./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:24:19,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:24:19,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:24:19,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:24:19,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:24:19,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:24:19,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:24:19,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:24:19,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:24:19,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:24:19,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:24:19,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:24:19,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:24:19,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:24:19,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:24:19,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:24:19,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:24:19,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:24:19,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:24:19,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:24:19,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:24:19,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:24:19,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:24:19,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:24:19,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:24:19,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:24:19,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:24:19,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:24:19,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:24:19,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:24:19,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:24:19,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:24:19,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:24:19,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:24:19,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:24:19,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:24:19,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:24:19,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:24:19,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:24:19,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:24:19,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:24:19,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:24:19,596 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:24:19,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:24:19,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:24:19,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:24:19,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:24:19,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:24:19,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:24:19,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:24:19,599 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:24:19,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:24:19,600 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:24:19,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:24:19,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:24:19,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:24:19,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:24:19,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:24:19,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:24:19,602 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:24:19,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:24:19,602 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:24:19,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:24:19,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:24:19,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:24:19,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:24:19,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:24:19,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:24:19,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:24:19,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:24:19,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:24:19,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:24:19,604 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:24:19,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:24:19,605 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:24:19,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:24:19,605 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:24:19,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:24:19,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:24:19,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:24:19,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:24:19,899 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:24:19,899 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:24:19,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-09-01 11:24:21,125 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:24:21,368 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:24:21,370 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-09-01 11:24:21,375 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a762a92e/175d79c039944a46bf5c0282c5b9123e/FLAG71054754c [2023-09-01 11:24:21,390 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a762a92e/175d79c039944a46bf5c0282c5b9123e [2023-09-01 11:24:21,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:24:21,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:24:21,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:24:21,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:24:21,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:24:21,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4184e87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21, skipping insertion in model container [2023-09-01 11:24:21,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:24:21,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:24:21,547 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/array-eq-symm.wvr.c[2251,2264] [2023-09-01 11:24:21,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:24:21,564 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:24:21,581 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/array-eq-symm.wvr.c[2251,2264] [2023-09-01 11:24:21,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:24:21,597 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:24:21,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21 WrapperNode [2023-09-01 11:24:21,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:24:21,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:24:21,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:24:21,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:24:21,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,629 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 116 [2023-09-01 11:24:21,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:24:21,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:24:21,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:24:21,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:24:21,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,652 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:24:21,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:24:21,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:24:21,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:24:21,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (1/1) ... [2023-09-01 11:24:21,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:24:21,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:21,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 11:24:21,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 11:24:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:24:21,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 11:24:21,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 11:24:21,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 11:24:21,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 11:24:21,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:24:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:24:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:24:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 11:24:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:24:21,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:24:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:24:21,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:24:21,741 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 11:24:21,852 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:24:21,854 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:24:22,181 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:24:22,191 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:24:22,191 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 11:24:22,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:24:22 BoogieIcfgContainer [2023-09-01 11:24:22,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:24:22,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:24:22,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:24:22,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:24:22,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:24:21" (1/3) ... [2023-09-01 11:24:22,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4a18eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:24:22, skipping insertion in model container [2023-09-01 11:24:22,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:24:21" (2/3) ... [2023-09-01 11:24:22,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4a18eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:24:22, skipping insertion in model container [2023-09-01 11:24:22,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:24:22" (3/3) ... [2023-09-01 11:24:22,213 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-09-01 11:24:22,221 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:24:22,230 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:24:22,230 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:24:22,230 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:24:22,318 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:24:22,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 163 transitions, 342 flow [2023-09-01 11:24:22,427 INFO L130 PetriNetUnfolder]: 15/161 cut-off events. [2023-09-01 11:24:22,428 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:24:22,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 15/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2023-09-01 11:24:22,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 163 transitions, 342 flow [2023-09-01 11:24:22,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 153 transitions, 318 flow [2023-09-01 11:24:22,441 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:24:22,449 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 153 transitions, 318 flow [2023-09-01 11:24:22,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 153 transitions, 318 flow [2023-09-01 11:24:22,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 153 transitions, 318 flow [2023-09-01 11:24:22,492 INFO L130 PetriNetUnfolder]: 15/153 cut-off events. [2023-09-01 11:24:22,494 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:24:22,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 15/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2023-09-01 11:24:22,497 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-09-01 11:24:27,054 INFO L134 LiptonReduction]: Checked pairs total: 1281 [2023-09-01 11:24:27,054 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-09-01 11:24:27,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 11:24:27,072 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;@239ce445, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:24:27,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 11:24:27,077 INFO L130 PetriNetUnfolder]: 5/18 cut-off events. [2023-09-01 11:24:27,077 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:24:27,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:27,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:27,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:27,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1496650072, now seen corresponding path program 1 times [2023-09-01 11:24:27,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:27,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334493321] [2023-09-01 11:24:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:27,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:27,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:27,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334493321] [2023-09-01 11:24:27,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334493321] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:24:27,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:24:27,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 11:24:27,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927963996] [2023-09-01 11:24:27,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:24:27,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:24:27,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:27,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:24:27,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:24:27,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 324 [2023-09-01 11:24:27,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:27,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:27,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 324 [2023-09-01 11:24:27,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:27,690 INFO L130 PetriNetUnfolder]: 71/121 cut-off events. [2023-09-01 11:24:27,691 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 11:24:27,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 121 events. 71/121 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 274 event pairs, 15 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2023-09-01 11:24:27,693 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 27 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2023-09-01 11:24:27,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 31 transitions, 145 flow [2023-09-01 11:24:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:24:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:24:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-09-01 11:24:27,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48662551440329216 [2023-09-01 11:24:27,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-09-01 11:24:27,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-09-01 11:24:27,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:27,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-09-01 11:24:27,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:27,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:27,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:27,722 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 50 flow. Second operand 3 states and 473 transitions. [2023-09-01 11:24:27,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 31 transitions, 145 flow [2023-09-01 11:24:27,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 11:24:27,726 INFO L231 Difference]: Finished difference. Result has 20 places, 21 transitions, 61 flow [2023-09-01 11:24:27,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=20, PETRI_TRANSITIONS=21} [2023-09-01 11:24:27,731 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-09-01 11:24:27,731 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 21 transitions, 61 flow [2023-09-01 11:24:27,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:27,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:27,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:27,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:24:27,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:27,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:27,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1210615754, now seen corresponding path program 1 times [2023-09-01 11:24:27,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:27,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151461491] [2023-09-01 11:24:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:27,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:27,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:27,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151461491] [2023-09-01 11:24:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151461491] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:24:27,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:24:27,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:24:27,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812430050] [2023-09-01 11:24:27,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:24:27,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:24:27,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:24:27,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:24:27,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2023-09-01 11:24:27,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 21 transitions, 61 flow. Second operand has 4 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:27,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:27,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2023-09-01 11:24:27,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:28,056 INFO L130 PetriNetUnfolder]: 125/225 cut-off events. [2023-09-01 11:24:28,056 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-09-01 11:24:28,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 225 events. 125/225 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 675 event pairs, 71 based on Foata normal form. 16/213 useless extension candidates. Maximal degree in co-relation 200. Up to 122 conditions per place. [2023-09-01 11:24:28,058 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 36 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-09-01 11:24:28,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 186 flow [2023-09-01 11:24:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:24:28,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:24:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 585 transitions. [2023-09-01 11:24:28,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2023-09-01 11:24:28,062 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 585 transitions. [2023-09-01 11:24:28,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 585 transitions. [2023-09-01 11:24:28,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:28,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 585 transitions. [2023-09-01 11:24:28,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,068 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,068 INFO L175 Difference]: Start difference. First operand has 20 places, 21 transitions, 61 flow. Second operand 4 states and 585 transitions. [2023-09-01 11:24:28,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 186 flow [2023-09-01 11:24:28,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:24:28,070 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 80 flow [2023-09-01 11:24:28,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2023-09-01 11:24:28,071 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-09-01 11:24:28,071 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 80 flow [2023-09-01 11:24:28,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:28,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:28,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 11:24:28,073 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:28,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:28,073 INFO L85 PathProgramCache]: Analyzing trace with hash 991297935, now seen corresponding path program 1 times [2023-09-01 11:24:28,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:28,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838648927] [2023-09-01 11:24:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:28,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:28,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:28,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838648927] [2023-09-01 11:24:28,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838648927] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:24:28,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:24:28,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:24:28,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28968422] [2023-09-01 11:24:28,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:24:28,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:24:28,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:24:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:24:28,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2023-09-01 11:24:28,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:28,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2023-09-01 11:24:28,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:28,409 INFO L130 PetriNetUnfolder]: 81/151 cut-off events. [2023-09-01 11:24:28,409 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-09-01 11:24:28,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 151 events. 81/151 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 397 event pairs, 45 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 294. Up to 122 conditions per place. [2023-09-01 11:24:28,411 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 20 selfloop transitions, 2 changer transitions 12/34 dead transitions. [2023-09-01 11:24:28,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 174 flow [2023-09-01 11:24:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:24:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:24:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 581 transitions. [2023-09-01 11:24:28,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44830246913580246 [2023-09-01 11:24:28,413 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 581 transitions. [2023-09-01 11:24:28,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 581 transitions. [2023-09-01 11:24:28,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:28,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 581 transitions. [2023-09-01 11:24:28,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,418 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,418 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 80 flow. Second operand 4 states and 581 transitions. [2023-09-01 11:24:28,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 174 flow [2023-09-01 11:24:28,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 168 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 11:24:28,420 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 74 flow [2023-09-01 11:24:28,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-09-01 11:24:28,421 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-09-01 11:24:28,421 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 74 flow [2023-09-01 11:24:28,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:28,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:28,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 11:24:28,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:28,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash -369944271, now seen corresponding path program 1 times [2023-09-01 11:24:28,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:28,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564852300] [2023-09-01 11:24:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:24:28,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:28,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564852300] [2023-09-01 11:24:28,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564852300] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:24:28,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:24:28,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:24:28,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194935822] [2023-09-01 11:24:28,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:24:28,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:24:28,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:24:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:24:28,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 324 [2023-09-01 11:24:28,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:28,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 324 [2023-09-01 11:24:28,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:28,677 INFO L130 PetriNetUnfolder]: 150/268 cut-off events. [2023-09-01 11:24:28,677 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-09-01 11:24:28,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 268 events. 150/268 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 851 event pairs, 70 based on Foata normal form. 16/281 useless extension candidates. Maximal degree in co-relation 639. Up to 106 conditions per place. [2023-09-01 11:24:28,679 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 43 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-09-01 11:24:28,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 248 flow [2023-09-01 11:24:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:24:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:24:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2023-09-01 11:24:28,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2023-09-01 11:24:28,683 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 726 transitions. [2023-09-01 11:24:28,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 726 transitions. [2023-09-01 11:24:28,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:28,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 726 transitions. [2023-09-01 11:24:28,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,688 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,689 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 74 flow. Second operand 5 states and 726 transitions. [2023-09-01 11:24:28,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 248 flow [2023-09-01 11:24:28,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 49 transitions, 236 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 11:24:28,691 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 103 flow [2023-09-01 11:24:28,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-09-01 11:24:28,691 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-09-01 11:24:28,692 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 103 flow [2023-09-01 11:24:28,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:28,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:28,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 11:24:28,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:28,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:28,694 INFO L85 PathProgramCache]: Analyzing trace with hash 631656796, now seen corresponding path program 1 times [2023-09-01 11:24:28,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:28,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823196203] [2023-09-01 11:24:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:28,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:24:28,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:28,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823196203] [2023-09-01 11:24:28,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823196203] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:24:28,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:24:28,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:24:28,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285711391] [2023-09-01 11:24:28,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:24:28,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:24:28,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:28,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:24:28,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:24:28,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 324 [2023-09-01 11:24:28,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:28,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:28,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 324 [2023-09-01 11:24:28,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:29,003 INFO L130 PetriNetUnfolder]: 132/238 cut-off events. [2023-09-01 11:24:29,004 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-09-01 11:24:29,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 238 events. 132/238 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 712 event pairs, 54 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 603. Up to 113 conditions per place. [2023-09-01 11:24:29,006 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 32 selfloop transitions, 5 changer transitions 10/47 dead transitions. [2023-09-01 11:24:29,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 258 flow [2023-09-01 11:24:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:24:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:24:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 724 transitions. [2023-09-01 11:24:29,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469135802469136 [2023-09-01 11:24:29,009 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 724 transitions. [2023-09-01 11:24:29,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 724 transitions. [2023-09-01 11:24:29,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:29,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 724 transitions. [2023-09-01 11:24:29,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:29,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:29,014 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:29,014 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 103 flow. Second operand 5 states and 724 transitions. [2023-09-01 11:24:29,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 258 flow [2023-09-01 11:24:29,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 47 transitions, 248 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 11:24:29,018 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 113 flow [2023-09-01 11:24:29,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-09-01 11:24:29,021 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-09-01 11:24:29,021 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 113 flow [2023-09-01 11:24:29,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:29,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:29,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:29,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 11:24:29,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:29,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:29,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1758776951, now seen corresponding path program 1 times [2023-09-01 11:24:29,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:29,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10505369] [2023-09-01 11:24:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:29,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:24:29,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:29,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10505369] [2023-09-01 11:24:29,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10505369] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:29,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523536065] [2023-09-01 11:24:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:29,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:29,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:29,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:29,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:24:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:29,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:24:29,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:24:29,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:24:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523536065] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:29,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:24:29,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-09-01 11:24:29,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818732346] [2023-09-01 11:24:29,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:24:29,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:24:29,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:29,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:24:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-09-01 11:24:29,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 324 [2023-09-01 11:24:29,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:29,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:29,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 324 [2023-09-01 11:24:29,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:29,793 INFO L130 PetriNetUnfolder]: 125/235 cut-off events. [2023-09-01 11:24:29,794 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2023-09-01 11:24:29,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 235 events. 125/235 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 756 event pairs, 41 based on Foata normal form. 10/244 useless extension candidates. Maximal degree in co-relation 629. Up to 85 conditions per place. [2023-09-01 11:24:29,796 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 38 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-09-01 11:24:29,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 271 flow [2023-09-01 11:24:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:24:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:24:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 946 transitions. [2023-09-01 11:24:29,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41710758377425045 [2023-09-01 11:24:29,799 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 946 transitions. [2023-09-01 11:24:29,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 946 transitions. [2023-09-01 11:24:29,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:29,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 946 transitions. [2023-09-01 11:24:29,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 135.14285714285714) internal successors, (946), 7 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:29,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:29,805 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:29,806 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 113 flow. Second operand 7 states and 946 transitions. [2023-09-01 11:24:29,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 271 flow [2023-09-01 11:24:29,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 262 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 11:24:29,808 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 136 flow [2023-09-01 11:24:29,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=136, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-09-01 11:24:29,809 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-09-01 11:24:29,809 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 136 flow [2023-09-01 11:24:29,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:29,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:29,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:29,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 11:24:30,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-09-01 11:24:30,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:30,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash 721061444, now seen corresponding path program 1 times [2023-09-01 11:24:30,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:30,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931644505] [2023-09-01 11:24:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:30,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:30,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:30,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931644505] [2023-09-01 11:24:30,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931644505] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:30,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500263776] [2023-09-01 11:24:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:30,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:30,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:30,617 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:30,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:24:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:30,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:24:30,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:30,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:31,112 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:24:31,113 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 [2023-09-01 11:24:31,148 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:24:31,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:24:31,155 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:24:31,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:24:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:31,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500263776] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:31,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:24:31,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 18 [2023-09-01 11:24:31,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367922628] [2023-09-01 11:24:31,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:24:31,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 11:24:31,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:31,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 11:24:31,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:24:31,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-09-01 11:24:31,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 136 flow. Second operand has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:31,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:31,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-09-01 11:24:31,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:32,004 INFO L130 PetriNetUnfolder]: 138/255 cut-off events. [2023-09-01 11:24:32,005 INFO L131 PetriNetUnfolder]: For 255/255 co-relation queries the response was YES. [2023-09-01 11:24:32,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 765 conditions, 255 events. 138/255 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 844 event pairs, 30 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 735. Up to 198 conditions per place. [2023-09-01 11:24:32,007 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 29 selfloop transitions, 11 changer transitions 4/44 dead transitions. [2023-09-01 11:24:32,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 278 flow [2023-09-01 11:24:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:24:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:24:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 954 transitions. [2023-09-01 11:24:32,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3680555555555556 [2023-09-01 11:24:32,011 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 954 transitions. [2023-09-01 11:24:32,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 954 transitions. [2023-09-01 11:24:32,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:32,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 954 transitions. [2023-09-01 11:24:32,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.25) internal successors, (954), 8 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:32,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:32,020 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:32,020 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 136 flow. Second operand 8 states and 954 transitions. [2023-09-01 11:24:32,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 278 flow [2023-09-01 11:24:32,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 260 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-09-01 11:24:32,023 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 185 flow [2023-09-01 11:24:32,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-09-01 11:24:32,024 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-09-01 11:24:32,024 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 185 flow [2023-09-01 11:24:32,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:32,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:32,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:32,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 11:24:32,230 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,SelfDestructingSolverStorable6 [2023-09-01 11:24:32,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:32,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash -867319260, now seen corresponding path program 2 times [2023-09-01 11:24:32,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:32,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299569122] [2023-09-01 11:24:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:32,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:32,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:32,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299569122] [2023-09-01 11:24:32,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299569122] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:32,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144213893] [2023-09-01 11:24:32,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:24:32,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:32,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:32,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:32,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:24:32,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:24:32,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:24:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:24:32,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:33,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:33,191 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:24:33,191 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 47 treesize of output 80 [2023-09-01 11:24:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:33,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144213893] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:33,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:24:33,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-09-01 11:24:33,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347907204] [2023-09-01 11:24:33,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:24:33,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 11:24:33,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:33,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 11:24:33,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:24:33,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-09-01 11:24:33,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 185 flow. Second operand has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:33,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:33,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-09-01 11:24:33,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:33,957 INFO L130 PetriNetUnfolder]: 133/248 cut-off events. [2023-09-01 11:24:33,957 INFO L131 PetriNetUnfolder]: For 319/319 co-relation queries the response was YES. [2023-09-01 11:24:33,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 248 events. 