, 11858 flow, removed 102 selfloop flow, removed 9 redundant places. [2023-08-30 18:55:19,067 INFO L231 Difference]: Finished difference. Result has 317 places, 448 transitions, 10781 flow [2023-08-30 18:55:19,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=10019, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10781, PETRI_PLACES=317, PETRI_TRANSITIONS=448} [2023-08-30 18:55:19,068 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 294 predicate places. [2023-08-30 18:55:19,068 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 448 transitions, 10781 flow [2023-08-30 18:55:19,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.16666666666666) internal successors, (3297), 18 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:19,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:19,068 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:19,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:19,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:19,269 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:19,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:19,269 INFO L85 PathProgramCache]: Analyzing trace with hash 799988211, now seen corresponding path program 29 times [2023-08-30 18:55:19,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:19,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962691653] [2023-08-30 18:55:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:19,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:19,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:19,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962691653] [2023-08-30 18:55:19,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962691653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:19,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593159673] [2023-08-30 18:55:19,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:55:19,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:19,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:19,744 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) [2023-08-30 18:55:19,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 18:55:19,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:55:19,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:19,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 18:55:19,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:20,099 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-08-30 18:55:20,100 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 26 treesize of output 19 [2023-08-30 18:55:20,107 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 18:55:20,107 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 25 treesize of output 9 [2023-08-30 18:55:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:20,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:20,310 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:55:20,310 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 [2023-08-30 18:55:20,342 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:55:20,343 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 [2023-08-30 18:55:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:20,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593159673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:20,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:20,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-08-30 18:55:20,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130848515] [2023-08-30 18:55:20,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:20,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:55:20,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:55:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:55:21,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:55:21,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 448 transitions, 10781 flow. Second operand has 23 states, 23 states have (on average 182.17391304347825) internal successors, (4190), 23 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:21,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:21,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:55:21,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:22,674 INFO L130 PetriNetUnfolder]: 2059/3687 cut-off events. [2023-08-30 18:55:22,674 INFO L131 PetriNetUnfolder]: For 136792/136792 co-relation queries the response was YES. [2023-08-30 18:55:22,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43416 conditions, 3687 events. 2059/3687 cut-off events. For 136792/136792 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 24423 event pairs, 421 based on Foata normal form. 8/3695 useless extension candidates. Maximal degree in co-relation 43242. Up to 1999 conditions per place. [2023-08-30 18:55:22,720 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 278 selfloop transitions, 235 changer transitions 5/518 dead transitions. [2023-08-30 18:55:22,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 518 transitions, 13092 flow [2023-08-30 18:55:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 18:55:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 18:55:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3149 transitions. [2023-08-30 18:55:22,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37880428244917597 [2023-08-30 18:55:22,722 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3149 transitions. [2023-08-30 18:55:22,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3149 transitions. [2023-08-30 18:55:22,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:22,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3149 transitions. [2023-08-30 18:55:22,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 185.23529411764707) internal successors, (3149), 17 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:22,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:22,729 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:22,730 INFO L175 Difference]: Start difference. First operand has 317 places, 448 transitions, 10781 flow. Second operand 17 states and 3149 transitions. [2023-08-30 18:55:22,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 518 transitions, 13092 flow [2023-08-30 18:55:23,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 518 transitions, 12991 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-08-30 18:55:23,186 INFO L231 Difference]: Finished difference. Result has 330 places, 455 transitions, 11443 flow [2023-08-30 18:55:23,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=10686, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=11443, PETRI_PLACES=330, PETRI_TRANSITIONS=455} [2023-08-30 18:55:23,187 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 307 predicate places. [2023-08-30 18:55:23,187 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 455 transitions, 11443 flow [2023-08-30 18:55:23,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 182.17391304347825) internal successors, (4190), 23 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:23,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:23,188 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:23,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:23,394 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,SelfDestructingSolverStorable37 [2023-08-30 18:55:23,394 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:23,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:23,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1064638639, now seen corresponding path program 30 times [2023-08-30 18:55:23,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:23,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842991691] [2023-08-30 18:55:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:23,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:23,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:23,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842991691] [2023-08-30 18:55:23,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842991691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:23,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362351262] [2023-08-30 18:55:23,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:55:23,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:23,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:23,892 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) [2023-08-30 18:55:23,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 18:55:24,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:55:24,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:24,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:55:24,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:24,266 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:55:24,266 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 60 treesize of output 32 [2023-08-30 18:55:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:24,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:24,413 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:55:24,413 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 [2023-08-30 18:55:24,429 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:55:24,430 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 [2023-08-30 18:55:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:24,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362351262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:24,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:24,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-30 18:55:24,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868827206] [2023-08-30 18:55:24,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:24,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 18:55:24,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:24,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 18:55:24,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-08-30 18:55:24,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:55:24,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 455 transitions, 11443 flow. Second operand has 19 states, 19 states have (on average 182.31578947368422) internal successors, (3464), 19 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:24,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:24,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:55:24,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:26,147 INFO L130 PetriNetUnfolder]: 2051/3679 cut-off events. [2023-08-30 18:55:26,147 INFO L131 PetriNetUnfolder]: For 143063/143063 co-relation queries the response was YES. [2023-08-30 18:55:26,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44417 conditions, 3679 events. 2051/3679 cut-off events. For 143063/143063 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 24514 event pairs, 552 based on Foata normal form. 8/3687 useless extension candidates. Maximal degree in co-relation 44240. Up to 2647 conditions per place. [2023-08-30 18:55:26,197 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 219 selfloop transitions, 251 changer transitions 11/481 dead transitions. [2023-08-30 18:55:26,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 481 transitions, 12663 flow [2023-08-30 18:55:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:55:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:55:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2044 transitions. [2023-08-30 18:55:26,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37999628183677264 [2023-08-30 18:55:26,199 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2044 transitions. [2023-08-30 18:55:26,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2044 transitions. [2023-08-30 18:55:26,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:26,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2044 transitions. [2023-08-30 18:55:26,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.8181818181818) internal successors, (2044), 11 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:26,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:26,202 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:26,203 INFO L175 Difference]: Start difference. First operand has 330 places, 455 transitions, 11443 flow. Second operand 11 states and 2044 transitions. [2023-08-30 18:55:26,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 481 transitions, 12663 flow [2023-08-30 18:55:26,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 481 transitions, 12415 flow, removed 44 selfloop flow, removed 10 redundant places. [2023-08-30 18:55:26,629 INFO L231 Difference]: Finished difference. Result has 333 places, 456 transitions, 11945 flow [2023-08-30 18:55:26,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11195, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11945, PETRI_PLACES=333, PETRI_TRANSITIONS=456} [2023-08-30 18:55:26,630 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 310 predicate places. [2023-08-30 18:55:26,630 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 456 transitions, 11945 flow [2023-08-30 18:55:26,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.31578947368422) internal successors, (3464), 19 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:26,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:26,631 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:26,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:26,831 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,SelfDestructingSolverStorable38 [2023-08-30 18:55:26,831 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:26,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:26,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1348808325, now seen corresponding path program 31 times [2023-08-30 18:55:26,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:26,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052116356] [2023-08-30 18:55:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:26,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:27,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:27,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052116356] [2023-08-30 18:55:27,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052116356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:27,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756217215] [2023-08-30 18:55:27,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:55:27,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:27,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:27,303 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) [2023-08-30 18:55:27,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 18:55:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:27,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:55:27,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:27,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:27,634 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 46 treesize of output 30 [2023-08-30 18:55:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:27,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:27,871 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:55:27,871 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 [2023-08-30 18:55:27,888 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:55:27,889 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 [2023-08-30 18:55:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:27,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756217215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:27,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:27,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-30 18:55:27,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514307075] [2023-08-30 18:55:27,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:27,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 18:55:27,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:27,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 18:55:27,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-30 18:55:28,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:55:28,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 456 transitions, 11945 flow. Second operand has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:28,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:28,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:55:28,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:29,925 INFO L130 PetriNetUnfolder]: 2085/3731 cut-off events. [2023-08-30 18:55:29,925 INFO L131 PetriNetUnfolder]: For 154641/154641 co-relation queries the response was YES. [2023-08-30 18:55:29,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46647 conditions, 3731 events. 2085/3731 cut-off events. For 154641/154641 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 24828 event pairs, 428 based on Foata normal form. 8/3739 useless extension candidates. Maximal degree in co-relation 46466. Up to 2059 conditions per place. [2023-08-30 18:55:30,061 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 265 selfloop transitions, 241 changer transitions 3/509 dead transitions. [2023-08-30 18:55:30,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 509 transitions, 13900 flow [2023-08-30 18:55:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:55:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:55:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2596 transitions. [2023-08-30 18:55:30,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791995325737657 [2023-08-30 18:55:30,063 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2596 transitions. [2023-08-30 18:55:30,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2596 transitions. [2023-08-30 18:55:30,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:30,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2596 transitions. [2023-08-30 18:55:30,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.42857142857142) internal successors, (2596), 14 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:30,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:30,068 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:30,068 INFO L175 Difference]: Start difference. First operand has 333 places, 456 transitions, 11945 flow. Second operand 14 states and 2596 transitions. [2023-08-30 18:55:30,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 509 transitions, 13900 flow [2023-08-30 18:55:30,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 509 transitions, 13707 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-30 18:55:30,513 INFO L231 Difference]: Finished difference. Result has 339 places, 462 transitions, 12446 flow [2023-08-30 18:55:30,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11758, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12446, PETRI_PLACES=339, PETRI_TRANSITIONS=462} [2023-08-30 18:55:30,514 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 316 predicate places. [2023-08-30 18:55:30,515 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 462 transitions, 12446 flow [2023-08-30 18:55:30,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:30,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:30,516 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:30,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:30,722 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,SelfDestructingSolverStorable39 [2023-08-30 18:55:30,722 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:30,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:30,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1869769151, now seen corresponding path program 32 times [2023-08-30 18:55:30,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:30,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180764165] [2023-08-30 18:55:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:30,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:31,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:31,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180764165] [2023-08-30 18:55:31,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180764165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:31,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263062007] [2023-08-30 18:55:31,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:55:31,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:31,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:31,160 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) [2023-08-30 18:55:31,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 18:55:31,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:55:31,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:31,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:55:31,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:31,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:31,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-30 18:55:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:31,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:31,805 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:55:31,805 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 [2023-08-30 18:55:31,820 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:55:31,821 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 [2023-08-30 18:55:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:31,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263062007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:31,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:31,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 18:55:31,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572343818] [2023-08-30 18:55:31,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:31,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:55:31,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:31,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:55:31,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:55:32,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-30 18:55:32,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 462 transitions, 12446 flow. Second operand has 20 states, 20 states have (on average 183.3) internal successors, (3666), 20 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:32,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:32,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-30 18:55:32,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:33,752 INFO L130 PetriNetUnfolder]: 2065/3691 cut-off events. [2023-08-30 18:55:33,752 INFO L131 PetriNetUnfolder]: For 159420/159420 co-relation queries the response was YES. [2023-08-30 18:55:33,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47286 conditions, 3691 events. 2065/3691 cut-off events. For 159420/159420 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 24413 event pairs, 456 based on Foata normal form. 8/3699 useless extension candidates. Maximal degree in co-relation 47104. Up to 2213 conditions per place. [2023-08-30 18:55:33,804 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 273 selfloop transitions, 224 changer transitions 9/506 dead transitions. [2023-08-30 18:55:33,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 506 transitions, 14178 flow [2023-08-30 18:55:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:55:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:55:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2427 transitions. [2023-08-30 18:55:33,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38178386031146766 [2023-08-30 18:55:33,807 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2427 transitions. [2023-08-30 18:55:33,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2427 transitions. [2023-08-30 18:55:33,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:33,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2427 transitions. [2023-08-30 18:55:33,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 186.69230769230768) internal successors, (2427), 13 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:33,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:33,813 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:33,813 INFO L175 Difference]: Start difference. First operand has 339 places, 462 transitions, 12446 flow. Second operand 13 states and 2427 transitions. [2023-08-30 18:55:33,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 506 transitions, 14178 flow [2023-08-30 18:55:34,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 506 transitions, 13682 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-08-30 18:55:34,322 INFO L231 Difference]: Finished difference. Result has 340 places, 459 transitions, 12344 flow [2023-08-30 18:55:34,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11914, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12344, PETRI_PLACES=340, PETRI_TRANSITIONS=459} [2023-08-30 18:55:34,322 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 317 predicate places. [2023-08-30 18:55:34,322 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 459 transitions, 12344 flow [2023-08-30 18:55:34,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 183.3) internal successors, (3666), 20 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:34,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:34,323 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:34,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:34,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:34,524 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:34,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash 499274341, now seen corresponding path program 33 times [2023-08-30 18:55:34,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:34,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029583299] [2023-08-30 18:55:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:34,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:35,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:35,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029583299] [2023-08-30 18:55:35,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029583299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:35,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626593734] [2023-08-30 18:55:35,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:55:35,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:35,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:35,051 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) [2023-08-30 18:55:35,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 18:55:35,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:55:35,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:35,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:55:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:35,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:35,426 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 46 treesize of output 30 [2023-08-30 18:55:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:35,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:35,640 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:55:35,641 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 [2023-08-30 18:55:35,656 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:55:35,657 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 [2023-08-30 18:55:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:35,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626593734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:35,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:35,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 18:55:35,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538711708] [2023-08-30 18:55:35,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:35,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:55:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:55:35,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:55:36,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:55:36,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 459 transitions, 12344 flow. Second operand has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:36,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:36,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:55:36,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:37,961 INFO L130 PetriNetUnfolder]: 2033/3621 cut-off events. [2023-08-30 18:55:37,961 INFO L131 PetriNetUnfolder]: For 159876/159876 co-relation queries the response was YES. [2023-08-30 18:55:37,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46924 conditions, 3621 events. 2033/3621 cut-off events. For 159876/159876 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 23755 event pairs, 446 based on Foata normal form. 8/3629 useless extension candidates. Maximal degree in co-relation 46742. Up to 2191 conditions per place. [2023-08-30 18:55:38,005 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 258 selfloop transitions, 234 changer transitions 7/499 dead transitions. [2023-08-30 18:55:38,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 499 transitions, 13997 flow [2023-08-30 18:55:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 18:55:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 18:55:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2957 transitions. [2023-08-30 18:55:38,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.377939672801636 [2023-08-30 18:55:38,008 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2957 transitions. [2023-08-30 18:55:38,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2957 transitions. [2023-08-30 18:55:38,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:38,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2957 transitions. [2023-08-30 18:55:38,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 184.8125) internal successors, (2957), 16 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:38,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:38,014 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:38,014 INFO L175 Difference]: Start difference. First operand has 340 places, 459 transitions, 12344 flow. Second operand 16 states and 2957 transitions. [2023-08-30 18:55:38,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 499 transitions, 13997 flow [2023-08-30 18:55:38,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 499 transitions, 13742 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-08-30 18:55:38,613 INFO L231 Difference]: Finished difference. Result has 343 places, 456 transitions, 12522 flow [2023-08-30 18:55:38,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=12066, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12522, PETRI_PLACES=343, PETRI_TRANSITIONS=456} [2023-08-30 18:55:38,613 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 320 predicate places. [2023-08-30 18:55:38,613 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 456 transitions, 12522 flow [2023-08-30 18:55:38,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:38,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:38,614 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:38,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:38,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:38,815 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:38,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:38,815 INFO L85 PathProgramCache]: Analyzing trace with hash -675003441, now seen corresponding path program 34 times [2023-08-30 18:55:38,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:38,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70622823] [2023-08-30 18:55:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:38,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:39,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:39,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70622823] [2023-08-30 18:55:39,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70622823] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:39,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992400065] [2023-08-30 18:55:39,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:55:39,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:39,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:39,247 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) [2023-08-30 18:55:39,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 18:55:39,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:55:39,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:39,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:55:39,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:39,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:39,814 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:55:39,814 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 99 [2023-08-30 18:55:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:39,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992400065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:39,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:39,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-30 18:55:39,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620602914] [2023-08-30 18:55:39,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:39,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 18:55:39,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:39,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 18:55:39,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-08-30 18:55:40,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-30 18:55:40,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 456 transitions, 12522 flow. Second operand has 19 states, 19 states have (on average 183.1578947368421) internal successors, (3480), 19 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:40,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:40,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-30 18:55:40,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:41,992 INFO L130 PetriNetUnfolder]: 2095/3699 cut-off events. [2023-08-30 18:55:41,992 INFO L131 PetriNetUnfolder]: For 169096/169096 co-relation queries the response was YES. [2023-08-30 18:55:42,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49217 conditions, 3699 events. 2095/3699 cut-off events. For 169096/169096 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 24098 event pairs, 381 based on Foata normal form. 8/3707 useless extension candidates. Maximal degree in co-relation 49036. Up to 1965 conditions per place. [2023-08-30 18:55:42,047 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 273 selfloop transitions, 245 changer transitions 3/521 dead transitions. [2023-08-30 18:55:42,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 521 transitions, 14795 flow [2023-08-30 18:55:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 18:55:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 18:55:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2976 transitions. [2023-08-30 18:55:42,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803680981595092 [2023-08-30 18:55:42,050 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2976 transitions. [2023-08-30 18:55:42,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2976 transitions. [2023-08-30 18:55:42,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:42,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2976 transitions. [2023-08-30 18:55:42,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:42,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:42,057 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:42,057 INFO L175 Difference]: Start difference. First operand has 343 places, 456 transitions, 12522 flow. Second operand 16 states and 2976 transitions. [2023-08-30 18:55:42,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 521 transitions, 14795 flow [2023-08-30 18:55:42,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 521 transitions, 14261 flow, removed 73 selfloop flow, removed 14 redundant places. [2023-08-30 18:55:42,588 INFO L231 Difference]: Finished difference. Result has 343 places, 463 transitions, 13048 flow [2023-08-30 18:55:42,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11965, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13048, PETRI_PLACES=343, PETRI_TRANSITIONS=463} [2023-08-30 18:55:42,589 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 320 predicate places. [2023-08-30 18:55:42,590 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 463 transitions, 13048 flow [2023-08-30 18:55:42,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 183.1578947368421) internal successors, (3480), 19 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:42,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:42,590 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:42,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:42,796 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,SelfDestructingSolverStorable42 [2023-08-30 18:55:42,797 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:42,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:42,797 INFO L85 PathProgramCache]: Analyzing trace with hash 865501411, now seen corresponding path program 35 times [2023-08-30 18:55:42,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:42,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433535667] [2023-08-30 18:55:42,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:42,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:43,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:43,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433535667] [2023-08-30 18:55:43,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433535667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:43,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606918468] [2023-08-30 18:55:43,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:55:43,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:43,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:43,205 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) [2023-08-30 18:55:43,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 18:55:43,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:55:43,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:43,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:55:43,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:43,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:43,701 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:55:43,702 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 70 [2023-08-30 18:55:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:43,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606918468] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:43,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:43,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-30 18:55:43,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877407954] [2023-08-30 18:55:43,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:43,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:55:43,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:55:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:55:44,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-30 18:55:44,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 463 transitions, 13048 flow. Second operand has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:44,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:44,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-30 18:55:44,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:45,620 INFO L130 PetriNetUnfolder]: 2173/3831 cut-off events. [2023-08-30 18:55:45,621 INFO L131 PetriNetUnfolder]: For 179248/179248 co-relation queries the response was YES. [2023-08-30 18:55:45,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51161 conditions, 3831 events. 2173/3831 cut-off events. For 179248/179248 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 25149 event pairs, 88 based on Foata normal form. 8/3839 useless extension candidates. Maximal degree in co-relation 50980. Up to 1274 conditions per place. [2023-08-30 18:55:45,670 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 157 selfloop transitions, 398 changer transitions 5/560 dead transitions. [2023-08-30 18:55:45,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 560 transitions, 16317 flow [2023-08-30 18:55:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:55:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:55:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2426 transitions. [2023-08-30 18:55:45,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3816265534056945 [2023-08-30 18:55:45,672 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2426 transitions. [2023-08-30 18:55:45,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2426 transitions. [2023-08-30 18:55:45,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:45,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2426 transitions. [2023-08-30 18:55:45,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 186.6153846153846) internal successors, (2426), 13 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:45,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:45,679 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:45,679 INFO L175 Difference]: Start difference. First operand has 343 places, 463 transitions, 13048 flow. Second operand 13 states and 2426 transitions. [2023-08-30 18:55:45,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 560 transitions, 16317 flow [2023-08-30 18:55:46,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 560 transitions, 16136 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-08-30 18:55:46,182 INFO L231 Difference]: Finished difference. Result has 345 places, 499 transitions, 14982 flow [2023-08-30 18:55:46,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=12881, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14982, PETRI_PLACES=345, PETRI_TRANSITIONS=499} [2023-08-30 18:55:46,183 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 322 predicate places. [2023-08-30 18:55:46,183 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 499 transitions, 14982 flow [2023-08-30 18:55:46,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:46,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:46,184 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:46,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:46,384 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,SelfDestructingSolverStorable43 [2023-08-30 18:55:46,384 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:46,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:46,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1844566953, now seen corresponding path program 36 times [2023-08-30 18:55:46,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:46,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522453758] [2023-08-30 18:55:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:46,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:47,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:47,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522453758] [2023-08-30 18:55:47,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522453758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:47,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52550171] [2023-08-30 18:55:47,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:55:47,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:47,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:47,150 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) [2023-08-30 18:55:47,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 18:55:47,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 18:55:47,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:55:47,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:55:47,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:47,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:55:47,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:55:47,680 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:55:47,680 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 39 treesize of output 40 [2023-08-30 18:55:47,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:47,800 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 65 treesize of output 41 [2023-08-30 18:55:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:47,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:48,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:48,147 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 94 treesize of output 130 [2023-08-30 18:55:48,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:48,156 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 [2023-08-30 18:55:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:48,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52550171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:48,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:48,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 18:55:48,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558814105] [2023-08-30 18:55:48,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:48,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 18:55:48,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:48,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 18:55:48,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=862, Unknown=4, NotChecked=0, Total=992 [2023-08-30 18:55:49,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 489 [2023-08-30 18:55:49,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 499 transitions, 14982 flow. Second operand has 32 states, 32 states have (on average 156.71875) internal successors, (5015), 32 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:49,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:49,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 489 [2023-08-30 18:55:49,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:51,750 INFO L130 PetriNetUnfolder]: 2197/3883 cut-off events. [2023-08-30 18:55:51,750 INFO L131 PetriNetUnfolder]: For 185761/185761 co-relation queries the response was YES. [2023-08-30 18:55:51,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53476 conditions, 3883 events. 