133/248 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 805 event pairs, 35 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 842. Up to 196 conditions per place. [2023-09-01 11:24:33,959 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 30 selfloop transitions, 10 changer transitions 7/47 dead transitions. [2023-09-01 11:24:33,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 346 flow [2023-09-01 11:24:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:24:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:24:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 953 transitions. [2023-09-01 11:24:33,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36766975308641975 [2023-09-01 11:24:33,962 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 953 transitions. [2023-09-01 11:24:33,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 953 transitions. [2023-09-01 11:24:33,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:33,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 953 transitions. [2023-09-01 11:24:33,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.125) internal successors, (953), 8 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:33,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:33,969 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:33,969 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 185 flow. Second operand 8 states and 953 transitions. [2023-09-01 11:24:33,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 346 flow [2023-09-01 11:24:33,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 318 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-09-01 11:24:33,972 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 212 flow [2023-09-01 11:24:33,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=212, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-09-01 11:24:33,973 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-09-01 11:24:33,973 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 212 flow [2023-09-01 11:24:33,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.125) internal successors, (929), 8 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:33,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:33,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:33,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:24:34,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:34,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:34,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:34,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1485650043, now seen corresponding path program 1 times [2023-09-01 11:24:34,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:34,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340067731] [2023-09-01 11:24:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:34,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:34,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340067731] [2023-09-01 11:24:34,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340067731] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:24:34,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:24:34,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 11:24:34,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820126519] [2023-09-01 11:24:34,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:24:34,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:24:34,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:34,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:24:34,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:24:35,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 324 [2023-09-01 11:24:35,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 212 flow. Second operand has 9 states, 9 states have (on average 130.88888888888889) internal successors, (1178), 9 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:35,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:35,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 324 [2023-09-01 11:24:35,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:35,187 INFO L130 PetriNetUnfolder]: 126/239 cut-off events. [2023-09-01 11:24:35,188 INFO L131 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2023-09-01 11:24:35,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 239 events. 126/239 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 777 event pairs, 38 based on Foata normal form. 4/242 useless extension candidates. Maximal degree in co-relation 847. Up to 192 conditions per place. [2023-09-01 11:24:35,190 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 30 selfloop transitions, 8 changer transitions 10/48 dead transitions. [2023-09-01 11:24:35,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 369 flow [2023-09-01 11:24:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:24:35,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:24:35,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 685 transitions. [2023-09-01 11:24:35,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228395061728395 [2023-09-01 11:24:35,193 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 685 transitions. [2023-09-01 11:24:35,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 685 transitions. [2023-09-01 11:24:35,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:35,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 685 transitions. [2023-09-01 11:24:35,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:35,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:35,198 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:35,198 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 212 flow. Second operand 5 states and 685 transitions. [2023-09-01 11:24:35,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 369 flow [2023-09-01 11:24:35,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 354 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-09-01 11:24:35,200 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 225 flow [2023-09-01 11:24:35,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2023-09-01 11:24:35,201 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-09-01 11:24:35,201 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 225 flow [2023-09-01 11:24:35,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 130.88888888888889) internal successors, (1178), 9 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:35,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:35,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:35,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 11:24:35,203 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:35,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:35,203 INFO L85 PathProgramCache]: Analyzing trace with hash -708957346, now seen corresponding path program 3 times [2023-09-01 11:24:35,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:35,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742462718] [2023-09-01 11:24:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:35,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:35,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:35,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742462718] [2023-09-01 11:24:35,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742462718] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:35,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171347073] [2023-09-01 11:24:35,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:24:35,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:35,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:35,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:35,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:24:35,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:24:35,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:24:35,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:24:35,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:35,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:36,078 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:24:36,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:24:36,103 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:24:36,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:24:36,110 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:24:36,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:24:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:36,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171347073] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:24:36,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:24:36,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-09-01 11:24:36,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371932226] [2023-09-01 11:24:36,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:24:36,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 11:24:36,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 11:24:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-09-01 11:24:37,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-09-01 11:24:37,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 225 flow. Second operand has 18 states, 18 states have (on average 113.88888888888889) internal successors, (2050), 18 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:37,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:37,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-09-01 11:24:37,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:37,524 INFO L130 PetriNetUnfolder]: 135/253 cut-off events. [2023-09-01 11:24:37,524 INFO L131 PetriNetUnfolder]: For 424/424 co-relation queries the response was YES. [2023-09-01 11:24:37,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 253 events. 135/253 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 839 event pairs, 6 based on Foata normal form. 12/264 useless extension candidates. Maximal degree in co-relation 924. Up to 196 conditions per place. [2023-09-01 11:24:37,527 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-09-01 11:24:37,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 371 flow [2023-09-01 11:24:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:24:37,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:24:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1051 transitions. [2023-09-01 11:24:37,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604252400548697 [2023-09-01 11:24:37,532 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1051 transitions. [2023-09-01 11:24:37,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1051 transitions. [2023-09-01 11:24:37,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:37,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1051 transitions. [2023-09-01 11:24:37,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:37,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:37,539 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:37,539 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 225 flow. Second operand 9 states and 1051 transitions. [2023-09-01 11:24:37,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 371 flow [2023-09-01 11:24:37,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 362 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:24:37,542 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 265 flow [2023-09-01 11:24:37,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=265, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-09-01 11:24:37,544 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-09-01 11:24:37,544 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 265 flow [2023-09-01 11:24:37,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 113.88888888888889) internal successors, (2050), 18 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:37,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:37,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:37,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:24:37,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:37,751 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:37,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:37,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1100878043, now seen corresponding path program 2 times [2023-09-01 11:24:37,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:37,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564188156] [2023-09-01 11:24:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:37,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:38,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:38,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564188156] [2023-09-01 11:24:38,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564188156] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:38,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328566963] [2023-09-01 11:24:38,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:24:38,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:38,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:38,041 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:38,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 11:24:38,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:24:38,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:24:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 11:24:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:38,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:38,326 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:24:38,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:24:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:38,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328566963] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:24:38,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:24:38,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-09-01 11:24:38,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808419139] [2023-09-01 11:24:38,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:24:38,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:24:38,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:38,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:24:38,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:24:38,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-09-01 11:24:38,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 265 flow. Second operand has 11 states, 11 states have (on average 132.9090909090909) internal successors, (1462), 11 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:38,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:38,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-09-01 11:24:38,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:38,824 INFO L130 PetriNetUnfolder]: 141/263 cut-off events. [2023-09-01 11:24:38,824 INFO L131 PetriNetUnfolder]: For 673/673 co-relation queries the response was YES. [2023-09-01 11:24:38,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 263 events. 141/263 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 872 event pairs, 49 based on Foata normal form. 4/267 useless extension candidates. Maximal degree in co-relation 1045. Up to 230 conditions per place. [2023-09-01 11:24:38,826 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 33 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2023-09-01 11:24:38,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 385 flow [2023-09-01 11:24:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:24:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:24:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 686 transitions. [2023-09-01 11:24:38,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42345679012345677 [2023-09-01 11:24:38,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 686 transitions. [2023-09-01 11:24:38,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 686 transitions. [2023-09-01 11:24:38,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:38,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 686 transitions. [2023-09-01 11:24:38,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.2) internal successors, (686), 5 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:38,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:38,834 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:38,834 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 265 flow. Second operand 5 states and 686 transitions. [2023-09-01 11:24:38,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 385 flow [2023-09-01 11:24:38,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 360 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 11:24:38,837 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 274 flow [2023-09-01 11:24:38,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-09-01 11:24:38,837 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-09-01 11:24:38,838 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 274 flow [2023-09-01 11:24:38,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 132.9090909090909) internal successors, (1462), 11 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:38,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:38,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:38,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 11:24:39,044 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,SelfDestructingSolverStorable10 [2023-09-01 11:24:39,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:39,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:39,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2141083410, now seen corresponding path program 4 times [2023-09-01 11:24:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:39,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621544049] [2023-09-01 11:24:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:39,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:39,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:39,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621544049] [2023-09-01 11:24:39,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621544049] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:39,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18050400] [2023-09-01 11:24:39,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:24:39,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:39,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:39,661 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:39,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 11:24:39,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:24:39,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:24:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 11:24:39,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:39,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 11:24:39,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:24:40,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:24:40,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:24:40,096 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:24:40,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-09-01 11:24:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:24:40,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:40,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:24:40,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-09-01 11:24:40,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:24:40,421 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 102 treesize of output 82 [2023-09-01 11:24:40,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:24:40,431 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 70 treesize of output 55 [2023-09-01 11:24:40,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:24:40,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 70 [2023-09-01 11:24:40,514 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-09-01 11:24:40,515 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 508 treesize of output 473 [2023-09-01 11:24:40,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:24:40,572 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 342 treesize of output 254 [2023-09-01 11:24:40,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:24:40,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 316 treesize of output 308 [2023-09-01 11:24:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:24:42,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18050400] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:24:42,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:24:42,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2023-09-01 11:24:42,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128661856] [2023-09-01 11:24:42,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:24:42,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 11:24:42,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:42,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 11:24:42,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=425, Unknown=6, NotChecked=0, Total=506 [2023-09-01 11:24:42,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-09-01 11:24:42,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 274 flow. Second operand has 23 states, 23 states have (on average 81.65217391304348) internal successors, (1878), 23 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:42,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:42,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-09-01 11:24:42,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:43,489 INFO L130 PetriNetUnfolder]: 172/329 cut-off events. [2023-09-01 11:24:43,490 INFO L131 PetriNetUnfolder]: For 819/819 co-relation queries the response was YES. [2023-09-01 11:24:43,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 329 events. 172/329 cut-off events. For 819/819 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1251 event pairs, 6 based on Foata normal form. 20/349 useless extension candidates. Maximal degree in co-relation 1289. Up to 157 conditions per place. [2023-09-01 11:24:43,492 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 45 selfloop transitions, 17 changer transitions 1/63 dead transitions. [2023-09-01 11:24:43,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 515 flow [2023-09-01 11:24:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:24:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:24:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 777 transitions. [2023-09-01 11:24:43,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2664609053497942 [2023-09-01 11:24:43,495 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 777 transitions. [2023-09-01 11:24:43,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 777 transitions. [2023-09-01 11:24:43,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:43,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 777 transitions. [2023-09-01 11:24:43,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 86.33333333333333) internal successors, (777), 9 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:43,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:43,501 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:43,502 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 274 flow. Second operand 9 states and 777 transitions. [2023-09-01 11:24:43,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 515 flow [2023-09-01 11:24:43,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 497 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 11:24:43,507 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 336 flow [2023-09-01 11:24:43,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=336, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-09-01 11:24:43,508 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-09-01 11:24:43,508 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 336 flow [2023-09-01 11:24:43,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.65217391304348) internal successors, (1878), 23 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:43,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:43,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:43,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 11:24:43,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:43,716 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:43,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:43,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1109515910, now seen corresponding path program 5 times [2023-09-01 11:24:43,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:43,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491819845] [2023-09-01 11:24:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:43,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:44,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:44,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491819845] [2023-09-01 11:24:44,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491819845] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:44,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583260813] [2023-09-01 11:24:44,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:24:44,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:44,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:44,189 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:44,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 11:24:44,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:24:44,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:24:44,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 11:24:44,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:44,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:24:44,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:24:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:44,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:44,664 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse4 (forall ((v_ArrVal_369 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_369) ~B~0.base) (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork1_#t~mem1|))))) (and (forall ((v_ArrVal_369 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_369))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select .cse2 (+ .cse1 ~B~0.offset)))) (not (= (select .cse2 (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork1_#t~mem1|)))))) (or (< c_~i_BA~0 c_~Bn~0) .cse4) (or (< c_~i_BA~0 c_~An~0) .cse4)))) is different from false [2023-09-01 11:24:44,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:24:44,684 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 48 treesize of output 36 [2023-09-01 11:24:44,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 11:24:44,745 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-09-01 11:24:44,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 151 [2023-09-01 11:24:44,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:24:44,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 92 [2023-09-01 11:24:44,965 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:24:44,966 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 48 treesize of output 24 [2023-09-01 11:24:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:24:45,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583260813] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:45,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:24:45,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-09-01 11:24:45,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623297768] [2023-09-01 11:24:45,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:24:45,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:24:45,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:24:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=393, Unknown=1, NotChecked=40, Total=506 [2023-09-01 11:24:45,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-09-01 11:24:45,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 336 flow. Second operand has 9 states, 9 states have (on average 85.88888888888889) internal successors, (773), 9 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:45,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:45,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-09-01 11:24:45,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:50,547 WARN L222 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 61 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:24:51,126 INFO L130 PetriNetUnfolder]: 164/297 cut-off events. [2023-09-01 11:24:51,126 INFO L131 PetriNetUnfolder]: For 1186/1186 co-relation queries the response was YES. [2023-09-01 11:24:51,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 297 events. 164/297 cut-off events. For 1186/1186 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1008 event pairs, 27 based on Foata normal form. 2/299 useless extension candidates. Maximal degree in co-relation 1381. Up to 271 conditions per place. [2023-09-01 11:24:51,129 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 30 selfloop transitions, 16 changer transitions 3/49 dead transitions. [2023-09-01 11:24:51,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 49 transitions, 476 flow [2023-09-01 11:24:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:24:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:24:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 879 transitions. [2023-09-01 11:24:51,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2712962962962963 [2023-09-01 11:24:51,133 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 879 transitions. [2023-09-01 11:24:51,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 879 transitions. [2023-09-01 11:24:51,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:51,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 879 transitions. [2023-09-01 11:24:51,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.9) internal successors, (879), 10 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:51,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:51,140 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:51,140 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 336 flow. Second operand 10 states and 879 transitions. [2023-09-01 11:24:51,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 49 transitions, 476 flow [2023-09-01 11:24:51,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 49 transitions, 432 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-09-01 11:24:51,145 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 348 flow [2023-09-01 11:24:51,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=348, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2023-09-01 11:24:51,145 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-09-01 11:24:51,146 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 348 flow [2023-09-01 11:24:51,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 85.88888888888889) internal successors, (773), 9 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:51,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:51,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:51,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 11:24:51,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:51,355 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:51,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:51,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1778420361, now seen corresponding path program 3 times [2023-09-01 11:24:51,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:51,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577675057] [2023-09-01 11:24:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:51,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:51,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:51,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577675057] [2023-09-01 11:24:51,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577675057] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:51,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079136706] [2023-09-01 11:24:51,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:24:51,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:51,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:51,634 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:51,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 11:24:51,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:24:51,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:24:51,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 11:24:51,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:51,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:51,889 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:24:51,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:24:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:51,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079136706] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:24:51,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:24:51,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-09-01 11:24:51,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102314182] [2023-09-01 11:24:51,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:24:51,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:24:51,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:24:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:24:52,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-09-01 11:24:52,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 348 flow. Second operand has 11 states, 11 states have (on average 132.9090909090909) internal successors, (1462), 11 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:52,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:52,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-09-01 11:24:52,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:52,404 INFO L130 PetriNetUnfolder]: 168/301 cut-off events. [2023-09-01 11:24:52,405 INFO L131 PetriNetUnfolder]: For 953/953 co-relation queries the response was YES. [2023-09-01 11:24:52,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 301 events. 168/301 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1028 event pairs, 24 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 1402. Up to 225 conditions per place. [2023-09-01 11:24:52,407 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 43 selfloop transitions, 13 changer transitions 0/56 dead transitions. [2023-09-01 11:24:52,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 541 flow [2023-09-01 11:24:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:24:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:24:52,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 821 transitions. [2023-09-01 11:24:52,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42232510288065844 [2023-09-01 11:24:52,410 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 821 transitions. [2023-09-01 11:24:52,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 821 transitions. [2023-09-01 11:24:52,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:52,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 821 transitions. [2023-09-01 11:24:52,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.83333333333334) internal successors, (821), 6 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:52,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:52,415 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:52,415 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 348 flow. Second operand 6 states and 821 transitions. [2023-09-01 11:24:52,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 541 flow [2023-09-01 11:24:52,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 505 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-09-01 11:24:52,419 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 352 flow [2023-09-01 11:24:52,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-09-01 11:24:52,420 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-09-01 11:24:52,420 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 352 flow [2023-09-01 11:24:52,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 132.9090909090909) internal successors, (1462), 11 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:52,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:52,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:52,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 11:24:52,629 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,SelfDestructingSolverStorable13 [2023-09-01 11:24:52,630 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:52,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:52,630 INFO L85 PathProgramCache]: Analyzing trace with hash -292123197, now seen corresponding path program 4 times [2023-09-01 11:24:52,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:52,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985568830] [2023-09-01 11:24:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:52,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:53,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:53,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985568830] [2023-09-01 11:24:53,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985568830] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:53,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546733082] [2023-09-01 11:24:53,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:24:53,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:53,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:53,010 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:53,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 11:24:53,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:24:53,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:24:53,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 11:24:53,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:53,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:24:53,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:24:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:53,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:53,352 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_446 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1))))) (= (select .cse0 (+ c_~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|))))) is different from false [2023-09-01 11:24:53,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:24:53,384 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 148 treesize of output 168 [2023-09-01 11:24:53,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:24:53,403 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 84 treesize of output 86 [2023-09-01 11:24:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:53,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546733082] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:24:53,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:24:53,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2023-09-01 11:24:53,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027857317] [2023-09-01 11:24:53,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:24:53,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 11:24:53,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:53,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 11:24:53,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=220, Unknown=1, NotChecked=30, Total=306 [2023-09-01 11:24:54,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-09-01 11:24:54,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 352 flow. Second operand has 18 states, 18 states have (on average 110.22222222222223) internal successors, (1984), 18 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:54,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:54,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-09-01 11:24:54,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:54,281 INFO L130 PetriNetUnfolder]: 158/281 cut-off events. [2023-09-01 11:24:54,281 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2023-09-01 11:24:54,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 281 events. 158/281 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 912 event pairs, 40 based on Foata normal form. 4/285 useless extension candidates. Maximal degree in co-relation 1347. Up to 243 conditions per place. [2023-09-01 11:24:54,284 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 38 selfloop transitions, 12 changer transitions 0/50 dead transitions. [2023-09-01 11:24:54,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 492 flow [2023-09-01 11:24:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:24:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:24:54,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 682 transitions. [2023-09-01 11:24:54,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3508230452674897 [2023-09-01 11:24:54,287 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 682 transitions. [2023-09-01 11:24:54,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 682 transitions. [2023-09-01 11:24:54,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:54,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 682 transitions. [2023-09-01 11:24:54,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:54,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:54,292 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:54,292 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 352 flow. Second operand 6 states and 682 transitions. [2023-09-01 11:24:54,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 492 flow [2023-09-01 11:24:54,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 446 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-09-01 11:24:54,297 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 337 flow [2023-09-01 11:24:54,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-09-01 11:24:54,297 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-09-01 11:24:54,297 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 337 flow [2023-09-01 11:24:54,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 110.22222222222223) internal successors, (1984), 18 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:54,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:54,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:54,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 11:24:54,504 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,SelfDestructingSolverStorable14 [2023-09-01 11:24:54,504 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:54,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:54,505 INFO L85 PathProgramCache]: Analyzing trace with hash -705701550, now seen corresponding path program 1 times [2023-09-01 11:24:54,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:54,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866657301] [2023-09-01 11:24:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:54,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:54,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866657301] [2023-09-01 11:24:54,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866657301] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:54,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380959842] [2023-09-01 11:24:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:54,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:54,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:54,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 11:24:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:54,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 11:24:54,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:54,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:54,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380959842] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:24:54,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:24:54,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-09-01 11:24:54,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899048178] [2023-09-01 11:24:54,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:24:54,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:24:54,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:54,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:24:54,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:24:54,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-09-01 11:24:54,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 150.28571428571428) internal successors, (1052), 7 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:54,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:54,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-09-01 11:24:54,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:55,075 INFO L130 PetriNetUnfolder]: 260/474 cut-off events. [2023-09-01 11:24:55,076 INFO L131 PetriNetUnfolder]: For 1455/1455 co-relation queries the response was YES. [2023-09-01 11:24:55,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 474 events. 260/474 cut-off events. For 1455/1455 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1864 event pairs, 14 based on Foata normal form. 4/478 useless extension candidates. Maximal degree in co-relation 2165. Up to 224 conditions per place. [2023-09-01 11:24:55,080 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 67 selfloop transitions, 17 changer transitions 2/86 dead transitions. [2023-09-01 11:24:55,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 86 transitions, 756 flow [2023-09-01 11:24:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:24:55,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:24:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1083 transitions. [2023-09-01 11:24:55,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775132275132275 [2023-09-01 11:24:55,083 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1083 transitions. [2023-09-01 11:24:55,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1083 transitions. [2023-09-01 11:24:55,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:55,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1083 transitions. [2023-09-01 11:24:55,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.71428571428572) internal successors, (1083), 7 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:55,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:55,091 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:55,091 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 337 flow. Second operand 7 states and 1083 transitions. [2023-09-01 11:24:55,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 86 transitions, 756 flow [2023-09-01 11:24:55,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 727 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-09-01 11:24:55,096 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 431 flow [2023-09-01 11:24:55,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-09-01 11:24:55,097 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-09-01 11:24:55,098 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 431 flow [2023-09-01 11:24:55,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.28571428571428) internal successors, (1052), 7 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:55,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:55,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:55,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 11:24:55,304 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,SelfDestructingSolverStorable15 [2023-09-01 11:24:55,305 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:55,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:55,305 INFO L85 PathProgramCache]: Analyzing trace with hash -113070510, now seen corresponding path program 2 times [2023-09-01 11:24:55,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:55,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837413199] [2023-09-01 11:24:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:55,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:55,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:55,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837413199] [2023-09-01 11:24:55,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837413199] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:55,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309511378] [2023-09-01 11:24:55,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:24:55,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:55,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:55,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:55,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 11:24:55,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:24:55,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:24:55,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 11:24:55,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:55,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:24:55,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309511378] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:24:55,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:24:55,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-09-01 11:24:55,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536395460] [2023-09-01 11:24:55,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:24:55,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:24:55,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:24:55,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:24:55,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-09-01 11:24:55,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 431 flow. Second operand has 7 states, 7 states have (on average 150.28571428571428) internal successors, (1052), 7 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:55,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:55,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-09-01 11:24:55,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:55,879 INFO L130 PetriNetUnfolder]: 380/690 cut-off events. [2023-09-01 11:24:55,880 INFO L131 PetriNetUnfolder]: For 2640/2640 co-relation queries the response was YES. [2023-09-01 11:24:55,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3367 conditions, 690 events. 380/690 cut-off events. For 2640/2640 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3052 event pairs, 74 based on Foata normal form. 4/694 useless extension candidates. Maximal degree in co-relation 3330. Up to 474 conditions per place. [2023-09-01 11:24:55,885 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 71 selfloop transitions, 18 changer transitions 2/91 dead transitions. [2023-09-01 11:24:55,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 91 transitions, 873 flow [2023-09-01 11:24:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:24:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:24:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1078 transitions. [2023-09-01 11:24:55,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2023-09-01 11:24:55,890 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1078 transitions. [2023-09-01 11:24:55,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1078 transitions. [2023-09-01 11:24:55,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:55,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1078 transitions. [2023-09-01 11:24:55,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:55,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:55,896 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:55,897 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 431 flow. Second operand 7 states and 1078 transitions. [2023-09-01 11:24:55,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 91 transitions, 873 flow [2023-09-01 11:24:55,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 847 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 11:24:55,905 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 563 flow [2023-09-01 11:24:55,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-09-01 11:24:55,906 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-09-01 11:24:55,906 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 563 flow [2023-09-01 11:24:55,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.28571428571428) internal successors, (1052), 7 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:55,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:55,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:55,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 11:24:56,113 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,SelfDestructingSolverStorable16 [2023-09-01 11:24:56,113 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:56,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:56,114 INFO L85 PathProgramCache]: Analyzing trace with hash -604771874, now seen corresponding path program 3 times [2023-09-01 11:24:56,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:56,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394922057] [2023-09-01 11:24:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:56,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:56,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:56,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394922057] [2023-09-01 11:24:56,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394922057] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:56,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154912740] [2023-09-01 11:24:56,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:24:56,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:56,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:56,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:56,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 11:24:56,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:24:56,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:24:56,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 11:24:56,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:56,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:56,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154912740] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:24:56,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:24:56,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-09-01 11:24:56,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525378115] [2023-09-01 11:24:56,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:24:56,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 11:24:56,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:56,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 11:24:56,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-09-01 11:24:56,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-09-01 11:24:56,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 563 flow. Second operand has 15 states, 15 states have (on average 133.13333333333333) internal successors, (1997), 15 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:56,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:56,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-09-01 11:24:56,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:57,440 INFO L130 PetriNetUnfolder]: 987/1932 cut-off events. [2023-09-01 11:24:57,440 INFO L131 PetriNetUnfolder]: For 8382/8382 co-relation queries the response was YES. [2023-09-01 11:24:57,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9691 conditions, 1932 events. 987/1932 cut-off events. For 8382/8382 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11836 event pairs, 288 based on Foata normal form. 168/2100 useless extension candidates. Maximal degree in co-relation 9269. Up to 549 conditions per place. [2023-09-01 11:24:57,455 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 164 selfloop transitions, 51 changer transitions 3/218 dead transitions. [2023-09-01 11:24:57,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 218 transitions, 2360 flow [2023-09-01 11:24:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:24:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:24:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2054 transitions. [2023-09-01 11:24:57,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42263374485596705 [2023-09-01 11:24:57,459 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2054 transitions. [2023-09-01 11:24:57,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2054 transitions. [2023-09-01 11:24:57,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:57,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2054 transitions. [2023-09-01 11:24:57,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 136.93333333333334) internal successors, (2054), 15 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:57,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:57,470 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:57,470 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 563 flow. Second operand 15 states and 2054 transitions. [2023-09-01 11:24:57,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 218 transitions, 2360 flow [2023-09-01 11:24:57,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 218 transitions, 2259 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-09-01 11:24:57,487 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 1088 flow [2023-09-01 11:24:57,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1088, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2023-09-01 11:24:57,488 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-09-01 11:24:57,488 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 1088 flow [2023-09-01 11:24:57,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 133.13333333333333) internal successors, (1997), 15 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:57,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:57,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:57,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 11:24:57,694 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,SelfDestructingSolverStorable17 [2023-09-01 11:24:57,695 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:57,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:57,695 INFO L85 PathProgramCache]: Analyzing trace with hash -128575453, now seen corresponding path program 4 times [2023-09-01 11:24:57,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:57,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937038009] [2023-09-01 11:24:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:57,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:57,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:57,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937038009] [2023-09-01 11:24:57,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937038009] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:57,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687967250] [2023-09-01 11:24:57,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:24:57,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:57,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:57,799 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:57,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 11:24:57,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:24:57,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:24:57,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 11:24:57,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:57,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:24:58,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687967250] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:24:58,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:24:58,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-09-01 11:24:58,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741670132] [2023-09-01 11:24:58,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:24:58,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:24:58,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:58,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:24:58,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:24:58,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 324 [2023-09-01 11:24:58,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 1088 flow. Second operand has 13 states, 13 states have (on average 135.07692307692307) internal successors, (1756), 13 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:58,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:24:58,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 324 [2023-09-01 11:24:58,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:24:58,619 INFO L130 PetriNetUnfolder]: 705/1378 cut-off events. [2023-09-01 11:24:58,619 INFO L131 PetriNetUnfolder]: For 6998/6998 co-relation queries the response was YES. [2023-09-01 11:24:58,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7255 conditions, 1378 events. 705/1378 cut-off events. For 6998/6998 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7663 event pairs, 396 based on Foata normal form. 30/1408 useless extension candidates. Maximal degree in co-relation 6890. Up to 1103 conditions per place. [2023-09-01 11:24:58,629 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 71 selfloop transitions, 3 changer transitions 42/116 dead transitions. [2023-09-01 11:24:58,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 116 transitions, 1432 flow [2023-09-01 11:24:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:24:58,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:24:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 834 transitions. [2023-09-01 11:24:58,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42901234567901236 [2023-09-01 11:24:58,633 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 834 transitions. [2023-09-01 11:24:58,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 834 transitions. [2023-09-01 11:24:58,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:24:58,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 834 transitions. [2023-09-01 11:24:58,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.0) internal successors, (834), 6 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:58,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:58,643 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:58,643 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 1088 flow. Second operand 6 states and 834 transitions. [2023-09-01 11:24:58,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 116 transitions, 1432 flow [2023-09-01 11:24:58,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 116 transitions, 1393 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-09-01 11:24:58,660 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 746 flow [2023-09-01 11:24:58,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=746, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2023-09-01 11:24:58,661 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-09-01 11:24:58,661 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 746 flow [2023-09-01 11:24:58,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 135.07692307692307) internal successors, (1756), 13 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:24:58,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:24:58,662 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:24:58,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 11:24:58,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:58,868 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:24:58,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:24:58,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2055837313, now seen corresponding path program 5 times [2023-09-01 11:24:58,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:24:58,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915339083] [2023-09-01 11:24:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:24:58,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:24:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:24:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:24:59,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:24:59,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915339083] [2023-09-01 11:24:59,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915339083] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:24:59,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865722565] [2023-09-01 11:24:59,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:24:59,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:24:59,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:24:59,053 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:24:59,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 11:24:59,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:24:59,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:24:59,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:24:59,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:24:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:24:59,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:24:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:24:59,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865722565] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:24:59,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:24:59,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2023-09-01 11:24:59,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631541725] [2023-09-01 11:24:59,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:24:59,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 11:24:59,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:24:59,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 11:24:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-09-01 11:25:00,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 324 [2023-09-01 11:25:00,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 746 flow. Second operand has 17 states, 17 states have (on average 127.82352941176471) internal successors, (2173), 17 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:00,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:00,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 324 [2023-09-01 11:25:00,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:01,195 INFO L130 PetriNetUnfolder]: 675/1291 cut-off events. [2023-09-01 11:25:01,196 INFO L131 PetriNetUnfolder]: For 6858/6858 co-relation queries the response was YES. [2023-09-01 11:25:01,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6764 conditions, 1291 events. 675/1291 cut-off events. For 6858/6858 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6996 event pairs, 40 based on Foata normal form. 43/1334 useless extension candidates. Maximal degree in co-relation 6716. Up to 351 conditions per place. [2023-09-01 11:25:01,206 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 128 selfloop transitions, 60 changer transitions 22/210 dead transitions. [2023-09-01 11:25:01,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 210 transitions, 2209 flow [2023-09-01 11:25:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:25:01,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:25:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2895 transitions. [2023-09-01 11:25:01,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40614478114478114 [2023-09-01 11:25:01,211 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2895 transitions. [2023-09-01 11:25:01,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2895 transitions. [2023-09-01 11:25:01,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:01,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2895 transitions. [2023-09-01 11:25:01,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 131.5909090909091) internal successors, (2895), 22 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:01,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:01,226 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:01,226 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 746 flow. Second operand 22 states and 2895 transitions. [2023-09-01 11:25:01,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 210 transitions, 2209 flow [2023-09-01 11:25:01,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 210 transitions, 2107 flow, removed 48 selfloop flow, removed 8 redundant places. [2023-09-01 11:25:01,246 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 1201 flow [2023-09-01 11:25:01,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1201, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2023-09-01 11:25:01,247 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-09-01 11:25:01,248 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 1201 flow [2023-09-01 11:25:01,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 127.82352941176471) internal successors, (2173), 17 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:01,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:01,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:01,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:01,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:01,455 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:01,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:01,455 INFO L85 PathProgramCache]: Analyzing trace with hash -7138628, now seen corresponding path program 6 times [2023-09-01 11:25:01,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:01,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350002666] [2023-09-01 11:25:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:01,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:25:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350002666] [2023-09-01 11:25:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350002666] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157310094] [2023-09-01 11:25:01,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:25:01,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:01,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:01,564 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:01,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 11:25:01,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:25:01,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:25:01,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 11:25:01,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:25:01,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:25:01,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157310094] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:01,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:01,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-09-01 11:25:01,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786147732] [2023-09-01 11:25:01,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:01,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 11:25:01,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:01,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 11:25:01,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-09-01 11:25:02,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 324 [2023-09-01 11:25:02,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 1201 flow. Second operand has 15 states, 15 states have (on average 134.73333333333332) internal successors, (2021), 15 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:02,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:02,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 324 [2023-09-01 11:25:02,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:02,316 INFO L130 PetriNetUnfolder]: 503/945 cut-off events. [2023-09-01 11:25:02,316 INFO L131 PetriNetUnfolder]: For 6496/6496 co-relation queries the response was YES. [2023-09-01 11:25:02,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5523 conditions, 945 events. 503/945 cut-off events. For 6496/6496 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4502 event pairs, 142 based on Foata normal form. 15/960 useless extension candidates. Maximal degree in co-relation 5470. Up to 777 conditions per place. [2023-09-01 11:25:02,324 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 76 selfloop transitions, 13 changer transitions 27/116 dead transitions. [2023-09-01 11:25:02,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 116 transitions, 1473 flow [2023-09-01 11:25:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:25:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:25:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1099 transitions. [2023-09-01 11:25:02,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42399691358024694 [2023-09-01 11:25:02,327 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1099 transitions. [2023-09-01 11:25:02,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1099 transitions. [2023-09-01 11:25:02,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:02,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1099 transitions. [2023-09-01 11:25:02,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 137.375) internal successors, (1099), 8 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:02,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:02,332 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:02,332 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 1201 flow. Second operand 8 states and 1099 transitions. [2023-09-01 11:25:02,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 116 transitions, 1473 flow [2023-09-01 11:25:02,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 116 transitions, 1405 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-09-01 11:25:02,350 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 861 flow [2023-09-01 11:25:02,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2023-09-01 11:25:02,351 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-09-01 11:25:02,351 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 861 flow [2023-09-01 11:25:02,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 134.73333333333332) internal successors, (2021), 15 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:02,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:02,352 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:02,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:02,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:02,558 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:02,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash 943532550, now seen corresponding path program 7 times [2023-09-01 11:25:02,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:02,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446827993] [2023-09-01 11:25:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:02,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:03,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:03,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446827993] [2023-09-01 11:25:03,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446827993] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:03,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971839227] [2023-09-01 11:25:03,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:25:03,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:03,361 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:03,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 11:25:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:03,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 11:25:03,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:03,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:04,107 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:25:04,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:25:04,152 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:25:04,152 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 60 [2023-09-01 11:25:04,173 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:25:04,173 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 20 treesize of output 4 [2023-09-01 11:25:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:04,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971839227] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:04,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:04,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-09-01 11:25:04,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127744286] [2023-09-01 11:25:04,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:04,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 11:25:04,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:04,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 11:25:04,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2023-09-01 11:25:06,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-09-01 11:25:06,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 861 flow. Second operand has 32 states, 32 states have (on average 115.875) internal successors, (3708), 32 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:06,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:06,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-09-01 11:25:06,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:07,564 INFO L130 PetriNetUnfolder]: 510/938 cut-off events. [2023-09-01 11:25:07,564 INFO L131 PetriNetUnfolder]: For 6783/6783 co-relation queries the response was YES. [2023-09-01 11:25:07,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 938 events. 510/938 cut-off events. For 6783/6783 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4511 event pairs, 113 based on Foata normal form. 12/950 useless extension candidates. Maximal degree in co-relation 5266. Up to 770 conditions per place. [2023-09-01 11:25:07,572 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 90 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2023-09-01 11:25:07,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 119 transitions, 1352 flow [2023-09-01 11:25:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:25:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:25:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1544 transitions. [2023-09-01 11:25:07,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36657169990503324 [2023-09-01 11:25:07,575 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1544 transitions. [2023-09-01 11:25:07,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1544 transitions. [2023-09-01 11:25:07,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:07,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1544 transitions. [2023-09-01 11:25:07,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 118.76923076923077) internal successors, (1544), 13 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:07,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:07,582 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:07,582 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 861 flow. Second operand 13 states and 1544 transitions. [2023-09-01 11:25:07,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 119 transitions, 1352 flow [2023-09-01 11:25:07,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 1298 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-09-01 11:25:07,601 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 1021 flow [2023-09-01 11:25:07,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1021, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2023-09-01 11:25:07,601 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-09-01 11:25:07,602 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 1021 flow [2023-09-01 11:25:07,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 115.875) internal successors, (3708), 32 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:07,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:07,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:07,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:07,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 11:25:07,809 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:07,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:07,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2133215393, now seen corresponding path program 1 times [2023-09-01 11:25:07,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:07,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205025754] [2023-09-01 11:25:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:07,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:08,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:08,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205025754] [2023-09-01 11:25:08,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205025754] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:08,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655092236] [2023-09-01 11:25:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:08,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:08,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:08,237 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:08,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 11:25:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:08,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 11:25:08,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:08,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:08,627 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:25:08,627 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 60 [2023-09-01 11:25:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:08,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655092236] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:08,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:08,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2023-09-01 11:25:08,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451936927] [2023-09-01 11:25:08,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:08,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:25:08,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:25:08,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:25:09,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-09-01 11:25:09,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 1021 flow. Second operand has 19 states, 19 states have (on average 132.6315789473684) internal successors, (2520), 19 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:09,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:09,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-09-01 11:25:09,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:09,998 INFO L130 PetriNetUnfolder]: 517/968 cut-off events. [2023-09-01 11:25:09,998 INFO L131 PetriNetUnfolder]: For 8043/8043 co-relation queries the response was YES. [2023-09-01 11:25:10,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5852 conditions, 968 events. 517/968 cut-off events. For 8043/8043 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4787 event pairs, 119 based on Foata normal form. 8/976 useless extension candidates. Maximal degree in co-relation 5797. Up to 722 conditions per place. [2023-09-01 11:25:10,006 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 101 selfloop transitions, 28 changer transitions 19/148 dead transitions. [2023-09-01 11:25:10,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 148 transitions, 1654 flow [2023-09-01 11:25:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:25:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:25:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1649 transitions. [2023-09-01 11:25:10,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42412551440329216 [2023-09-01 11:25:10,010 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1649 transitions. [2023-09-01 11:25:10,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1649 transitions. [2023-09-01 11:25:10,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:10,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1649 transitions. [2023-09-01 11:25:10,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 137.41666666666666) internal successors, (1649), 12 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:10,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:10,016 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:10,016 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 1021 flow. Second operand 12 states and 1649 transitions. [2023-09-01 11:25:10,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 148 transitions, 1654 flow [2023-09-01 11:25:10,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 148 transitions, 1577 flow, removed 16 selfloop flow, removed 9 redundant places. [2023-09-01 11:25:10,037 INFO L231 Difference]: Finished difference. Result has 107 places, 98 transitions, 1048 flow [2023-09-01 11:25:10,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1048, PETRI_PLACES=107, PETRI_TRANSITIONS=98} [2023-09-01 11:25:10,037 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 86 predicate places. [2023-09-01 11:25:10,037 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 98 transitions, 1048 flow [2023-09-01 11:25:10,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 132.6315789473684) internal successors, (2520), 19 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:10,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:10,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:10,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:10,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:10,245 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:10,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:10,245 INFO L85 PathProgramCache]: Analyzing trace with hash -88608933, now seen corresponding path program 2 times [2023-09-01 11:25:10,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:10,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876509940] [2023-09-01 11:25:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:10,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:10,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:10,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876509940] [2023-09-01 11:25:10,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876509940] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:10,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103309558] [2023-09-01 11:25:10,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:25:10,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:10,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:10,605 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:10,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 11:25:10,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:25:10,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:25:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 11:25:10,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:10,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:10,979 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:25:10,979 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 60 [2023-09-01 11:25:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:11,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103309558] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:11,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:11,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2023-09-01 11:25:11,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979524218] [2023-09-01 11:25:11,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:11,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:25:11,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:11,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:25:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:25:11,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-09-01 11:25:11,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 98 transitions, 1048 flow. Second operand has 20 states, 20 states have (on average 132.4) internal successors, (2648), 20 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:11,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:11,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-09-01 11:25:11,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:12,367 INFO L130 PetriNetUnfolder]: 539/992 cut-off events. [2023-09-01 11:25:12,367 INFO L131 PetriNetUnfolder]: For 8718/8718 co-relation queries the response was YES. [2023-09-01 11:25:12,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6069 conditions, 992 events. 539/992 cut-off events. For 8718/8718 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4865 event pairs, 109 based on Foata normal form. 12/1004 useless extension candidates. Maximal degree in co-relation 6013. Up to 716 conditions per place. [2023-09-01 11:25:12,377 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 102 selfloop transitions, 43 changer transitions 2/147 dead transitions. [2023-09-01 11:25:12,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1768 flow [2023-09-01 11:25:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:25:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:25:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1779 transitions. [2023-09-01 11:25:12,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42236467236467234 [2023-09-01 11:25:12,382 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1779 transitions. [2023-09-01 11:25:12,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1779 transitions. [2023-09-01 11:25:12,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:12,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1779 transitions. [2023-09-01 11:25:12,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 136.84615384615384) internal successors, (1779), 13 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:12,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:12,388 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:12,388 INFO L175 Difference]: Start difference. First operand has 107 places, 98 transitions, 1048 flow. Second operand 13 states and 1779 transitions. [2023-09-01 11:25:12,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1768 flow [2023-09-01 11:25:12,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 1705 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-09-01 11:25:12,410 INFO L231 Difference]: Finished difference. Result has 117 places, 110 transitions, 1262 flow [2023-09-01 11:25:12,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1262, PETRI_PLACES=117, PETRI_TRANSITIONS=110} [2023-09-01 11:25:12,410 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2023-09-01 11:25:12,411 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 110 transitions, 1262 flow [2023-09-01 11:25:12,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 132.4) internal successors, (2648), 20 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:12,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:12,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:12,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:12,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:12,618 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:12,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:12,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1583523661, now seen corresponding path program 3 times [2023-09-01 11:25:12,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:12,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028057107] [2023-09-01 11:25:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:12,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:13,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:13,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028057107] [2023-09-01 11:25:13,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028057107] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:13,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093543425] [2023-09-01 11:25:13,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:25:13,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:13,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:13,025 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:13,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 11:25:13,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:25:13,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:25:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 11:25:13,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:13,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 11:25:13,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:25:13,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:25:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:25:13,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:13,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:25:13,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 80 [2023-09-01 11:25:13,702 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:25:13,703 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 1804 treesize of output 1564 [2023-09-01 11:25:13,745 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:25:13,745 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:25:13,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:25:13,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 748 treesize of output 572 [2023-09-01 11:25:13,789 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:25:13,791 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:25:13,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:25:13,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 524 treesize of output 460 [2023-09-01 11:25:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:25:15,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093543425] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:15,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:15,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2023-09-01 11:25:15,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83427070] [2023-09-01 11:25:15,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:15,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 11:25:15,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:15,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 11:25:15,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=429, Unknown=8, NotChecked=0, Total=552 [2023-09-01 11:25:15,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 324 [2023-09-01 11:25:15,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 110 transitions, 1262 flow. Second operand has 24 states, 24 states have (on average 93.95833333333333) internal successors, (2255), 24 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:15,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:15,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 324 [2023-09-01 11:25:15,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:16,563 INFO L130 PetriNetUnfolder]: 585/1101 cut-off events. [2023-09-01 11:25:16,563 INFO L131 PetriNetUnfolder]: For 11783/11783 co-relation queries the response was YES. [2023-09-01 11:25:16,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7084 conditions, 1101 events. 