2197/3883 cut-off events. For 185761/185761 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 25564 event pairs, 154 based on Foata normal form. 8/3891 useless extension candidates. Maximal degree in co-relation 53292. Up to 1298 conditions per place. [2023-08-30 18:55:51,806 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 270 selfloop transitions, 294 changer transitions 10/574 dead transitions. [2023-08-30 18:55:51,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 574 transitions, 17441 flow [2023-08-30 18:55:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:55:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:55:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2418 transitions. [2023-08-30 18:55:51,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296523517382413 [2023-08-30 18:55:51,809 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2418 transitions. [2023-08-30 18:55:51,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2418 transitions. [2023-08-30 18:55:51,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:51,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2418 transitions. [2023-08-30 18:55:51,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 161.2) internal successors, (2418), 15 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:51,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:51,816 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:51,816 INFO L175 Difference]: Start difference. First operand has 345 places, 499 transitions, 14982 flow. Second operand 15 states and 2418 transitions. [2023-08-30 18:55:51,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 574 transitions, 17441 flow [2023-08-30 18:55:52,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 574 transitions, 16902 flow, removed 138 selfloop flow, removed 12 redundant places. [2023-08-30 18:55:52,576 INFO L231 Difference]: Finished difference. Result has 347 places, 506 transitions, 15331 flow [2023-08-30 18:55:52,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=14467, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15331, PETRI_PLACES=347, PETRI_TRANSITIONS=506} [2023-08-30 18:55:52,577 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 324 predicate places. [2023-08-30 18:55:52,577 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 506 transitions, 15331 flow [2023-08-30 18:55:52,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.71875) internal successors, (5015), 32 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:52,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:52,578 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:52,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:52,780 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,SelfDestructingSolverStorable44 [2023-08-30 18:55:52,780 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:52,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:52,780 INFO L85 PathProgramCache]: Analyzing trace with hash -747080383, now seen corresponding path program 37 times [2023-08-30 18:55:52,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:52,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113875224] [2023-08-30 18:55:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:52,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:53,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:55:53,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113875224] [2023-08-30 18:55:53,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113875224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:55:53,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583822757] [2023-08-30 18:55:53,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:55:53,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:55:53,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:55:53,624 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) [2023-08-30 18:55:53,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 18:55:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:55:53,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 18:55:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:55:54,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:55:54,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:55:54,103 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:55:54,103 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 20 treesize of output 25 [2023-08-30 18:55:54,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:54,247 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 46 treesize of output 30 [2023-08-30 18:55:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:54,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:55:54,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:54,566 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 94 treesize of output 130 [2023-08-30 18:55:54,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:55:54,575 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 [2023-08-30 18:55:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:55:54,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583822757] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:55:54,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:55:54,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-08-30 18:55:54,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047251505] [2023-08-30 18:55:54,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:55:54,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 18:55:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:55:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 18:55:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=994, Unknown=3, NotChecked=0, Total=1122 [2023-08-30 18:55:55,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 489 [2023-08-30 18:55:55,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 506 transitions, 15331 flow. Second operand has 34 states, 34 states have (on average 153.76470588235293) internal successors, (5228), 34 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:55,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:55:55,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 489 [2023-08-30 18:55:55,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:55:58,411 INFO L130 PetriNetUnfolder]: 2177/3843 cut-off events. [2023-08-30 18:55:58,411 INFO L131 PetriNetUnfolder]: For 187407/187407 co-relation queries the response was YES. [2023-08-30 18:55:58,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53158 conditions, 3843 events. 2177/3843 cut-off events. For 187407/187407 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 25269 event pairs, 132 based on Foata normal form. 8/3851 useless extension candidates. Maximal degree in co-relation 52984. Up to 1274 conditions per place. [2023-08-30 18:55:58,462 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 240 selfloop transitions, 322 changer transitions 14/576 dead transitions. [2023-08-30 18:55:58,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 576 transitions, 17498 flow [2023-08-30 18:55:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 18:55:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 18:55:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3148 transitions. [2023-08-30 18:55:58,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32188139059304705 [2023-08-30 18:55:58,465 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3148 transitions. [2023-08-30 18:55:58,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3148 transitions. [2023-08-30 18:55:58,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:55:58,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3148 transitions. [2023-08-30 18:55:58,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 157.4) internal successors, (3148), 20 states have internal predecessors, (3148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:58,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:58,471 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:58,471 INFO L175 Difference]: Start difference. First operand has 347 places, 506 transitions, 15331 flow. Second operand 20 states and 3148 transitions. [2023-08-30 18:55:58,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 576 transitions, 17498 flow [2023-08-30 18:55:59,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 576 transitions, 16900 flow, removed 16 selfloop flow, removed 9 redundant places. [2023-08-30 18:55:59,183 INFO L231 Difference]: Finished difference. Result has 357 places, 508 transitions, 15483 flow [2023-08-30 18:55:59,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=14692, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15483, PETRI_PLACES=357, PETRI_TRANSITIONS=508} [2023-08-30 18:55:59,184 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 334 predicate places. [2023-08-30 18:55:59,184 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 508 transitions, 15483 flow [2023-08-30 18:55:59,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 153.76470588235293) internal successors, (5228), 34 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:55:59,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:55:59,185 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:55:59,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 18:55:59,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 18:55:59,385 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:55:59,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:55:59,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1840882363, now seen corresponding path program 38 times [2023-08-30 18:55:59,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:55:59,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003394138] [2023-08-30 18:55:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:55:59,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:55:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:00,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:00,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003394138] [2023-08-30 18:56:00,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003394138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:00,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003174257] [2023-08-30 18:56:00,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:56:00,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:00,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:00,003 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) [2023-08-30 18:56:00,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 18:56:00,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:56:00,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:00,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:56:00,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:00,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:56:00,380 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 [2023-08-30 18:56:00,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:00,473 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 46 treesize of output 30 [2023-08-30 18:56:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:00,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:00,726 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3045 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3045))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (not (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|))))) (or (forall ((v_ArrVal_3045 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3045))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4))) is different from false [2023-08-30 18:56:00,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:00,758 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 116 treesize of output 144 [2023-08-30 18:56:00,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:00,776 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 68 treesize of output 82 [2023-08-30 18:56:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:01,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003174257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:01,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:01,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-08-30 18:56:01,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731776238] [2023-08-30 18:56:01,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:01,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 18:56:01,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 18:56:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=605, Unknown=1, NotChecked=50, Total=756 [2023-08-30 18:56:01,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-30 18:56:01,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 508 transitions, 15483 flow. Second operand has 28 states, 28 states have (on average 160.78571428571428) internal successors, (4502), 28 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:01,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:01,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-30 18:56:01,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:05,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:56:07,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:56:09,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:56:10,964 INFO L130 PetriNetUnfolder]: 2213/3905 cut-off events. [2023-08-30 18:56:10,965 INFO L131 PetriNetUnfolder]: For 197459/197459 co-relation queries the response was YES. [2023-08-30 18:56:10,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54633 conditions, 3905 events. 2213/3905 cut-off events. For 197459/197459 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 25827 event pairs, 377 based on Foata normal form. 8/3913 useless extension candidates. Maximal degree in co-relation 54458. Up to 1957 conditions per place. [2023-08-30 18:56:11,012 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 245 selfloop transitions, 303 changer transitions 4/552 dead transitions. [2023-08-30 18:56:11,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 552 transitions, 17240 flow [2023-08-30 18:56:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:56:11,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:56:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2305 transitions. [2023-08-30 18:56:11,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3366929593923459 [2023-08-30 18:56:11,015 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2305 transitions. [2023-08-30 18:56:11,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2305 transitions. [2023-08-30 18:56:11,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:11,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2305 transitions. [2023-08-30 18:56:11,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.64285714285714) internal successors, (2305), 14 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:11,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:11,022 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:11,022 INFO L175 Difference]: Start difference. First operand has 357 places, 508 transitions, 15483 flow. Second operand 14 states and 2305 transitions. [2023-08-30 18:56:11,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 552 transitions, 17240 flow [2023-08-30 18:56:11,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 552 transitions, 16867 flow, removed 40 selfloop flow, removed 8 redundant places. [2023-08-30 18:56:11,558 INFO L231 Difference]: Finished difference. Result has 361 places, 512 transitions, 16154 flow [2023-08-30 18:56:11,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=15122, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16154, PETRI_PLACES=361, PETRI_TRANSITIONS=512} [2023-08-30 18:56:11,558 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 338 predicate places. [2023-08-30 18:56:11,558 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 512 transitions, 16154 flow [2023-08-30 18:56:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.78571428571428) internal successors, (4502), 28 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:11,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:11,559 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:11,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:11,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:11,760 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:11,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:11,760 INFO L85 PathProgramCache]: Analyzing trace with hash 921864413, now seen corresponding path program 39 times [2023-08-30 18:56:11,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:11,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826533252] [2023-08-30 18:56:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:11,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:12,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:12,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826533252] [2023-08-30 18:56:12,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826533252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:12,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290674815] [2023-08-30 18:56:12,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:56:12,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:12,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:12,293 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) [2023-08-30 18:56:12,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 18:56:12,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 18:56:12,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:12,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 18:56:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:12,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:56:12,781 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 [2023-08-30 18:56:12,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-08-30 18:56:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:12,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:13,081 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_3116 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3116))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_3116 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3116))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)))))))) is different from false [2023-08-30 18:56:13,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:13,110 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 116 treesize of output 144 [2023-08-30 18:56:13,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:13,127 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 68 treesize of output 82 [2023-08-30 18:56:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:13,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290674815] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:13,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:13,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-08-30 18:56:13,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616749825] [2023-08-30 18:56:13,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:13,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 18:56:13,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:13,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 18:56:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=608, Unknown=1, NotChecked=50, Total=756 [2023-08-30 18:56:13,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-30 18:56:13,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 512 transitions, 16154 flow. Second operand has 28 states, 28 states have (on average 160.82142857142858) internal successors, (4503), 28 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:13,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:13,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-30 18:56:13,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:15,071 INFO L130 PetriNetUnfolder]: 2249/3965 cut-off events. [2023-08-30 18:56:15,071 INFO L131 PetriNetUnfolder]: For 213239/213239 co-relation queries the response was YES. [2023-08-30 18:56:15,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56384 conditions, 3965 events. 2249/3965 cut-off events. For 213239/213239 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 26194 event pairs, 403 based on Foata normal form. 8/3973 useless extension candidates. Maximal degree in co-relation 56206. Up to 2081 conditions per place. [2023-08-30 18:56:15,128 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 264 selfloop transitions, 279 changer transitions 3/546 dead transitions. [2023-08-30 18:56:15,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 546 transitions, 17817 flow [2023-08-30 18:56:15,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:56:15,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:56:15,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1806 transitions. [2023-08-30 18:56:15,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33575013943112103 [2023-08-30 18:56:15,130 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1806 transitions. [2023-08-30 18:56:15,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1806 transitions. [2023-08-30 18:56:15,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:15,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1806 transitions. [2023-08-30 18:56:15,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 164.1818181818182) internal successors, (1806), 11 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:15,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:15,133 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:15,134 INFO L175 Difference]: Start difference. First operand has 361 places, 512 transitions, 16154 flow. Second operand 11 states and 1806 transitions. [2023-08-30 18:56:15,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 546 transitions, 17817 flow [2023-08-30 18:56:15,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 546 transitions, 17109 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-08-30 18:56:15,724 INFO L231 Difference]: Finished difference. Result has 363 places, 515 transitions, 16395 flow [2023-08-30 18:56:15,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=15456, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16395, PETRI_PLACES=363, PETRI_TRANSITIONS=515} [2023-08-30 18:56:15,725 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 340 predicate places. [2023-08-30 18:56:15,725 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 515 transitions, 16395 flow [2023-08-30 18:56:15,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.82142857142858) internal successors, (4503), 28 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:15,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:15,726 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:15,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:15,926 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,SelfDestructingSolverStorable47 [2023-08-30 18:56:15,926 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:15,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:15,927 INFO L85 PathProgramCache]: Analyzing trace with hash -758328925, now seen corresponding path program 40 times [2023-08-30 18:56:15,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:15,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710311099] [2023-08-30 18:56:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:15,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:16,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:16,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710311099] [2023-08-30 18:56:16,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710311099] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:16,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493871876] [2023-08-30 18:56:16,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:56:16,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:16,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:16,345 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) [2023-08-30 18:56:16,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 18:56:16,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:56:16,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:16,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 18:56:16,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:16,755 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:56:16,755 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 25 treesize of output 9 [2023-08-30 18:56:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:16,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:17,112 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:56:17,113 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 [2023-08-30 18:56:17,130 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:56:17,131 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 [2023-08-30 18:56:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:17,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493871876] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:17,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:17,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-08-30 18:56:17,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041279054] [2023-08-30 18:56:17,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:17,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:56:17,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:56:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:56:18,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-08-30 18:56:18,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 515 transitions, 16395 flow. Second operand has 22 states, 22 states have (on average 180.0909090909091) internal successors, (3962), 22 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:18,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:18,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-08-30 18:56:18,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:20,112 INFO L130 PetriNetUnfolder]: 2337/4117 cut-off events. [2023-08-30 18:56:20,112 INFO L131 PetriNetUnfolder]: For 239459/239459 co-relation queries the response was YES. [2023-08-30 18:56:20,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58961 conditions, 4117 events. 2337/4117 cut-off events. For 239459/239459 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 27421 event pairs, 478 based on Foata normal form. 20/4137 useless extension candidates. Maximal degree in co-relation 58780. Up to 2900 conditions per place. [2023-08-30 18:56:20,166 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 262 selfloop transitions, 303 changer transitions 2/567 dead transitions. [2023-08-30 18:56:20,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 567 transitions, 18645 flow [2023-08-30 18:56:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:56:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:56:20,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2747 transitions. [2023-08-30 18:56:20,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37450579413769597 [2023-08-30 18:56:20,168 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2747 transitions. [2023-08-30 18:56:20,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2747 transitions. [2023-08-30 18:56:20,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:20,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2747 transitions. [2023-08-30 18:56:20,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 183.13333333333333) internal successors, (2747), 15 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:20,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:20,173 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:20,173 INFO L175 Difference]: Start difference. First operand has 363 places, 515 transitions, 16395 flow. Second operand 15 states and 2747 transitions. [2023-08-30 18:56:20,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 567 transitions, 18645 flow [2023-08-30 18:56:20,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 567 transitions, 17914 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-30 18:56:20,740 INFO L231 Difference]: Finished difference. Result has 371 places, 533 transitions, 17324 flow [2023-08-30 18:56:20,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=15690, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=17324, PETRI_PLACES=371, PETRI_TRANSITIONS=533} [2023-08-30 18:56:20,740 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 348 predicate places. [2023-08-30 18:56:20,741 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 533 transitions, 17324 flow [2023-08-30 18:56:20,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 180.0909090909091) internal successors, (3962), 22 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:20,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:20,741 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:20,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:20,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 18:56:20,942 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:20,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1165633259, now seen corresponding path program 41 times [2023-08-30 18:56:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:20,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235422871] [2023-08-30 18:56:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:20,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:21,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:21,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235422871] [2023-08-30 18:56:21,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235422871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:21,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444140411] [2023-08-30 18:56:21,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:56:21,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:21,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:21,431 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) [2023-08-30 18:56:21,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 18:56:21,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:56:21,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:21,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 18:56:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:21,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:56:21,810 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 [2023-08-30 18:56:21,920 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-08-30 18:56:21,920 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 26 treesize of output 19 [2023-08-30 18:56:21,927 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-30 18:56:21,927 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 25 treesize of output 9 [2023-08-30 18:56:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:21,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:22,196 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~o_2~0.offset Int) (v_ArrVal_3257 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3257))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 ~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) ~o_2~0.offset))))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) is different from false [2023-08-30 18:56:22,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:22,230 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 116 treesize of output 144 [2023-08-30 18:56:22,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:22,247 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 68 treesize of output 82 [2023-08-30 18:56:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444140411] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:22,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:22,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2023-08-30 18:56:22,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538579345] [2023-08-30 18:56:22,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:22,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 18:56:22,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:22,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 18:56:22,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=660, Unknown=1, NotChecked=52, Total=812 [2023-08-30 18:56:22,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-30 18:56:22,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 533 transitions, 17324 flow. Second operand has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:22,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:22,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-30 18:56:22,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:25,098 INFO L130 PetriNetUnfolder]: 2377/4189 cut-off events. [2023-08-30 18:56:25,098 INFO L131 PetriNetUnfolder]: For 238512/238512 co-relation queries the response was YES. [2023-08-30 18:56:25,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61413 conditions, 4189 events. 2377/4189 cut-off events. For 238512/238512 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 28022 event pairs, 383 based on Foata normal form. 8/4197 useless extension candidates. Maximal degree in co-relation 61228. Up to 2019 conditions per place. [2023-08-30 18:56:25,151 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 277 selfloop transitions, 309 changer transitions 5/591 dead transitions. [2023-08-30 18:56:25,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 591 transitions, 19593 flow [2023-08-30 18:56:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 18:56:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 18:56:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2790 transitions. [2023-08-30 18:56:25,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3356189101407434 [2023-08-30 18:56:25,153 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2790 transitions. [2023-08-30 18:56:25,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2790 transitions. [2023-08-30 18:56:25,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:25,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2790 transitions. [2023-08-30 18:56:25,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 164.11764705882354) internal successors, (2790), 17 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:25,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:25,159 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:25,159 INFO L175 Difference]: Start difference. First operand has 371 places, 533 transitions, 17324 flow. Second operand 17 states and 2790 transitions. [2023-08-30 18:56:25,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 591 transitions, 19593 flow [2023-08-30 18:56:25,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 591 transitions, 19319 flow, removed 88 selfloop flow, removed 6 redundant places. [2023-08-30 18:56:25,796 INFO L231 Difference]: Finished difference. Result has 384 places, 541 transitions, 18083 flow [2023-08-30 18:56:25,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=17072, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18083, PETRI_PLACES=384, PETRI_TRANSITIONS=541} [2023-08-30 18:56:25,797 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 361 predicate places. [2023-08-30 18:56:25,797 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 541 transitions, 18083 flow [2023-08-30 18:56:25,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:25,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:25,798 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:25,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:25,998 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,SelfDestructingSolverStorable49 [2023-08-30 18:56:25,998 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:25,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:25,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1142305331, now seen corresponding path program 42 times [2023-08-30 18:56:25,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:25,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470779403] [2023-08-30 18:56:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:25,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:26,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:26,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470779403] [2023-08-30 18:56:26,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470779403] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:26,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067548310] [2023-08-30 18:56:26,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:56:26,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:26,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:26,507 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) [2023-08-30 18:56:26,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 18:56:26,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:56:26,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:26,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 18:56:26,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:26,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:56:26,883 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 [2023-08-30 18:56:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:27,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:27,206 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_3328 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3328))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_3328 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3328))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)))))))) is different from false [2023-08-30 18:56:27,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:27,236 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 116 treesize of output 144 [2023-08-30 18:56:27,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:27,253 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 68 treesize of output 82 [2023-08-30 18:56:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:27,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067548310] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:27,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:27,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-08-30 18:56:27,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492476593] [2023-08-30 18:56:27,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:27,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 18:56:27,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:27,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 18:56:27,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=607, Unknown=1, NotChecked=50, Total=756 [2023-08-30 18:56:27,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-30 18:56:27,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 541 transitions, 18083 flow. Second operand has 28 states, 28 states have (on average 160.89285714285714) internal successors, (4505), 28 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:27,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:27,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-30 18:56:27,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:30,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:56:31,939 INFO L130 PetriNetUnfolder]: 2357/4149 cut-off events. [2023-08-30 18:56:31,939 INFO L131 PetriNetUnfolder]: For 257771/257771 co-relation queries the response was YES. [2023-08-30 18:56:31,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62570 conditions, 4149 events. 2357/4149 cut-off events. For 257771/257771 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 27750 event pairs, 529 based on Foata normal form. 8/4157 useless extension candidates. Maximal degree in co-relation 62380. Up to 2849 conditions per place. [2023-08-30 18:56:31,999 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 239 selfloop transitions, 319 changer transitions 13/571 dead transitions. [2023-08-30 18:56:31,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 571 transitions, 19459 flow [2023-08-30 18:56:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:56:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:56:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2137 transitions. [2023-08-30 18:56:32,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3361648576372503 [2023-08-30 18:56:32,001 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2137 transitions. [2023-08-30 18:56:32,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2137 transitions. [2023-08-30 18:56:32,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:32,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2137 transitions. [2023-08-30 18:56:32,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 164.3846153846154) internal successors, (2137), 13 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:32,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:32,005 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:32,006 INFO L175 Difference]: Start difference. First operand has 384 places, 541 transitions, 18083 flow. Second operand 13 states and 2137 transitions. [2023-08-30 18:56:32,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 571 transitions, 19459 flow [2023-08-30 18:56:32,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 571 transitions, 19210 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-08-30 18:56:32,761 INFO L231 Difference]: Finished difference. Result has 388 places, 540 transitions, 18453 flow [2023-08-30 18:56:32,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=17834, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18453, PETRI_PLACES=388, PETRI_TRANSITIONS=540} [2023-08-30 18:56:32,762 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 365 predicate places. [2023-08-30 18:56:32,762 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 540 transitions, 18453 flow [2023-08-30 18:56:32,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.89285714285714) internal successors, (4505), 28 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:32,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:32,763 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:32,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:32,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:32,963 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:32,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:32,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1947435843, now seen corresponding path program 43 times [2023-08-30 18:56:32,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:32,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421732576] [2023-08-30 18:56:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:32,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:33,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:33,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421732576] [2023-08-30 18:56:33,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421732576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:33,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949686739] [2023-08-30 18:56:33,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:56:33,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:33,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:33,438 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) [2023-08-30 18:56:33,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 18:56:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 18:56:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:56:33,809 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 [2023-08-30 18:56:33,893 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:56:33,894 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 26 treesize of output 14 [2023-08-30 18:56:33,901 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:56:33,902 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 25 treesize of output 9 [2023-08-30 18:56:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:33,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:34,176 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3399 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3399))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))))))) (or (forall ((v_ArrVal_3399 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3399))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4))) is different from false [2023-08-30 18:56:34,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:34,207 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 116 treesize of output 144 [2023-08-30 18:56:34,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:56:34,224 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 68 treesize of output 82 [2023-08-30 18:56:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:34,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949686739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:34,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:34,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-30 18:56:34,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487323660] [2023-08-30 18:56:34,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:34,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 18:56:34,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:34,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 18:56:34,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=653, Unknown=1, NotChecked=52, Total=812 [2023-08-30 18:56:34,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-30 18:56:34,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 540 transitions, 18453 flow. Second operand has 29 states, 29 states have (on average 160.89655172413794) internal successors, (4666), 29 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:34,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:34,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-30 18:56:34,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:36,438 INFO L130 PetriNetUnfolder]: 2319/4055 cut-off events. [2023-08-30 18:56:36,438 INFO L131 PetriNetUnfolder]: For 257730/257730 co-relation queries the response was YES. [2023-08-30 18:56:36,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62945 conditions, 4055 events. 2319/4055 cut-off events. For 257730/257730 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 26751 event pairs, 382 based on Foata normal form. 8/4063 useless extension candidates. Maximal degree in co-relation 62752. Up to 2127 conditions per place. [2023-08-30 18:56:36,497 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 283 selfloop transitions, 283 changer transitions 9/575 dead transitions. [2023-08-30 18:56:36,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 575 transitions, 20075 flow [2023-08-30 18:56:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:56:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:56:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2298 transitions. [2023-08-30 18:56:36,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33567046450482035 [2023-08-30 18:56:36,499 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2298 transitions. [2023-08-30 18:56:36,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2298 transitions. [2023-08-30 18:56:36,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:36,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2298 transitions. [2023-08-30 18:56:36,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.14285714285714) internal successors, (2298), 14 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:36,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:36,504 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:36,505 INFO L175 Difference]: Start difference. First operand has 388 places, 540 transitions, 18453 flow. Second operand 14 states and 2298 transitions. [2023-08-30 18:56:36,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 575 transitions, 20075 flow [2023-08-30 18:56:37,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 575 transitions, 19548 flow, removed 5 selfloop flow, removed 13 redundant places. [2023-08-30 18:56:37,321 INFO L231 Difference]: Finished difference. Result has 385 places, 537 transitions, 18430 flow [2023-08-30 18:56:37,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=17880, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18430, PETRI_PLACES=385, PETRI_TRANSITIONS=537} [2023-08-30 18:56:37,322 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 362 predicate places. [2023-08-30 18:56:37,323 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 537 transitions, 18430 flow [2023-08-30 18:56:37,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 160.89655172413794) internal successors, (4666), 29 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:37,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:37,324 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:37,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:37,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:37,533 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:37,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash 269100067, now seen corresponding path program 44 times [2023-08-30 18:56:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:37,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837094491] [2023-08-30 18:56:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:37,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:37,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:37,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837094491] [2023-08-30 18:56:37,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837094491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:37,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392797576] [2023-08-30 18:56:37,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:56:37,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:37,966 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) [2023-08-30 18:56:37,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 18:56:38,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:56:38,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:38,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:56:38,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:38,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:38,473 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:56:38,473 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 99 [2023-08-30 18:56:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:38,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392797576] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:38,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:38,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-30 18:56:38,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159577657] [2023-08-30 18:56:38,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:38,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:56:38,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:38,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:56:38,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:56:39,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-30 18:56:39,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 537 transitions, 18430 flow. Second operand has 18 states, 18 states have (on average 183.16666666666666) internal successors, (3297), 18 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:39,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:39,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-30 18:56:39,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:40,839 INFO L130 PetriNetUnfolder]: 2397/4177 cut-off events. [2023-08-30 18:56:40,839 INFO L131 PetriNetUnfolder]: For 272783/272783 co-relation queries the response was YES. [2023-08-30 18:56:40,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65357 conditions, 4177 events. 2397/4177 cut-off events. For 272783/272783 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 27638 event pairs, 378 based on Foata normal form. 8/4185 useless extension candidates. Maximal degree in co-relation 65168. Up to 2049 conditions per place. [2023-08-30 18:56:40,893 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 252 selfloop transitions, 342 changer transitions 3/597 dead transitions. [2023-08-30 18:56:40,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 597 transitions, 20869 flow [2023-08-30 18:56:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:56:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:56:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2602 transitions. [2023-08-30 18:56:40,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3800759567630733 [2023-08-30 18:56:40,895 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2602 transitions. [2023-08-30 18:56:40,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2602 transitions. [2023-08-30 18:56:40,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:40,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2602 transitions. [2023-08-30 18:56:40,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.85714285714286) internal successors, (2602), 14 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:40,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:40,900 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:40,900 INFO L175 Difference]: Start difference. First operand has 385 places, 537 transitions, 18430 flow. Second operand 14 states and 2602 transitions. [2023-08-30 18:56:40,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 597 transitions, 20869 flow [2023-08-30 18:56:41,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 597 transitions, 20295 flow, removed 7 selfloop flow, removed 14 redundant places. [2023-08-30 18:56:41,525 INFO L231 Difference]: Finished difference. Result has 384 places, 550 transitions, 19437 flow [2023-08-30 18:56:41,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=17883, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19437, PETRI_PLACES=384, PETRI_TRANSITIONS=550} [2023-08-30 18:56:41,526 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 361 predicate places. [2023-08-30 18:56:41,526 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 550 transitions, 19437 flow [2023-08-30 18:56:41,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.16666666666666) internal successors, (3297), 18 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:41,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:41,526 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:41,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:41,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:41,727 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:41,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:41,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1418744525, now seen corresponding path program 45 times [2023-08-30 18:56:41,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:41,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317120287] [2023-08-30 18:56:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:41,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:42,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:42,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317120287] [2023-08-30 18:56:42,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317120287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:42,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994438833] [2023-08-30 18:56:42,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:56:42,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:42,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:42,143 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) [2023-08-30 18:56:42,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 18:56:42,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:56:42,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:42,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:56:42,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:42,498 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:56:42,498 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 26 treesize of output 14 [2023-08-30 18:56:42,505 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:56:42,505 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 25 treesize of output 9 [2023-08-30 18:56:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:42,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:42,712 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:56:42,712 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 [2023-08-30 18:56:42,735 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:56:42,736 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 [2023-08-30 18:56:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:42,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994438833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:42,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:42,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 18:56:42,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220740911] [2023-08-30 18:56:42,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:42,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:56:42,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:42,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:56:42,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:56:43,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:56:43,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 550 transitions, 19437 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:43,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:43,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:56:43,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:45,385 INFO L130 PetriNetUnfolder]: 2437/4261 cut-off events. [2023-08-30 18:56:45,385 INFO L131 PetriNetUnfolder]: For 294146/294146 co-relation queries the response was YES. [2023-08-30 18:56:45,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67489 conditions, 4261 events. 2437/4261 cut-off events. For 294146/294146 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 28340 event pairs, 404 based on Foata normal form. 16/4277 useless extension candidates. Maximal degree in co-relation 67302. Up to 2237 conditions per place. [2023-08-30 18:56:45,443 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 280 selfloop transitions, 312 changer transitions 9/601 dead transitions. [2023-08-30 18:56:45,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 601 transitions, 21561 flow [2023-08-30 18:56:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:56:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:56:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2597 transitions. [2023-08-30 18:56:45,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37934560327198363 [2023-08-30 18:56:45,446 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2597 transitions. [2023-08-30 18:56:45,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2597 transitions. [2023-08-30 18:56:45,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:45,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2597 transitions. [2023-08-30 18:56:45,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.5) internal successors, (2597), 14 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:45,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:45,450 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:45,450 INFO L175 Difference]: Start difference. First operand has 384 places, 550 transitions, 19437 flow. Second operand 14 states and 2597 transitions. [2023-08-30 18:56:45,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 601 transitions, 21561 flow [2023-08-30 18:56:46,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 601 transitions, 21349 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-30 18:56:46,138 INFO L231 Difference]: Finished difference. Result has 394 places, 555 transitions, 20441 flow [2023-08-30 18:56:46,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=19225, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=20441, PETRI_PLACES=394, PETRI_TRANSITIONS=555} [2023-08-30 18:56:46,139 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 371 predicate places. [2023-08-30 18:56:46,139 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 555 transitions, 20441 flow [2023-08-30 18:56:46,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:46,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:46,140 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:46,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:46,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-30 18:56:46,341 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:46,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:46,341 INFO L85 PathProgramCache]: Analyzing trace with hash -580794353, now seen corresponding path program 46 times [2023-08-30 18:56:46,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:46,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066731535] [2023-08-30 18:56:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:46,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:46,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:46,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066731535] [2023-08-30 18:56:46,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066731535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:46,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893314289] [2023-08-30 18:56:46,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:56:46,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:46,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:46,753 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) [2023-08-30 18:56:46,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 18:56:47,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:56:47,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:47,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:56:47,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:47,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-08-30 18:56:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:47,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:47,299 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:56:47,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 70 [2023-08-30 18:56:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:47,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893314289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:47,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:47,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 18:56:47,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212298315] [2023-08-30 18:56:47,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:47,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:56:47,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:56:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:56:47,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 18:56:47,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 555 transitions, 20441 flow. Second operand has 20 states, 20 states have (on average 181.1) internal successors, (3622), 20 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:47,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:47,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 18:56:47,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:49,821 INFO L130 PetriNetUnfolder]: 2549/4431 cut-off events. [2023-08-30 18:56:49,821 INFO L131 PetriNetUnfolder]: For 336987/336987 co-relation queries the response was YES. [2023-08-30 18:56:49,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72762 conditions, 4431 events. 2549/4431 cut-off events. For 336987/336987 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 29537 event pairs, 70 based on Foata normal form. 8/4439 useless extension candidates. Maximal degree in co-relation 72570. Up to 1598 conditions per place. [2023-08-30 18:56:49,886 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 178 selfloop transitions, 463 changer transitions 4/645 dead transitions. [2023-08-30 18:56:49,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 645 transitions, 23557 flow [2023-08-30 18:56:49,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 18:56:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 18:56:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3315 transitions. [2023-08-30 18:56:49,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37661895023858216 [2023-08-30 18:56:49,888 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3315 transitions. [2023-08-30 18:56:49,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3315 transitions. [2023-08-30 18:56:49,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:49,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3315 transitions. [2023-08-30 18:56:49,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 184.16666666666666) internal successors, (3315), 18 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:49,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:49,894 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:49,894 INFO L175 Difference]: Start difference. First operand has 394 places, 555 transitions, 20441 flow. Second operand 18 states and 3315 transitions. [2023-08-30 18:56:49,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 645 transitions, 23557 flow [2023-08-30 18:56:50,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 645 transitions, 23336 flow, removed 43 selfloop flow, removed 9 redundant places. [2023-08-30 18:56:50,837 INFO L231 Difference]: Finished difference. Result has 405 places, 574 transitions, 22293 flow [2023-08-30 18:56:50,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=20233, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22293, PETRI_PLACES=405, PETRI_TRANSITIONS=574} [2023-08-30 18:56:50,838 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 382 predicate places. [2023-08-30 18:56:50,838 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 574 transitions, 22293 flow [2023-08-30 18:56:50,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.1) internal successors, (3622), 20 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:50,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:50,838 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:50,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-08-30 18:56:51,039 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,SelfDestructingSolverStorable54 [2023-08-30 18:56:51,039 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:51,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:51,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1641094237, now seen corresponding path program 47 times [2023-08-30 18:56:51,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:51,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348879045] [2023-08-30 18:56:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:51,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:51,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:51,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348879045] [2023-08-30 18:56:51,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348879045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:51,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145518838] [2023-08-30 18:56:51,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:56:51,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:51,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:51,516 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) [2023-08-30 18:56:51,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 18:56:51,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:56:51,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:51,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:56:51,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:51,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:52,137 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:56:52,137 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 70 [2023-08-30 18:56:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:52,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145518838] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:52,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:52,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 18:56:52,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910410656] [2023-08-30 18:56:52,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:52,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:56:52,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:52,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:56:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:56:52,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-30 18:56:52,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 574 transitions, 22293 flow. Second operand has 20 states, 20 states have (on average 183.1) internal successors, (3662), 20 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:52,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:52,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-30 18:56:52,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:56:54,880 INFO L130 PetriNetUnfolder]: 2693/4671 cut-off events. [2023-08-30 18:56:54,880 INFO L131 PetriNetUnfolder]: For 384005/384005 co-relation queries the response was YES. [2023-08-30 18:56:54,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79720 conditions, 4671 events. 2693/4671 cut-off events. For 384005/384005 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 31364 event pairs, 66 based on Foata normal form. 8/4679 useless extension candidates. Maximal degree in co-relation 79522. Up to 1758 conditions per place. [2023-08-30 18:56:54,949 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 172 selfloop transitions, 474 changer transitions 4/650 dead transitions. [2023-08-30 18:56:54,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 650 transitions, 25196 flow [2023-08-30 18:56:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 18:56:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 18:56:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2981 transitions. [2023-08-30 18:56:54,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38100715746421265 [2023-08-30 18:56:54,951 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2981 transitions. [2023-08-30 18:56:54,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2981 transitions. [2023-08-30 18:56:54,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:56:54,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2981 transitions. [2023-08-30 18:56:54,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 186.3125) internal successors, (2981), 16 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:54,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:54,957 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:54,957 INFO L175 Difference]: Start difference. First operand has 405 places, 574 transitions, 22293 flow. Second operand 16 states and 2981 transitions. [2023-08-30 18:56:54,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 650 transitions, 25196 flow [2023-08-30 18:56:55,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 650 transitions, 24368 flow, removed 21 selfloop flow, removed 12 redundant places. [2023-08-30 18:56:55,897 INFO L231 Difference]: Finished difference. Result has 411 places, 588 transitions, 23464 flow [2023-08-30 18:56:55,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=21467, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=23464, PETRI_PLACES=411, PETRI_TRANSITIONS=588} [2023-08-30 18:56:55,898 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 388 predicate places. [2023-08-30 18:56:55,898 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 588 transitions, 23464 flow [2023-08-30 18:56:55,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 183.1) internal successors, (3662), 20 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:55,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:56:55,899 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:56:55,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 18:56:56,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-30 18:56:56,100 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:56:56,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:56:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1803978639, now seen corresponding path program 48 times [2023-08-30 18:56:56,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:56:56,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332486100] [2023-08-30 18:56:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:56:56,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:56:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:56:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:56,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:56:56,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332486100] [2023-08-30 18:56:56,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332486100] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:56:56,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279139959] [2023-08-30 18:56:56,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:56:56,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:56:56,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:56:56,522 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) [2023-08-30 18:56:56,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 18:56:56,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:56:56,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:56:56,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 18:56:56,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:56:57,012 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:56:57,013 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 25 treesize of output 9 [2023-08-30 18:56:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:57,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:56:57,419 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:56:57,419 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 99 [2023-08-30 18:56:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:56:57,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279139959] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:56:57,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:56:57,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2023-08-30 18:56:57,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766651864] [2023-08-30 18:56:57,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:56:57,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:56:57,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:56:57,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:56:57,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:56:58,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-30 18:56:58,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 588 transitions, 23464 flow. Second operand has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:56:58,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:56:58,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-30 18:56:58,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:57:01,142 INFO L130 PetriNetUnfolder]: 2811/4889 cut-off events. [2023-08-30 18:57:01,142 INFO L131 PetriNetUnfolder]: For 434382/434382 co-relation queries the response was YES. [2023-08-30 18:57:01,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85511 conditions, 4889 events. 2811/4889 cut-off events. For 434382/434382 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33171 event pairs, 424 based on Foata normal form. 20/4909 useless extension candidates. Maximal degree in co-relation 85308. Up to 3270 conditions per place. [2023-08-30 18:57:01,230 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 294 selfloop transitions, 363 changer transitions 1/658 dead transitions. [2023-08-30 18:57:01,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 658 transitions, 26396 flow [2023-08-30 18:57:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 18:57:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 18:57:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3818 transitions. [2023-08-30 18:57:01,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717986171973902 [2023-08-30 18:57:01,233 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3818 transitions. [2023-08-30 18:57:01,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3818 transitions. [2023-08-30 18:57:01,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:57:01,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3818 transitions. [2023-08-30 18:57:01,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 181.8095238095238) internal successors, (3818), 21 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:01,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:01,240 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:01,240 INFO L175 Difference]: Start difference. First operand has 411 places, 588 transitions, 23464 flow. Second operand 21 states and 3818 transitions. [2023-08-30 18:57:01,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 658 transitions, 26396 flow [2023-08-30 18:57:02,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 658 transitions, 25975 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-08-30 18:57:02,531 INFO L231 Difference]: Finished difference. Result has 427 places, 608 transitions, 25170 flow [2023-08-30 18:57:02,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=23043, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=25170, PETRI_PLACES=427, PETRI_TRANSITIONS=608} [2023-08-30 18:57:02,532 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 404 predicate places. [2023-08-30 18:57:02,532 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 608 transitions, 25170 flow [2023-08-30 18:57:02,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:02,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:02,533 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:57:02,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-30 18:57:02,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-30 18:57:02,737 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:57:02,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:02,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1752426749, now seen corresponding path program 49 times [2023-08-30 18:57:02,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:02,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698876563] [2023-08-30 18:57:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:03,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:03,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698876563] [2023-08-30 18:57:03,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698876563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:03,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779119172] [2023-08-30 18:57:03,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:57:03,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:03,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:03,211 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:57:03,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 18:57:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:03,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:57:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:03,634 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:57:03,635 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 26 treesize of output 14 [2023-08-30 18:57:03,644 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:57:03,644 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 25 treesize of output 9 [2023-08-30 18:57:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:03,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:03,876 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:57:03,876 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 70 [2023-08-30 18:57:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:03,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779119172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:03,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:03,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-30 18:57:03,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559393876] [2023-08-30 18:57:03,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:03,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 18:57:03,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:03,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 18:57:03,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-08-30 18:57:04,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:57:04,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 608 transitions, 25170 flow. Second operand has 21 states, 21 states have (on average 182.0) internal successors, (3822), 21 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:04,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:04,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:57:04,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:57:07,485 INFO L130 PetriNetUnfolder]: 3027/5261 cut-off events. [2023-08-30 18:57:07,485 INFO L131 PetriNetUnfolder]: For 474226/474226 co-relation queries the response was YES. [2023-08-30 18:57:07,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96270 conditions, 5261 events. 3027/5261 cut-off events. For 474226/474226 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 36131 event pairs, 78 based on Foata normal form. 8/5269 useless extension candidates. Maximal degree in co-relation 96062. Up to 2098 conditions per place. [2023-08-30 18:57:07,574 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 205 selfloop transitions, 501 changer transitions 6/712 dead transitions. [2023-08-30 18:57:07,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 712 transitions, 29175 flow [2023-08-30 18:57:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 18:57:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 18:57:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3891 transitions. [2023-08-30 18:57:07,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37890739117732986 [2023-08-30 18:57:07,577 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3891 transitions. [2023-08-30 18:57:07,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3891 transitions. [2023-08-30 18:57:07,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:57:07,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3891 transitions. [2023-08-30 18:57:07,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 185.28571428571428) internal successors, (3891), 21 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:07,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:07,584 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:07,584 INFO L175 Difference]: Start difference. First operand has 427 places, 608 transitions, 25170 flow. Second operand 21 states and 3891 transitions. [2023-08-30 18:57:07,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 712 transitions, 29175 flow [2023-08-30 18:57:09,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 712 transitions, 28598 flow, removed 116 selfloop flow, removed 15 redundant places. [2023-08-30 18:57:09,119 INFO L231 Difference]: Finished difference. Result has 436 places, 630 transitions, 27342 flow [2023-08-30 18:57:09,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=24626, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=27342, PETRI_PLACES=436, PETRI_TRANSITIONS=630} [2023-08-30 18:57:09,120 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 413 predicate places. [2023-08-30 18:57:09,120 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 630 transitions, 27342 flow [2023-08-30 18:57:09,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.0) internal successors, (3822), 21 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:09,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:09,121 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:57:09,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 18:57:09,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-30 18:57:09,321 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:57:09,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:09,322 INFO L85 PathProgramCache]: Analyzing trace with hash -682645809, now seen corresponding path program 50 times [2023-08-30 18:57:09,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:09,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010595967] [2023-08-30 18:57:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:09,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:09,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010595967] [2023-08-30 18:57:09,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010595967] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710967115] [2023-08-30 18:57:09,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:57:09,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:09,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:09,839 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:57:09,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 18:57:10,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:57:10,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:57:10,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:57:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:10,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:57:10,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-30 18:57:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:10,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:10,522 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:57:10,522 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 70 [2023-08-30 18:57:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:10,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710967115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:10,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:10,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-30 18:57:10,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29518390] [2023-08-30 18:57:10,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:10,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:57:10,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:10,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:57:10,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:57:11,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 18:57:11,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 630 transitions, 27342 flow. Second operand has 22 states, 22 states have (on average 181.13636363636363) internal successors, (3985), 22 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:11,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:11,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 18:57:11,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:57:13,969 INFO L130 PetriNetUnfolder]: 3007/5221 cut-off events. [2023-08-30 18:57:13,970 INFO L131 PetriNetUnfolder]: For 500165/500165 co-relation queries the response was YES. [2023-08-30 18:57:14,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98419 conditions, 5221 events. 