585/1101 cut-off events. For 11783/11783 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5662 event pairs, 127 based on Foata normal form. 12/1113 useless extension candidates. Maximal degree in co-relation 7023. Up to 832 conditions per place. [2023-09-01 11:25:16,569 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 112 selfloop transitions, 43 changer transitions 23/178 dead transitions. [2023-09-01 11:25:16,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 178 transitions, 2142 flow [2023-09-01 11:25:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:25:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:25:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1866 transitions. [2023-09-01 11:25:16,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3031189083820663 [2023-09-01 11:25:16,571 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1866 transitions. [2023-09-01 11:25:16,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1866 transitions. [2023-09-01 11:25:16,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:16,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1866 transitions. [2023-09-01 11:25:16,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 98.21052631578948) internal successors, (1866), 19 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) [2023-09-01 11:25:16,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:16,578 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:16,579 INFO L175 Difference]: Start difference. First operand has 117 places, 110 transitions, 1262 flow. Second operand 19 states and 1866 transitions. [2023-09-01 11:25:16,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 178 transitions, 2142 flow [2023-09-01 11:25:16,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 178 transitions, 2048 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-09-01 11:25:16,608 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1412 flow [2023-09-01 11:25:16,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1412, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-09-01 11:25:16,608 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-09-01 11:25:16,609 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1412 flow [2023-09-01 11:25:16,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 93.95833333333333) internal successors, (2255), 24 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:16,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:16,609 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:16,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:16,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:16,816 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:16,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:16,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1313030174, now seen corresponding path program 8 times [2023-09-01 11:25:16,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:16,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288675993] [2023-09-01 11:25:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:16,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:17,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:17,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288675993] [2023-09-01 11:25:17,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288675993] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:17,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48141661] [2023-09-01 11:25:17,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:25:17,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:17,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:17,417 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:17,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 11:25:17,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:25:17,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:25:17,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 11:25:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:17,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:18,064 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:25:18,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:25:18,099 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:25:18,099 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 60 [2023-09-01 11:25:18,115 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:25:18,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:25:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:18,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48141661] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:18,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:18,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-09-01 11:25:18,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063787338] [2023-09-01 11:25:18,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:18,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 11:25:18,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:18,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 11:25:18,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 11:25:20,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-09-01 11:25:20,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1412 flow. Second operand has 33 states, 33 states have (on average 115.6969696969697) internal successors, (3818), 33 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) [2023-09-01 11:25:20,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:20,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-09-01 11:25:20,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:21,379 INFO L130 PetriNetUnfolder]: 565/1054 cut-off events. [2023-09-01 11:25:21,379 INFO L131 PetriNetUnfolder]: For 11383/11383 co-relation queries the response was YES. [2023-09-01 11:25:21,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6927 conditions, 1054 events. 565/1054 cut-off events. For 11383/11383 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5266 event pairs, 147 based on Foata normal form. 2/1056 useless extension candidates. Maximal degree in co-relation 6857. Up to 973 conditions per place. [2023-09-01 11:25:21,389 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 100 selfloop transitions, 27 changer transitions 2/129 dead transitions. [2023-09-01 11:25:21,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 129 transitions, 1750 flow [2023-09-01 11:25:21,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:25:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:25:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1651 transitions. [2023-09-01 11:25:21,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36397707231040566 [2023-09-01 11:25:21,392 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1651 transitions. [2023-09-01 11:25:21,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1651 transitions. [2023-09-01 11:25:21,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:21,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1651 transitions. [2023-09-01 11:25:21,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 117.92857142857143) internal successors, (1651), 14 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:21,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:21,398 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:21,398 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1412 flow. Second operand 14 states and 1651 transitions. [2023-09-01 11:25:21,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 129 transitions, 1750 flow [2023-09-01 11:25:21,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 129 transitions, 1679 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-09-01 11:25:21,428 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1401 flow [2023-09-01 11:25:21,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1401, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-09-01 11:25:21,428 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-09-01 11:25:21,428 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1401 flow [2023-09-01 11:25:21,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 115.6969696969697) internal successors, (3818), 33 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) [2023-09-01 11:25:21,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:21,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:21,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:21,636 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,SelfDestructingSolverStorable25 [2023-09-01 11:25:21,636 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:21,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:21,636 INFO L85 PathProgramCache]: Analyzing trace with hash 456534228, now seen corresponding path program 9 times [2023-09-01 11:25:21,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:21,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201742794] [2023-09-01 11:25:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:21,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:22,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:22,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201742794] [2023-09-01 11:25:22,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201742794] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:22,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604209249] [2023-09-01 11:25:22,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:25:22,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:22,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:22,173 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:22,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 11:25:22,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 11:25:22,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:25:22,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 11:25:22,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:22,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:23,000 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:25:23,000 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 60 [2023-09-01 11:25:23,024 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:25:23,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:25:23,032 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:25:23,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:25:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:23,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604209249] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:23,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:23,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2023-09-01 11:25:23,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418674759] [2023-09-01 11:25:23,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:23,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 11:25:23,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 11:25:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-09-01 11:25:25,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-09-01 11:25:25,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1401 flow. Second operand has 28 states, 28 states have (on average 115.60714285714286) internal successors, (3237), 28 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:25,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:25,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-09-01 11:25:25,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:26,036 INFO L130 PetriNetUnfolder]: 588/1099 cut-off events. [2023-09-01 11:25:26,036 INFO L131 PetriNetUnfolder]: For 13894/13894 co-relation queries the response was YES. [2023-09-01 11:25:26,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7380 conditions, 1099 events. 588/1099 cut-off events. For 13894/13894 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5570 event pairs, 139 based on Foata normal form. 24/1123 useless extension candidates. Maximal degree in co-relation 7310. Up to 955 conditions per place. [2023-09-01 11:25:26,045 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 116 selfloop transitions, 37 changer transitions 5/158 dead transitions. [2023-09-01 11:25:26,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 158 transitions, 2061 flow [2023-09-01 11:25:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:25:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:25:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2019 transitions. [2023-09-01 11:25:26,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36655773420479304 [2023-09-01 11:25:26,057 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2019 transitions. [2023-09-01 11:25:26,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2019 transitions. [2023-09-01 11:25:26,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:26,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2019 transitions. [2023-09-01 11:25:26,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 118.76470588235294) internal successors, (2019), 17 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:26,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:26,064 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:26,064 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1401 flow. Second operand 17 states and 2019 transitions. [2023-09-01 11:25:26,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 158 transitions, 2061 flow [2023-09-01 11:25:26,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 158 transitions, 1997 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-09-01 11:25:26,099 INFO L231 Difference]: Finished difference. Result has 139 places, 121 transitions, 1509 flow [2023-09-01 11:25:26,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1509, PETRI_PLACES=139, PETRI_TRANSITIONS=121} [2023-09-01 11:25:26,100 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 118 predicate places. [2023-09-01 11:25:26,100 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 121 transitions, 1509 flow [2023-09-01 11:25:26,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 115.60714285714286) internal successors, (3237), 28 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:26,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:26,101 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:26,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:26,307 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,SelfDestructingSolverStorable26 [2023-09-01 11:25:26,307 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:26,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1392949847, now seen corresponding path program 4 times [2023-09-01 11:25:26,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:26,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345340249] [2023-09-01 11:25:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:26,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:26,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:26,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345340249] [2023-09-01 11:25:26,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345340249] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:26,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986258491] [2023-09-01 11:25:26,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:25:26,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:26,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:26,647 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:26,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 11:25:26,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:25:26,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:25:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 11:25:26,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:26,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:27,011 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:25:27,011 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 40 treesize of output 56 [2023-09-01 11:25:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:27,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986258491] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:27,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:27,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 17 [2023-09-01 11:25:27,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792515549] [2023-09-01 11:25:27,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:27,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 11:25:27,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:27,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 11:25:27,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-09-01 11:25:27,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-09-01 11:25:27,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 121 transitions, 1509 flow. Second operand has 18 states, 18 states have (on average 132.77777777777777) internal successors, (2390), 18 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:27,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:27,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-09-01 11:25:27,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:28,357 INFO L130 PetriNetUnfolder]: 632/1178 cut-off events. [2023-09-01 11:25:28,357 INFO L131 PetriNetUnfolder]: For 17245/17245 co-relation queries the response was YES. [2023-09-01 11:25:28,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8310 conditions, 1178 events. 632/1178 cut-off events. For 17245/17245 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6085 event pairs, 94 based on Foata normal form. 8/1186 useless extension candidates. Maximal degree in co-relation 8239. Up to 704 conditions per place. [2023-09-01 11:25:28,367 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 125 selfloop transitions, 52 changer transitions 3/180 dead transitions. [2023-09-01 11:25:28,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 180 transitions, 2468 flow [2023-09-01 11:25:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:25:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:25:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1923 transitions. [2023-09-01 11:25:28,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42394179894179895 [2023-09-01 11:25:28,371 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1923 transitions. [2023-09-01 11:25:28,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1923 transitions. [2023-09-01 11:25:28,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:28,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1923 transitions. [2023-09-01 11:25:28,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 137.35714285714286) internal successors, (1923), 14 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:28,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:28,378 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:28,378 INFO L175 Difference]: Start difference. First operand has 139 places, 121 transitions, 1509 flow. Second operand 14 states and 1923 transitions. [2023-09-01 11:25:28,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 180 transitions, 2468 flow [2023-09-01 11:25:28,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 180 transitions, 2372 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-09-01 11:25:28,420 INFO L231 Difference]: Finished difference. Result has 143 places, 126 transitions, 1612 flow [2023-09-01 11:25:28,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1612, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2023-09-01 11:25:28,421 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-09-01 11:25:28,421 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 1612 flow [2023-09-01 11:25:28,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 132.77777777777777) internal successors, (2390), 18 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:28,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:28,422 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:28,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:28,627 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,SelfDestructingSolverStorable27 [2023-09-01 11:25:28,628 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:28,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:28,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1043539718, now seen corresponding path program 10 times [2023-09-01 11:25:28,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:28,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049212372] [2023-09-01 11:25:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:28,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:29,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049212372] [2023-09-01 11:25:29,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049212372] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299776800] [2023-09-01 11:25:29,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:25:29,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:29,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:29,189 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:29,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 11:25:29,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:25:29,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:25:29,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 11:25:29,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:29,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:29,676 INFO L321 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-09-01 11:25:29,677 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 47 treesize of output 67 [2023-09-01 11:25:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:29,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299776800] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:29,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:29,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-09-01 11:25:29,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025545798] [2023-09-01 11:25:29,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:29,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 11:25:29,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:29,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 11:25:29,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:25:31,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-09-01 11:25:31,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 1612 flow. Second operand has 24 states, 24 states have (on average 114.16666666666667) internal successors, (2740), 24 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:31,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:31,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-09-01 11:25:31,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:32,080 INFO L130 PetriNetUnfolder]: 641/1206 cut-off events. [2023-09-01 11:25:32,080 INFO L131 PetriNetUnfolder]: For 18735/18735 co-relation queries the response was YES. [2023-09-01 11:25:32,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8653 conditions, 1206 events. 641/1206 cut-off events. For 18735/18735 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6332 event pairs, 114 based on Foata normal form. 4/1210 useless extension candidates. Maximal degree in co-relation 8579. Up to 769 conditions per place. [2023-09-01 11:25:32,089 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 121 selfloop transitions, 52 changer transitions 16/189 dead transitions. [2023-09-01 11:25:32,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 189 transitions, 2534 flow [2023-09-01 11:25:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 11:25:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 11:25:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2118 transitions. [2023-09-01 11:25:32,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3631687242798354 [2023-09-01 11:25:32,103 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2118 transitions. [2023-09-01 11:25:32,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2118 transitions. [2023-09-01 11:25:32,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:32,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2118 transitions. [2023-09-01 11:25:32,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 117.66666666666667) internal successors, (2118), 18 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:32,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:32,110 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:32,110 INFO L175 Difference]: Start difference. First operand has 143 places, 126 transitions, 1612 flow. Second operand 18 states and 2118 transitions. [2023-09-01 11:25:32,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 189 transitions, 2534 flow [2023-09-01 11:25:32,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 189 transitions, 2447 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-09-01 11:25:32,156 INFO L231 Difference]: Finished difference. Result has 158 places, 134 transitions, 1805 flow [2023-09-01 11:25:32,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1805, PETRI_PLACES=158, PETRI_TRANSITIONS=134} [2023-09-01 11:25:32,158 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2023-09-01 11:25:32,159 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 134 transitions, 1805 flow [2023-09-01 11:25:32,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 114.16666666666667) internal successors, (2740), 24 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:32,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:32,159 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:32,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:32,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:32,366 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:32,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:32,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2045874430, now seen corresponding path program 11 times [2023-09-01 11:25:32,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:32,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923056936] [2023-09-01 11:25:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:32,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:32,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:32,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923056936] [2023-09-01 11:25:32,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923056936] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:32,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829331163] [2023-09-01 11:25:32,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:25:32,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:32,933 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:32,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 11:25:33,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:25:33,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:25:33,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 11:25:33,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:33,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:33,469 INFO L321 Elim1Store]: treesize reduction 35, result has 80.9 percent of original size [2023-09-01 11:25:33,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 173 [2023-09-01 11:25:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 11:25:33,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829331163] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:33,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:33,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-09-01 11:25:33,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766350913] [2023-09-01 11:25:33,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:33,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 11:25:33,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 11:25:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:25:35,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-09-01 11:25:35,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 134 transitions, 1805 flow. Second operand has 24 states, 24 states have (on average 116.16666666666667) internal successors, (2788), 24 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:35,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:35,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-09-01 11:25:35,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:35,881 INFO L130 PetriNetUnfolder]: 637/1193 cut-off events. [2023-09-01 11:25:35,881 INFO L131 PetriNetUnfolder]: For 21843/21843 co-relation queries the response was YES. [2023-09-01 11:25:35,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9097 conditions, 1193 events. 637/1193 cut-off events. For 21843/21843 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6229 event pairs, 152 based on Foata normal form. 4/1197 useless extension candidates. Maximal degree in co-relation 9015. Up to 914 conditions per place. [2023-09-01 11:25:35,890 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 109 selfloop transitions, 50 changer transitions 7/166 dead transitions. [2023-09-01 11:25:35,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 166 transitions, 2387 flow [2023-09-01 11:25:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:25:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:25:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2024 transitions. [2023-09-01 11:25:35,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674655047204067 [2023-09-01 11:25:35,894 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2024 transitions. [2023-09-01 11:25:35,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2024 transitions. [2023-09-01 11:25:35,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:35,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2024 transitions. [2023-09-01 11:25:35,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 119.05882352941177) internal successors, (2024), 17 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:35,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:35,901 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:35,901 INFO L175 Difference]: Start difference. First operand has 158 places, 134 transitions, 1805 flow. Second operand 17 states and 2024 transitions. [2023-09-01 11:25:35,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 166 transitions, 2387 flow [2023-09-01 11:25:35,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 2253 flow, removed 45 selfloop flow, removed 9 redundant places. [2023-09-01 11:25:35,955 INFO L231 Difference]: Finished difference. Result has 166 places, 136 transitions, 1843 flow [2023-09-01 11:25:35,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1843, PETRI_PLACES=166, PETRI_TRANSITIONS=136} [2023-09-01 11:25:35,956 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2023-09-01 11:25:35,956 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 136 transitions, 1843 flow [2023-09-01 11:25:35,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 116.16666666666667) internal successors, (2788), 24 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:35,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:35,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:35,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:36,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:36,163 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:36,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash -962381630, now seen corresponding path program 12 times [2023-09-01 11:25:36,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:36,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519820722] [2023-09-01 11:25:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:36,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:36,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:36,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519820722] [2023-09-01 11:25:36,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519820722] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:36,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856460433] [2023-09-01 11:25:36,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:25:36,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:36,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:36,672 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:36,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 11:25:36,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:25:36,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:25:36,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 11:25:36,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:37,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:37,396 INFO L321 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-09-01 11:25:37,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 220 [2023-09-01 11:25:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 11:25:42,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856460433] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:42,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:42,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-09-01 11:25:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27715939] [2023-09-01 11:25:42,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:42,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 11:25:42,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:42,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 11:25:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:25:43,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-09-01 11:25:43,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 136 transitions, 1843 flow. Second operand has 24 states, 24 states have (on average 116.25) internal successors, (2790), 24 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) [2023-09-01 11:25:43,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:43,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-09-01 11:25:43,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:44,227 INFO L130 PetriNetUnfolder]: 681/1281 cut-off events. [2023-09-01 11:25:44,227 INFO L131 PetriNetUnfolder]: For 26071/26071 co-relation queries the response was YES. [2023-09-01 11:25:44,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9743 conditions, 1281 events. 681/1281 cut-off events. For 26071/26071 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6833 event pairs, 133 based on Foata normal form. 48/1329 useless extension candidates. Maximal degree in co-relation 9658. Up to 906 conditions per place. [2023-09-01 11:25:44,234 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 129 selfloop transitions, 66 changer transitions 12/207 dead transitions. [2023-09-01 11:25:44,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 207 transitions, 2873 flow [2023-09-01 11:25:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:25:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:25:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2640 transitions. [2023-09-01 11:25:44,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-09-01 11:25:44,237 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2640 transitions. [2023-09-01 11:25:44,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2640 transitions. [2023-09-01 11:25:44,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:44,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2640 transitions. [2023-09-01 11:25:44,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 120.0) internal successors, (2640), 22 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:44,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:44,246 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:44,246 INFO L175 Difference]: Start difference. First operand has 166 places, 136 transitions, 1843 flow. Second operand 22 states and 2640 transitions. [2023-09-01 11:25:44,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 207 transitions, 2873 flow [2023-09-01 11:25:44,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 207 transitions, 2769 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-09-01 11:25:44,303 INFO L231 Difference]: Finished difference. Result has 176 places, 144 transitions, 2063 flow [2023-09-01 11:25:44,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2063, PETRI_PLACES=176, PETRI_TRANSITIONS=144} [2023-09-01 11:25:44,303 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2023-09-01 11:25:44,303 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 144 transitions, 2063 flow [2023-09-01 11:25:44,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 116.25) internal successors, (2790), 24 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) [2023-09-01 11:25:44,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:44,304 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:44,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:44,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-09-01 11:25:44,505 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:44,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:44,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1900475021, now seen corresponding path program 5 times [2023-09-01 11:25:44,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:44,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219042365] [2023-09-01 11:25:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:44,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:44,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219042365] [2023-09-01 11:25:44,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219042365] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:44,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975891720] [2023-09-01 11:25:44,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:25:44,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:44,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:44,831 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:44,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 11:25:44,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 11:25:44,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:25:44,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 11:25:44,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:45,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:45,205 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:25:45,205 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 60 [2023-09-01 11:25:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:45,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975891720] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:45,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:45,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 15 [2023-09-01 11:25:45,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52779622] [2023-09-01 11:25:45,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:45,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 11:25:45,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:45,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 11:25:45,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-09-01 11:25:45,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-09-01 11:25:45,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 144 transitions, 2063 flow. Second operand has 16 states, 16 states have (on average 132.4375) internal successors, (2119), 16 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:45,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:45,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-09-01 11:25:45,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:46,364 INFO L130 PetriNetUnfolder]: 775/1447 cut-off events. [2023-09-01 11:25:46,364 INFO L131 PetriNetUnfolder]: For 36374/36374 co-relation queries the response was YES. [2023-09-01 11:25:46,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 1447 events. 775/1447 cut-off events. For 36374/36374 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7900 event pairs, 106 based on Foata normal form. 32/1479 useless extension candidates. Maximal degree in co-relation 11722. Up to 922 conditions per place. [2023-09-01 11:25:46,373 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 177 selfloop transitions, 49 changer transitions 1/227 dead transitions. [2023-09-01 11:25:46,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 3627 flow [2023-09-01 11:25:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:25:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:25:46,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2318 transitions. [2023-09-01 11:25:46,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42084241103848946 [2023-09-01 11:25:46,375 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2318 transitions. [2023-09-01 11:25:46,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2318 transitions. [2023-09-01 11:25:46,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:46,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2318 transitions. [2023-09-01 11:25:46,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 136.35294117647058) internal successors, (2318), 17 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:46,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:46,382 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:46,382 INFO L175 Difference]: Start difference. First operand has 176 places, 144 transitions, 2063 flow. Second operand 17 states and 2318 transitions. [2023-09-01 11:25:46,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 3627 flow [2023-09-01 11:25:46,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 227 transitions, 3485 flow, removed 30 selfloop flow, removed 15 redundant places. [2023-09-01 11:25:46,464 INFO L231 Difference]: Finished difference. Result has 183 places, 163 transitions, 2288 flow [2023-09-01 11:25:46,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2288, PETRI_PLACES=183, PETRI_TRANSITIONS=163} [2023-09-01 11:25:46,465 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2023-09-01 11:25:46,465 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 163 transitions, 2288 flow [2023-09-01 11:25:46,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 132.4375) internal successors, (2119), 16 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:46,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:46,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:46,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:46,666 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,SelfDestructingSolverStorable31 [2023-09-01 11:25:46,666 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:46,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:46,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1115989726, now seen corresponding path program 13 times [2023-09-01 11:25:46,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:46,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023020518] [2023-09-01 11:25:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:46,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:47,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:47,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023020518] [2023-09-01 11:25:47,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023020518] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:47,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028750650] [2023-09-01 11:25:47,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:25:47,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:47,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:47,200 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:47,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 11:25:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:47,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 11:25:47,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:47,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:47,724 INFO L321 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-09-01 11:25:47,725 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 49 treesize of output 86 [2023-09-01 11:25:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:25:47,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028750650] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:47,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:47,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-09-01 11:25:47,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866034439] [2023-09-01 11:25:47,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:47,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 11:25:47,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:47,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 11:25:47,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2023-09-01 11:25:50,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 324 [2023-09-01 11:25:50,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 163 transitions, 2288 flow. Second operand has 32 states, 32 states have (on average 114.75) internal successors, (3672), 32 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:50,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:25:50,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 324 [2023-09-01 11:25:50,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:25:50,726 INFO L130 PetriNetUnfolder]: 776/1457 cut-off events. [2023-09-01 11:25:50,727 INFO L131 PetriNetUnfolder]: For 36803/36803 co-relation queries the response was YES. [2023-09-01 11:25:50,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12087 conditions, 1457 events. 776/1457 cut-off events. For 36803/36803 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8031 event pairs, 190 based on Foata normal form. 2/1459 useless extension candidates. Maximal degree in co-relation 11993. Up to 1391 conditions per place. [2023-09-01 11:25:50,737 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 147 selfloop transitions, 19 changer transitions 13/179 dead transitions. [2023-09-01 11:25:50,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 179 transitions, 2814 flow [2023-09-01 11:25:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:25:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:25:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1514 transitions. [2023-09-01 11:25:50,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944919278252613 [2023-09-01 11:25:50,742 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1514 transitions. [2023-09-01 11:25:50,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1514 transitions. [2023-09-01 11:25:50,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:25:50,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1514 transitions. [2023-09-01 11:25:50,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 116.46153846153847) internal successors, (1514), 13 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:50,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:50,747 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:50,747 INFO L175 Difference]: Start difference. First operand has 183 places, 163 transitions, 2288 flow. Second operand 13 states and 1514 transitions. [2023-09-01 11:25:50,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 179 transitions, 2814 flow [2023-09-01 11:25:50,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 179 transitions, 2655 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-09-01 11:25:50,830 INFO L231 Difference]: Finished difference. Result has 188 places, 163 transitions, 2201 flow [2023-09-01 11:25:50,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2201, PETRI_PLACES=188, PETRI_TRANSITIONS=163} [2023-09-01 11:25:50,831 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2023-09-01 11:25:50,831 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 163 transitions, 2201 flow [2023-09-01 11:25:50,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 114.75) internal successors, (3672), 32 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:25:50,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:25:50,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:25:50,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 11:25:51,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:51,032 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:25:51,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:25:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash 966105765, now seen corresponding path program 6 times [2023-09-01 11:25:51,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:25:51,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173276978] [2023-09-01 11:25:51,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:25:51,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:25:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:25:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:25:51,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:25:51,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173276978] [2023-09-01 11:25:51,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173276978] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:25:51,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360321152] [2023-09-01 11:25:51,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:25:51,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:25:51,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:25:51,356 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:25:51,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 11:25:51,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 11:25:51,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:25:51,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 11:25:51,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:25:51,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:25:51,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:25:51,529 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 11:25:51,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 11:25:51,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-09-01 11:25:51,632 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:25:51,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-09-01 11:25:51,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:25:51,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:25:51,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:25:51,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:25:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:25:51,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:25:52,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:25:52,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 90 [2023-09-01 11:25:52,595 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:25:52,596 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 110572 treesize of output 101920 [2023-09-01 11:25:53,198 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:25:53,200 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:25:53,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:25:53,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 3164 treesize of output 3006 [2023-09-01 11:25:53,271 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:25:53,273 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:25:53,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:25:53,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2956 treesize of output 2590 [2023-09-01 11:25:53,356 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:25:53,358 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:25:53,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:25:53,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2540 treesize of output 1758 [2023-09-01 11:25:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:25:59,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360321152] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:25:59,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:25:59,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2023-09-01 11:25:59,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940474741] [2023-09-01 11:25:59,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:25:59,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 11:25:59,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:25:59,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 11:25:59,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=759, Unknown=18, NotChecked=0, Total=930 [2023-09-01 11:26:03,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:26:03,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 324 [2023-09-01 11:26:03,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 163 transitions, 2201 flow. Second operand has 31 states, 31 states have (on average 82.74193548387096) internal successors, (2565), 31 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:03,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:26:03,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 324 [2023-09-01 11:26:03,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:26:08,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:26:11,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:26:14,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:26:16,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:26:19,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:26:20,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:26:20,728 INFO L130 PetriNetUnfolder]: 1102/2131 cut-off events. [2023-09-01 11:26:20,728 INFO L131 PetriNetUnfolder]: For 67112/67112 co-relation queries the response was YES. [2023-09-01 11:26:20,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18044 conditions, 2131 events. 1102/2131 cut-off events. For 67112/67112 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12802 event pairs, 182 based on Foata normal form. 98/2229 useless extension candidates. Maximal degree in co-relation 17467. Up to 1347 conditions per place. [2023-09-01 11:26:20,742 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 278 selfloop transitions, 76 changer transitions 13/367 dead transitions. [2023-09-01 11:26:20,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 367 transitions, 5441 flow [2023-09-01 11:26:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 11:26:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 11:26:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3229 transitions. [2023-09-01 11:26:20,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2693526860193527 [2023-09-01 11:26:20,747 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3229 transitions. [2023-09-01 11:26:20,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3229 transitions. [2023-09-01 11:26:20,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:26:20,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3229 transitions. [2023-09-01 11:26:20,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 87.27027027027027) internal successors, (3229), 37 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:20,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 324.0) internal successors, (12312), 38 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:20,760 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 324.0) internal successors, (12312), 38 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:20,760 INFO L175 Difference]: Start difference. First operand has 188 places, 163 transitions, 2201 flow. Second operand 37 states and 3229 transitions. [2023-09-01 11:26:20,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 367 transitions, 5441 flow [2023-09-01 11:26:20,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 367 transitions, 5329 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-09-01 11:26:20,890 INFO L231 Difference]: Finished difference. Result has 228 places, 220 transitions, 3320 flow [2023-09-01 11:26:20,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3320, PETRI_PLACES=228, PETRI_TRANSITIONS=220} [2023-09-01 11:26:20,891 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2023-09-01 11:26:20,891 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 220 transitions, 3320 flow [2023-09-01 11:26:20,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 82.74193548387096) internal successors, (2565), 31 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:20,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:26:20,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:26:20,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 11:26:21,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:26:21,092 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:26:21,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:26:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1637860844, now seen corresponding path program 14 times [2023-09-01 11:26:21,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:26:21,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154491191] [2023-09-01 11:26:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:26:21,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:26:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:26:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:26:21,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:26:21,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154491191] [2023-09-01 11:26:21,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154491191] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:26:21,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315046648] [2023-09-01 11:26:21,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:26:21,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:26:21,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:26:21,570 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:26:21,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 11:26:21,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:26:21,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:26:21,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 11:26:21,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:26:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:26:21,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:26:22,090 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:26:22,090 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 47 treesize of output 80 [2023-09-01 11:26:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:26:22,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315046648] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:26:22,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:26:22,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-09-01 11:26:22,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587643049] [2023-09-01 11:26:22,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:26:22,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 11:26:22,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:26:22,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 11:26:22,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 11:26:24,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-09-01 11:26:24,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 220 transitions, 3320 flow. Second operand has 33 states, 33 states have (on average 113.6969696969697) internal successors, (3752), 33 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:24,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:26:24,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-09-01 11:26:24,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:26:25,250 INFO L130 PetriNetUnfolder]: 1088/2103 cut-off events. [2023-09-01 11:26:25,251 INFO L131 PetriNetUnfolder]: For 70834/70834 co-relation queries the response was YES. [2023-09-01 11:26:25,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18808 conditions, 2103 events. 1088/2103 cut-off events. For 70834/70834 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12596 event pairs, 340 based on Foata normal form. 4/2107 useless extension candidates. Maximal degree in co-relation 18325. Up to 1995 conditions per place. [2023-09-01 11:26:25,269 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 187 selfloop transitions, 41 changer transitions 3/231 dead transitions. [2023-09-01 11:26:25,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 231 transitions, 3895 flow [2023-09-01 11:26:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:26:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:26:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1499 transitions. [2023-09-01 11:26:25,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35588793922127254 [2023-09-01 11:26:25,271 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1499 transitions. [2023-09-01 11:26:25,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1499 transitions. [2023-09-01 11:26:25,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:26:25,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1499 transitions. [2023-09-01 11:26:25,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.3076923076923) internal successors, (1499), 13 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:25,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:25,277 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:25,277 INFO L175 Difference]: Start difference. First operand has 228 places, 220 transitions, 3320 flow. Second operand 13 states and 1499 transitions. [2023-09-01 11:26:25,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 231 transitions, 3895 flow [2023-09-01 11:26:25,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 231 transitions, 3515 flow, removed 163 selfloop flow, removed 6 redundant places. [2023-09-01 11:26:25,420 INFO L231 Difference]: Finished difference. Result has 234 places, 223 transitions, 3118 flow [2023-09-01 11:26:25,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3118, PETRI_PLACES=234, PETRI_TRANSITIONS=223} [2023-09-01 11:26:25,421 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2023-09-01 11:26:25,421 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 223 transitions, 3118 flow [2023-09-01 11:26:25,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 113.6969696969697) internal successors, (3752), 33 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:25,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:26:25,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:26:25,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 11:26:25,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:26:25,622 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:26:25,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:26:25,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1833946803, now seen corresponding path program 7 times [2023-09-01 11:26:25,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:26:25,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906385723] [2023-09-01 11:26:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:26:25,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:26:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:26:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:26:25,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:26:25,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906385723] [2023-09-01 11:26:25,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906385723] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:26:25,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718324352] [2023-09-01 11:26:25,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:26:25,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:26:25,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:26:25,953 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:26:25,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 11:26:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:26:26,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 11:26:26,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:26:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:26:26,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:26:26,383 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:26:26,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:26:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 11:26:26,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718324352] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:26:26,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:26:26,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 5] total 20 [2023-09-01 11:26:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171274445] [2023-09-01 11:26:26,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:26:26,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 11:26:26,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:26:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 11:26:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-09-01 11:26:27,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-09-01 11:26:27,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 223 transitions, 3118 flow. Second operand has 21 states, 21 states have (on average 128.47619047619048) internal successors, (2698), 21 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:27,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:26:27,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-09-01 11:26:27,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:26:28,265 INFO L130 PetriNetUnfolder]: 1144/2211 cut-off events. [2023-09-01 11:26:28,265 INFO L131 PetriNetUnfolder]: For 76116/76116 co-relation queries the response was YES. [2023-09-01 11:26:28,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18927 conditions, 2211 events. 1144/2211 cut-off events. For 76116/76116 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13329 event pairs, 284 based on Foata normal form. 28/2239 useless extension candidates. Maximal degree in co-relation 18813. Up to 1663 conditions per place. [2023-09-01 11:26:28,284 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 196 selfloop transitions, 91 changer transitions 7/294 dead transitions. [2023-09-01 11:26:28,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 294 transitions, 4721 flow [2023-09-01 11:26:28,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 11:26:28,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 11:26:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2633 transitions. [2023-09-01 11:26:28,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40632716049382717 [2023-09-01 11:26:28,287 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2633 transitions. [2023-09-01 11:26:28,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2633 transitions. [2023-09-01 11:26:28,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:26:28,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2633 transitions. [2023-09-01 11:26:28,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 131.65) internal successors, (2633), 20 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:28,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:28,294 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:28,294 INFO L175 Difference]: Start difference. First operand has 234 places, 223 transitions, 3118 flow. Second operand 20 states and 2633 transitions. [2023-09-01 11:26:28,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 294 transitions, 4721 flow [2023-09-01 11:26:28,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 294 transitions, 4561 flow, removed 45 selfloop flow, removed 10 redundant places. [2023-09-01 11:26:28,484 INFO L231 Difference]: Finished difference. Result has 242 places, 244 transitions, 3565 flow [2023-09-01 11:26:28,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3565, PETRI_PLACES=242, PETRI_TRANSITIONS=244} [2023-09-01 11:26:28,484 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 221 predicate places. [2023-09-01 11:26:28,485 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 244 transitions, 3565 flow [2023-09-01 11:26:28,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 128.47619047619048) internal successors, (2698), 21 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:28,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:26:28,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:26:28,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 11:26:28,686 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,SelfDestructingSolverStorable35 [2023-09-01 11:26:28,687 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:26:28,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:26:28,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1288803642, now seen corresponding path program 15 times [2023-09-01 11:26:28,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:26:28,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547129394] [2023-09-01 11:26:28,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:26:28,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:26:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:26:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:26:29,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:26:29,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547129394] [2023-09-01 11:26:29,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547129394] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:26:29,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080118046] [2023-09-01 11:26:29,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:26:29,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:26:29,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:26:29,237 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:26:29,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 11:26:29,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 11:26:29,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:26:29,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 11:26:29,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:26:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:26:29,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:26:29,909 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:26:29,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:26:29,926 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:26:29,927 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 20 treesize of output 4 [2023-09-01 11:26:29,933 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:26:29,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:26:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:26:30,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080118046] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:26:30,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:26:30,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-09-01 11:26:30,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787792145] [2023-09-01 11:26:30,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:26:30,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 11:26:30,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:26:30,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 11:26:30,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-09-01 11:26:32,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-09-01 11:26:32,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 244 transitions, 3565 flow. Second operand has 31 states, 31 states have (on average 113.58064516129032) internal successors, (3521), 31 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:32,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:26:32,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-09-01 11:26:32,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:26:32,846 INFO L130 PetriNetUnfolder]: 1128/2187 cut-off events. [2023-09-01 11:26:32,846 INFO L131 PetriNetUnfolder]: For 73206/73206 co-relation queries the response was YES. [2023-09-01 11:26:32,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18852 conditions, 2187 events. 1128/2187 cut-off events. For 73206/73206 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13155 event pairs, 314 based on Foata normal form. 24/2211 useless extension candidates. Maximal degree in co-relation 18738. Up to 1945 conditions per place. [2023-09-01 11:26:32,865 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 209 selfloop transitions, 59 changer transitions 1/269 dead transitions. [2023-09-01 11:26:32,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 269 transitions, 4364 flow [2023-09-01 11:26:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:26:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:26:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1746 transitions. [2023-09-01 11:26:32,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3592592592592593 [2023-09-01 11:26:32,867 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1746 transitions. [2023-09-01 11:26:32,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1746 transitions. [2023-09-01 11:26:32,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:26:32,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1746 transitions. [2023-09-01 11:26:32,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.4) internal successors, (1746), 15 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:32,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:32,873 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:32,873 INFO L175 Difference]: Start difference. First operand has 242 places, 244 transitions, 3565 flow. Second operand 15 states and 1746 transitions. [2023-09-01 11:26:32,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 269 transitions, 4364 flow [2023-09-01 11:26:33,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 269 transitions, 4092 flow, removed 82 selfloop flow, removed 12 redundant places. [2023-09-01 11:26:33,062 INFO L231 Difference]: Finished difference. Result has 245 places, 245 transitions, 3471 flow [2023-09-01 11:26:33,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3471, PETRI_PLACES=245, PETRI_TRANSITIONS=245} [2023-09-01 11:26:33,062 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2023-09-01 11:26:33,063 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 245 transitions, 3471 flow [2023-09-01 11:26:33,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 113.58064516129032) internal successors, (3521), 31 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:33,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:26:33,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:26:33,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 11:26:33,270 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,SelfDestructingSolverStorable36 [2023-09-01 11:26:33,270 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:26:33,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:26:33,270 INFO L85 PathProgramCache]: Analyzing trace with hash -432307696, now seen corresponding path program 16 times [2023-09-01 11:26:33,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:26:33,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320417391] [2023-09-01 11:26:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:26:33,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:26:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:26:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:26:33,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:26:33,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320417391] [2023-09-01 11:26:33,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320417391] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:26:33,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585038928] [2023-09-01 11:26:33,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:26:33,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:26:33,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:26:33,726 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:26:33,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 11:26:33,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:26:33,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:26:33,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 11:26:33,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:26:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:26:34,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:26:34,404 INFO L321 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-09-01 11:26:34,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 220 [2023-09-01 11:26:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 11:26:35,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585038928] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:26:35,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:26:35,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-09-01 11:26:35,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079982723] [2023-09-01 11:26:35,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:26:35,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 11:26:35,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:26:35,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 11:26:35,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:26:37,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-09-01 11:26:37,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 245 transitions, 3471 flow. Second operand has 24 states, 24 states have (on average 116.16666666666667) internal successors, (2788), 24 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:37,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:26:37,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-09-01 11:26:37,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:26:38,097 INFO L130 PetriNetUnfolder]: 1114/2153 cut-off events. [2023-09-01 11:26:38,097 INFO L131 PetriNetUnfolder]: For 67133/67133 co-relation queries the response was YES. [2023-09-01 11:26:38,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 2153 events. 1114/2153 cut-off events. For 67133/67133 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12885 event pairs, 262 based on Foata normal form. 16/2169 useless extension candidates. Maximal degree in co-relation 18390. Up to 1693 conditions per place. [2023-09-01 11:26:38,115 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 174 selfloop transitions, 87 changer transitions 8/269 dead transitions. [2023-09-01 11:26:38,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 269 transitions, 4196 flow [2023-09-01 11:26:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 11:26:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 11:26:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2126 transitions. [2023-09-01 11:26:38,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36454046639231824 [2023-09-01 11:26:38,118 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2126 transitions. [2023-09-01 11:26:38,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2126 transitions. [2023-09-01 11:26:38,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:26:38,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2126 transitions. [2023-09-01 11:26:38,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 118.11111111111111) internal successors, (2126), 18 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:38,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:38,123 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:38,124 INFO L175 Difference]: Start difference. First operand has 245 places, 245 transitions, 3471 flow. Second operand 18 states and 2126 transitions. [2023-09-01 11:26:38,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 269 transitions, 4196 flow [2023-09-01 11:26:38,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 269 transitions, 4062 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-09-01 11:26:38,312 INFO L231 Difference]: Finished difference. Result has 250 places, 242 transitions, 3489 flow [2023-09-01 11:26:38,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3489, PETRI_PLACES=250, PETRI_TRANSITIONS=242} [2023-09-01 11:26:38,313 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 229 predicate places. [2023-09-01 11:26:38,313 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 242 transitions, 3489 flow [2023-09-01 11:26:38,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 116.16666666666667) internal successors, (2788), 24 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:26:38,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:26:38,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:26:38,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 11:26:38,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 11:26:38,514 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:26:38,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:26:38,514 INFO L85 PathProgramCache]: Analyzing trace with hash 559278698, now seen corresponding path program 17 times [2023-09-01 11:26:38,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:26:38,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075430778] [2023-09-01 11:26:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:26:38,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:26:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:26:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:26:39,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:26:39,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075430778] [2023-09-01 11:26:39,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075430778] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:26:39,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856213059] [2023-09-01 11:26:39,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:26:39,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:26:39,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:26:39,177 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:26:39,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 11:26:39,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 11:26:39,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:26:39,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2023-09-01 11:26:39,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:26:39,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 11:26:39,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 11:26:39,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:26:39,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:26:39,768 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:26:39,768 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 23 treesize of output 25 [2023-09-01 11:26:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:26:39,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:26:40,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:26:40,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-09-01 11:26:40,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:26:40,277 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 110 treesize of output 86 [2023-09-01 11:26:40,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:26:40,288 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 74 treesize of output 55 [2023-09-01 11:26:40,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:26:40,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 90 [2023-09-01 11:26:40,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:26:40,353 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 3140 treesize of output 2996 [2023-09-01 11:26:40,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:26:40,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1560 treesize of output 1288 [2023-09-01 11:27:54,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:27:54,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 72617 treesize of output 48356 [2023-09-01 11:28:36,436 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 11:28:36,444 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 44635 treesize of output 37498 [2023-09-01 11:28:50,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:28:50,154 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:28:50,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58647 treesize of output 43215 [2023-09-01 11:28:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:28:54,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856213059] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:28:54,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:28:54,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 32 [2023-09-01 11:28:54,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9028090] [2023-09-01 11:28:54,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:28:54,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 11:28:54,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:28:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 11:28:54,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=939, Unknown=3, NotChecked=0, Total=1056 [2023-09-01 11:28:56,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 324 [2023-09-01 11:28:56,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 242 transitions, 3489 flow. Second operand has 33 states, 33 states have (on average 84.66666666666667) internal successors, (2794), 33 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:28:56,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:28:56,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 324 [2023-09-01 11:28:56,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:28:57,845 INFO L130 PetriNetUnfolder]: 1277/2424 cut-off events. [2023-09-01 11:28:57,845 INFO L131 PetriNetUnfolder]: For 83343/83343 co-relation queries the response was YES. [2023-09-01 11:28:57,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21208 conditions, 2424 events. 1277/2424 cut-off events. For 83343/83343 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14641 event pairs, 247 based on Foata normal form. 28/2452 useless extension candidates. Maximal degree in co-relation 21096. Up to 1717 conditions per place. [2023-09-01 11:28:57,866 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 256 selfloop transitions, 76 changer transitions 1/333 dead transitions. [2023-09-01 11:28:57,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 333 transitions, 5250 flow [2023-09-01 11:28:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 11:28:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 11:28:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1789 transitions. [2023-09-01 11:28:57,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27608024691358024 [2023-09-01 11:28:57,868 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1789 transitions. [2023-09-01 11:28:57,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1789 transitions. [2023-09-01 11:28:57,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:28:57,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1789 transitions. [2023-09-01 11:28:57,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 89.45) internal successors, (1789), 20 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:28:57,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:28:57,877 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:28:57,877 INFO L175 Difference]: Start difference. First operand has 250 places, 242 transitions, 3489 flow. Second operand 20 states and 1789 transitions. [2023-09-01 11:28:57,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 333 transitions, 5250 flow [2023-09-01 11:28:58,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 333 transitions, 5044 flow, removed 10 selfloop flow, removed 17 redundant places. [2023-09-01 11:28:58,031 INFO L231 Difference]: Finished difference. Result has 256 places, 262 transitions, 3863 flow [2023-09-01 11:28:58,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3863, PETRI_PLACES=256, PETRI_TRANSITIONS=262} [2023-09-01 11:28:58,031 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2023-09-01 11:28:58,031 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 262 transitions, 3863 flow [2023-09-01 11:28:58,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 84.66666666666667) internal successors, (2794), 33 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:28:58,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:28:58,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:28:58,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 11:28:58,237 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,SelfDestructingSolverStorable38 [2023-09-01 11:28:58,237 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:28:58,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:28:58,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1611664731, now seen corresponding path program 8 times [2023-09-01 11:28:58,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:28:58,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425716097] [2023-09-01 11:28:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:28:58,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:28:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:28:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:28:58,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:28:58,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425716097] [2023-09-01 11:28:58,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425716097] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:28:58,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787100853] [2023-09-01 11:28:58,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:28:58,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:28:58,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:28:58,606 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:28:58,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 11:28:58,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:28:58,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:28:58,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 11:28:58,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:28:58,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:28:58,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:28:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:28:59,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:28:59,084 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1579 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1579))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select .cse2 (+ .cse1 ~B~0.offset 4))))) (= (select .cse2 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|))))) is different from false [2023-09-01 11:28:59,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:28:59,115 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 178 [2023-09-01 11:28:59,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:28:59,134 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 88 treesize of output 89 [2023-09-01 11:28:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:28:59,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787100853] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:28:59,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:28:59,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2023-09-01 11:28:59,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829653715] [2023-09-01 11:28:59,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:28:59,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:28:59,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:28:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:28:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=481, Unknown=1, NotChecked=44, Total=600 [2023-09-01 11:28:59,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-09-01 11:28:59,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 262 transitions, 3863 flow. Second operand has 25 states, 25 states have (on average 109.92) internal successors, (2748), 25 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:28:59,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:28:59,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-09-01 11:28:59,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:29:06,428 WARN L222 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:29:09,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:29:10,189 INFO L130 PetriNetUnfolder]: 1290/2455 cut-off events. [2023-09-01 11:29:10,189 INFO L131 PetriNetUnfolder]: For 97214/97214 co-relation queries the response was YES. [2023-09-01 11:29:10,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22660 conditions, 2455 events. 