3007/5221 cut-off events. For 500165/500165 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 35719 event pairs, 78 based on Foata normal form. 8/5229 useless extension candidates. Maximal degree in co-relation 98208. Up to 2046 conditions per place. [2023-08-30 18:57:14,051 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 233 selfloop transitions, 453 changer transitions 10/696 dead transitions. [2023-08-30 18:57:14,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 696 transitions, 29572 flow [2023-08-30 18:57:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 18:57:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 18:57:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3139 transitions. [2023-08-30 18:57:14,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776013472873812 [2023-08-30 18:57:14,054 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3139 transitions. [2023-08-30 18:57:14,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3139 transitions. [2023-08-30 18:57:14,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:57:14,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3139 transitions. [2023-08-30 18:57:14,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 184.64705882352942) internal successors, (3139), 17 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:14,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:14,060 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:14,060 INFO L175 Difference]: Start difference. First operand has 436 places, 630 transitions, 27342 flow. Second operand 17 states and 3139 transitions. [2023-08-30 18:57:14,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 696 transitions, 29572 flow [2023-08-30 18:57:15,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 696 transitions, 28565 flow, removed 51 selfloop flow, removed 15 redundant places. [2023-08-30 18:57:15,502 INFO L231 Difference]: Finished difference. Result has 436 places, 627 transitions, 27171 flow [2023-08-30 18:57:15,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=26286, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=27171, PETRI_PLACES=436, PETRI_TRANSITIONS=627} [2023-08-30 18:57:15,503 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 413 predicate places. [2023-08-30 18:57:15,503 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 627 transitions, 27171 flow [2023-08-30 18:57:15,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 181.13636363636363) internal successors, (3985), 22 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:15,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:15,504 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:57:15,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-30 18:57:15,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-30 18:57:15,710 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:57:15,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1784159135, now seen corresponding path program 51 times [2023-08-30 18:57:15,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:15,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122301816] [2023-08-30 18:57:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:15,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:16,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:16,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122301816] [2023-08-30 18:57:16,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122301816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:16,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590230311] [2023-08-30 18:57:16,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:57:16,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:16,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:16,172 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:57:16,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 18:57:16,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:57:16,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:57:16,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:57:16,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:16,573 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:57:16,573 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 60 treesize of output 32 [2023-08-30 18:57:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:16,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:16,719 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:57:16,719 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 [2023-08-30 18:57:16,735 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:57:16,736 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 [2023-08-30 18:57:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:16,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590230311] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:16,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:16,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-30 18:57:16,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184574431] [2023-08-30 18:57:16,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:16,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 18:57:16,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 18:57:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-08-30 18:57:17,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:57:17,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 627 transitions, 27171 flow. Second operand has 19 states, 19 states have (on average 182.26315789473685) internal successors, (3463), 19 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:17,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:17,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:57:17,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:57:19,383 INFO L130 PetriNetUnfolder]: 2987/5183 cut-off events. [2023-08-30 18:57:19,384 INFO L131 PetriNetUnfolder]: For 519476/519476 co-relation queries the response was YES. [2023-08-30 18:57:19,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97884 conditions, 5183 events. 2987/5183 cut-off events. For 519476/519476 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 35471 event pairs, 688 based on Foata normal form. 8/5191 useless extension candidates. Maximal degree in co-relation 97672. Up to 3703 conditions per place. [2023-08-30 18:57:19,469 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 290 selfloop transitions, 352 changer transitions 11/653 dead transitions. [2023-08-30 18:57:19,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 653 transitions, 28600 flow [2023-08-30 18:57:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:57:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:57:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2039 transitions. [2023-08-30 18:57:19,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790667410299312 [2023-08-30 18:57:19,471 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2039 transitions. [2023-08-30 18:57:19,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2039 transitions. [2023-08-30 18:57:19,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:57:19,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2039 transitions. [2023-08-30 18:57:19,473 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) [2023-08-30 18:57:19,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:19,475 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:19,475 INFO L175 Difference]: Start difference. First operand has 436 places, 627 transitions, 27171 flow. Second operand 11 states and 2039 transitions. [2023-08-30 18:57:19,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 653 transitions, 28600 flow [2023-08-30 18:57:21,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 653 transitions, 27799 flow, removed 5 selfloop flow, removed 16 redundant places. [2023-08-30 18:57:21,384 INFO L231 Difference]: Finished difference. Result has 427 places, 623 transitions, 26984 flow [2023-08-30 18:57:21,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=26310, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=26984, PETRI_PLACES=427, PETRI_TRANSITIONS=623} [2023-08-30 18:57:21,385 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 404 predicate places. [2023-08-30 18:57:21,385 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 623 transitions, 26984 flow [2023-08-30 18:57:21,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.26315789473685) internal successors, (3463), 19 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:21,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:21,386 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:57:21,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-30 18:57:21,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:21,587 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:57:21,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:21,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1431569059, now seen corresponding path program 52 times [2023-08-30 18:57:21,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:21,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395013875] [2023-08-30 18:57:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:21,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:22,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:22,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395013875] [2023-08-30 18:57:22,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395013875] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:22,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368894318] [2023-08-30 18:57:22,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:57:22,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:22,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:22,069 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:57:22,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-30 18:57:22,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:57:22,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:57:22,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:57:22,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:22,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:57:22,430 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 59 treesize of output 35 [2023-08-30 18:57:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:22,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:22,648 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:57:22,649 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 [2023-08-30 18:57:22,666 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:57:22,667 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 [2023-08-30 18:57:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:22,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368894318] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:22,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:22,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-30 18:57:22,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585054613] [2023-08-30 18:57:22,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:22,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:57:22,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:57:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:57:23,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:57:23,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 623 transitions, 26984 flow. Second operand has 18 states, 18 states have (on average 182.16666666666666) internal successors, (3279), 18 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:23,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:23,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:57:23,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:57:25,368 INFO L130 PetriNetUnfolder]: 3021/5235 cut-off events. [2023-08-30 18:57:25,368 INFO L131 PetriNetUnfolder]: For 536396/536396 co-relation queries the response was YES. [2023-08-30 18:57:25,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99373 conditions, 5235 events. 3021/5235 cut-off events. For 536396/536396 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 35779 event pairs, 442 based on Foata normal form. 8/5243 useless extension candidates. Maximal degree in co-relation 99164. Up to 2495 conditions per place. [2023-08-30 18:57:25,458 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 257 selfloop transitions, 411 changer transitions 4/672 dead transitions. [2023-08-30 18:57:25,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 672 transitions, 29199 flow [2023-08-30 18:57:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:57:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:57:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2410 transitions. [2023-08-30 18:57:25,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791096429133239 [2023-08-30 18:57:25,461 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2410 transitions. [2023-08-30 18:57:25,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2410 transitions. [2023-08-30 18:57:25,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:57:25,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2410 transitions. [2023-08-30 18:57:25,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.3846153846154) internal successors, (2410), 13 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:25,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:25,466 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:25,466 INFO L175 Difference]: Start difference. First operand has 427 places, 623 transitions, 26984 flow. Second operand 13 states and 2410 transitions. [2023-08-30 18:57:25,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 672 transitions, 29199 flow [2023-08-30 18:57:27,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 672 transitions, 28801 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-30 18:57:27,214 INFO L231 Difference]: Finished difference. Result has 430 places, 627 transitions, 28041 flow [2023-08-30 18:57:27,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=26593, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=28041, PETRI_PLACES=430, PETRI_TRANSITIONS=627} [2023-08-30 18:57:27,215 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 407 predicate places. [2023-08-30 18:57:27,215 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 627 transitions, 28041 flow [2023-08-30 18:57:27,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 182.16666666666666) internal successors, (3279), 18 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:27,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:27,216 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:57:27,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-30 18:57:27,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:27,416 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:57:27,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash -902532329, now seen corresponding path program 53 times [2023-08-30 18:57:27,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:27,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109944650] [2023-08-30 18:57:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:27,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:27,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:27,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109944650] [2023-08-30 18:57:27,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109944650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:27,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057400796] [2023-08-30 18:57:27,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:57:27,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:27,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:27,941 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:57:27,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-30 18:57:28,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:57:28,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:57:28,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 18:57:28,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:28,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:57:28,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 63 [2023-08-30 18:57:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:28,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:28,621 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:57:28,622 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 99 [2023-08-30 18:57:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:28,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057400796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:28,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:28,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2023-08-30 18:57:28,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897625724] [2023-08-30 18:57:28,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:28,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:57:28,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:28,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:57:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:57:29,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 18:57:29,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 627 transitions, 28041 flow. Second operand has 22 states, 22 states have (on average 180.95454545454547) internal successors, (3981), 22 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:29,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:29,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 18:57:29,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:57:32,394 INFO L130 PetriNetUnfolder]: 3109/5387 cut-off events. [2023-08-30 18:57:32,395 INFO L131 PetriNetUnfolder]: For 582844/582844 co-relation queries the response was YES. [2023-08-30 18:57:32,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104376 conditions, 5387 events. 3109/5387 cut-off events. For 582844/582844 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 37008 event pairs, 420 based on Foata normal form. 8/5395 useless extension candidates. Maximal degree in co-relation 104166. Up to 2409 conditions per place. [2023-08-30 18:57:32,494 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 271 selfloop transitions, 429 changer transitions 6/706 dead transitions. [2023-08-30 18:57:32,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 706 transitions, 31185 flow [2023-08-30 18:57:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 18:57:32,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 18:57:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3860 transitions. [2023-08-30 18:57:32,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3758885967474925 [2023-08-30 18:57:32,497 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3860 transitions. [2023-08-30 18:57:32,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3860 transitions. [2023-08-30 18:57:32,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:57:32,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3860 transitions. [2023-08-30 18:57:32,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 183.8095238095238) internal successors, (3860), 21 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:32,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:32,504 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:32,504 INFO L175 Difference]: Start difference. First operand has 430 places, 627 transitions, 28041 flow. Second operand 21 states and 3860 transitions. [2023-08-30 18:57:32,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 706 transitions, 31185 flow [2023-08-30 18:57:34,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 706 transitions, 30949 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-08-30 18:57:34,638 INFO L231 Difference]: Finished difference. Result has 444 places, 640 transitions, 29508 flow [2023-08-30 18:57:34,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=27805, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=29508, PETRI_PLACES=444, PETRI_TRANSITIONS=640} [2023-08-30 18:57:34,639 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 421 predicate places. [2023-08-30 18:57:34,639 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 640 transitions, 29508 flow [2023-08-30 18:57:34,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 180.95454545454547) internal successors, (3981), 22 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:34,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:34,639 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:57:34,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-30 18:57:34,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:34,840 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:57:34,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash 167248611, now seen corresponding path program 54 times [2023-08-30 18:57:34,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:34,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843404865] [2023-08-30 18:57:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:34,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:35,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843404865] [2023-08-30 18:57:35,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843404865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884887700] [2023-08-30 18:57:35,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:57:35,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:35,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:35,313 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:57:35,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-30 18:57:35,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 18:57:35,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:57:35,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:57:35,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:35,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:57:35,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-30 18:57:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:35,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:36,066 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:57:36,067 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 99 [2023-08-30 18:57:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:36,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884887700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:36,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:36,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-30 18:57:36,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310417157] [2023-08-30 18:57:36,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:36,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 18:57:36,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:36,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 18:57:36,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-30 18:57:36,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:57:36,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 640 transitions, 29508 flow. Second operand has 21 states, 21 states have (on average 182.1904761904762) internal successors, (3826), 21 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:36,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:36,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:57:36,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:57:39,480 INFO L130 PetriNetUnfolder]: 3085/5331 cut-off events. [2023-08-30 18:57:39,480 INFO L131 PetriNetUnfolder]: For 600887/600887 co-relation queries the response was YES. [2023-08-30 18:57:39,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105941 conditions, 5331 events. 3085/5331 cut-off events. For 600887/600887 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 36407 event pairs, 465 based on Foata normal form. 8/5339 useless extension candidates. Maximal degree in co-relation 105728. Up to 2617 conditions per place. [2023-08-30 18:57:39,815 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 300 selfloop transitions, 379 changer transitions 9/688 dead transitions. [2023-08-30 18:57:39,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 688 transitions, 31480 flow [2023-08-30 18:57:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 18:57:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 18:57:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3144 transitions. [2023-08-30 18:57:39,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782028148682786 [2023-08-30 18:57:39,827 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3144 transitions. [2023-08-30 18:57:39,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3144 transitions. [2023-08-30 18:57:39,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:57:39,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3144 transitions. [2023-08-30 18:57:39,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 184.94117647058823) internal successors, (3144), 17 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:39,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:39,833 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:39,833 INFO L175 Difference]: Start difference. First operand has 444 places, 640 transitions, 29508 flow. Second operand 17 states and 3144 transitions. [2023-08-30 18:57:39,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 688 transitions, 31480 flow [2023-08-30 18:57:42,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 688 transitions, 30868 flow, removed 59 selfloop flow, removed 42 redundant places. [2023-08-30 18:57:42,248 INFO L231 Difference]: Finished difference. Result has 417 places, 637 transitions, 29598 flow [2023-08-30 18:57:42,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=28859, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=29598, PETRI_PLACES=417, PETRI_TRANSITIONS=637} [2023-08-30 18:57:42,249 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 394 predicate places. [2023-08-30 18:57:42,249 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 637 transitions, 29598 flow [2023-08-30 18:57:42,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.1904761904762) internal successors, (3826), 21 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:42,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:42,250 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:57:42,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-30 18:57:42,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-08-30 18:57:42,457 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:57:42,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash 87706125, now seen corresponding path program 55 times [2023-08-30 18:57:42,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:42,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306905578] [2023-08-30 18:57:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:42,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:42,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306905578] [2023-08-30 18:57:42,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306905578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:42,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21929815] [2023-08-30 18:57:42,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:57:42,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:42,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:42,893 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:57:42,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-30 18:57:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:43,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:57:43,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:43,300 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:57:43,300 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 26 treesize of output 14 [2023-08-30 18:57:43,309 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:57:43,309 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 25 treesize of output 9 [2023-08-30 18:57:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:43,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:43,577 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:57:43,577 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 [2023-08-30 18:57:43,592 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:57:43,592 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 [2023-08-30 18:57:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:43,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21929815] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:43,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:43,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-30 18:57:43,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635673527] [2023-08-30 18:57:43,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:43,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 18:57:43,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:43,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 18:57:43,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-08-30 18:57:44,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:57:44,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 637 transitions, 29598 flow. Second operand has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:44,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:44,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:57:44,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:57:46,691 INFO L130 PetriNetUnfolder]: 3073/5289 cut-off events. [2023-08-30 18:57:46,691 INFO L131 PetriNetUnfolder]: For 626232/626232 co-relation queries the response was YES. [2023-08-30 18:57:46,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106459 conditions, 5289 events. 3073/5289 cut-off events. For 626232/626232 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 35850 event pairs, 420 based on Foata normal form. 8/5297 useless extension candidates. Maximal degree in co-relation 106309. Up to 2467 conditions per place. [2023-08-30 18:57:46,909 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 256 selfloop transitions, 420 changer transitions 3/679 dead transitions. [2023-08-30 18:57:46,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 679 transitions, 31668 flow [2023-08-30 18:57:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:57:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:57:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2588 transitions. [2023-08-30 18:57:46,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780309669880222 [2023-08-30 18:57:46,911 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2588 transitions. [2023-08-30 18:57:46,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2588 transitions. [2023-08-30 18:57:46,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:57:46,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2588 transitions. [2023-08-30 18:57:46,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 184.85714285714286) internal successors, (2588), 14 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:46,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:46,916 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:46,916 INFO L175 Difference]: Start difference. First operand has 417 places, 637 transitions, 29598 flow. Second operand 14 states and 2588 transitions. [2023-08-30 18:57:46,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 679 transitions, 31668 flow [2023-08-30 18:57:48,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 679 transitions, 31116 flow, removed 29 selfloop flow, removed 16 redundant places. [2023-08-30 18:57:49,001 INFO L231 Difference]: Finished difference. Result has 411 places, 639 transitions, 30066 flow [2023-08-30 18:57:49,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=29046, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=30066, PETRI_PLACES=411, PETRI_TRANSITIONS=639} [2023-08-30 18:57:49,002 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 388 predicate places. [2023-08-30 18:57:49,002 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 639 transitions, 30066 flow [2023-08-30 18:57:49,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:49,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:49,003 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:57:49,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-30 18:57:49,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-08-30 18:57:49,204 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:57:49,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:49,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1442272687, now seen corresponding path program 56 times [2023-08-30 18:57:49,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:49,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862891234] [2023-08-30 18:57:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:49,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:49,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:49,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862891234] [2023-08-30 18:57:49,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862891234] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:49,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769723419] [2023-08-30 18:57:49,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:57:49,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:49,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:49,761 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:57:49,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-30 18:57:50,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:57:50,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:57:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:57:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:50,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:57:50,170 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 46 treesize of output 30 [2023-08-30 18:57:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:50,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:50,381 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:57:50,381 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 [2023-08-30 18:57:50,396 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:57:50,397 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 20 treesize of output 4 [2023-08-30 18:57:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:50,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769723419] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:50,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:50,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 18:57:50,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129785904] [2023-08-30 18:57:50,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:50,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:57:50,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:57:50,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:57:51,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:57:51,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 639 transitions, 30066 flow. Second operand has 20 states, 20 states have (on average 182.05) internal successors, (3641), 20 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:51,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:51,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:57:51,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:57:53,710 INFO L130 PetriNetUnfolder]: 3053/5249 cut-off events. [2023-08-30 18:57:53,710 INFO L131 PetriNetUnfolder]: For 638200/638200 co-relation queries the response was YES. [2023-08-30 18:57:53,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106465 conditions, 5249 events. 3053/5249 cut-off events. For 638200/638200 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 35492 event pairs, 451 based on Foata normal form. 8/5257 useless extension candidates. Maximal degree in co-relation 106284. Up to 2681 conditions per place. [2023-08-30 18:57:53,797 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 282 selfloop transitions, 389 changer transitions 9/680 dead transitions. [2023-08-30 18:57:53,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 680 transitions, 31958 flow [2023-08-30 18:57:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:57:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:57:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2772 transitions. [2023-08-30 18:57:53,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37791411042944784 [2023-08-30 18:57:53,800 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2772 transitions. [2023-08-30 18:57:53,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2772 transitions. [2023-08-30 18:57:53,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:57:53,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2772 transitions. [2023-08-30 18:57:53,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 184.8) internal successors, (2772), 15 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:53,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:53,805 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:53,805 INFO L175 Difference]: Start difference. First operand has 411 places, 639 transitions, 30066 flow. Second operand 15 states and 2772 transitions. [2023-08-30 18:57:53,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 680 transitions, 31958 flow [2023-08-30 18:57:56,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 680 transitions, 31425 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-08-30 18:57:56,129 INFO L231 Difference]: Finished difference. Result has 416 places, 636 transitions, 30234 flow [2023-08-30 18:57:56,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=29475, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=30234, PETRI_PLACES=416, PETRI_TRANSITIONS=636} [2023-08-30 18:57:56,131 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 393 predicate places. [2023-08-30 18:57:56,131 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 636 transitions, 30234 flow [2023-08-30 18:57:56,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.05) internal successors, (3641), 20 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:56,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:57:56,132 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:57:56,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-08-30 18:57:56,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:56,339 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:57:56,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:57:56,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1213677715, now seen corresponding path program 57 times [2023-08-30 18:57:56,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:57:56,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330610065] [2023-08-30 18:57:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:57:56,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:57:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:57:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:56,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:57:56,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330610065] [2023-08-30 18:57:56,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330610065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:57:56,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270640248] [2023-08-30 18:57:56,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:57:56,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:57:56,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:57:56,749 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:57:56,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-30 18:57:57,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 18:57:57,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:57:57,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:57:57,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:57:57,218 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:57:57,218 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 55 treesize of output 23 [2023-08-30 18:57:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:57,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:57:57,367 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:57:57,367 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 [2023-08-30 18:57:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:57:57,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270640248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:57:57,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:57:57,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-30 18:57:57,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207153977] [2023-08-30 18:57:57,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:57:57,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 18:57:57,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:57:57,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 18:57:57,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-30 18:57:57,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 18:57:57,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 636 transitions, 30234 flow. Second operand has 19 states, 19 states have (on average 181.3684210526316) internal successors, (3446), 19 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:57:57,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:57:57,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 18:57:57,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:58:00,657 INFO L130 PetriNetUnfolder]: 3277/5633 cut-off events. [2023-08-30 18:58:00,657 INFO L131 PetriNetUnfolder]: For 670259/670259 co-relation queries the response was YES. [2023-08-30 18:58:00,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113429 conditions, 5633 events. 3277/5633 cut-off events. For 670259/670259 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 38492 event pairs, 312 based on Foata normal form. 28/5661 useless extension candidates. Maximal degree in co-relation 113248. Up to 2242 conditions per place. [2023-08-30 18:58:00,741 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 397 selfloop transitions, 329 changer transitions 3/729 dead transitions. [2023-08-30 18:58:00,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 729 transitions, 34377 flow [2023-08-30 18:58:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:58:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:58:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2233 transitions. [2023-08-30 18:58:00,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38053851397409677 [2023-08-30 18:58:00,743 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2233 transitions. [2023-08-30 18:58:00,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2233 transitions. [2023-08-30 18:58:00,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:58:00,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2233 transitions. [2023-08-30 18:58:00,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.08333333333334) internal successors, (2233), 12 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:00,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:00,747 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:00,747 INFO L175 Difference]: Start difference. First operand has 416 places, 636 transitions, 30234 flow. Second operand 12 states and 2233 transitions. [2023-08-30 18:58:00,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 729 transitions, 34377 flow [2023-08-30 18:58:02,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 729 transitions, 33682 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-08-30 18:58:02,901 INFO L231 Difference]: Finished difference. Result has 413 places, 651 transitions, 30884 flow [2023-08-30 18:58:02,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=29576, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=30884, PETRI_PLACES=413, PETRI_TRANSITIONS=651} [2023-08-30 18:58:02,902 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 390 predicate places. [2023-08-30 18:58:02,902 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 651 transitions, 30884 flow [2023-08-30 18:58:02,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 181.3684210526316) internal successors, (3446), 19 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:02,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:58:02,902 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:58:02,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-30 18:58:03,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:58:03,103 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:58:03,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:58:03,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1242893095, now seen corresponding path program 58 times [2023-08-30 18:58:03,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:58:03,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98507964] [2023-08-30 18:58:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:58:03,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:58:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:58:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:03,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:58:03,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98507964] [2023-08-30 18:58:03,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98507964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:58:03,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068339493] [2023-08-30 18:58:03,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:58:03,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:58:03,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:58:03,596 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:58:03,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-30 18:58:03,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:58:03,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:58:03,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:58:03,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:58:04,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:58:04,000 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 65 treesize of output 41 [2023-08-30 18:58:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:04,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:58:04,189 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:58:04,189 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 [2023-08-30 18:58:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:04,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068339493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:58:04,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:58:04,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-30 18:58:04,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939233695] [2023-08-30 18:58:04,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:58:04,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 18:58:04,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:58:04,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 18:58:04,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-08-30 18:58:04,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 18:58:04,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 651 transitions, 30884 flow. Second operand has 21 states, 21 states have (on average 181.04761904761904) internal successors, (3802), 21 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:04,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:58:04,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 18:58:04,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:58:07,449 INFO L130 PetriNetUnfolder]: 3273/5629 cut-off events. [2023-08-30 18:58:07,449 INFO L131 PetriNetUnfolder]: For 698486/698486 co-relation queries the response was YES. [2023-08-30 18:58:07,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114674 conditions, 5629 events. 3273/5629 cut-off events. For 698486/698486 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 38395 event pairs, 547 based on Foata normal form. 4/5633 useless extension candidates. Maximal degree in co-relation 114488. Up to 2490 conditions per place. [2023-08-30 18:58:07,548 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 409 selfloop transitions, 261 changer transitions 1/671 dead transitions. [2023-08-30 18:58:07,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 671 transitions, 32692 flow [2023-08-30 18:58:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:58:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:58:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1846 transitions. [2023-08-30 18:58:07,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37750511247443763 [2023-08-30 18:58:07,550 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1846 transitions. [2023-08-30 18:58:07,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1846 transitions. [2023-08-30 18:58:07,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:58:07,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1846 transitions. [2023-08-30 18:58:07,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.6) internal successors, (1846), 10 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:07,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:07,554 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:07,554 INFO L175 Difference]: Start difference. First operand has 413 places, 651 transitions, 30884 flow. Second operand 10 states and 1846 transitions. [2023-08-30 18:58:07,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 671 transitions, 32692 flow [2023-08-30 18:58:10,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 671 transitions, 32291 flow, removed 89 selfloop flow, removed 8 redundant places. [2023-08-30 18:58:10,133 INFO L231 Difference]: Finished difference. Result has 416 places, 654 transitions, 31190 flow [2023-08-30 18:58:10,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=30485, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=31190, PETRI_PLACES=416, PETRI_TRANSITIONS=654} [2023-08-30 18:58:10,134 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 393 predicate places. [2023-08-30 18:58:10,134 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 654 transitions, 31190 flow [2023-08-30 18:58:10,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 181.04761904761904) internal successors, (3802), 21 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:10,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:58:10,134 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:58:10,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-08-30 18:58:10,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-30 18:58:10,335 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:58:10,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:58:10,335 INFO L85 PathProgramCache]: Analyzing trace with hash 720970391, now seen corresponding path program 59 times [2023-08-30 18:58:10,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:58:10,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022403783] [2023-08-30 18:58:10,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:58:10,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:58:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:58:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:10,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:58:10,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022403783] [2023-08-30 18:58:10,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022403783] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:58:10,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054385042] [2023-08-30 18:58:10,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:58:10,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:58:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:58:10,872 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:58:10,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-30 18:58:11,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:58:11,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:58:11,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-30 18:58:11,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:58:11,461 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:58:11,461 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 25 treesize of output 9 [2023-08-30 18:58:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:11,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:58:11,790 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:58:11,791 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 [2023-08-30 18:58:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:11,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054385042] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:58:11,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:58:11,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 26 [2023-08-30 18:58:11,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145692518] [2023-08-30 18:58:11,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:58:11,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 18:58:11,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:58:11,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 18:58:11,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2023-08-30 18:58:12,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-30 18:58:12,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 654 transitions, 31190 flow. Second operand has 26 states, 26 states have (on average 179.0) internal successors, (4654), 26 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:12,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:58:12,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-30 18:58:12,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:58:16,030 INFO L130 PetriNetUnfolder]: 3423/5895 cut-off events. [2023-08-30 18:58:16,031 INFO L131 PetriNetUnfolder]: For 726643/726643 co-relation queries the response was YES. [2023-08-30 18:58:16,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120433 conditions, 5895 events. 3423/5895 cut-off events. For 726643/726643 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 40514 event pairs, 114 based on Foata normal form. 48/5943 useless extension candidates. Maximal degree in co-relation 120244. Up to 2298 conditions per place. [2023-08-30 18:58:16,141 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 268 selfloop transitions, 480 changer transitions 3/751 dead transitions. [2023-08-30 18:58:16,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 751 transitions, 34865 flow [2023-08-30 18:58:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 18:58:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 18:58:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4385 transitions. [2023-08-30 18:58:16,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37363667348329926 [2023-08-30 18:58:16,145 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4385 transitions. [2023-08-30 18:58:16,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4385 transitions. [2023-08-30 18:58:16,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:58:16,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4385 transitions. [2023-08-30 18:58:16,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 182.70833333333334) internal successors, (4385), 24 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:16,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:16,155 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:16,155 INFO L175 Difference]: Start difference. First operand has 416 places, 654 transitions, 31190 flow. Second operand 24 states and 4385 transitions. [2023-08-30 18:58:16,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 751 transitions, 34865 flow [2023-08-30 18:58:19,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 751 transitions, 34278 flow, removed 40 selfloop flow, removed 7 redundant places. [2023-08-30 18:58:19,048 INFO L231 Difference]: Finished difference. Result has 441 places, 686 transitions, 33350 flow [2023-08-30 18:58:19,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=30577, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=33350, PETRI_PLACES=441, PETRI_TRANSITIONS=686} [2023-08-30 18:58:19,049 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 418 predicate places. [2023-08-30 18:58:19,049 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 686 transitions, 33350 flow [2023-08-30 18:58:19,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 179.0) internal successors, (4654), 26 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:19,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:58:19,050 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:58:19,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-30 18:58:19,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-30 18:58:19,250 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:58:19,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:58:19,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1614998053, now seen corresponding path program 60 times [2023-08-30 18:58:19,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:58:19,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619485707] [2023-08-30 18:58:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:58:19,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:58:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:58:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:19,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:58:19,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619485707] [2023-08-30 18:58:19,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619485707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:58:19,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245983548] [2023-08-30 18:58:19,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:58:19,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:58:19,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:58:19,785 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:58:19,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-30 18:58:20,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 18:58:20,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:58:20,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 18:58:20,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:58:20,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:58:20,367 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 65 treesize of output 41 [2023-08-30 18:58:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:20,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:58:20,671 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:58:20,671 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 [2023-08-30 18:58:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:20,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245983548] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:58:20,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:58:20,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2023-08-30 18:58:20,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137637256] [2023-08-30 18:58:20,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:58:20,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 18:58:20,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:58:20,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 18:58:20,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-08-30 18:58:21,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 18:58:21,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 686 transitions, 33350 flow. Second operand has 25 states, 25 states have (on average 180.84) internal successors, (4521), 25 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:21,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:58:21,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 18:58:21,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:58:25,597 INFO L130 PetriNetUnfolder]: 3533/6097 cut-off events. [2023-08-30 18:58:25,597 INFO L131 PetriNetUnfolder]: For 807214/807214 co-relation queries the response was YES. [2023-08-30 18:58:25,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128170 conditions, 6097 events. 3533/6097 cut-off events. For 807214/807214 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 42204 event pairs, 200 based on Foata normal form. 36/6133 useless extension candidates. Maximal degree in co-relation 127972. Up to 2354 conditions per place. [2023-08-30 18:58:25,798 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 344 selfloop transitions, 479 changer transitions 6/829 dead transitions. [2023-08-30 18:58:25,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 829 transitions, 38964 flow [2023-08-30 18:58:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 18:58:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 18:58:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4799 transitions. [2023-08-30 18:58:25,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774579204027057 [2023-08-30 18:58:25,801 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4799 transitions. [2023-08-30 18:58:25,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4799 transitions. [2023-08-30 18:58:25,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:58:25,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4799 transitions. [2023-08-30 18:58:25,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 184.57692307692307) internal successors, (4799), 26 states have internal predecessors, (4799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:25,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:25,810 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:25,810 INFO L175 Difference]: Start difference. First operand has 441 places, 686 transitions, 33350 flow. Second operand 26 states and 4799 transitions. [2023-08-30 18:58:25,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 829 transitions, 38964 flow [2023-08-30 18:58:29,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 829 transitions, 37770 flow, removed 324 selfloop flow, removed 11 redundant places. [2023-08-30 18:58:29,096 INFO L231 Difference]: Finished difference. Result has 461 places, 738 transitions, 35801 flow [2023-08-30 18:58:29,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=32304, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=35801, PETRI_PLACES=461, PETRI_TRANSITIONS=738} [2023-08-30 18:58:29,097 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 438 predicate places. [2023-08-30 18:58:29,097 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 738 transitions, 35801 flow [2023-08-30 18:58:29,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 180.84) internal successors, (4521), 25 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:29,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:58:29,098 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:58:29,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-30 18:58:29,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:58:29,299 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:58:29,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:58:29,299 INFO L85 PathProgramCache]: Analyzing trace with hash 676070159, now seen corresponding path program 61 times [2023-08-30 18:58:29,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:58:29,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145961877] [2023-08-30 18:58:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:58:29,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:58:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:58:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:29,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:58:29,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145961877] [2023-08-30 18:58:29,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145961877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:58:29,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574511339] [2023-08-30 18:58:29,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:58:29,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:58:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:58:29,715 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:58:29,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-30 18:58:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:58:30,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:58:30,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:58:30,196 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:58:30,197 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 36 treesize of output 12 [2023-08-30 18:58:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:30,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:58:30,378 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:58:30,378 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 [2023-08-30 18:58:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:30,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574511339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:58:30,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:58:30,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-30 18:58:30,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537299485] [2023-08-30 18:58:30,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:58:30,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:58:30,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:58:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:58:30,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:58:30,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-30 18:58:30,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 738 transitions, 35801 flow. Second operand has 18 states, 18 states have (on average 183.38888888888889) internal successors, (3301), 18 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:30,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:58:30,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-30 18:58:30,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:58:33,613 INFO L130 PetriNetUnfolder]: 3575/6167 cut-off events. [2023-08-30 18:58:33,613 INFO L131 PetriNetUnfolder]: For 966454/966454 co-relation queries the response was YES. [2023-08-30 18:58:33,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134651 conditions, 6167 events. 3575/6167 cut-off events. For 966454/966454 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 42888 event pairs, 1307 based on Foata normal form. 24/6191 useless extension candidates. Maximal degree in co-relation 134450. Up to 5449 conditions per place. [2023-08-30 18:58:33,710 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 606 selfloop transitions, 161 changer transitions 1/768 dead transitions. [2023-08-30 18:58:33,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 768 transitions, 38014 flow [2023-08-30 18:58:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:58:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:58:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1869 transitions. [2023-08-30 18:58:33,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38220858895705523 [2023-08-30 18:58:33,712 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1869 transitions. [2023-08-30 18:58:33,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1869 transitions. [2023-08-30 18:58:33,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:58:33,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1869 transitions. [2023-08-30 18:58:33,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 186.9) internal successors, (1869), 10 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) [2023-08-30 18:58:33,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:33,716 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:33,716 INFO L175 Difference]: Start difference. First operand has 461 places, 738 transitions, 35801 flow. Second operand 10 states and 1869 transitions. [2023-08-30 18:58:33,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 768 transitions, 38014 flow [2023-08-30 18:58:37,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 768 transitions, 36682 flow, removed 234 selfloop flow, removed 15 redundant places. [2023-08-30 18:58:37,467 INFO L231 Difference]: Finished difference. Result has 455 places, 745 transitions, 35093 flow [2023-08-30 18:58:37,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=34406, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=35093, PETRI_PLACES=455, PETRI_TRANSITIONS=745} [2023-08-30 18:58:37,467 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 432 predicate places. [2023-08-30 18:58:37,468 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 745 transitions, 35093 flow [2023-08-30 18:58:37,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.38888888888889) internal successors, (3301), 18 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:37,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:58:37,468 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:58:37,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-30 18:58:37,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-30 18:58:37,669 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:58:37,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:58:37,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1936515247, now seen corresponding path program 62 times [2023-08-30 18:58:37,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:58:37,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312097804] [2023-08-30 18:58:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:58:37,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:58:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:58:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:38,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:58:38,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312097804] [2023-08-30 18:58:38,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312097804] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:58:38,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161740649] [2023-08-30 18:58:38,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:58:38,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:58:38,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:58:38,141 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:58:38,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-30 18:58:38,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:58:38,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:58:38,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 18:58:38,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:58:38,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:58:38,563 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 46 treesize of output 30 [2023-08-30 18:58:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:38,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:58:39,024 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:58:39,024 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 [2023-08-30 18:58:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:39,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161740649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:58:39,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:58:39,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2023-08-30 18:58:39,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586270161] [2023-08-30 18:58:39,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:58:39,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 18:58:39,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:58:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 18:58:39,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-08-30 18:58:40,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-30 18:58:40,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 745 transitions, 35093 flow. Second operand has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:40,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:58:40,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-30 18:58:40,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:58:43,970 INFO L130 PetriNetUnfolder]: 3661/6325 cut-off events. [2023-08-30 18:58:43,970 INFO L131 PetriNetUnfolder]: For 960980/960980 co-relation queries the response was YES. [2023-08-30 18:58:44,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135491 conditions, 6325 events. 3661/6325 cut-off events. For 960980/960980 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 44176 event pairs, 214 based on Foata normal form. 36/6361 useless extension candidates. Maximal degree in co-relation 135292. Up to 4224 conditions per place. [2023-08-30 18:58:44,075 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 319 selfloop transitions, 490 changer transitions 4/813 dead transitions. [2023-08-30 18:58:44,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 813 transitions, 38179 flow [2023-08-30 18:58:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:58:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:58:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4004 transitions. [2023-08-30 18:58:44,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721881390593047 [2023-08-30 18:58:44,078 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4004 transitions. [2023-08-30 18:58:44,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4004 transitions. [2023-08-30 18:58:44,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:58:44,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4004 transitions. [2023-08-30 18:58:44,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 182.0) internal successors, (4004), 22 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:44,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:44,085 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:44,085 INFO L175 Difference]: Start difference. First operand has 455 places, 745 transitions, 35093 flow. Second operand 22 states and 4004 transitions. [2023-08-30 18:58:44,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 813 transitions, 38179 flow [2023-08-30 18:58:47,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 813 transitions, 37698 flow, removed 86 selfloop flow, removed 7 redundant places. [2023-08-30 18:58:47,927 INFO L231 Difference]: Finished difference. Result has 479 places, 767 transitions, 37546 flow [2023-08-30 18:58:47,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=34537, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=37546, PETRI_PLACES=479, PETRI_TRANSITIONS=767} [2023-08-30 18:58:47,927 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 456 predicate places. [2023-08-30 18:58:47,927 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 767 transitions, 37546 flow [2023-08-30 18:58:47,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:47,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:58:47,928 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:58:47,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-30 18:58:48,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:58:48,129 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:58:48,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:58:48,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1249451595, now seen corresponding path program 63 times [2023-08-30 18:58:48,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:58:48,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674863247] [2023-08-30 18:58:48,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:58:48,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:58:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:58:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 18:58:49,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:58:49,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674863247] [2023-08-30 18:58:49,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674863247] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:58:49,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438965369] [2023-08-30 18:58:49,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:58:49,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:58:49,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:58:49,194 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:58:49,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-30 18:58:49,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 18:58:49,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:58:49,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 18:58:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:58:49,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:58:49,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 61 [2023-08-30 18:58:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:49,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:58:50,011 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:58:50,011 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 [2023-08-30 18:58:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:58:50,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438965369] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:58:50,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:58:50,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 8] total 29 [2023-08-30 18:58:50,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155545772] [2023-08-30 18:58:50,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:58:50,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 18:58:50,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:58:50,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 18:58:50,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-08-30 18:58:51,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 489 [2023-08-30 18:58:51,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 767 transitions, 37546 flow. Second operand has 29 states, 29 states have (on average 168.86206896551724) internal successors, (4897), 29 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:51,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:58:51,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 489 [2023-08-30 18:58:51,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:58:56,190 INFO L130 PetriNetUnfolder]: 3789/6641 cut-off events. [2023-08-30 18:58:56,190 INFO L131 PetriNetUnfolder]: For 1163331/1163331 co-relation queries the response was YES. [2023-08-30 18:58:56,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148332 conditions, 6641 events. 3789/6641 cut-off events. For 1163331/1163331 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 47289 event pairs, 1303 based on Foata normal form. 28/6669 useless extension candidates. Maximal degree in co-relation 148124. Up to 5563 conditions per place. [2023-08-30 18:58:56,304 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 631 selfloop transitions, 203 changer transitions 4/838 dead transitions. [2023-08-30 18:58:56,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 838 transitions, 40963 flow [2023-08-30 18:58:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 18:58:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 18:58:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4282 transitions. [2023-08-30 18:58:56,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35026584867075666 [2023-08-30 18:58:56,309 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4282 transitions. [2023-08-30 18:58:56,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4282 transitions. [2023-08-30 18:58:56,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:58:56,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4282 transitions. [2023-08-30 18:58:56,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 171.28) internal successors, (4282), 25 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:56,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:56,320 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:58:56,320 INFO L175 Difference]: Start difference. First operand has 479 places, 767 transitions, 37546 flow. Second operand 25 states and 4282 transitions. [2023-08-30 18:58:56,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 838 transitions, 40963 flow [2023-08-30 18:59:01,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 838 transitions, 40246 flow, removed 256 selfloop flow, removed 10 redundant places. [2023-08-30 18:59:01,070 INFO L231 Difference]: Finished difference. Result has 494 places, 788 transitions, 38687 flow [2023-08-30 18:59:01,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=36682, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=38687, PETRI_PLACES=494, PETRI_TRANSITIONS=788} [2023-08-30 18:59:01,071 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 471 predicate places. [2023-08-30 18:59:01,072 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 788 transitions, 38687 flow [2023-08-30 18:59:01,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 168.86206896551724) internal successors, (4897), 29 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:01,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:01,073 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:01,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:01,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:01,281 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:01,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:01,281 INFO L85 PathProgramCache]: Analyzing trace with hash 884843709, now seen corresponding path program 64 times [2023-08-30 18:59:01,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:01,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381118583] [2023-08-30 18:59:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:01,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:01,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:01,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381118583] [2023-08-30 18:59:01,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381118583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:01,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676701481] [2023-08-30 18:59:01,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:59:01,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:01,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:01,707 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:59:01,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-30 18:59:02,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:59:02,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:59:02,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:59:02,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:02,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:02,348 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-30 18:59:02,348 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 [2023-08-30 18:59:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:02,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676701481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:02,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:02,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 18:59:02,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926395736] [2023-08-30 18:59:02,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:02,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:59:02,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:02,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:59:02,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:59:03,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:59:03,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 788 transitions, 38687 flow. Second operand has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:03,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:03,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:59:03,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:06,350 INFO L130 PetriNetUnfolder]: 3761/6567 cut-off events. [2023-08-30 18:59:06,350 INFO L131 PetriNetUnfolder]: For 1165669/1165669 co-relation queries the response was YES. [2023-08-30 18:59:06,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147670 conditions, 6567 events. 3761/6567 cut-off events. For 1165669/1165669 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 46387 event pairs, 1415 based on Foata normal form. 4/6571 useless extension candidates. Maximal degree in co-relation 147454. Up to 5935 conditions per place. [2023-08-30 18:59:06,515 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 646 selfloop transitions, 147 changer transitions 6/799 dead transitions. [2023-08-30 18:59:06,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 799 transitions, 40360 flow [2023-08-30 18:59:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:59:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:59:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1666 transitions. [2023-08-30 18:59:06,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3785503294705749 [2023-08-30 18:59:06,518 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1666 transitions. [2023-08-30 18:59:06,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1666 transitions. [2023-08-30 18:59:06,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:06,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1666 transitions. [2023-08-30 18:59:06,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 185.11111111111111) internal successors, (1666), 9 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:06,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:06,522 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:06,523 INFO L175 Difference]: Start difference. First operand has 494 places, 788 transitions, 38687 flow. Second operand 9 states and 1666 transitions. [2023-08-30 18:59:06,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 799 transitions, 40360 flow [2023-08-30 18:59:11,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 799 transitions, 39470 flow, removed 326 selfloop flow, removed 15 redundant places. [2023-08-30 18:59:11,569 INFO L231 Difference]: Finished difference. Result has 487 places, 785 transitions, 37984 flow [2023-08-30 18:59:11,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=37797, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=37984, PETRI_PLACES=487, PETRI_TRANSITIONS=785} [2023-08-30 18:59:11,570 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 464 predicate places. [2023-08-30 18:59:11,570 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 785 transitions, 37984 flow [2023-08-30 18:59:11,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:11,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:11,570 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:11,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:11,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-08-30 18:59:11,771 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:11,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:11,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1901886359, now seen corresponding path program 65 times [2023-08-30 18:59:11,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:11,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924212686] [2023-08-30 18:59:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:11,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:12,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:12,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924212686] [2023-08-30 18:59:12,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924212686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:12,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335903859] [2023-08-30 18:59:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:59:12,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:12,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:12,276 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:59:12,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-30 18:59:12,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:59:12,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:59:12,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:59:12,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:12,755 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:59:12,755 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 36 treesize of output 12 [2023-08-30 18:59:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:12,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:12,887 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:59:12,887 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 [2023-08-30 18:59:12,921 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:59:12,921 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 [2023-08-30 18:59:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:12,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335903859] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:12,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:12,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-30 18:59:12,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681676906] [2023-08-30 18:59:12,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:12,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:59:12,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:59:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:59:13,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-30 18:59:13,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 785 transitions, 37984 flow. Second operand has 18 states, 18 states have (on average 183.38888888888889) internal successors, (3301), 18 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:13,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:13,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-30 18:59:13,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:16,710 INFO L130 PetriNetUnfolder]: 3779/6593 cut-off events. [2023-08-30 18:59:16,710 INFO L131 PetriNetUnfolder]: For 1081776/1081776 co-relation queries the response was YES. [2023-08-30 18:59:16,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144240 conditions, 6593 events. 