1290/2455 cut-off events. For 97214/97214 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14920 event pairs, 313 based on Foata normal form. 4/2459 useless extension candidates. Maximal degree in co-relation 22542. Up to 2092 conditions per place. [2023-09-01 11:29:10,212 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 222 selfloop transitions, 71 changer transitions 13/306 dead transitions. [2023-09-01 11:29:10,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 306 transitions, 4888 flow [2023-09-01 11:29:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:29:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:29:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1488 transitions. [2023-09-01 11:29:10,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35327635327635326 [2023-09-01 11:29:10,214 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1488 transitions. [2023-09-01 11:29:10,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1488 transitions. [2023-09-01 11:29:10,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:29:10,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1488 transitions. [2023-09-01 11:29:10,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 114.46153846153847) internal successors, (1488), 13 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:10,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:10,219 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:10,219 INFO L175 Difference]: Start difference. First operand has 256 places, 262 transitions, 3863 flow. Second operand 13 states and 1488 transitions. [2023-09-01 11:29:10,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 306 transitions, 4888 flow [2023-09-01 11:29:10,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 306 transitions, 4636 flow, removed 88 selfloop flow, removed 10 redundant places. [2023-09-01 11:29:10,442 INFO L231 Difference]: Finished difference. Result has 259 places, 267 transitions, 3862 flow [2023-09-01 11:29:10,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3862, PETRI_PLACES=259, PETRI_TRANSITIONS=267} [2023-09-01 11:29:10,442 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 238 predicate places. [2023-09-01 11:29:10,442 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 267 transitions, 3862 flow [2023-09-01 11:29:10,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 109.92) internal successors, (2748), 25 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:10,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:29:10,443 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:29:10,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 11:29:10,643 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,SelfDestructingSolverStorable39 [2023-09-01 11:29:10,644 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:29:10,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:29:10,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1001465655, now seen corresponding path program 9 times [2023-09-01 11:29:10,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:29:10,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601708305] [2023-09-01 11:29:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:29:10,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:29:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:29:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:29:11,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:29:11,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601708305] [2023-09-01 11:29:11,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601708305] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:29:11,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767059835] [2023-09-01 11:29:11,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:29:11,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:29:11,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:29:11,081 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:29:11,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 11:29:11,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:29:11,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:29:11,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 11:29:11,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:29:11,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:29:11,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:29:11,417 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:29:11,417 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 21 treesize of output 26 [2023-09-01 11:29:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:29:11,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:29:11,500 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1626 (Array Int Int))) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1626)) (.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select (select .cse0 c_~B~0.base) (+ .cse1 4 c_~B~0.offset)))))) is different from false [2023-09-01 11:29:11,573 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-09-01 11:29:11,573 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 130 treesize of output 145 [2023-09-01 11:29:11,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:29:11,584 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 74 treesize of output 55 [2023-09-01 11:29:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:29:11,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767059835] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:29:11,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:29:11,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-09-01 11:29:11,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636513619] [2023-09-01 11:29:11,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:29:11,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 11:29:11,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:29:11,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 11:29:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=528, Unknown=1, NotChecked=46, Total=650 [2023-09-01 11:29:11,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 324 [2023-09-01 11:29:11,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 267 transitions, 3862 flow. Second operand has 26 states, 26 states have (on average 105.84615384615384) internal successors, (2752), 26 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:11,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:29:11,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 324 [2023-09-01 11:29:11,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:29:12,890 INFO L130 PetriNetUnfolder]: 1282/2442 cut-off events. [2023-09-01 11:29:12,891 INFO L131 PetriNetUnfolder]: For 91917/91917 co-relation queries the response was YES. [2023-09-01 11:29:12,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22353 conditions, 2442 events. 1282/2442 cut-off events. For 91917/91917 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14858 event pairs, 339 based on Foata normal form. 4/2446 useless extension candidates. Maximal degree in co-relation 22236. Up to 2092 conditions per place. [2023-09-01 11:29:12,911 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 225 selfloop transitions, 64 changer transitions 13/302 dead transitions. [2023-09-01 11:29:12,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 302 transitions, 4790 flow [2023-09-01 11:29:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:29:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:29:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1221 transitions. [2023-09-01 11:29:12,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3425925925925926 [2023-09-01 11:29:12,913 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1221 transitions. [2023-09-01 11:29:12,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1221 transitions. [2023-09-01 11:29:12,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:29:12,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1221 transitions. [2023-09-01 11:29:12,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:12,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 324.0) internal successors, (3888), 12 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:12,916 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 324.0) internal successors, (3888), 12 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:12,916 INFO L175 Difference]: Start difference. First operand has 259 places, 267 transitions, 3862 flow. Second operand 11 states and 1221 transitions. [2023-09-01 11:29:12,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 302 transitions, 4790 flow [2023-09-01 11:29:13,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 302 transitions, 4623 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-09-01 11:29:13,081 INFO L231 Difference]: Finished difference. Result has 257 places, 265 transitions, 3809 flow [2023-09-01 11:29:13,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3809, PETRI_PLACES=257, PETRI_TRANSITIONS=265} [2023-09-01 11:29:13,081 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2023-09-01 11:29:13,081 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 265 transitions, 3809 flow [2023-09-01 11:29:13,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 105.84615384615384) internal successors, (2752), 26 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:13,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:29:13,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:29:13,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 11:29:13,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:29:13,282 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:29:13,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:29:13,283 INFO L85 PathProgramCache]: Analyzing trace with hash 695500837, now seen corresponding path program 10 times [2023-09-01 11:29:13,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:29:13,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210422530] [2023-09-01 11:29:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:29:13,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:29:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:29:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:29:13,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:29:13,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210422530] [2023-09-01 11:29:13,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210422530] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:29:13,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722188247] [2023-09-01 11:29:13,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:29:13,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:29:13,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:29:13,627 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:29:13,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 11:29:13,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:29:13,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:29:13,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 11:29:13,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:29:13,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:29:13,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:29:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:29:13,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:29:14,050 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1673 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1673))) (let ((.cse0 (select .cse1 ~B~0.base))) (or (= (select .cse0 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|) (not (let ((.cse2 (* c_~i_BA~0 4))) (= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ .cse2 ~B~0.offset 4))))))))) is different from false [2023-09-01 11:29:14,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:29:14,081 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 178 [2023-09-01 11:29:14,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:29:14,099 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 88 treesize of output 89 [2023-09-01 11:29:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:29:14,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722188247] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:29:14,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:29:14,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-09-01 11:29:14,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541750467] [2023-09-01 11:29:14,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:29:14,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:29:14,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:29:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:29:14,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=480, Unknown=1, NotChecked=44, Total=600 [2023-09-01 11:29:14,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-09-01 11:29:14,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 265 transitions, 3809 flow. Second operand has 25 states, 25 states have (on average 110.08) internal successors, (2752), 25 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:14,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:29:14,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-09-01 11:29:14,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:29:17,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:29:23,903 INFO L130 PetriNetUnfolder]: 1270/2410 cut-off events. [2023-09-01 11:29:23,903 INFO L131 PetriNetUnfolder]: For 91455/91455 co-relation queries the response was YES. [2023-09-01 11:29:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22086 conditions, 2410 events. 1270/2410 cut-off events. For 91455/91455 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14563 event pairs, 328 based on Foata normal form. 4/2414 useless extension candidates. Maximal degree in co-relation 21981. Up to 2002 conditions per place. [2023-09-01 11:29:23,927 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 206 selfloop transitions, 90 changer transitions 3/299 dead transitions. [2023-09-01 11:29:23,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 299 transitions, 4844 flow [2023-09-01 11:29:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:29:23,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:29:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1703 transitions. [2023-09-01 11:29:23,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35041152263374487 [2023-09-01 11:29:23,929 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1703 transitions. [2023-09-01 11:29:23,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1703 transitions. [2023-09-01 11:29:23,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:29:23,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1703 transitions. [2023-09-01 11:29:23,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 113.53333333333333) internal successors, (1703), 15 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:23,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:23,935 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:23,936 INFO L175 Difference]: Start difference. First operand has 257 places, 265 transitions, 3809 flow. Second operand 15 states and 1703 transitions. [2023-09-01 11:29:23,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 299 transitions, 4844 flow [2023-09-01 11:29:24,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 299 transitions, 4714 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-09-01 11:29:24,113 INFO L231 Difference]: Finished difference. Result has 262 places, 267 transitions, 3930 flow [2023-09-01 11:29:24,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3681, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3930, PETRI_PLACES=262, PETRI_TRANSITIONS=267} [2023-09-01 11:29:24,114 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2023-09-01 11:29:24,114 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 267 transitions, 3930 flow [2023-09-01 11:29:24,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 110.08) internal successors, (2752), 25 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:24,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:29:24,115 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:29:24,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-09-01 11:29:24,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:29:24,317 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:29:24,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:29:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash 95734045, now seen corresponding path program 11 times [2023-09-01 11:29:24,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:29:24,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35312892] [2023-09-01 11:29:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:29:24,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:29:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:29:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:29:24,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:29:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35312892] [2023-09-01 11:29:24,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35312892] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:29:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283535802] [2023-09-01 11:29:24,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:29:24,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:29:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:29:24,705 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:29:24,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 11:29:24,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:29:24,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:29:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 11:29:24,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:29:25,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:29:25,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:29:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:29:25,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:29:25,157 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1720 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1720))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 4 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1 4))))) (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse0 (+ c_~B~0.offset (* c_~i_AB~0 4)))))))) is different from false [2023-09-01 11:29:25,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:29:25,187 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 178 [2023-09-01 11:29:25,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:29:25,205 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 88 treesize of output 89 [2023-09-01 11:29:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:29:25,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283535802] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:29:25,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:29:25,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 25 [2023-09-01 11:29:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810281223] [2023-09-01 11:29:25,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:29:25,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 11:29:25,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:29:25,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 11:29:25,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=520, Unknown=1, NotChecked=46, Total=650 [2023-09-01 11:29:25,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 324 [2023-09-01 11:29:25,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 267 transitions, 3930 flow. Second operand has 26 states, 26 states have (on average 99.88461538461539) internal successors, (2597), 26 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) [2023-09-01 11:29:25,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:29:25,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 324 [2023-09-01 11:29:25,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:29:31,133 INFO L130 PetriNetUnfolder]: 1268/2397 cut-off events. [2023-09-01 11:29:31,134 INFO L131 PetriNetUnfolder]: For 92629/92629 co-relation queries the response was YES. [2023-09-01 11:29:31,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22221 conditions, 2397 events. 1268/2397 cut-off events. For 92629/92629 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14361 event pairs, 336 based on Foata normal form. 8/2405 useless extension candidates. Maximal degree in co-relation 22104. Up to 2057 conditions per place. [2023-09-01 11:29:31,159 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 210 selfloop transitions, 85 changer transitions 15/310 dead transitions. [2023-09-01 11:29:31,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 310 transitions, 5049 flow [2023-09-01 11:29:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:29:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:29:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1752 transitions. [2023-09-01 11:29:31,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31808278867102396 [2023-09-01 11:29:31,161 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1752 transitions. [2023-09-01 11:29:31,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1752 transitions. [2023-09-01 11:29:31,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:29:31,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1752 transitions. [2023-09-01 11:29:31,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.05882352941177) internal successors, (1752), 17 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:31,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:31,168 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:31,168 INFO L175 Difference]: Start difference. First operand has 262 places, 267 transitions, 3930 flow. Second operand 17 states and 1752 transitions. [2023-09-01 11:29:31,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 310 transitions, 5049 flow [2023-09-01 11:29:31,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 310 transitions, 4827 flow, removed 17 selfloop flow, removed 12 redundant places. [2023-09-01 11:29:31,368 INFO L231 Difference]: Finished difference. Result has 267 places, 276 transitions, 4114 flow [2023-09-01 11:29:31,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4114, PETRI_PLACES=267, PETRI_TRANSITIONS=276} [2023-09-01 11:29:31,369 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2023-09-01 11:29:31,369 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 276 transitions, 4114 flow [2023-09-01 11:29:31,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 99.88461538461539) internal successors, (2597), 26 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) [2023-09-01 11:29:31,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:29:31,370 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:29:31,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-09-01 11:29:31,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:29:31,573 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:29:31,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:29:31,573 INFO L85 PathProgramCache]: Analyzing trace with hash -185131032, now seen corresponding path program 18 times [2023-09-01 11:29:31,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:29:31,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843057733] [2023-09-01 11:29:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:29:31,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:29:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:29:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:29:32,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:29:32,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843057733] [2023-09-01 11:29:32,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843057733] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:29:32,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719074665] [2023-09-01 11:29:32,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:29:32,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:29:32,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:29:32,114 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:29:32,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 11:29:32,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:29:32,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:29:32,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 11:29:32,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:29:32,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:29:32,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:29:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:29:32,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:29:33,104 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse4 (+ c_~i_BA~0 1)) (.cse5 (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767) ~B~0.base) (+ ~B~0.offset .cse3))))))) (and (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select .cse2 (+ .cse1 ~B~0.offset 4)))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse2 (+ ~B~0.offset .cse3)))))))) (or (< .cse4 c_~Bn~0) .cse5) (or (< .cse4 c_~An~0) .cse5)))) is different from false [2023-09-01 11:29:33,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:29:33,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 263 treesize of output 373 [2023-09-01 11:29:33,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:29:33,254 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 155 treesize of output 157 [2023-09-01 11:29:33,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 115 [2023-09-01 11:29:33,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 109 [2023-09-01 11:29:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:29:39,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719074665] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:29:39,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:29:39,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 26 [2023-09-01 11:29:39,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203076340] [2023-09-01 11:29:39,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:29:39,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 11:29:39,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:29:39,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 11:29:39,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2023-09-01 11:29:40,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-09-01 11:29:40,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 276 transitions, 4114 flow. Second operand has 27 states, 27 states have (on average 86.0) internal successors, (2322), 27 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:40,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:29:40,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-09-01 11:29:40,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:29:44,961 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (+ c_~i_BA~0 1)) (.cse6 (* c_~i_AB~0 4)) (.cse5 (* c_~i_BA~0 4))) (let ((.cse3 (+ c_~A~0.offset .cse5 4)) (.cse10 (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767) ~B~0.base) (+ ~B~0.offset .cse6)))))) (.cse11 (< .cse7 c_~An~0)) (.cse1 (select |c_#memory_int| c_~B~0.base)) (.cse0 (select |c_#memory_int| c_~A~0.base)) (.cse9 (< .cse7 c_~Bn~0)) (.cse12 (forall ((~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select |c_#memory_int| ~B~0.base) (+ ~B~0.offset .cse6))))))) (and (= (select .cse0 4) (select .cse1 (+ 4 c_~B~0.offset))) (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767))) (let ((.cse4 (select .cse2 ~B~0.base))) (or (= (select (select .cse2 c_~A~0.base) .cse3) (select .cse4 (+ .cse5 ~B~0.offset 4))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse4 (+ ~B~0.offset .cse6)))))))) (= c_~i_AB~0 .cse7) (< 1 c_~An~0) (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse8 (select |c_#memory_int| ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse8 (+ ~B~0.offset .cse6)))) (= (select .cse0 .cse3) (select .cse8 (+ .cse5 ~B~0.offset 4)))))) (or .cse9 .cse10) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) (= c_~i_BA~0 1) (or .cse11 .cse10) (= c_~B~0.offset 0) (or .cse11 .cse12) (<= .cse7 c_~An~0) (= c_~A~0.offset 0) (<= .cse7 c_~Bn~0) (= (select .cse1 .cse5) (select .cse0 .cse5)) (or .cse9 .cse12) (< 1 c_~Bn~0)))) is different from false [2023-09-01 11:29:53,486 WARN L222 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 60 DAG size of output: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:29:57,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:29:58,800 INFO L130 PetriNetUnfolder]: 1404/2687 cut-off events. [2023-09-01 11:29:58,800 INFO L131 PetriNetUnfolder]: For 110386/110386 co-relation queries the response was YES. [2023-09-01 11:29:58,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25108 conditions, 2687 events. 1404/2687 cut-off events. For 110386/110386 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16687 event pairs, 277 based on Foata normal form. 46/2733 useless extension candidates. Maximal degree in co-relation 24989. Up to 2135 conditions per place. [2023-09-01 11:29:58,826 INFO L137 encePairwiseOnDemand]: 311/324 looper letters, 257 selfloop transitions, 121 changer transitions 4/382 dead transitions. [2023-09-01 11:29:58,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 382 transitions, 6305 flow [2023-09-01 11:29:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 11:29:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 11:29:58,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2482 transitions. [2023-09-01 11:29:58,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2735890652557319 [2023-09-01 11:29:58,831 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2482 transitions. [2023-09-01 11:29:58,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2482 transitions. [2023-09-01 11:29:58,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:29:58,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2482 transitions. [2023-09-01 11:29:58,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 88.64285714285714) internal successors, (2482), 28 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:58,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 324.0) internal successors, (9396), 29 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:58,839 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 324.0) internal successors, (9396), 29 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:58,839 INFO L175 Difference]: Start difference. First operand has 267 places, 276 transitions, 4114 flow. Second operand 28 states and 2482 transitions. [2023-09-01 11:29:58,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 382 transitions, 6305 flow [2023-09-01 11:29:59,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 382 transitions, 5886 flow, removed 50 selfloop flow, removed 18 redundant places. [2023-09-01 11:29:59,067 INFO L231 Difference]: Finished difference. Result has 283 places, 319 transitions, 4920 flow [2023-09-01 11:29:59,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4920, PETRI_PLACES=283, PETRI_TRANSITIONS=319} [2023-09-01 11:29:59,067 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 262 predicate places. [2023-09-01 11:29:59,067 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 319 transitions, 4920 flow [2023-09-01 11:29:59,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 86.0) internal successors, (2322), 27 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:29:59,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:29:59,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:29:59,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 11:29:59,268 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,SelfDestructingSolverStorable43 [2023-09-01 11:29:59,268 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:29:59,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:29:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1268623832, now seen corresponding path program 19 times [2023-09-01 11:29:59,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:29:59,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631053123] [2023-09-01 11:29:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:29:59,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:29:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:29:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:29:59,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:29:59,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631053123] [2023-09-01 11:29:59,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631053123] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:29:59,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911032040] [2023-09-01 11:29:59,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:29:59,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:29:59,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:29:59,897 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:29:59,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 11:30:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:30:00,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:30:00,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:30:00,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:30:00,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:30:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:30:00,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:30:01,756 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~i_AB~0 4))) (let ((.cse4 (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1814 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1814) ~B~0.base) (+ ~B~0.offset .cse1)) |c_thread1Thread1of1ForFork1_#t~mem1|)))) (.cse5 (+ c_~i_BA~0 1))) (and (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1814 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1814))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (= (select .cse0 (+ ~B~0.offset .cse1)) |c_thread1Thread1of1ForFork1_#t~mem1|)) (let ((.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3 4)) (select .cse0 (+ .cse3 ~B~0.offset 4)))))))) (or .cse4 (< .cse5 c_~An~0)) (or .cse4 (< .cse5 c_~Bn~0))))) is different from false [2023-09-01 11:30:01,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:30:01,769 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 48 treesize of output 36 [2023-09-01 11:30:01,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 11:30:01,823 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-09-01 11:30:01,824 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 154 treesize of output 161 [2023-09-01 11:30:01,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:30:01,842 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 94 treesize of output 95 [2023-09-01 11:30:02,106 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:30:02,106 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 48 treesize of output 24 [2023-09-01 11:30:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:30:02,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911032040] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:30:02,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:30:02,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2023-09-01 11:30:02,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405474915] [2023-09-01 11:30:02,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:30:02,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 11:30:02,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:30:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 11:30:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1075, Unknown=1, NotChecked=66, Total=1260 [2023-09-01 11:30:02,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-09-01 11:30:02,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 319 transitions, 4920 flow. Second operand has 36 states, 36 states have (on average 85.55555555555556) internal successors, (3080), 36 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:02,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:30:02,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-09-01 11:30:02,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:30:07,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 11:30:09,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:30:10,879 INFO L130 PetriNetUnfolder]: 1395/2664 cut-off events. [2023-09-01 11:30:10,879 INFO L131 PetriNetUnfolder]: For 128036/128036 co-relation queries the response was YES. [2023-09-01 11:30:10,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26292 conditions, 2664 events. 1395/2664 cut-off events. For 128036/128036 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16408 event pairs, 332 based on Foata normal form. 2/2666 useless extension candidates. Maximal degree in co-relation 26168. Up to 2556 conditions per place. [2023-09-01 11:30:10,907 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 273 selfloop transitions, 53 changer transitions 3/329 dead transitions. [2023-09-01 11:30:10,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 329 transitions, 5642 flow [2023-09-01 11:30:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:30:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:30:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1313 transitions. [2023-09-01 11:30:10,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27016460905349793 [2023-09-01 11:30:10,909 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1313 transitions. [2023-09-01 11:30:10,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1313 transitions. [2023-09-01 11:30:10,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:30:10,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1313 transitions. [2023-09-01 11:30:10,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 87.53333333333333) internal successors, (1313), 15 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:10,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:10,915 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:10,915 INFO L175 Difference]: Start difference. First operand has 283 places, 319 transitions, 4920 flow. Second operand 15 states and 1313 transitions. [2023-09-01 11:30:10,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 329 transitions, 5642 flow [2023-09-01 11:30:11,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 329 transitions, 5527 flow, removed 14 selfloop flow, removed 13 redundant places. [2023-09-01 11:30:11,211 INFO L231 Difference]: Finished difference. Result has 284 places, 317 transitions, 4879 flow [2023-09-01 11:30:11,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4879, PETRI_PLACES=284, PETRI_TRANSITIONS=317} [2023-09-01 11:30:11,212 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 263 predicate places. [2023-09-01 11:30:11,212 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 317 transitions, 4879 flow [2023-09-01 11:30:11,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 85.55555555555556) internal successors, (3080), 36 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:11,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:30:11,213 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:30:11,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 11:30:11,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-09-01 11:30:11,417 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:30:11,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:30:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash 654676370, now seen corresponding path program 20 times [2023-09-01 11:30:11,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:30:11,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655652614] [2023-09-01 11:30:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:30:11,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:30:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:30:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:30:11,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:30:11,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655652614] [2023-09-01 11:30:11,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655652614] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:30:11,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059895815] [2023-09-01 11:30:11,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:30:11,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:11,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:30:11,517 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:30:11,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 11:30:11,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:30:11,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:30:11,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 11:30:11,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:30:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:30:11,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:30:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:30:11,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059895815] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:30:11,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:30:11,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-09-01 11:30:11,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576431087] [2023-09-01 11:30:11,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:30:11,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 11:30:11,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:30:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 11:30:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-09-01 11:30:11,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-09-01 11:30:11,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 317 transitions, 4879 flow. Second operand has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:11,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:30:11,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-09-01 11:30:11,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:30:12,690 INFO L130 PetriNetUnfolder]: 1757/3345 cut-off events. [2023-09-01 11:30:12,690 INFO L131 PetriNetUnfolder]: For 149049/149049 co-relation queries the response was YES. [2023-09-01 11:30:12,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32527 conditions, 3345 events. 