3779/6593 cut-off events. For 1081776/1081776 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 46629 event pairs, 1418 based on Foata normal form. 24/6617 useless extension candidates. Maximal degree in co-relation 144030. Up to 5879 conditions per place. [2023-08-30 18:59:16,828 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 670 selfloop transitions, 141 changer transitions 0/811 dead transitions. [2023-08-30 18:59:16,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 811 transitions, 40303 flow [2023-08-30 18:59:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:59:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:59:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1866 transitions. [2023-08-30 18:59:16,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3815950920245399 [2023-08-30 18:59:16,839 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1866 transitions. [2023-08-30 18:59:16,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1866 transitions. [2023-08-30 18:59:16,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:16,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1866 transitions. [2023-08-30 18:59:16,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 186.6) internal successors, (1866), 10 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:16,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:16,843 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:16,843 INFO L175 Difference]: Start difference. First operand has 487 places, 785 transitions, 37984 flow. Second operand 10 states and 1866 transitions. [2023-08-30 18:59:16,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 811 transitions, 40303 flow [2023-08-30 18:59:21,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 811 transitions, 39985 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-30 18:59:21,295 INFO L231 Difference]: Finished difference. Result has 486 places, 792 transitions, 38284 flow [2023-08-30 18:59:21,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=37601, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=38284, PETRI_PLACES=486, PETRI_TRANSITIONS=792} [2023-08-30 18:59:21,296 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 463 predicate places. [2023-08-30 18:59:21,297 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 792 transitions, 38284 flow [2023-08-30 18:59:21,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.38888888888889) internal successors, (3301), 18 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:21,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:21,297 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:21,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:21,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:21,498 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:21,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:21,498 INFO L85 PathProgramCache]: Analyzing trace with hash -287115501, now seen corresponding path program 66 times [2023-08-30 18:59:21,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:21,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824900065] [2023-08-30 18:59:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:21,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:21,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:21,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824900065] [2023-08-30 18:59:21,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824900065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:21,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541780811] [2023-08-30 18:59:21,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:59:21,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:21,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:21,991 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:59:21,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-30 18:59:22,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 18:59:22,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:59:22,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 18:59:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:22,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:59:22,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-30 18:59:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:22,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:22,815 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:59:22,815 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 [2023-08-30 18:59:22,849 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:59:22,850 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 [2023-08-30 18:59:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:22,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541780811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:22,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:22,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-08-30 18:59:22,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707716986] [2023-08-30 18:59:22,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:22,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 18:59:22,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:22,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 18:59:22,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-08-30 18:59:23,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:59:23,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 792 transitions, 38284 flow. Second operand has 21 states, 21 states have (on average 182.14285714285714) internal successors, (3825), 21 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:23,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:23,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:59:23,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:27,298 INFO L130 PetriNetUnfolder]: 3813/6683 cut-off events. [2023-08-30 18:59:27,298 INFO L131 PetriNetUnfolder]: For 1097416/1097416 co-relation queries the response was YES. [2023-08-30 18:59:27,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146527 conditions, 6683 events. 3813/6683 cut-off events. For 1097416/1097416 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 47616 event pairs, 619 based on Foata normal form. 16/6699 useless extension candidates. Maximal degree in co-relation 146316. Up to 3469 conditions per place. [2023-08-30 18:59:27,420 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 400 selfloop transitions, 439 changer transitions 5/844 dead transitions. [2023-08-30 18:59:27,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 844 transitions, 40942 flow [2023-08-30 18:59:27,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 18:59:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 18:59:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2964 transitions. [2023-08-30 18:59:27,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37883435582822084 [2023-08-30 18:59:27,423 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2964 transitions. [2023-08-30 18:59:27,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2964 transitions. [2023-08-30 18:59:27,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:27,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2964 transitions. [2023-08-30 18:59:27,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 185.25) internal successors, (2964), 16 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:27,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:27,428 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:27,428 INFO L175 Difference]: Start difference. First operand has 486 places, 792 transitions, 38284 flow. Second operand 16 states and 2964 transitions. [2023-08-30 18:59:27,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 844 transitions, 40942 flow [2023-08-30 18:59:32,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 844 transitions, 40511 flow, removed 86 selfloop flow, removed 5 redundant places. [2023-08-30 18:59:32,110 INFO L231 Difference]: Finished difference. Result has 500 places, 799 transitions, 39208 flow [2023-08-30 18:59:32,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=37853, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=39208, PETRI_PLACES=500, PETRI_TRANSITIONS=799} [2023-08-30 18:59:32,111 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 477 predicate places. [2023-08-30 18:59:32,111 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 799 transitions, 39208 flow [2023-08-30 18:59:32,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.14285714285714) internal successors, (3825), 21 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:32,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:32,112 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:32,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:32,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:32,312 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:32,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:32,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1259857799, now seen corresponding path program 67 times [2023-08-30 18:59:32,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:32,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668113712] [2023-08-30 18:59:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:32,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:32,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:32,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668113712] [2023-08-30 18:59:32,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668113712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:32,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093803495] [2023-08-30 18:59:32,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:59:32,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:32,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:32,845 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:59:32,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-30 18:59:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:33,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 18:59:33,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:33,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:59:33,299 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 46 treesize of output 30 [2023-08-30 18:59:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:33,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:33,492 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:59:33,492 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 [2023-08-30 18:59:33,527 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:59:33,527 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 [2023-08-30 18:59:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093803495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:33,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:33,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-08-30 18:59:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163459214] [2023-08-30 18:59:33,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:33,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:59:33,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:33,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:59:33,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:59:34,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 18:59:34,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 799 transitions, 39208 flow. Second operand has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:34,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:34,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 18:59:34,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:37,963 INFO L130 PetriNetUnfolder]: 3841/6763 cut-off events. [2023-08-30 18:59:37,963 INFO L131 PetriNetUnfolder]: For 1225060/1225060 co-relation queries the response was YES. [2023-08-30 18:59:38,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152509 conditions, 6763 events. 3841/6763 cut-off events. For 1225060/1225060 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 48583 event pairs, 1433 based on Foata normal form. 20/6783 useless extension candidates. Maximal degree in co-relation 152294. Up to 6017 conditions per place. [2023-08-30 18:59:38,261 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 682 selfloop transitions, 147 changer transitions 0/829 dead transitions. [2023-08-30 18:59:38,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 829 transitions, 41588 flow [2023-08-30 18:59:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:59:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:59:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2410 transitions. [2023-08-30 18:59:38,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791096429133239 [2023-08-30 18:59:38,263 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2410 transitions. [2023-08-30 18:59:38,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2410 transitions. [2023-08-30 18:59:38,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:38,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2410 transitions. [2023-08-30 18:59:38,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.3846153846154) internal successors, (2410), 13 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:38,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:38,267 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:38,267 INFO L175 Difference]: Start difference. First operand has 500 places, 799 transitions, 39208 flow. Second operand 13 states and 2410 transitions. [2023-08-30 18:59:38,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 829 transitions, 41588 flow [2023-08-30 18:59:43,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 829 transitions, 41180 flow, removed 106 selfloop flow, removed 8 redundant places. [2023-08-30 18:59:43,847 INFO L231 Difference]: Finished difference. Result has 505 places, 805 transitions, 39498 flow [2023-08-30 18:59:43,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=38800, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=39498, PETRI_PLACES=505, PETRI_TRANSITIONS=805} [2023-08-30 18:59:43,848 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 482 predicate places. [2023-08-30 18:59:43,848 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 805 transitions, 39498 flow [2023-08-30 18:59:43,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:43,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:43,849 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:43,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:44,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:44,050 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:44,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:44,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1468189613, now seen corresponding path program 68 times [2023-08-30 18:59:44,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:44,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860585209] [2023-08-30 18:59:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:44,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860585209] [2023-08-30 18:59:44,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860585209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365248055] [2023-08-30 18:59:44,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:59:44,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:44,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:44,575 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:59:44,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-30 18:59:44,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:59:44,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:59:44,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 18:59:44,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:45,062 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:59:45,062 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 26 treesize of output 14 [2023-08-30 18:59:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:45,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:45,268 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:59:45,269 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 [2023-08-30 18:59:45,303 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:59:45,304 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 [2023-08-30 18:59:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:45,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365248055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:45,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:45,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-08-30 18:59:45,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697757718] [2023-08-30 18:59:45,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:45,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 18:59:45,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:45,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 18:59:45,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-08-30 18:59:46,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-30 18:59:46,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 805 transitions, 39498 flow. Second operand has 22 states, 22 states have (on average 179.22727272727272) internal successors, (3943), 22 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:46,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:46,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-30 18:59:46,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:59:49,760 INFO L130 PetriNetUnfolder]: 3829/6727 cut-off events. [2023-08-30 18:59:49,760 INFO L131 PetriNetUnfolder]: For 1206858/1206858 co-relation queries the response was YES. [2023-08-30 18:59:49,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152156 conditions, 6727 events. 3829/6727 cut-off events. For 1206858/1206858 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 48080 event pairs, 274 based on Foata normal form. 4/6731 useless extension candidates. Maximal degree in co-relation 151938. Up to 4706 conditions per place. [2023-08-30 18:59:49,884 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 327 selfloop transitions, 492 changer transitions 6/825 dead transitions. [2023-08-30 18:59:49,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 825 transitions, 41330 flow [2023-08-30 18:59:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:59:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:59:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2186 transitions. [2023-08-30 18:59:49,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3725289706884799 [2023-08-30 18:59:49,886 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2186 transitions. [2023-08-30 18:59:49,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2186 transitions. [2023-08-30 18:59:49,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:59:49,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2186 transitions. [2023-08-30 18:59:49,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 182.16666666666666) internal successors, (2186), 12 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:49,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:49,890 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:49,890 INFO L175 Difference]: Start difference. First operand has 505 places, 805 transitions, 39498 flow. Second operand 12 states and 2186 transitions. [2023-08-30 18:59:49,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 825 transitions, 41330 flow [2023-08-30 18:59:55,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 825 transitions, 40920 flow, removed 64 selfloop flow, removed 8 redundant places. [2023-08-30 18:59:55,042 INFO L231 Difference]: Finished difference. Result has 509 places, 803 transitions, 39969 flow [2023-08-30 18:59:55,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39088, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=39969, PETRI_PLACES=509, PETRI_TRANSITIONS=803} [2023-08-30 18:59:55,043 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 486 predicate places. [2023-08-30 18:59:55,043 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 803 transitions, 39969 flow [2023-08-30 18:59:55,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 179.22727272727272) internal successors, (3943), 22 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:55,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:59:55,044 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:59:55,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-08-30 18:59:55,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-30 18:59:55,244 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:59:55,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:59:55,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2019952155, now seen corresponding path program 69 times [2023-08-30 18:59:55,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:59:55,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575582390] [2023-08-30 18:59:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:59:55,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:59:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:59:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:55,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:59:55,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575582390] [2023-08-30 18:59:55,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575582390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:59:55,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763685671] [2023-08-30 18:59:55,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:59:55,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:59:55,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:59:55,824 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:59:55,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-30 18:59:56,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 18:59:56,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:59:56,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 18:59:56,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:59:56,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:59:56,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-30 18:59:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:56,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:59:56,662 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:59:56,662 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 71 treesize of output 88 [2023-08-30 18:59:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 18:59:56,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763685671] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:59:56,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:59:56,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2023-08-30 18:59:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933191197] [2023-08-30 18:59:56,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:59:56,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 18:59:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:59:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 18:59:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-08-30 18:59:57,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 18:59:57,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 803 transitions, 39969 flow. Second operand has 25 states, 25 states have (on average 180.84) internal successors, (4521), 25 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:59:57,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:59:57,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 18:59:57,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:01,793 INFO L130 PetriNetUnfolder]: 3875/6833 cut-off events. [2023-08-30 19:00:01,793 INFO L131 PetriNetUnfolder]: For 1263193/1263193 co-relation queries the response was YES. [2023-08-30 19:00:01,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156145 conditions, 6833 events. 3875/6833 cut-off events. For 1263193/1263193 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 49233 event pairs, 648 based on Foata normal form. 36/6869 useless extension candidates. Maximal degree in co-relation 155926. Up to 3579 conditions per place. [2023-08-30 19:00:01,978 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 406 selfloop transitions, 449 changer transitions 3/858 dead transitions. [2023-08-30 19:00:01,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 858 transitions, 42885 flow [2023-08-30 19:00:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:00:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:00:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3136 transitions. [2023-08-30 19:00:01,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37724046673884276 [2023-08-30 19:00:01,982 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3136 transitions. [2023-08-30 19:00:01,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3136 transitions. [2023-08-30 19:00:01,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:01,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3136 transitions. [2023-08-30 19:00:01,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 184.47058823529412) internal successors, (3136), 17 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:01,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:01,990 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:01,990 INFO L175 Difference]: Start difference. First operand has 509 places, 803 transitions, 39969 flow. Second operand 17 states and 3136 transitions. [2023-08-30 19:00:01,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 858 transitions, 42885 flow [2023-08-30 19:00:07,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 858 transitions, 41883 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-08-30 19:00:07,843 INFO L231 Difference]: Finished difference. Result has 518 places, 813 transitions, 40621 flow [2023-08-30 19:00:07,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=38899, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=40621, PETRI_PLACES=518, PETRI_TRANSITIONS=813} [2023-08-30 19:00:07,843 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 495 predicate places. [2023-08-30 19:00:07,843 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 813 transitions, 40621 flow [2023-08-30 19:00:07,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 180.84) internal successors, (4521), 25 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:07,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:07,844 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:07,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:08,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:08,045 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:08,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1845738929, now seen corresponding path program 70 times [2023-08-30 19:00:08,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:08,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094330351] [2023-08-30 19:00:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:08,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:08,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:08,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094330351] [2023-08-30 19:00:08,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094330351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:08,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248859482] [2023-08-30 19:00:08,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:00:08,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:08,539 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:08,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-30 19:00:08,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:00:08,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:08,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 19:00:08,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:08,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:08,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-30 19:00:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:09,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:09,231 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 19:00:09,231 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 [2023-08-30 19:00:09,267 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 19:00:09,267 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 [2023-08-30 19:00:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:09,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248859482] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:09,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:09,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 21 [2023-08-30 19:00:09,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915031979] [2023-08-30 19:00:09,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:09,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:00:09,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:09,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:00:09,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:00:09,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 19:00:09,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 813 transitions, 40621 flow. Second operand has 21 states, 21 states have (on average 181.33333333333334) internal successors, (3808), 21 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:09,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:09,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 19:00:09,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:13,232 INFO L130 PetriNetUnfolder]: 3861/6799 cut-off events. [2023-08-30 19:00:13,232 INFO L131 PetriNetUnfolder]: For 1354995/1354995 co-relation queries the response was YES. [2023-08-30 19:00:13,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158811 conditions, 6799 events. 3861/6799 cut-off events. For 1354995/1354995 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 48879 event pairs, 1470 based on Foata normal form. 12/6811 useless extension candidates. Maximal degree in co-relation 158588. Up to 6147 conditions per place. [2023-08-30 19:00:13,365 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 687 selfloop transitions, 136 changer transitions 0/823 dead transitions. [2023-08-30 19:00:13,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 823 transitions, 42314 flow [2023-08-30 19:00:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:00:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:00:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1842 transitions. [2023-08-30 19:00:13,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37668711656441717 [2023-08-30 19:00:13,367 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1842 transitions. [2023-08-30 19:00:13,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1842 transitions. [2023-08-30 19:00:13,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:13,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1842 transitions. [2023-08-30 19:00:13,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.2) internal successors, (1842), 10 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:13,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:13,371 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:13,371 INFO L175 Difference]: Start difference. First operand has 518 places, 813 transitions, 40621 flow. Second operand 10 states and 1842 transitions. [2023-08-30 19:00:13,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 823 transitions, 42314 flow [2023-08-30 19:00:19,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 823 transitions, 41787 flow, removed 159 selfloop flow, removed 10 redundant places. [2023-08-30 19:00:19,569 INFO L231 Difference]: Finished difference. Result has 515 places, 812 transitions, 40355 flow [2023-08-30 19:00:19,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=40083, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=40355, PETRI_PLACES=515, PETRI_TRANSITIONS=812} [2023-08-30 19:00:19,570 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 492 predicate places. [2023-08-30 19:00:19,570 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 812 transitions, 40355 flow [2023-08-30 19:00:19,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 181.33333333333334) internal successors, (3808), 21 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:19,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:19,571 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:19,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:19,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:19,777 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:19,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash 177218349, now seen corresponding path program 71 times [2023-08-30 19:00:19,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:19,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143100114] [2023-08-30 19:00:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:19,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:20,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:20,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143100114] [2023-08-30 19:00:20,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143100114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:20,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073262570] [2023-08-30 19:00:20,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:00:20,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:20,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:20,211 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:20,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-30 19:00:20,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:00:20,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:20,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 19:00:20,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:20,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:20,674 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 65 treesize of output 45 [2023-08-30 19:00:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:20,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:20,925 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 19:00:20,926 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 [2023-08-30 19:00:20,940 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 19:00:20,940 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 [2023-08-30 19:00:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:20,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073262570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:20,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:20,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-08-30 19:00:20,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898667371] [2023-08-30 19:00:20,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:20,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 19:00:20,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:20,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 19:00:20,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-08-30 19:00:21,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 19:00:21,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 812 transitions, 40355 flow. Second operand has 24 states, 24 states have (on average 182.16666666666666) internal successors, (4372), 24 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:21,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:21,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 19:00:21,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:24,986 INFO L130 PetriNetUnfolder]: 3843/6737 cut-off events. [2023-08-30 19:00:24,986 INFO L131 PetriNetUnfolder]: For 1349451/1349451 co-relation queries the response was YES. [2023-08-30 19:00:25,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157185 conditions, 6737 events. 3843/6737 cut-off events. For 1349451/1349451 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 48089 event pairs, 1452 based on Foata normal form. 4/6741 useless extension candidates. Maximal degree in co-relation 156962. Up to 6085 conditions per place. [2023-08-30 19:00:25,113 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 678 selfloop transitions, 136 changer transitions 2/816 dead transitions. [2023-08-30 19:00:25,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 816 transitions, 41775 flow [2023-08-30 19:00:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:00:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:00:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1666 transitions. [2023-08-30 19:00:25,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3785503294705749 [2023-08-30 19:00:25,115 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1666 transitions. [2023-08-30 19:00:25,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1666 transitions. [2023-08-30 19:00:25,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:25,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1666 transitions. [2023-08-30 19:00:25,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 185.11111111111111) internal successors, (1666), 9 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:25,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:25,118 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:25,118 INFO L175 Difference]: Start difference. First operand has 515 places, 812 transitions, 40355 flow. Second operand 9 states and 1666 transitions. [2023-08-30 19:00:25,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 816 transitions, 41775 flow [2023-08-30 19:00:31,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 816 transitions, 41494 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-30 19:00:31,024 INFO L231 Difference]: Finished difference. Result has 511 places, 808 transitions, 40092 flow [2023-08-30 19:00:31,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39827, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=40092, PETRI_PLACES=511, PETRI_TRANSITIONS=808} [2023-08-30 19:00:31,025 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 488 predicate places. [2023-08-30 19:00:31,025 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 808 transitions, 40092 flow [2023-08-30 19:00:31,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 182.16666666666666) internal successors, (4372), 24 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:31,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:31,025 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:31,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:31,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-08-30 19:00:31,226 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:31,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash 595929495, now seen corresponding path program 72 times [2023-08-30 19:00:31,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:31,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261649606] [2023-08-30 19:00:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:31,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:31,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261649606] [2023-08-30 19:00:31,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261649606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:31,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398162097] [2023-08-30 19:00:31,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:00:31,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:31,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:31,782 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:31,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-30 19:00:32,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 19:00:32,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:32,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:00:32,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:32,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:32,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-08-30 19:00:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:32,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:32,495 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 19:00:32,496 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 71 treesize of output 88 [2023-08-30 19:00:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:32,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398162097] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:32,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:32,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 19:00:32,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175051361] [2023-08-30 19:00:32,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:32,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:00:32,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:00:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:00:33,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 19:00:33,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 808 transitions, 40092 flow. Second operand has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:33,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:33,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 19:00:33,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:36,539 INFO L130 PetriNetUnfolder]: 3839/6735 cut-off events. [2023-08-30 19:00:36,539 INFO L131 PetriNetUnfolder]: For 1341187/1341187 co-relation queries the response was YES. [2023-08-30 19:00:36,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157200 conditions, 6735 events. 3839/6735 cut-off events. For 1341187/1341187 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 48117 event pairs, 1438 based on Foata normal form. 4/6739 useless extension candidates. Maximal degree in co-relation 156978. Up to 6113 conditions per place. [2023-08-30 19:00:36,668 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 680 selfloop transitions, 131 changer transitions 8/819 dead transitions. [2023-08-30 19:00:36,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 819 transitions, 41909 flow [2023-08-30 19:00:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:00:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:00:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1655 transitions. [2023-08-30 19:00:36,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3760508975232902 [2023-08-30 19:00:36,670 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1655 transitions. [2023-08-30 19:00:36,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1655 transitions. [2023-08-30 19:00:36,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:36,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1655 transitions. [2023-08-30 19:00:36,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 183.88888888888889) internal successors, (1655), 9 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:36,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:36,673 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:36,673 INFO L175 Difference]: Start difference. First operand has 511 places, 808 transitions, 40092 flow. Second operand 9 states and 1655 transitions. [2023-08-30 19:00:36,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 819 transitions, 41909 flow [2023-08-30 19:00:42,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 819 transitions, 41633 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 19:00:42,483 INFO L231 Difference]: Finished difference. Result has 511 places, 804 transitions, 39878 flow [2023-08-30 19:00:42,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39820, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=39878, PETRI_PLACES=511, PETRI_TRANSITIONS=804} [2023-08-30 19:00:42,484 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 488 predicate places. [2023-08-30 19:00:42,484 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 804 transitions, 39878 flow [2023-08-30 19:00:42,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:42,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:42,485 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:42,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-08-30 19:00:42,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:42,692 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:42,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:42,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1818498919, now seen corresponding path program 73 times [2023-08-30 19:00:42,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:42,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566865113] [2023-08-30 19:00:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:42,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:43,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:43,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566865113] [2023-08-30 19:00:43,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566865113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:43,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82454851] [2023-08-30 19:00:43,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:00:43,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:43,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:43,235 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:43,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-30 19:00:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:43,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:00:43,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:43,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:43,896 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 19:00:43,897 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 71 treesize of output 88 [2023-08-30 19:00:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:43,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82454851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:43,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:43,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-30 19:00:43,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368077577] [2023-08-30 19:00:43,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:43,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:00:43,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:43,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:00:43,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:00:44,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 19:00:44,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 804 transitions, 39878 flow. Second operand has 21 states, 21 states have (on average 182.0952380952381) internal successors, (3824), 21 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:44,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:44,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 19:00:44,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:47,944 INFO L130 PetriNetUnfolder]: 3817/6659 cut-off events. [2023-08-30 19:00:47,944 INFO L131 PetriNetUnfolder]: For 1341799/1341799 co-relation queries the response was YES. [2023-08-30 19:00:48,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155757 conditions, 6659 events. 