1757/3345 cut-off events. For 149049/149049 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21679 event pairs, 288 based on Foata normal form. 5/3350 useless extension candidates. Maximal degree in co-relation 32403. Up to 2144 conditions per place. [2023-09-01 11:30:12,721 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 270 selfloop transitions, 126 changer transitions 2/398 dead transitions. [2023-09-01 11:30:12,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 398 transitions, 6888 flow [2023-09-01 11:30:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:30:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:30:12,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1543 transitions. [2023-09-01 11:30:12,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762345679012346 [2023-09-01 11:30:12,723 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1543 transitions. [2023-09-01 11:30:12,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1543 transitions. [2023-09-01 11:30:12,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:30:12,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1543 transitions. [2023-09-01 11:30:12,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 154.3) internal successors, (1543), 10 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:12,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:12,726 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:12,726 INFO L175 Difference]: Start difference. First operand has 284 places, 317 transitions, 4879 flow. Second operand 10 states and 1543 transitions. [2023-09-01 11:30:12,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 398 transitions, 6888 flow [2023-09-01 11:30:12,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 398 transitions, 6752 flow, removed 1 selfloop flow, removed 17 redundant places. [2023-09-01 11:30:12,984 INFO L231 Difference]: Finished difference. Result has 278 places, 345 transitions, 5648 flow [2023-09-01 11:30:12,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4743, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5648, PETRI_PLACES=278, PETRI_TRANSITIONS=345} [2023-09-01 11:30:12,985 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-09-01 11:30:12,985 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 345 transitions, 5648 flow [2023-09-01 11:30:12,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:12,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:30:12,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:30:12,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-09-01 11:30:13,186 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,SelfDestructingSolverStorable45 [2023-09-01 11:30:13,186 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:30:13,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:30:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1667538898, now seen corresponding path program 21 times [2023-09-01 11:30:13,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:30:13,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721858089] [2023-09-01 11:30:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:30:13,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:30:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:30:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:30:13,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:30:13,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721858089] [2023-09-01 11:30:13,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721858089] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:30:13,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285450299] [2023-09-01 11:30:13,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:30:13,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:13,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:30:13,297 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:30:13,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 11:30:13,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 11:30:13,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:30:13,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 11:30:13,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:30:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:30:13,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:30:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:30:14,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285450299] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:30:14,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:30:14,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 25 [2023-09-01 11:30:14,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798910300] [2023-09-01 11:30:14,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:30:14,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 11:30:14,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:30:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 11:30:14,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2023-09-01 11:30:16,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 324 [2023-09-01 11:30:16,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 345 transitions, 5648 flow. Second operand has 27 states, 27 states have (on average 127.33333333333333) internal successors, (3438), 27 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:16,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:30:16,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 324 [2023-09-01 11:30:16,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:30:17,811 INFO L130 PetriNetUnfolder]: 1983/3758 cut-off events. [2023-09-01 11:30:17,811 INFO L131 PetriNetUnfolder]: For 185809/185809 co-relation queries the response was YES. [2023-09-01 11:30:17,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38507 conditions, 3758 events. 1983/3758 cut-off events. For 185809/185809 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 24991 event pairs, 140 based on Foata normal form. 15/3773 useless extension candidates. Maximal degree in co-relation 38384. Up to 1359 conditions per place. [2023-09-01 11:30:17,849 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 278 selfloop transitions, 209 changer transitions 6/493 dead transitions. [2023-09-01 11:30:17,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 493 transitions, 9099 flow [2023-09-01 11:30:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:30:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:30:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2881 transitions. [2023-09-01 11:30:17,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041806958473625 [2023-09-01 11:30:17,851 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2881 transitions. [2023-09-01 11:30:17,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2881 transitions. [2023-09-01 11:30:17,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:30:17,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2881 transitions. [2023-09-01 11:30:17,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 130.95454545454547) internal successors, (2881), 22 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:17,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:17,856 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:17,857 INFO L175 Difference]: Start difference. First operand has 278 places, 345 transitions, 5648 flow. Second operand 22 states and 2881 transitions. [2023-09-01 11:30:17,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 493 transitions, 9099 flow [2023-09-01 11:30:18,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 493 transitions, 8667 flow, removed 197 selfloop flow, removed 2 redundant places. [2023-09-01 11:30:18,239 INFO L231 Difference]: Finished difference. Result has 305 places, 381 transitions, 6772 flow [2023-09-01 11:30:18,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=5384, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6772, PETRI_PLACES=305, PETRI_TRANSITIONS=381} [2023-09-01 11:30:18,240 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2023-09-01 11:30:18,240 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 381 transitions, 6772 flow [2023-09-01 11:30:18,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 127.33333333333333) internal successors, (3438), 27 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:18,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:30:18,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:30:18,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-09-01 11:30:18,441 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,SelfDestructingSolverStorable46 [2023-09-01 11:30:18,441 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:30:18,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:30:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1628592980, now seen corresponding path program 22 times [2023-09-01 11:30:18,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:30:18,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133296066] [2023-09-01 11:30:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:30:18,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:30:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:30:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:30:18,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:30:18,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133296066] [2023-09-01 11:30:18,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133296066] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:30:18,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320845747] [2023-09-01 11:30:18,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:30:18,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:18,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:30:18,550 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:30:18,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 11:30:18,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:30:18,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:30:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 11:30:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:30:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:30:18,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:30:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 11:30:18,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320845747] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:30:18,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:30:18,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 14 [2023-09-01 11:30:18,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549316673] [2023-09-01 11:30:18,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:30:18,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 11:30:18,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:30:18,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 11:30:18,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-09-01 11:30:19,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2023-09-01 11:30:19,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 381 transitions, 6772 flow. Second operand has 16 states, 16 states have (on average 140.5625) internal successors, (2249), 16 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:19,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:30:19,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2023-09-01 11:30:19,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:30:20,853 INFO L130 PetriNetUnfolder]: 2435/4633 cut-off events. [2023-09-01 11:30:20,853 INFO L131 PetriNetUnfolder]: For 258653/258653 co-relation queries the response was YES. [2023-09-01 11:30:20,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50257 conditions, 4633 events. 2435/4633 cut-off events. For 258653/258653 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32404 event pairs, 244 based on Foata normal form. 87/4720 useless extension candidates. Maximal degree in co-relation 50123. Up to 1727 conditions per place. [2023-09-01 11:30:20,902 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 326 selfloop transitions, 246 changer transitions 23/595 dead transitions. [2023-09-01 11:30:20,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 595 transitions, 11836 flow [2023-09-01 11:30:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 11:30:20,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 11:30:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3916 transitions. [2023-09-01 11:30:20,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476451760402378 [2023-09-01 11:30:20,908 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3916 transitions. [2023-09-01 11:30:20,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3916 transitions. [2023-09-01 11:30:20,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:30:20,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3916 transitions. [2023-09-01 11:30:20,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 145.03703703703704) internal successors, (3916), 27 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:20,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:20,915 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:20,915 INFO L175 Difference]: Start difference. First operand has 305 places, 381 transitions, 6772 flow. Second operand 27 states and 3916 transitions. [2023-09-01 11:30:20,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 595 transitions, 11836 flow [2023-09-01 11:30:21,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 595 transitions, 11250 flow, removed 238 selfloop flow, removed 11 redundant places. [2023-09-01 11:30:21,508 INFO L231 Difference]: Finished difference. Result has 332 places, 433 transitions, 8427 flow [2023-09-01 11:30:21,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6236, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8427, PETRI_PLACES=332, PETRI_TRANSITIONS=433} [2023-09-01 11:30:21,508 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 311 predicate places. [2023-09-01 11:30:21,509 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 433 transitions, 8427 flow [2023-09-01 11:30:21,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 140.5625) internal successors, (2249), 16 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:21,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:30:21,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:30:21,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 11:30:21,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:21,710 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:30:21,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:30:21,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1095367968, now seen corresponding path program 23 times [2023-09-01 11:30:21,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:30:21,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500642948] [2023-09-01 11:30:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:30:21,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:30:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:30:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:30:21,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:30:21,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500642948] [2023-09-01 11:30:21,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500642948] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:30:21,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050224879] [2023-09-01 11:30:21,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:30:21,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:21,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:30:21,833 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:30:21,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 11:30:22,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 11:30:22,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:30:22,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 11:30:22,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:30:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:30:22,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:30:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 11:30:22,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050224879] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:30:22,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:30:22,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-09-01 11:30:22,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722821482] [2023-09-01 11:30:22,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:30:22,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 11:30:22,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:30:22,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 11:30:22,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-09-01 11:30:22,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-09-01 11:30:22,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 433 transitions, 8427 flow. Second operand has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:22,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:30:22,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-09-01 11:30:22,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:30:23,875 INFO L130 PetriNetUnfolder]: 2785/5280 cut-off events. [2023-09-01 11:30:23,876 INFO L131 PetriNetUnfolder]: For 308911/308911 co-relation queries the response was YES. [2023-09-01 11:30:23,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59019 conditions, 5280 events. 2785/5280 cut-off events. For 308911/308911 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37727 event pairs, 619 based on Foata normal form. 6/5286 useless extension candidates. Maximal degree in co-relation 58876. Up to 3967 conditions per place. [2023-09-01 11:30:23,930 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 409 selfloop transitions, 122 changer transitions 6/537 dead transitions. [2023-09-01 11:30:23,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 537 transitions, 11704 flow [2023-09-01 11:30:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:30:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:30:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1533 transitions. [2023-09-01 11:30:23,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47314814814814815 [2023-09-01 11:30:23,932 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1533 transitions. [2023-09-01 11:30:23,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1533 transitions. [2023-09-01 11:30:23,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:30:23,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1533 transitions. [2023-09-01 11:30:23,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 153.3) internal successors, (1533), 10 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:23,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:23,935 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:23,935 INFO L175 Difference]: Start difference. First operand has 332 places, 433 transitions, 8427 flow. Second operand 10 states and 1533 transitions. [2023-09-01 11:30:23,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 537 transitions, 11704 flow [2023-09-01 11:30:24,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 537 transitions, 10633 flow, removed 503 selfloop flow, removed 8 redundant places. [2023-09-01 11:30:24,686 INFO L231 Difference]: Finished difference. Result has 334 places, 474 transitions, 9078 flow [2023-09-01 11:30:24,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7767, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9078, PETRI_PLACES=334, PETRI_TRANSITIONS=474} [2023-09-01 11:30:24,686 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 313 predicate places. [2023-09-01 11:30:24,688 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 474 transitions, 9078 flow [2023-09-01 11:30:24,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 149.3) internal successors, (1493), 10 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:24,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:30:24,689 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:30:24,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-09-01 11:30:24,889 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,SelfDestructingSolverStorable48 [2023-09-01 11:30:24,890 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:30:24,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:30:24,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1359474198, now seen corresponding path program 12 times [2023-09-01 11:30:24,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:30:24,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019792819] [2023-09-01 11:30:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:30:24,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:30:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:30:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:30:25,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:30:25,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019792819] [2023-09-01 11:30:25,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019792819] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:30:25,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492843050] [2023-09-01 11:30:25,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:30:25,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:25,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:30:25,009 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:30:25,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 11:30:25,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:30:25,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:30:25,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:30:25,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:30:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:30:25,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:30:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:30:25,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492843050] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:30:25,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:30:25,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 11:30:25,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728357691] [2023-09-01 11:30:25,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:30:25,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 11:30:25,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:30:25,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 11:30:25,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-09-01 11:30:25,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 324 [2023-09-01 11:30:25,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 474 transitions, 9078 flow. Second operand has 18 states, 18 states have (on average 134.61111111111111) internal successors, (2423), 18 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:25,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:30:25,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 324 [2023-09-01 11:30:25,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:30:27,255 INFO L130 PetriNetUnfolder]: 2799/5309 cut-off events. [2023-09-01 11:30:27,255 INFO L131 PetriNetUnfolder]: For 286182/286182 co-relation queries the response was YES. [2023-09-01 11:30:27,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57558 conditions, 5309 events. 2799/5309 cut-off events. For 286182/286182 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 37695 event pairs, 1361 based on Foata normal form. 83/5392 useless extension candidates. Maximal degree in co-relation 57414. Up to 4622 conditions per place. [2023-09-01 11:30:27,312 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 473 selfloop transitions, 19 changer transitions 61/553 dead transitions. [2023-09-01 11:30:27,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 553 transitions, 11544 flow [2023-09-01 11:30:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:30:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:30:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1107 transitions. [2023-09-01 11:30:27,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2023-09-01 11:30:27,314 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1107 transitions. [2023-09-01 11:30:27,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1107 transitions. [2023-09-01 11:30:27,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:30:27,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1107 transitions. [2023-09-01 11:30:27,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:27,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:27,316 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:27,316 INFO L175 Difference]: Start difference. First operand has 334 places, 474 transitions, 9078 flow. Second operand 8 states and 1107 transitions. [2023-09-01 11:30:27,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 553 transitions, 11544 flow [2023-09-01 11:30:28,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 553 transitions, 11226 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-09-01 11:30:28,059 INFO L231 Difference]: Finished difference. Result has 326 places, 446 transitions, 8510 flow [2023-09-01 11:30:28,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8407, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8510, PETRI_PLACES=326, PETRI_TRANSITIONS=446} [2023-09-01 11:30:28,060 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 305 predicate places. [2023-09-01 11:30:28,060 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 446 transitions, 8510 flow [2023-09-01 11:30:28,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 134.61111111111111) internal successors, (2423), 18 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:28,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:30:28,061 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:30:28,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-09-01 11:30:28,261 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,SelfDestructingSolverStorable49 [2023-09-01 11:30:28,261 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:30:28,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:30:28,262 INFO L85 PathProgramCache]: Analyzing trace with hash -493468489, now seen corresponding path program 13 times [2023-09-01 11:30:28,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:30:28,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303576431] [2023-09-01 11:30:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:30:28,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:30:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:30:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:30:28,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:30:28,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303576431] [2023-09-01 11:30:28,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303576431] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:30:28,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9308406] [2023-09-01 11:30:28,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:30:28,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:28,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:30:28,379 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:30:28,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-09-01 11:30:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:30:28,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:30:28,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:30:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:30:28,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:30:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:30:28,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9308406] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:30:28,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:30:28,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-09-01 11:30:28,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650336714] [2023-09-01 11:30:28,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:30:28,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:30:28,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:30:28,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:30:28,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:30:29,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 324 [2023-09-01 11:30:29,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 446 transitions, 8510 flow. Second operand has 20 states, 20 states have (on average 134.25) internal successors, (2685), 20 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:29,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:30:29,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 324 [2023-09-01 11:30:29,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:30:30,815 INFO L130 PetriNetUnfolder]: 3390/6561 cut-off events. [2023-09-01 11:30:30,816 INFO L131 PetriNetUnfolder]: For 335326/335326 co-relation queries the response was YES. [2023-09-01 11:30:30,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69339 conditions, 6561 events. 3390/6561 cut-off events. For 335326/335326 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 49001 event pairs, 829 based on Foata normal form. 163/6724 useless extension candidates. Maximal degree in co-relation 69197. Up to 4908 conditions per place. [2023-09-01 11:30:30,893 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 512 selfloop transitions, 62 changer transitions 68/642 dead transitions. [2023-09-01 11:30:30,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 642 transitions, 13364 flow [2023-09-01 11:30:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:30:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:30:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1376 transitions. [2023-09-01 11:30:30,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246913580246914 [2023-09-01 11:30:30,895 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1376 transitions. [2023-09-01 11:30:30,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1376 transitions. [2023-09-01 11:30:30,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:30:30,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1376 transitions. [2023-09-01 11:30:30,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 137.6) internal successors, (1376), 10 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:30,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:30,897 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:30,897 INFO L175 Difference]: Start difference. First operand has 326 places, 446 transitions, 8510 flow. Second operand 10 states and 1376 transitions. [2023-09-01 11:30:30,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 642 transitions, 13364 flow [2023-09-01 11:30:32,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 642 transitions, 13246 flow, removed 43 selfloop flow, removed 11 redundant places. [2023-09-01 11:30:32,257 INFO L231 Difference]: Finished difference. Result has 321 places, 485 transitions, 9665 flow [2023-09-01 11:30:32,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8430, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9665, PETRI_PLACES=321, PETRI_TRANSITIONS=485} [2023-09-01 11:30:32,258 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 300 predicate places. [2023-09-01 11:30:32,258 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 485 transitions, 9665 flow [2023-09-01 11:30:32,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 134.25) internal successors, (2685), 20 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:32,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:30:32,259 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:30:32,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-09-01 11:30:32,465 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,SelfDestructingSolverStorable50 [2023-09-01 11:30:32,465 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:30:32,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:30:32,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1159595898, now seen corresponding path program 24 times [2023-09-01 11:30:32,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:30:32,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686853676] [2023-09-01 11:30:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:30:32,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:30:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:30:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 11:30:32,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:30:32,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686853676] [2023-09-01 11:30:32,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686853676] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:30:32,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788225691] [2023-09-01 11:30:32,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:30:32,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:32,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:30:32,553 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:30:32,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-09-01 11:30:32,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:30:32,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:30:32,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:30:32,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:30:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 11:30:32,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:30:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 11:30:32,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788225691] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:30:32,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:30:32,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-09-01 11:30:32,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853102471] [2023-09-01 11:30:32,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:30:32,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 11:30:32,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:30:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 11:30:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-09-01 11:30:33,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-09-01 11:30:33,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 485 transitions, 9665 flow. Second operand has 21 states, 21 states have (on average 132.61904761904762) internal successors, (2785), 21 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:33,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:30:33,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-09-01 11:30:33,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:30:35,186 INFO L130 PetriNetUnfolder]: 2909/5610 cut-off events. [2023-09-01 11:30:35,187 INFO L131 PetriNetUnfolder]: For 274574/274574 co-relation queries the response was YES. [2023-09-01 11:30:35,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58804 conditions, 5610 events. 2909/5610 cut-off events. For 274574/274574 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 40067 event pairs, 650 based on Foata normal form. 86/5696 useless extension candidates. Maximal degree in co-relation 58667. Up to 4241 conditions per place. [2023-09-01 11:30:35,247 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 386 selfloop transitions, 42 changer transitions 258/686 dead transitions. [2023-09-01 11:30:35,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 686 transitions, 13562 flow [2023-09-01 11:30:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 11:30:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 11:30:35,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2847 transitions. [2023-09-01 11:30:35,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184303350970018 [2023-09-01 11:30:35,249 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2847 transitions. [2023-09-01 11:30:35,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2847 transitions. [2023-09-01 11:30:35,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:30:35,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2847 transitions. [2023-09-01 11:30:35,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 135.57142857142858) internal successors, (2847), 21 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:35,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:35,255 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:35,255 INFO L175 Difference]: Start difference. First operand has 321 places, 485 transitions, 9665 flow. Second operand 21 states and 2847 transitions. [2023-09-01 11:30:35,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 686 transitions, 13562 flow [2023-09-01 11:30:36,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 686 transitions, 13458 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-09-01 11:30:36,435 INFO L231 Difference]: Finished difference. Result has 342 places, 422 transitions, 8100 flow [2023-09-01 11:30:36,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=9445, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8100, PETRI_PLACES=342, PETRI_TRANSITIONS=422} [2023-09-01 11:30:36,436 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 321 predicate places. [2023-09-01 11:30:36,436 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 422 transitions, 8100 flow [2023-09-01 11:30:36,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 132.61904761904762) internal successors, (2785), 21 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:36,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:30:36,436 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:30:36,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-09-01 11:30:36,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:36,637 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:30:36,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:30:36,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1198980961, now seen corresponding path program 14 times [2023-09-01 11:30:36,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:30:36,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266110691] [2023-09-01 11:30:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:30:36,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:30:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:30:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:30:37,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:30:37,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266110691] [2023-09-01 11:30:37,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266110691] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:30:37,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837834370] [2023-09-01 11:30:37,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:30:37,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:37,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:30:37,253 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:30:37,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-09-01 11:30:37,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:30:37,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:30:37,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 11:30:37,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:30:37,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:30:37,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:30:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:30:38,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:30:38,374 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~i_AB~0 4))) (let ((.cse0 (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_2195 (Array Int Int))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2195) ~B~0.base) (+ ~B~0.offset .cse5)))))) (.cse1 (+ c_~i_BA~0 1))) (and (or .cse0 (< .cse1 c_~An~0)) (or .cse0 (< .cse1 c_~Bn~0)) (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_2195 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2195))) (let ((.cse4 (select .cse2 ~B~0.base))) (or (let ((.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3 4)) (select .cse4 (+ .cse3 ~B~0.offset 4)))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse4 (+ ~B~0.offset .cse5))))))))))) is different from false [2023-09-01 11:30:38,428 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-09-01 11:30:38,429 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 154 treesize of output 161 [2023-09-01 11:30:38,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:30:38,451 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 94 treesize of output 95 [2023-09-01 11:30:38,755 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:30:38,755 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 48 treesize of output 24 [2023-09-01 11:30:38,767 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:30:38,768 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 48 treesize of output 24 [2023-09-01 11:30:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:30:39,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837834370] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:30:39,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:30:39,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 42 [2023-09-01 11:30:39,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204451277] [2023-09-01 11:30:39,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:30:39,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 11:30:39,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:30:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 11:30:39,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1543, Unknown=1, NotChecked=80, Total=1806 [2023-09-01 11:30:39,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-09-01 11:30:39,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 422 transitions, 8100 flow. Second operand has 43 states, 43 states have (on average 85.55813953488372) internal successors, (3679), 43 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:39,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:30:39,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-09-01 11:30:39,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:30:41,497 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse8 (* c_~i_BA~0 4)) (.cse2 (+ c_~i_BA~0 1)) (.cse6 (* c_~i_AB~0 4))) (let ((.cse9 (+ c_~i_BA~0 2)) (.cse3 (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_2195 (Array Int Int))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2195) ~B~0.base) (+ ~B~0.offset .cse6)))))) (.cse4 (< .cse2 c_~An~0)) (.cse1 (select |c_#memory_int| c_~B~0.base)) (.cse0 (select |c_#memory_int| c_~A~0.base)) (.cse7 (+ c_~A~0.offset .cse8 4)) (.cse10 (< .cse2 c_~Bn~0)) (.cse11 (forall ((~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select |c_#memory_int| ~B~0.base) (+ ~B~0.offset .cse6))))))) (and (= (select .cse0 4) (select .cse1 (+ 4 c_~B~0.offset))) (= c_~i_AB~0 .cse2) (or .cse3 .cse4) (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse5 (select |c_#memory_int| ~B~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse5 (+ ~B~0.offset .cse6)))) (= (select .cse0 .cse7) (select .cse5 (+ .cse8 ~B~0.offset 4)))))) (<= .cse9 c_~Bn~0) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~A~0.base)) .cse4 (= c_~i_BA~0 1) (<= .cse9 c_~An~0) (<= 3 c_~An~0) (or .cse3 .cse10) .cse10 (= c_~B~0.offset 0) (or .cse4 .cse11) (= c_~A~0.offset 0) (= (select .cse1 .cse8) (select .cse0 .cse8)) (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_2195 (Array Int Int))) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2195))) (let ((.cse13 (select .cse12 ~B~0.base))) (or (= (select (select .cse12 c_~A~0.base) .cse7) (select .cse13 (+ .cse8 ~B~0.offset 4))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse13 (+ ~B~0.offset .cse6)))))))) (or .cse10 .cse11) (<= 3 c_~Bn~0)))) is different from false [2023-09-01 11:30:48,277 WARN L222 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 60 DAG size of output: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:30:49,890 INFO L130 PetriNetUnfolder]: 2524/4753 cut-off events. [2023-09-01 11:30:49,891 INFO L131 PetriNetUnfolder]: For 243639/243639 co-relation queries the response was YES. [2023-09-01 11:30:49,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50458 conditions, 4753 events. 