3817/6659 cut-off events. For 1341799/1341799 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 47195 event pairs, 1430 based on Foata normal form. 4/6663 useless extension candidates. Maximal degree in co-relation 155534. Up to 6045 conditions per place. [2023-08-30 19:00:48,074 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 677 selfloop transitions, 128 changer transitions 6/811 dead transitions. [2023-08-30 19:00:48,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 811 transitions, 41455 flow [2023-08-30 19:00:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:00:48,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:00:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1665 transitions. [2023-08-30 19:00:48,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783231083844581 [2023-08-30 19:00:48,076 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1665 transitions. [2023-08-30 19:00:48,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1665 transitions. [2023-08-30 19:00:48,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:48,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1665 transitions. [2023-08-30 19:00:48,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:48,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:48,079 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:48,079 INFO L175 Difference]: Start difference. First operand has 511 places, 804 transitions, 39878 flow. Second operand 9 states and 1665 transitions. [2023-08-30 19:00:48,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 811 transitions, 41455 flow [2023-08-30 19:00:54,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 811 transitions, 41175 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-08-30 19:00:54,085 INFO L231 Difference]: Finished difference. Result has 511 places, 799 transitions, 39628 flow [2023-08-30 19:00:54,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39513, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=39628, PETRI_PLACES=511, PETRI_TRANSITIONS=799} [2023-08-30 19:00:54,086 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 488 predicate places. [2023-08-30 19:00:54,086 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 799 transitions, 39628 flow [2023-08-30 19:00:54,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.0952380952381) internal successors, (3824), 21 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:54,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:00:54,086 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:00:54,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-08-30 19:00:54,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:54,287 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:00:54,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:00:54,287 INFO L85 PathProgramCache]: Analyzing trace with hash -368832405, now seen corresponding path program 74 times [2023-08-30 19:00:54,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:00:54,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796828987] [2023-08-30 19:00:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:00:54,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:00:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:00:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:54,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:00:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796828987] [2023-08-30 19:00:54,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796828987] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:00:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459899792] [2023-08-30 19:00:54,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:00:54,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:00:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:00:54,819 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:00:54,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-30 19:00:55,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:00:55,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:00:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 19:00:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:00:55,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:00:55,296 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 [2023-08-30 19:00:55,439 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 19:00:55,439 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 25 treesize of output 9 [2023-08-30 19:00:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:55,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:00:55,579 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5570 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_5570))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))) (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset)))))) is different from false [2023-08-30 19:00:55,623 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-30 19:00:55,623 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 114 treesize of output 127 [2023-08-30 19:00:55,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:00:55,640 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 74 treesize of output 88 [2023-08-30 19:00:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:00:55,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459899792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:00:55,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:00:55,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 28 [2023-08-30 19:00:55,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60186680] [2023-08-30 19:00:55,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:00:55,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 19:00:55,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:00:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 19:00:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=645, Unknown=1, NotChecked=52, Total=812 [2023-08-30 19:00:56,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-30 19:00:56,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 799 transitions, 39628 flow. Second operand has 29 states, 29 states have (on average 160.9655172413793) internal successors, (4668), 29 states have internal predecessors, (4668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:56,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:00:56,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-30 19:00:56,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:00:59,807 INFO L130 PetriNetUnfolder]: 4183/7287 cut-off events. [2023-08-30 19:00:59,807 INFO L131 PetriNetUnfolder]: For 1427011/1427011 co-relation queries the response was YES. [2023-08-30 19:00:59,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169963 conditions, 7287 events. 4183/7287 cut-off events. For 1427011/1427011 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 52290 event pairs, 280 based on Foata normal form. 28/7315 useless extension candidates. Maximal degree in co-relation 169740. Up to 2806 conditions per place. [2023-08-30 19:00:59,945 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 548 selfloop transitions, 376 changer transitions 3/927 dead transitions. [2023-08-30 19:00:59,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 927 transitions, 46651 flow [2023-08-30 19:00:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 19:00:59,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 19:00:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2310 transitions. [2023-08-30 19:00:59,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374233128834356 [2023-08-30 19:00:59,947 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2310 transitions. [2023-08-30 19:00:59,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2310 transitions. [2023-08-30 19:00:59,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:00:59,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2310 transitions. [2023-08-30 19:00:59,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:59,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:59,951 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:00:59,952 INFO L175 Difference]: Start difference. First operand has 511 places, 799 transitions, 39628 flow. Second operand 14 states and 2310 transitions. [2023-08-30 19:00:59,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 927 transitions, 46651 flow [2023-08-30 19:01:06,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 927 transitions, 46386 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-30 19:01:06,415 INFO L231 Difference]: Finished difference. Result has 519 places, 832 transitions, 42473 flow [2023-08-30 19:01:06,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39363, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=42473, PETRI_PLACES=519, PETRI_TRANSITIONS=832} [2023-08-30 19:01:06,415 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 496 predicate places. [2023-08-30 19:01:06,415 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 832 transitions, 42473 flow [2023-08-30 19:01:06,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 160.9655172413793) internal successors, (4668), 29 states have internal predecessors, (4668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:06,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:06,416 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:06,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:06,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:06,617 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:06,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:06,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1525644689, now seen corresponding path program 75 times [2023-08-30 19:01:06,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:06,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441722096] [2023-08-30 19:01:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:06,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:07,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:07,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441722096] [2023-08-30 19:01:07,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441722096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:07,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608855987] [2023-08-30 19:01:07,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:01:07,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:07,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:07,147 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:07,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-08-30 19:01:07,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:01:07,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:07,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:01:07,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:07,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:07,646 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 59 treesize of output 35 [2023-08-30 19:01:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:07,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:07,876 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 19:01:07,877 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 71 treesize of output 88 [2023-08-30 19:01:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:07,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608855987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:07,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:07,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 19:01:07,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696527613] [2023-08-30 19:01:07,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:07,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:01:07,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:07,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:01:07,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:01:08,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 19:01:08,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 832 transitions, 42473 flow. Second operand has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:08,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:08,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 19:01:08,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:13,271 INFO L130 PetriNetUnfolder]: 4265/7477 cut-off events. [2023-08-30 19:01:13,271 INFO L131 PetriNetUnfolder]: For 1627498/1627498 co-relation queries the response was YES. [2023-08-30 19:01:13,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178706 conditions, 7477 events. 4265/7477 cut-off events. For 1627498/1627498 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 54356 event pairs, 1568 based on Foata normal form. 16/7493 useless extension candidates. Maximal degree in co-relation 178474. Up to 6747 conditions per place. [2023-08-30 19:01:13,411 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 771 selfloop transitions, 123 changer transitions 1/895 dead transitions. [2023-08-30 19:01:13,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 895 transitions, 45802 flow [2023-08-30 19:01:13,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 19:01:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 19:01:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3519 transitions. [2023-08-30 19:01:13,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37875363254762673 [2023-08-30 19:01:13,414 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3519 transitions. [2023-08-30 19:01:13,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3519 transitions. [2023-08-30 19:01:13,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:13,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3519 transitions. [2023-08-30 19:01:13,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 185.21052631578948) internal successors, (3519), 19 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:13,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:13,420 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:13,420 INFO L175 Difference]: Start difference. First operand has 519 places, 832 transitions, 42473 flow. Second operand 19 states and 3519 transitions. [2023-08-30 19:01:13,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 895 transitions, 45802 flow [2023-08-30 19:01:21,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 895 transitions, 45412 flow, removed 110 selfloop flow, removed 6 redundant places. [2023-08-30 19:01:21,149 INFO L231 Difference]: Finished difference. Result has 531 places, 850 transitions, 43669 flow [2023-08-30 19:01:21,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=42083, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=43669, PETRI_PLACES=531, PETRI_TRANSITIONS=850} [2023-08-30 19:01:21,150 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 508 predicate places. [2023-08-30 19:01:21,150 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 850 transitions, 43669 flow [2023-08-30 19:01:21,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:21,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:21,151 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:21,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:21,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2023-08-30 19:01:21,351 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:21,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash -929520301, now seen corresponding path program 76 times [2023-08-30 19:01:21,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:21,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794246620] [2023-08-30 19:01:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:21,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:21,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:21,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794246620] [2023-08-30 19:01:21,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794246620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:21,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199330821] [2023-08-30 19:01:21,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:01:21,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:21,918 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:21,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-08-30 19:01:22,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:01:22,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:22,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 19:01:22,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:22,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:01:22,426 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 [2023-08-30 19:01:22,615 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 19:01:22,615 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 25 treesize of output 9 [2023-08-30 19:01:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:22,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:22,785 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5711 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_5711))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))))))) is different from false [2023-08-30 19:01:22,829 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-30 19:01:22,829 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 114 treesize of output 127 [2023-08-30 19:01:22,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:22,845 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 74 treesize of output 88 [2023-08-30 19:01:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:23,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199330821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:23,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:23,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 29 [2023-08-30 19:01:23,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693769136] [2023-08-30 19:01:23,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:23,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 19:01:23,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 19:01:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=702, Unknown=1, NotChecked=54, Total=870 [2023-08-30 19:01:23,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-08-30 19:01:23,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 850 transitions, 43669 flow. Second operand has 30 states, 30 states have (on average 160.8) internal successors, (4824), 30 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:23,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:23,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-08-30 19:01:23,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:27,852 INFO L130 PetriNetUnfolder]: 4385/7685 cut-off events. [2023-08-30 19:01:27,853 INFO L131 PetriNetUnfolder]: For 1681767/1681767 co-relation queries the response was YES. [2023-08-30 19:01:27,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184241 conditions, 7685 events. 4385/7685 cut-off events. For 1681767/1681767 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 56023 event pairs, 813 based on Foata normal form. 40/7725 useless extension candidates. Maximal degree in co-relation 184012. Up to 3771 conditions per place. [2023-08-30 19:01:28,008 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 606 selfloop transitions, 317 changer transitions 2/925 dead transitions. [2023-08-30 19:01:28,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 925 transitions, 48080 flow [2023-08-30 19:01:28,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 19:01:28,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 19:01:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2472 transitions. [2023-08-30 19:01:28,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3370143149284254 [2023-08-30 19:01:28,011 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2472 transitions. [2023-08-30 19:01:28,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2472 transitions. [2023-08-30 19:01:28,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:28,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2472 transitions. [2023-08-30 19:01:28,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 164.8) internal successors, (2472), 15 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:28,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:28,016 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:28,016 INFO L175 Difference]: Start difference. First operand has 531 places, 850 transitions, 43669 flow. Second operand 15 states and 2472 transitions. [2023-08-30 19:01:28,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 925 transitions, 48080 flow [2023-08-30 19:01:36,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 925 transitions, 47271 flow, removed 337 selfloop flow, removed 8 redundant places. [2023-08-30 19:01:36,110 INFO L231 Difference]: Finished difference. Result has 545 places, 871 transitions, 44970 flow [2023-08-30 19:01:36,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=42865, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=44970, PETRI_PLACES=545, PETRI_TRANSITIONS=871} [2023-08-30 19:01:36,110 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 522 predicate places. [2023-08-30 19:01:36,111 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 871 transitions, 44970 flow [2023-08-30 19:01:36,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 160.8) internal successors, (4824), 30 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:36,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:36,111 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:36,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:36,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:36,312 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:36,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:36,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2059290629, now seen corresponding path program 77 times [2023-08-30 19:01:36,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:36,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048221829] [2023-08-30 19:01:36,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:36,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:36,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:36,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048221829] [2023-08-30 19:01:36,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048221829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:36,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676511461] [2023-08-30 19:01:36,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:01:36,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:36,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:36,822 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:36,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-08-30 19:01:37,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:01:37,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:37,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:01:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:37,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:37,382 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 59 treesize of output 35 [2023-08-30 19:01:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:37,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:37,683 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-30 19:01:37,683 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 63 treesize of output 67 [2023-08-30 19:01:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:37,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676511461] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:37,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:37,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-08-30 19:01:37,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495160255] [2023-08-30 19:01:37,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:37,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:01:37,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:37,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:01:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:01:38,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 19:01:38,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 871 transitions, 44970 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:38,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:38,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 19:01:38,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:42,495 INFO L130 PetriNetUnfolder]: 4409/7745 cut-off events. [2023-08-30 19:01:42,495 INFO L131 PetriNetUnfolder]: For 1804674/1804674 co-relation queries the response was YES. [2023-08-30 19:01:42,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188299 conditions, 7745 events. 4409/7745 cut-off events. For 1804674/1804674 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 56924 event pairs, 1169 based on Foata normal form. 20/7765 useless extension candidates. Maximal degree in co-relation 188058. Up to 5105 conditions per place. [2023-08-30 19:01:42,647 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 593 selfloop transitions, 312 changer transitions 0/905 dead transitions. [2023-08-30 19:01:42,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 905 transitions, 47541 flow [2023-08-30 19:01:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:01:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:01:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1865 transitions. [2023-08-30 19:01:42,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38139059304703476 [2023-08-30 19:01:42,649 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1865 transitions. [2023-08-30 19:01:42,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1865 transitions. [2023-08-30 19:01:42,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:42,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1865 transitions. [2023-08-30 19:01:42,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 186.5) internal successors, (1865), 10 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:42,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:42,653 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:42,653 INFO L175 Difference]: Start difference. First operand has 545 places, 871 transitions, 44970 flow. Second operand 10 states and 1865 transitions. [2023-08-30 19:01:42,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 905 transitions, 47541 flow [2023-08-30 19:01:51,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 905 transitions, 46971 flow, removed 196 selfloop flow, removed 8 redundant places. [2023-08-30 19:01:51,544 INFO L231 Difference]: Finished difference. Result has 548 places, 875 transitions, 45311 flow [2023-08-30 19:01:51,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44412, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=45311, PETRI_PLACES=548, PETRI_TRANSITIONS=875} [2023-08-30 19:01:51,545 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 525 predicate places. [2023-08-30 19:01:51,545 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 875 transitions, 45311 flow [2023-08-30 19:01:51,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:51,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:01:51,545 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:01:51,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-08-30 19:01:51,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:51,746 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:01:51,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:01:51,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1359952089, now seen corresponding path program 78 times [2023-08-30 19:01:51,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:01:51,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978884261] [2023-08-30 19:01:51,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:01:51,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:01:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:01:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:52,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:01:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978884261] [2023-08-30 19:01:52,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978884261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:01:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475629202] [2023-08-30 19:01:52,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:01:52,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:01:52,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:01:52,316 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:01:52,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-08-30 19:01:52,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 19:01:52,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:01:52,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 19:01:52,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:01:52,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:01:52,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-30 19:01:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:52,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:01:53,104 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 19:01:53,104 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 71 treesize of output 88 [2023-08-30 19:01:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:01:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475629202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:01:53,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:01:53,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 22 [2023-08-30 19:01:53,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786922761] [2023-08-30 19:01:53,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:01:53,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:01:53,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:01:53,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:01:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:01:53,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 19:01:53,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 875 transitions, 45311 flow. Second operand has 22 states, 22 states have (on average 181.13636363636363) internal successors, (3985), 22 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:53,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:01:53,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 19:01:53,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:01:58,300 INFO L130 PetriNetUnfolder]: 4361/7617 cut-off events. [2023-08-30 19:01:58,300 INFO L131 PetriNetUnfolder]: For 1727930/1727930 co-relation queries the response was YES. [2023-08-30 19:01:58,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186731 conditions, 7617 events. 4361/7617 cut-off events. For 1727930/1727930 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 55462 event pairs, 1620 based on Foata normal form. 36/7653 useless extension candidates. Maximal degree in co-relation 186492. Up to 6999 conditions per place. [2023-08-30 19:01:58,552 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 766 selfloop transitions, 116 changer transitions 0/882 dead transitions. [2023-08-30 19:01:58,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 882 transitions, 46872 flow [2023-08-30 19:01:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:01:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:01:58,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1845 transitions. [2023-08-30 19:01:58,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3773006134969325 [2023-08-30 19:01:58,554 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1845 transitions. [2023-08-30 19:01:58,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1845 transitions. [2023-08-30 19:01:58,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:01:58,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1845 transitions. [2023-08-30 19:01:58,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.5) internal successors, (1845), 10 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:58,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:58,557 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:01:58,557 INFO L175 Difference]: Start difference. First operand has 548 places, 875 transitions, 45311 flow. Second operand 10 states and 1845 transitions. [2023-08-30 19:01:58,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 882 transitions, 46872 flow [2023-08-30 19:02:07,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 882 transitions, 46383 flow, removed 66 selfloop flow, removed 7 redundant places. [2023-08-30 19:02:07,139 INFO L231 Difference]: Finished difference. Result has 544 places, 867 transitions, 44774 flow [2023-08-30 19:02:07,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44542, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=44774, PETRI_PLACES=544, PETRI_TRANSITIONS=867} [2023-08-30 19:02:07,140 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 521 predicate places. [2023-08-30 19:02:07,140 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 867 transitions, 44774 flow [2023-08-30 19:02:07,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 181.13636363636363) internal successors, (3985), 22 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:07,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:07,141 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:07,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:07,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2023-08-30 19:02:07,345 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:07,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:07,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1471225305, now seen corresponding path program 79 times [2023-08-30 19:02:07,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:07,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191166633] [2023-08-30 19:02:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:07,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:07,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:07,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191166633] [2023-08-30 19:02:07,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191166633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:07,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090865618] [2023-08-30 19:02:07,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:02:07,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:07,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:07,847 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:07,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-08-30 19:02:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:08,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:02:08,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:08,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:08,321 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 46 treesize of output 30 [2023-08-30 19:02:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:08,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:08,536 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 19:02:08,536 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 [2023-08-30 19:02:08,569 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 19:02:08,569 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 [2023-08-30 19:02:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:08,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090865618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:08,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:08,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-08-30 19:02:08,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951222472] [2023-08-30 19:02:08,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:08,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:02:08,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:08,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:02:08,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:02:09,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 19:02:09,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 867 transitions, 44774 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:09,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:09,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 19:02:09,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:13,301 INFO L130 PetriNetUnfolder]: 4385/7677 cut-off events. [2023-08-30 19:02:13,301 INFO L131 PetriNetUnfolder]: For 1743374/1743374 co-relation queries the response was YES. [2023-08-30 19:02:13,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187389 conditions, 7677 events. 4385/7677 cut-off events. For 1743374/1743374 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 56146 event pairs, 1630 based on Foata normal form. 20/7697 useless extension candidates. Maximal degree in co-relation 187150. Up to 7043 conditions per place. [2023-08-30 19:02:13,451 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 783 selfloop transitions, 106 changer transitions 1/890 dead transitions. [2023-08-30 19:02:13,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 890 transitions, 47068 flow [2023-08-30 19:02:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:02:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:02:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1856 transitions. [2023-08-30 19:02:13,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37955010224948876 [2023-08-30 19:02:13,453 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1856 transitions. [2023-08-30 19:02:13,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1856 transitions. [2023-08-30 19:02:13,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:13,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1856 transitions. [2023-08-30 19:02:13,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 185.6) internal successors, (1856), 10 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:13,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:13,456 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:13,456 INFO L175 Difference]: Start difference. First operand has 544 places, 867 transitions, 44774 flow. Second operand 10 states and 1856 transitions. [2023-08-30 19:02:13,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 890 transitions, 47068 flow [2023-08-30 19:02:22,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 890 transitions, 46840 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 19:02:22,322 INFO L231 Difference]: Finished difference. Result has 547 places, 871 transitions, 45047 flow [2023-08-30 19:02:22,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44546, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=45047, PETRI_PLACES=547, PETRI_TRANSITIONS=871} [2023-08-30 19:02:22,323 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 524 predicate places. [2023-08-30 19:02:22,323 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 871 transitions, 45047 flow [2023-08-30 19:02:22,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:22,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:22,324 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:22,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:22,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:22,524 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:22,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:22,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1216899597, now seen corresponding path program 80 times [2023-08-30 19:02:22,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:22,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716225433] [2023-08-30 19:02:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:22,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:22,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:22,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716225433] [2023-08-30 19:02:22,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716225433] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:22,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822842831] [2023-08-30 19:02:22,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:02:22,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:22,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:22,939 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:22,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-08-30 19:02:23,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:02:23,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:23,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 19:02:23,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:23,440 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 19:02:23,440 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 55 treesize of output 23 [2023-08-30 19:02:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:23,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:23,564 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 19:02:23,564 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 [2023-08-30 19:02:23,597 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 19:02:23,598 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 [2023-08-30 19:02:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:23,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822842831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:23,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:23,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-30 19:02:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072764458] [2023-08-30 19:02:23,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:23,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 19:02:23,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 19:02:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-08-30 19:02:24,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-08-30 19:02:24,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 871 transitions, 45047 flow. Second operand has 19 states, 19 states have (on average 183.21052631578948) internal successors, (3481), 19 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:24,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:24,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-08-30 19:02:24,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:28,060 INFO L130 PetriNetUnfolder]: 4395/7695 cut-off events. [2023-08-30 19:02:28,060 INFO L131 PetriNetUnfolder]: For 1779193/1779193 co-relation queries the response was YES. [2023-08-30 19:02:28,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188489 conditions, 7695 events. 4395/7695 cut-off events. For 1779193/1779193 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 56257 event pairs, 1650 based on Foata normal form. 24/7719 useless extension candidates. Maximal degree in co-relation 188248. Up to 7117 conditions per place. [2023-08-30 19:02:28,222 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 799 selfloop transitions, 100 changer transitions 0/899 dead transitions. [2023-08-30 19:02:28,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 899 transitions, 47652 flow [2023-08-30 19:02:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 19:02:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 19:02:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1865 transitions. [2023-08-30 19:02:28,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38139059304703476 [2023-08-30 19:02:28,224 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1865 transitions. [2023-08-30 19:02:28,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1865 transitions. [2023-08-30 19:02:28,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:28,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1865 transitions. [2023-08-30 19:02:28,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 186.5) internal successors, (1865), 10 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:28,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:28,227 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:28,228 INFO L175 Difference]: Start difference. First operand has 547 places, 871 transitions, 45047 flow. Second operand 10 states and 1865 transitions. [2023-08-30 19:02:28,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 899 transitions, 47652 flow [2023-08-30 19:02:37,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 899 transitions, 47329 flow, removed 62 selfloop flow, removed 7 redundant places. [2023-08-30 19:02:37,651 INFO L231 Difference]: Finished difference. Result has 550 places, 877 transitions, 45323 flow [2023-08-30 19:02:37,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44724, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=45323, PETRI_PLACES=550, PETRI_TRANSITIONS=877} [2023-08-30 19:02:37,652 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 527 predicate places. [2023-08-30 19:02:37,652 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 877 transitions, 45323 flow [2023-08-30 19:02:37,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 183.21052631578948) internal successors, (3481), 19 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:37,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:37,652 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:37,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:37,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:37,857 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:37,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:37,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2102567933, now seen corresponding path program 81 times [2023-08-30 19:02:37,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:37,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51360538] [2023-08-30 19:02:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:38,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:38,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51360538] [2023-08-30 19:02:38,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51360538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:38,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452068179] [2023-08-30 19:02:38,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:02:38,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:38,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:38,408 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:38,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-08-30 19:02:38,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:02:38,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:02:38,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:38,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:02:38,922 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 59 treesize of output 35 [2023-08-30 19:02:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:38,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:39,164 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-30 19:02:39,165 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 63 treesize of output 67 [2023-08-30 19:02:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:39,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452068179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:39,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:39,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 19:02:39,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963703943] [2023-08-30 19:02:39,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:39,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:02:39,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:02:39,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:02:40,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 19:02:40,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 877 transitions, 45323 flow. Second operand has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:40,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:40,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 19:02:40,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:02:44,579 INFO L130 PetriNetUnfolder]: 4393/7697 cut-off events. [2023-08-30 19:02:44,579 INFO L131 PetriNetUnfolder]: For 1792976/1792976 co-relation queries the response was YES. [2023-08-30 19:02:44,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189064 conditions, 7697 events. 4393/7697 cut-off events. For 1792976/1792976 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 56408 event pairs, 1150 based on Foata normal form. 4/7701 useless extension candidates. Maximal degree in co-relation 188822. Up to 5137 conditions per place. [2023-08-30 19:02:44,746 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 583 selfloop transitions, 324 changer transitions 2/909 dead transitions. [2023-08-30 19:02:44,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 909 transitions, 47652 flow [2023-08-30 19:02:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 19:02:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 19:02:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2227 transitions. [2023-08-30 19:02:44,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37951601908657123 [2023-08-30 19:02:44,748 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2227 transitions. [2023-08-30 19:02:44,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2227 transitions. [2023-08-30 19:02:44,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:02:44,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2227 transitions. [2023-08-30 19:02:44,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 185.58333333333334) internal successors, (2227), 12 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:44,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:44,752 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:44,752 INFO L175 Difference]: Start difference. First operand has 550 places, 877 transitions, 45323 flow. Second operand 12 states and 2227 transitions. [2023-08-30 19:02:44,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 909 transitions, 47652 flow [2023-08-30 19:02:53,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 909 transitions, 47249 flow, removed 82 selfloop flow, removed 9 redundant places. [2023-08-30 19:02:53,961 INFO L231 Difference]: Finished difference. Result has 555 places, 879 transitions, 45756 flow [2023-08-30 19:02:53,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44920, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=45756, PETRI_PLACES=555, PETRI_TRANSITIONS=879} [2023-08-30 19:02:53,962 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 532 predicate places. [2023-08-30 19:02:53,962 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 879 transitions, 45756 flow [2023-08-30 19:02:53,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:53,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:02:53,963 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:02:53,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-08-30 19:02:54,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-08-30 19:02:54,164 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:02:54,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:02:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash -995829491, now seen corresponding path program 82 times [2023-08-30 19:02:54,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:02:54,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263715297] [2023-08-30 19:02:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:02:54,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:02:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:02:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:54,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:02:54,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263715297] [2023-08-30 19:02:54,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263715297] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:02:54,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121279267] [2023-08-30 19:02:54,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 19:02:54,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:02:54,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:02:54,724 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:02:54,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-08-30 19:02:55,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 19:02:55,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:02:55,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 19:02:55,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:02:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:55,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:02:55,390 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-30 19:02:55,390 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 63 treesize of output 67 [2023-08-30 19:02:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:02:55,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121279267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:02:55,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:02:55,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-30 19:02:55,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297956543] [2023-08-30 19:02:55,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:02:55,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:02:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:02:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:02:55,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:02:56,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 19:02:56,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 879 transitions, 45756 flow. Second operand has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:02:56,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:02:56,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 19:02:56,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:03:00,264 INFO L130 PetriNetUnfolder]: 4393/7707 cut-off events. [2023-08-30 19:03:00,264 INFO L131 PetriNetUnfolder]: For 1851700/1851700 co-relation queries the response was YES. [2023-08-30 19:03:00,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190565 conditions, 7707 events. 4393/7707 cut-off events. For 1851700/1851700 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 56739 event pairs, 1080 based on Foata normal form. 4/7711 useless extension candidates. Maximal degree in co-relation 190320. Up to 5137 conditions per place. [2023-08-30 19:03:00,506 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 610 selfloop transitions, 325 changer transitions 11/946 dead transitions. [2023-08-30 19:03:00,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 946 transitions, 51095 flow [2023-08-30 19:03:00,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:03:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:03:00,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1663 transitions. [2023-08-30 19:03:00,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778686662122245 [2023-08-30 19:03:00,509 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1663 transitions. [2023-08-30 19:03:00,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1663 transitions. [2023-08-30 19:03:00,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:03:00,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1663 transitions. [2023-08-30 19:03:00,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:00,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:00,513 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:00,513 INFO L175 Difference]: Start difference. First operand has 555 places, 879 transitions, 45756 flow. Second operand 9 states and 1663 transitions. [2023-08-30 19:03:00,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 946 transitions, 51095 flow [2023-08-30 19:03:09,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 946 transitions, 50323 flow, removed 48 selfloop flow, removed 9 redundant places. [2023-08-30 19:03:09,222 INFO L231 Difference]: Finished difference. Result has 558 places, 882 transitions, 46130 flow [2023-08-30 19:03:09,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=45028, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=46130, PETRI_PLACES=558, PETRI_TRANSITIONS=882} [2023-08-30 19:03:09,223 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 535 predicate places. [2023-08-30 19:03:09,223 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 882 transitions, 46130 flow [2023-08-30 19:03:09,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:09,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:03:09,223 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:03:09,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-08-30 19:03:09,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:09,424 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:03:09,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:03:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash 548641225, now seen corresponding path program 83 times [2023-08-30 19:03:09,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:03:09,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326102893] [2023-08-30 19:03:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:03:09,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:03:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:03:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:09,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:03:09,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326102893] [2023-08-30 19:03:09,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326102893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:03:09,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88548218] [2023-08-30 19:03:09,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 19:03:09,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:09,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:03:09,877 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:03:09,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-08-30 19:03:10,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 19:03:10,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:03:10,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:03:10,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:03:10,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:03:10,407 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 46 treesize of output 30 [2023-08-30 19:03:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:10,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:03:10,643 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 19:03:10,644 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 20 treesize of output 4 [2023-08-30 19:03:10,676 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 19:03:10,677 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 [2023-08-30 19:03:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:10,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88548218] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:03:10,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:03:10,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-08-30 19:03:10,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970083557] [2023-08-30 19:03:10,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:03:10,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:03:10,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:03:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:03:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:03:11,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 19:03:11,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 882 transitions, 46130 flow. Second operand has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:11,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:03:11,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 19:03:11,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:03:15,867 INFO L130 PetriNetUnfolder]: 4373/7693 cut-off events. [2023-08-30 19:03:15,867 INFO L131 PetriNetUnfolder]: For 1847709/1847709 co-relation queries the response was YES. [2023-08-30 19:03:16,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191226 conditions, 7693 events. 4373/7693 cut-off events. For 1847709/1847709 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 56587 event pairs, 1614 based on Foata normal form. 20/7713 useless extension candidates. Maximal degree in co-relation 190976. Up to 7057 conditions per place. [2023-08-30 19:03:16,140 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 807 selfloop transitions, 108 changer transitions 0/915 dead transitions. [2023-08-30 19:03:16,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 915 transitions, 48855 flow [2023-08-30 19:03:16,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 19:03:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 19:03:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2409 transitions. [2023-08-30 19:03:16,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37895233600755074 [2023-08-30 19:03:16,142 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2409 transitions. [2023-08-30 19:03:16,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2409 transitions. [2023-08-30 19:03:16,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:03:16,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2409 transitions. [2023-08-30 19:03:16,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.30769230769232) internal successors, (2409), 13 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:16,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:16,146 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:16,146 INFO L175 Difference]: Start difference. First operand has 558 places, 882 transitions, 46130 flow. Second operand 13 states and 2409 transitions. [2023-08-30 19:03:16,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 915 transitions, 48855 flow [2023-08-30 19:03:27,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 915 transitions, 48172 flow, removed 166 selfloop flow, removed 7 redundant places. [2023-08-30 19:03:27,827 INFO L231 Difference]: Finished difference. Result has 564 places, 888 transitions, 46221 flow [2023-08-30 19:03:27,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=45475, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=46221, PETRI_PLACES=564, PETRI_TRANSITIONS=888} [2023-08-30 19:03:27,828 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 541 predicate places. [2023-08-30 19:03:27,828 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 888 transitions, 46221 flow [2023-08-30 19:03:27,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:27,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:03:27,828 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:03:27,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-08-30 19:03:28,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:28,029 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:03:28,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:03:28,029 INFO L85 PathProgramCache]: Analyzing trace with hash -30278077, now seen corresponding path program 84 times [2023-08-30 19:03:28,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:03:28,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671499675] [2023-08-30 19:03:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:03:28,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:03:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:03:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:28,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:03:28,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671499675] [2023-08-30 19:03:28,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671499675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:03:28,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606945462] [2023-08-30 19:03:28,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 19:03:28,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:28,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:03:28,536 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:03:28,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-08-30 19:03:29,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 19:03:29,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:03:29,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 19:03:29,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:03:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:29,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:03:29,446 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 19:03:29,447 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 20 treesize of output 4 [2023-08-30 19:03:29,482 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 19:03:29,482 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 [2023-08-30 19:03:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:29,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606945462] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:03:29,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:03:29,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 19:03:29,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685334625] [2023-08-30 19:03:29,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:03:29,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:03:29,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:03:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:03:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:03:30,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 19:03:30,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 888 transitions, 46221 flow. Second operand has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:30,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:03:30,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 19:03:30,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:03:34,438 INFO L130 PetriNetUnfolder]: 4367/7683 cut-off events. [2023-08-30 19:03:34,438 INFO L131 PetriNetUnfolder]: For 1263314/1263314 co-relation queries the response was YES. [2023-08-30 19:03:34,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172987 conditions, 7683 events. 4367/7683 cut-off events. For 1263314/1263314 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 56533 event pairs, 1632 based on Foata normal form. 4/7687 useless extension candidates. Maximal degree in co-relation 172736. Up to 7139 conditions per place. [2023-08-30 19:03:34,596 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 800 selfloop transitions, 93 changer transitions 6/899 dead transitions. [2023-08-30 19:03:34,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 899 transitions, 48077 flow [2023-08-30 19:03:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:03:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:03:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1653 transitions. [2023-08-30 19:03:34,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37559645535105657 [2023-08-30 19:03:34,598 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1653 transitions. [2023-08-30 19:03:34,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1653 transitions. [2023-08-30 19:03:34,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:03:34,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1653 transitions. [2023-08-30 19:03:34,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 183.66666666666666) internal successors, (1653), 9 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:34,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:34,601 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:34,601 INFO L175 Difference]: Start difference. First operand has 564 places, 888 transitions, 46221 flow. Second operand 9 states and 1653 transitions. [2023-08-30 19:03:34,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 899 transitions, 48077 flow [2023-08-30 19:03:41,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 899 transitions, 47603 flow, removed 140 selfloop flow, removed 7 redundant places. [2023-08-30 19:03:41,503 INFO L231 Difference]: Finished difference. Result has 566 places, 885 transitions, 45794 flow [2023-08-30 19:03:41,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=45747, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=45794, PETRI_PLACES=566, PETRI_TRANSITIONS=885} [2023-08-30 19:03:41,504 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 543 predicate places. [2023-08-30 19:03:41,504 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 885 transitions, 45794 flow [2023-08-30 19:03:41,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:41,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:03:41,505 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:03:41,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2023-08-30 19:03:41,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:41,705 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:03:41,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:03:41,705 INFO L85 PathProgramCache]: Analyzing trace with hash -602948027, now seen corresponding path program 85 times [2023-08-30 19:03:41,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:03:41,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8698292] [2023-08-30 19:03:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:03:41,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:03:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:03:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:42,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:03:42,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8698292] [2023-08-30 19:03:42,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8698292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:03:42,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460177989] [2023-08-30 19:03:42,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 19:03:42,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:42,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:03:42,251 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:03:42,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-08-30 19:03:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:03:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:03:42,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:03:42,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:03:42,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-08-30 19:03:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:42,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:03:43,032 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-30 19:03:43,032 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 63 treesize of output 67 [2023-08-30 19:03:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:43,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460177989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:03:43,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:03:43,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-30 19:03:43,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009598371] [2023-08-30 19:03:43,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:03:43,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 19:03:43,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:03:43,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 19:03:43,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-08-30 19:03:43,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-08-30 19:03:43,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 885 transitions, 45794 flow. Second operand has 20 states, 20 states have (on average 181.1) internal successors, (3622), 20 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:43,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:03:43,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-08-30 19:03:43,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:03:48,033 INFO L130 PetriNetUnfolder]: 4359/7669 cut-off events. [2023-08-30 19:03:48,034 INFO L131 PetriNetUnfolder]: For 1258433/1258433 co-relation queries the response was YES. [2023-08-30 19:03:48,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172312 conditions, 7669 events. 4359/7669 cut-off events. For 1258433/1258433 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 56462 event pairs, 1128 based on Foata normal form. 4/7673 useless extension candidates. Maximal degree in co-relation 172060. Up to 5137 conditions per place. [2023-08-30 19:03:48,185 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 578 selfloop transitions, 324 changer transitions 8/910 dead transitions. [2023-08-30 19:03:48,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 910 transitions, 48225 flow [2023-08-30 19:03:48,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:03:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:03:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1662 transitions. [2023-08-30 19:03:48,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776414451261077 [2023-08-30 19:03:48,187 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1662 transitions. [2023-08-30 19:03:48,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1662 transitions. [2023-08-30 19:03:48,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:03:48,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1662 transitions. [2023-08-30 19:03:48,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.66666666666666) internal successors, (1662), 9 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:48,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:48,191 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:48,191 INFO L175 Difference]: Start difference. First operand has 566 places, 885 transitions, 45794 flow. Second operand 9 states and 1662 transitions. [2023-08-30 19:03:48,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 910 transitions, 48225 flow [2023-08-30 19:03:54,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 910 transitions, 48028 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-30 19:03:54,778 INFO L231 Difference]: Finished difference. Result has 565 places, 887 transitions, 46405 flow [2023-08-30 19:03:54,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=45597, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=46405, PETRI_PLACES=565, PETRI_TRANSITIONS=887} [2023-08-30 19:03:54,779 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 542 predicate places. [2023-08-30 19:03:54,779 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 887 transitions, 46405 flow [2023-08-30 19:03:54,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.1) internal successors, (3622), 20 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:54,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:03:54,779 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:03:54,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2023-08-30 19:03:54,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2023-08-30 19:03:54,980 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:03:54,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:03:54,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1827791477, now seen corresponding path program 86 times [2023-08-30 19:03:54,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:03:54,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463033034] [2023-08-30 19:03:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:03:54,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:03:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:03:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:55,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:03:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463033034] [2023-08-30 19:03:55,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463033034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:03:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535480664] [2023-08-30 19:03:55,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:03:55,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:03:55,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:03:55,475 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:03:55,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-08-30 19:03:55,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:03:55,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:03:55,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:03:55,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:03:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:56,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:03:56,247 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-30 19:03:56,247 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 63 treesize of output 67 [2023-08-30 19:03:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:03:56,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535480664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:03:56,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:03:56,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-30 19:03:56,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547020870] [2023-08-30 19:03:56,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:03:56,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 19:03:56,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:03:56,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 19:03:56,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-08-30 19:03:57,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-08-30 19:03:57,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 887 transitions, 46405 flow. Second operand has 22 states, 22 states have (on average 182.0) internal successors, (4004), 22 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:03:57,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:03:57,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-08-30 19:03:57,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:04:01,032 INFO L130 PetriNetUnfolder]: 4343/7619 cut-off events. [2023-08-30 19:04:01,032 INFO L131 PetriNetUnfolder]: For 1260097/1260097 co-relation queries the response was YES. [2023-08-30 19:04:01,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171941 conditions, 7619 events. 4343/7619 cut-off events. For 1260097/1260097 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 55839 event pairs, 1130 based on Foata normal form. 4/7623 useless extension candidates. Maximal degree in co-relation 171688. Up to 5137 conditions per place. [2023-08-30 19:04:01,182 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 575 selfloop transitions, 322 changer transitions 7/904 dead transitions. [2023-08-30 19:04:01,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 904 transitions, 48308 flow [2023-08-30 19:04:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 19:04:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 19:04:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1671 transitions. [2023-08-30 19:04:01,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37968643490115883 [2023-08-30 19:04:01,183 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1671 transitions. [2023-08-30 19:04:01,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1671 transitions. [2023-08-30 19:04:01,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:04:01,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1671 transitions. [2023-08-30 19:04:01,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 185.66666666666666) internal successors, (1671), 9 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:01,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:01,186 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:01,187 INFO L175 Difference]: Start difference. First operand has 565 places, 887 transitions, 46405 flow. Second operand 9 states and 1671 transitions. [2023-08-30 19:04:01,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 904 transitions, 48308 flow [2023-08-30 19:04:07,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 904 transitions, 47639 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-08-30 19:04:07,780 INFO L231 Difference]: Finished difference. Result has 567 places, 883 transitions, 46211 flow [2023-08-30 19:04:07,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=45740, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=46211, PETRI_PLACES=567, PETRI_TRANSITIONS=883} [2023-08-30 19:04:07,782 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 544 predicate places. [2023-08-30 19:04:07,782 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 883 transitions, 46211 flow [2023-08-30 19:04:07,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 182.0) internal successors, (4004), 22 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:07,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:04:07,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:04:07,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2023-08-30 19:04:07,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:04:07,990 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 19:04:07,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:04:07,990 INFO L85 PathProgramCache]: Analyzing trace with hash -34149157, now seen corresponding path program 87 times [2023-08-30 19:04:07,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:04:07,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703127370] [2023-08-30 19:04:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:04:07,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:04:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:04:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:04:09,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:04:09,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703127370] [2023-08-30 19:04:09,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703127370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:04:09,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804045001] [2023-08-30 19:04:09,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:04:09,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:04:09,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:04:09,542 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 19:04:09,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-08-30 19:04:09,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 19:04:09,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:04:09,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 19:04:09,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:04:10,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:04:10,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 61 [2023-08-30 19:04:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:04:10,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:04:10,449 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 19:04:10,449 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 [2023-08-30 19:04:10,482 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 19:04:10,482 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 [2023-08-30 19:04:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-30 19:04:10,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804045001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:04:10,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:04:10,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 34 [2023-08-30 19:04:10,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161321186] [2023-08-30 19:04:10,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:04:10,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 19:04:10,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:04:10,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 19:04:10,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 19:04:12,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 489 [2023-08-30 19:04:12,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 883 transitions, 46211 flow. Second operand has 34 states, 34 states have (on average 166.73529411764707) internal successors, (5669), 34 states have internal predecessors, (5669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:12,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:04:12,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 489 [2023-08-30 19:04:12,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:04:24,247 INFO L130 PetriNetUnfolder]: 8643/15116 cut-off events. [2023-08-30 19:04:24,247 INFO L131 PetriNetUnfolder]: For 2488363/2488363 co-relation queries the response was YES. [2023-08-30 19:04:24,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338920 conditions, 15116 events. 8643/15116 cut-off events. For 2488363/2488363 co-relation queries the response was YES. Maximal size of possible extension queue 1302. Compared 122630 event pairs, 1425 based on Foata normal form. 8/15124 useless extension candidates. Maximal degree in co-relation 335916. Up to 4556 conditions per place. [2023-08-30 19:04:24,738 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 866 selfloop transitions, 1426 changer transitions 12/2304 dead transitions. [2023-08-30 19:04:24,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 2304 transitions, 127938 flow [2023-08-30 19:04:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-30 19:04:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-30 19:04:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 9113 transitions. [2023-08-30 19:04:24,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345110959630387 [2023-08-30 19:04:24,743 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 9113 transitions. [2023-08-30 19:04:24,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 9113 transitions. [2023-08-30 19:04:24,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:04:24,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 9113 transitions. [2023-08-30 19:04:24,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 168.75925925925927) internal successors, (9113), 54 states have internal predecessors, (9113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:24,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 489.0) internal successors, (26895), 55 states have internal predecessors, (26895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:24,764 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 489.0) internal successors, (26895), 55 states have internal predecessors, (26895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:04:24,764 INFO L175 Difference]: Start difference. First operand has 567 places, 883 transitions, 46211 flow. Second operand 54 states and 9113 transitions. [2023-08-30 19:04:24,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 2304 transitions, 127938 flow Killed by 15