2524/4753 cut-off events. For 243639/243639 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 33061 event pairs, 576 based on Foata normal form. 10/4763 useless extension candidates. Maximal degree in co-relation 50313. Up to 4265 conditions per place. [2023-09-01 11:30:49,957 INFO L137 encePairwiseOnDemand]: 310/324 looper letters, 385 selfloop transitions, 97 changer transitions 4/486 dead transitions. [2023-09-01 11:30:49,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 486 transitions, 9964 flow [2023-09-01 11:30:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 11:30:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 11:30:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2633 transitions. [2023-09-01 11:30:49,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2708847736625514 [2023-09-01 11:30:49,960 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2633 transitions. [2023-09-01 11:30:49,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2633 transitions. [2023-09-01 11:30:49,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:30:49,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2633 transitions. [2023-09-01 11:30:49,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 87.76666666666667) internal successors, (2633), 30 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:49,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 324.0) internal successors, (10044), 31 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:49,969 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 324.0) internal successors, (10044), 31 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:49,969 INFO L175 Difference]: Start difference. First operand has 342 places, 422 transitions, 8100 flow. Second operand 30 states and 2633 transitions. [2023-09-01 11:30:49,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 486 transitions, 9964 flow [2023-09-01 11:30:50,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 486 transitions, 9710 flow, removed 82 selfloop flow, removed 22 redundant places. [2023-09-01 11:30:50,595 INFO L231 Difference]: Finished difference. Result has 330 places, 427 transitions, 8209 flow [2023-09-01 11:30:50,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7854, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8209, PETRI_PLACES=330, PETRI_TRANSITIONS=427} [2023-09-01 11:30:50,596 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 309 predicate places. [2023-09-01 11:30:50,596 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 427 transitions, 8209 flow [2023-09-01 11:30:50,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 85.55813953488372) internal successors, (3679), 43 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:50,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:30:50,597 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:30:50,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-09-01 11:30:50,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:50,803 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:30:50,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:30:50,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2113999335, now seen corresponding path program 15 times [2023-09-01 11:30:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:30:50,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353374956] [2023-09-01 11:30:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:30:50,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:30:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:30:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:30:51,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:30:51,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353374956] [2023-09-01 11:30:51,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353374956] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:30:51,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247022775] [2023-09-01 11:30:51,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:30:51,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:30:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:30:51,465 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:30:51,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-09-01 11:30:51,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 11:30:51,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:30:51,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 11:30:51,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:30:52,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:30:52,257 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 16 treesize of output 18 [2023-09-01 11:30:52,514 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:30:52,517 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-09-01 11:30:52,518 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 53 treesize of output 1 [2023-09-01 11:30:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:30:52,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:30:52,877 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~An~0 (+ c_~i_AB~0 1)) (let ((.cse5 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse0 (+ c_~i_BA~0 1)) (.cse1 (forall ((~B~0.base Int) (v_ArrVal_2250 (Array Int Int))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2250) ~B~0.base) .cse5)))))) (and (or (< .cse0 c_~Bn~0) .cse1) (or (< .cse0 c_~An~0) .cse1) (forall ((~B~0.base Int) (v_ArrVal_2250 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2250))) (let ((.cse2 (select .cse4 ~B~0.base))) (or (let ((.cse3 (* c_~i_BA~0 4))) (= (select .cse2 (+ .cse3 4 c_~B~0.offset)) (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset .cse3 4)))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse2 .cse5)))))))))) (= c_~i_AB~0 c_~i_BA~0)) is different from false [2023-09-01 11:30:52,934 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-09-01 11:30:52,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 161 [2023-09-01 11:30:52,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:30:52,955 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 94 treesize of output 95 [2023-09-01 11:30:53,248 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:30:53,249 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 48 treesize of output 24 [2023-09-01 11:30:53,253 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 11:30:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:30:54,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247022775] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:30:54,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:30:54,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 44 [2023-09-01 11:30:54,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610065751] [2023-09-01 11:30:54,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:30:54,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 11:30:54,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:30:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 11:30:54,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1638, Unknown=1, NotChecked=84, Total=1980 [2023-09-01 11:30:54,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-09-01 11:30:54,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 427 transitions, 8209 flow. Second operand has 45 states, 45 states have (on average 85.57777777777778) internal successors, (3851), 45 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:30:54,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:30:54,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-09-01 11:30:54,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:31:06,563 WARN L222 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 107 DAG size of output: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:31:21,641 WARN L222 SmtUtils]: Spent 14.54s on a formula simplification. DAG size of input: 98 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:31:39,365 WARN L222 SmtUtils]: Spent 12.48s on a formula simplification. DAG size of input: 107 DAG size of output: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:31:42,255 INFO L130 PetriNetUnfolder]: 5584/10462 cut-off events. [2023-09-01 11:31:42,255 INFO L131 PetriNetUnfolder]: For 538053/538053 co-relation queries the response was YES. [2023-09-01 11:31:42,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108027 conditions, 10462 events. 5584/10462 cut-off events. For 538053/538053 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 83483 event pairs, 493 based on Foata normal form. 65/10527 useless extension candidates. Maximal degree in co-relation 105024. Up to 4449 conditions per place. [2023-09-01 11:31:42,395 INFO L137 encePairwiseOnDemand]: 309/324 looper letters, 563 selfloop transitions, 833 changer transitions 39/1435 dead transitions. [2023-09-01 11:31:42,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1435 transitions, 28294 flow [2023-09-01 11:31:42,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-09-01 11:31:42,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-09-01 11:31:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 7313 transitions. [2023-09-01 11:31:42,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2752559470039145 [2023-09-01 11:31:42,400 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 7313 transitions. [2023-09-01 11:31:42,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 7313 transitions. [2023-09-01 11:31:42,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:31:42,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 7313 transitions. [2023-09-01 11:31:42,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 89.1829268292683) internal successors, (7313), 82 states have internal predecessors, (7313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:42,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 324.0) internal successors, (26892), 83 states have internal predecessors, (26892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:42,419 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 324.0) internal successors, (26892), 83 states have internal predecessors, (26892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:42,419 INFO L175 Difference]: Start difference. First operand has 330 places, 427 transitions, 8209 flow. Second operand 82 states and 7313 transitions. [2023-09-01 11:31:42,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1435 transitions, 28294 flow [2023-09-01 11:31:44,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1435 transitions, 27375 flow, removed 162 selfloop flow, removed 26 redundant places. [2023-09-01 11:31:44,448 INFO L231 Difference]: Finished difference. Result has 414 places, 1159 transitions, 24754 flow [2023-09-01 11:31:44,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7921, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=24754, PETRI_PLACES=414, PETRI_TRANSITIONS=1159} [2023-09-01 11:31:44,449 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 393 predicate places. [2023-09-01 11:31:44,449 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1159 transitions, 24754 flow [2023-09-01 11:31:44,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 85.57777777777778) internal successors, (3851), 45 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:44,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:31:44,450 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:31:44,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-09-01 11:31:44,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:31:44,657 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:31:44,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:31:44,657 INFO L85 PathProgramCache]: Analyzing trace with hash -758541815, now seen corresponding path program 25 times [2023-09-01 11:31:44,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:31:44,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416445720] [2023-09-01 11:31:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:31:44,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:31:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:31:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:31:44,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:31:44,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416445720] [2023-09-01 11:31:44,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416445720] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:31:44,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801902517] [2023-09-01 11:31:44,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:31:44,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:31:44,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:31:44,856 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:31:44,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-09-01 11:31:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:31:45,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 11:31:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:31:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:31:45,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:31:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:31:45,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801902517] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:31:45,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:31:45,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 11:31:45,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147042417] [2023-09-01 11:31:45,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:31:45,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 11:31:45,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:31:45,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 11:31:45,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-09-01 11:31:46,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 324 [2023-09-01 11:31:46,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1159 transitions, 24754 flow. Second operand has 30 states, 30 states have (on average 130.9) internal successors, (3927), 30 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:46,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:31:46,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 324 [2023-09-01 11:31:46,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:31:50,547 INFO L130 PetriNetUnfolder]: 5444/10088 cut-off events. [2023-09-01 11:31:50,547 INFO L131 PetriNetUnfolder]: For 891812/891812 co-relation queries the response was YES. [2023-09-01 11:31:50,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129001 conditions, 10088 events. 5444/10088 cut-off events. For 891812/891812 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 78528 event pairs, 389 based on Foata normal form. 126/10214 useless extension candidates. Maximal degree in co-relation 126874. Up to 3770 conditions per place. [2023-09-01 11:31:50,696 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 965 selfloop transitions, 378 changer transitions 1/1344 dead transitions. [2023-09-01 11:31:50,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 1344 transitions, 31216 flow [2023-09-01 11:31:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:31:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:31:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1738 transitions. [2023-09-01 11:31:50,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263057929724595 [2023-09-01 11:31:50,698 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1738 transitions. [2023-09-01 11:31:50,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1738 transitions. [2023-09-01 11:31:50,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:31:50,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1738 transitions. [2023-09-01 11:31:50,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 133.69230769230768) internal successors, (1738), 13 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:50,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:50,702 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:50,702 INFO L175 Difference]: Start difference. First operand has 414 places, 1159 transitions, 24754 flow. Second operand 13 states and 1738 transitions. [2023-09-01 11:31:50,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 1344 transitions, 31216 flow [2023-09-01 11:31:54,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1344 transitions, 28065 flow, removed 1346 selfloop flow, removed 24 redundant places. [2023-09-01 11:31:54,986 INFO L231 Difference]: Finished difference. Result has 400 places, 1170 transitions, 23764 flow [2023-09-01 11:31:54,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=21880, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=23764, PETRI_PLACES=400, PETRI_TRANSITIONS=1170} [2023-09-01 11:31:54,987 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 379 predicate places. [2023-09-01 11:31:54,987 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1170 transitions, 23764 flow [2023-09-01 11:31:54,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 130.9) internal successors, (3927), 30 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:54,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:31:54,987 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:31:54,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-09-01 11:31:55,188 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,SelfDestructingSolverStorable54 [2023-09-01 11:31:55,189 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:31:55,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:31:55,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1839454556, now seen corresponding path program 26 times [2023-09-01 11:31:55,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:31:55,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483952088] [2023-09-01 11:31:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:31:55,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:31:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:31:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:31:55,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:31:56,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483952088] [2023-09-01 11:31:56,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483952088] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:31:56,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093115371] [2023-09-01 11:31:56,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:31:56,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:31:56,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:31:56,001 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:31:56,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-09-01 11:31:56,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:31:56,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:31:56,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:31:56,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:31:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:31:56,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:31:57,020 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:31:57,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:31:57,060 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:31:57,060 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 60 [2023-09-01 11:31:57,078 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:31:57,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:31:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:31:57,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093115371] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:31:57,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:31:57,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2023-09-01 11:31:57,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474085720] [2023-09-01 11:31:57,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:31:57,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 11:31:57,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:31:57,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 11:31:57,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1753, Unknown=0, NotChecked=0, Total=1980 [2023-09-01 11:32:01,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-09-01 11:32:01,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1170 transitions, 23764 flow. Second operand has 45 states, 45 states have (on average 115.66666666666667) internal successors, (5205), 45 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:01,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:32:01,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-09-01 11:32:01,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:32:06,781 INFO L130 PetriNetUnfolder]: 5759/10633 cut-off events. [2023-09-01 11:32:06,782 INFO L131 PetriNetUnfolder]: For 820110/820110 co-relation queries the response was YES. [2023-09-01 11:32:06,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124615 conditions, 10633 events. 5759/10633 cut-off events. For 820110/820110 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 83669 event pairs, 844 based on Foata normal form. 74/10707 useless extension candidates. Maximal degree in co-relation 124454. Up to 9025 conditions per place. [2023-09-01 11:32:06,906 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 1090 selfloop transitions, 235 changer transitions 0/1325 dead transitions. [2023-09-01 11:32:06,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1325 transitions, 28896 flow [2023-09-01 11:32:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:32:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:32:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2016 transitions. [2023-09-01 11:32:06,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3660130718954248 [2023-09-01 11:32:06,908 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2016 transitions. [2023-09-01 11:32:06,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2016 transitions. [2023-09-01 11:32:06,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:32:06,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2016 transitions. [2023-09-01 11:32:06,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 118.58823529411765) internal successors, (2016), 17 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:06,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:06,914 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:06,914 INFO L175 Difference]: Start difference. First operand has 400 places, 1170 transitions, 23764 flow. Second operand 17 states and 2016 transitions. [2023-09-01 11:32:06,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1325 transitions, 28896 flow [2023-09-01 11:32:09,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1325 transitions, 28726 flow, removed 18 selfloop flow, removed 10 redundant places. [2023-09-01 11:32:09,672 INFO L231 Difference]: Finished difference. Result has 411 places, 1240 transitions, 25680 flow [2023-09-01 11:32:09,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=23606, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=947, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=25680, PETRI_PLACES=411, PETRI_TRANSITIONS=1240} [2023-09-01 11:32:09,673 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 390 predicate places. [2023-09-01 11:32:09,674 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 1240 transitions, 25680 flow [2023-09-01 11:32:09,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 115.66666666666667) internal successors, (5205), 45 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:09,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:32:09,675 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:32:09,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-09-01 11:32:09,875 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,SelfDestructingSolverStorable55 [2023-09-01 11:32:09,875 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:32:09,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:32:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash -382969371, now seen corresponding path program 16 times [2023-09-01 11:32:09,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:32:09,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446376984] [2023-09-01 11:32:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:32:09,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:32:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:32:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:32:10,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:32:10,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446376984] [2023-09-01 11:32:10,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446376984] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:32:10,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120647868] [2023-09-01 11:32:10,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:32:10,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:32:10,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:32:10,365 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:32:10,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-09-01 11:32:10,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:32:10,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:32:10,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 11:32:10,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:32:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:32:10,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:32:10,974 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:32:10,974 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 60 [2023-09-01 11:32:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:32:11,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120647868] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:32:11,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:32:11,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-09-01 11:32:11,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523134382] [2023-09-01 11:32:11,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:32:11,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 11:32:11,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:32:11,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 11:32:11,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2023-09-01 11:32:13,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-09-01 11:32:13,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 1240 transitions, 25680 flow. Second operand has 28 states, 28 states have (on average 128.32142857142858) internal successors, (3593), 28 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:13,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:32:13,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-09-01 11:32:13,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:32:18,011 INFO L130 PetriNetUnfolder]: 5803/10767 cut-off events. [2023-09-01 11:32:18,011 INFO L131 PetriNetUnfolder]: For 839153/839153 co-relation queries the response was YES. [2023-09-01 11:32:18,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129247 conditions, 10767 events. 5803/10767 cut-off events. For 839153/839153 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 85445 event pairs, 804 based on Foata normal form. 16/10783 useless extension candidates. Maximal degree in co-relation 129080. Up to 7607 conditions per place. [2023-09-01 11:32:18,284 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 924 selfloop transitions, 443 changer transitions 59/1426 dead transitions. [2023-09-01 11:32:18,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1426 transitions, 31517 flow [2023-09-01 11:32:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:32:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:32:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2517 transitions. [2023-09-01 11:32:18,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408869395711501 [2023-09-01 11:32:18,286 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2517 transitions. [2023-09-01 11:32:18,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2517 transitions. [2023-09-01 11:32:18,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:32:18,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2517 transitions. [2023-09-01 11:32:18,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 132.47368421052633) internal successors, (2517), 19 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:18,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:18,291 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:18,291 INFO L175 Difference]: Start difference. First operand has 411 places, 1240 transitions, 25680 flow. Second operand 19 states and 2517 transitions. [2023-09-01 11:32:18,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1426 transitions, 31517 flow [2023-09-01 11:32:21,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1426 transitions, 30917 flow, removed 178 selfloop flow, removed 12 redundant places. [2023-09-01 11:32:21,087 INFO L231 Difference]: Finished difference. Result has 420 places, 1281 transitions, 26788 flow [2023-09-01 11:32:21,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=25102, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=26788, PETRI_PLACES=420, PETRI_TRANSITIONS=1281} [2023-09-01 11:32:21,089 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 399 predicate places. [2023-09-01 11:32:21,089 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1281 transitions, 26788 flow [2023-09-01 11:32:21,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 128.32142857142858) internal successors, (3593), 28 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:21,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:32:21,090 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:32:21,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-09-01 11:32:21,296 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,SelfDestructingSolverStorable56 [2023-09-01 11:32:21,296 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:32:21,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:32:21,297 INFO L85 PathProgramCache]: Analyzing trace with hash -725040933, now seen corresponding path program 17 times [2023-09-01 11:32:21,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:32:21,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940210464] [2023-09-01 11:32:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:32:21,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:32:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:32:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:32:21,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:32:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940210464] [2023-09-01 11:32:21,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940210464] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:32:21,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062973768] [2023-09-01 11:32:21,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:32:21,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:32:21,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:32:21,769 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:32:21,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-09-01 11:32:21,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 11:32:21,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:32:21,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:32:21,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:32:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:32:22,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:32:22,360 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:32:22,360 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 60 [2023-09-01 11:32:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:32:22,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062973768] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:32:22,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:32:22,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 23 [2023-09-01 11:32:22,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967424906] [2023-09-01 11:32:22,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:32:22,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 11:32:22,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:32:22,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 11:32:22,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:32:23,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-09-01 11:32:23,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1281 transitions, 26788 flow. Second operand has 24 states, 24 states have (on average 128.04166666666666) internal successors, (3073), 24 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:23,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:32:23,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-09-01 11:32:23,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:32:28,707 INFO L130 PetriNetUnfolder]: 5690/10589 cut-off events. [2023-09-01 11:32:28,707 INFO L131 PetriNetUnfolder]: For 846130/846130 co-relation queries the response was YES. [2023-09-01 11:32:28,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129551 conditions, 10589 events. 5690/10589 cut-off events. For 846130/846130 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 83849 event pairs, 806 based on Foata normal form. 28/10617 useless extension candidates. Maximal degree in co-relation 129381. Up to 7603 conditions per place. [2023-09-01 11:32:28,827 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 880 selfloop transitions, 496 changer transitions 34/1410 dead transitions. [2023-09-01 11:32:28,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1410 transitions, 31928 flow [2023-09-01 11:32:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 11:32:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 11:32:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2644 transitions. [2023-09-01 11:32:28,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080246913580247 [2023-09-01 11:32:28,829 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2644 transitions. [2023-09-01 11:32:28,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2644 transitions. [2023-09-01 11:32:28,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:32:28,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2644 transitions. [2023-09-01 11:32:28,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.2) internal successors, (2644), 20 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:28,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:28,833 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:28,833 INFO L175 Difference]: Start difference. First operand has 420 places, 1281 transitions, 26788 flow. Second operand 20 states and 2644 transitions. [2023-09-01 11:32:28,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1410 transitions, 31928 flow [2023-09-01 11:32:31,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1410 transitions, 31323 flow, removed 35 selfloop flow, removed 9 redundant places. [2023-09-01 11:32:31,785 INFO L231 Difference]: Finished difference. Result has 430 places, 1306 transitions, 28031 flow [2023-09-01 11:32:31,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=26211, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=28031, PETRI_PLACES=430, PETRI_TRANSITIONS=1306} [2023-09-01 11:32:31,786 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 409 predicate places. [2023-09-01 11:32:31,786 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1306 transitions, 28031 flow [2023-09-01 11:32:31,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 128.04166666666666) internal successors, (3073), 24 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:31,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:32:31,786 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:32:31,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-09-01 11:32:31,987 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,SelfDestructingSolverStorable57 [2023-09-01 11:32:31,987 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:32:31,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:32:31,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1588312397, now seen corresponding path program 18 times [2023-09-01 11:32:31,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:32:31,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495446398] [2023-09-01 11:32:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:32:31,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:32:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:32:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:32:32,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:32:32,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495446398] [2023-09-01 11:32:32,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495446398] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:32:32,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216554945] [2023-09-01 11:32:32,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:32:32,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:32:32,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:32:32,388 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) [2023-09-01 11:32:32,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-09-01 11:32:32,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:32:32,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:32:32,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 11:32:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:32:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:32:32,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:32:32,957 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:32:32,957 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 60 [2023-09-01 11:32:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:32:33,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216554945] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:32:33,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:32:33,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 28 [2023-09-01 11:32:33,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321972154] [2023-09-01 11:32:33,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:32:33,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 11:32:33,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:32:33,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 11:32:33,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2023-09-01 11:32:35,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-09-01 11:32:35,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1306 transitions, 28031 flow. Second operand has 29 states, 29 states have (on average 128.10344827586206) internal successors, (3715), 29 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:35,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:32:35,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-09-01 11:32:35,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:32:41,078 INFO L130 PetriNetUnfolder]: 5655/10490 cut-off events. [2023-09-01 11:32:41,078 INFO L131 PetriNetUnfolder]: For 849220/849220 co-relation queries the response was YES. [2023-09-01 11:32:41,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130618 conditions, 10490 events. 5655/10490 cut-off events. For 849220/849220 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 82780 event pairs, 785 based on Foata normal form. 12/10502 useless extension candidates. Maximal degree in co-relation 130445. Up to 7475 conditions per place. [2023-09-01 11:32:41,210 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 868 selfloop transitions, 544 changer transitions 2/1414 dead transitions. [2023-09-01 11:32:41,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1414 transitions, 33264 flow [2023-09-01 11:32:41,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 11:32:41,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 11:32:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3030 transitions. [2023-09-01 11:32:41,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40660225442834136 [2023-09-01 11:32:41,212 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3030 transitions. [2023-09-01 11:32:41,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3030 transitions. [2023-09-01 11:32:41,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:32:41,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3030 transitions. [2023-09-01 11:32:41,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 131.7391304347826) internal successors, (3030), 23 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:41,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:41,220 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:41,220 INFO L175 Difference]: Start difference. First operand has 430 places, 1306 transitions, 28031 flow. Second operand 23 states and 3030 transitions. [2023-09-01 11:32:41,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1414 transitions, 33264 flow [2023-09-01 11:32:44,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 1414 transitions, 32586 flow, removed 42 selfloop flow, removed 11 redundant places. [2023-09-01 11:32:44,797 INFO L231 Difference]: Finished difference. Result has 443 places, 1330 transitions, 29275 flow [2023-09-01 11:32:44,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=27373, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=777, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=29275, PETRI_PLACES=443, PETRI_TRANSITIONS=1330} [2023-09-01 11:32:44,798 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 422 predicate places. [2023-09-01 11:32:44,798 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 1330 transitions, 29275 flow [2023-09-01 11:32:44,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 128.10344827586206) internal successors, (3715), 29 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:44,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:32:44,798 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:32:44,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-09-01 11:32:44,999 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,SelfDestructingSolverStorable58 [2023-09-01 11:32:44,999 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:32:44,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:32:44,999 INFO L85 PathProgramCache]: Analyzing trace with hash 93397669, now seen corresponding path program 19 times [2023-09-01 11:32:45,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:32:45,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965224764] [2023-09-01 11:32:45,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:32:45,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:32:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:32:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:32:45,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:32:45,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965224764] [2023-09-01 11:32:45,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965224764] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:32:45,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506793484] [2023-09-01 11:32:45,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:32:45,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:32:45,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:32:45,481 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) [2023-09-01 11:32:45,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-09-01 11:32:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:32:45,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 11:32:45,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:32:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 11:32:45,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:32:46,076 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-09-01 11:32:46,076 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 60 [2023-09-01 11:32:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:32:46,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506793484] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:32:46,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:32:46,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 27 [2023-09-01 11:32:46,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149038609] [2023-09-01 11:32:46,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:32:46,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 11:32:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:32:46,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 11:32:46,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2023-09-01 11:32:49,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-09-01 11:32:49,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 1330 transitions, 29275 flow. Second operand has 28 states, 28 states have (on average 128.10714285714286) internal successors, (3587), 28 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:49,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:32:49,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-09-01 11:32:49,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:32:54,713 INFO L130 PetriNetUnfolder]: 5655/10526 cut-off events. [2023-09-01 11:32:54,713 INFO L131 PetriNetUnfolder]: For 875969/875969 co-relation queries the response was YES. [2023-09-01 11:32:54,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133112 conditions, 10526 events. 5655/10526 cut-off events. For 875969/875969 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 83528 event pairs, 806 based on Foata normal form. 24/10550 useless extension candidates. Maximal degree in co-relation 132934. Up to 7633 conditions per place. [2023-09-01 11:32:54,837 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 869 selfloop transitions, 521 changer transitions 17/1407 dead transitions. [2023-09-01 11:32:54,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1407 transitions, 33670 flow [2023-09-01 11:32:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:32:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:32:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2902 transitions. [2023-09-01 11:32:54,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40712682379349047 [2023-09-01 11:32:54,839 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2902 transitions. [2023-09-01 11:32:54,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2902 transitions. [2023-09-01 11:32:54,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:32:54,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2902 transitions. [2023-09-01 11:32:54,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 131.9090909090909) internal successors, (2902), 22 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:54,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:54,844 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:54,844 INFO L175 Difference]: Start difference. First operand has 443 places, 1330 transitions, 29275 flow. Second operand 22 states and 2902 transitions. [2023-09-01 11:32:54,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1407 transitions, 33670 flow [2023-09-01 11:32:57,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1407 transitions, 32953 flow, removed 57 selfloop flow, removed 15 redundant places. [2023-09-01 11:32:57,945 INFO L231 Difference]: Finished difference. Result has 449 places, 1325 transitions, 29540 flow [2023-09-01 11:32:57,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=28558, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=809, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=29540, PETRI_PLACES=449, PETRI_TRANSITIONS=1325} [2023-09-01 11:32:57,947 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 428 predicate places. [2023-09-01 11:32:57,947 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1325 transitions, 29540 flow [2023-09-01 11:32:57,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 128.10714285714286) internal successors, (3587), 28 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:57,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:32:57,948 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:32:57,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-09-01 11:32:58,150 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,SelfDestructingSolverStorable59 [2023-09-01 11:32:58,151 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:32:58,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:32:58,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2035281252, now seen corresponding path program 27 times [2023-09-01 11:32:58,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:32:58,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591038755] [2023-09-01 11:32:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:32:58,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:32:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:32:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:32:58,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:32:58,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591038755] [2023-09-01 11:32:58,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591038755] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:32:58,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102603299] [2023-09-01 11:32:58,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:32:58,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:32:58,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:32:58,824 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) [2023-09-01 11:32:58,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-09-01 11:32:59,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 11:32:59,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:32:59,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 11:32:59,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:32:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:32:59,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:33:00,169 INFO L321 Elim1Store]: treesize reduction 26, result has 86.7 percent of original size [2023-09-01 11:33:00,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 198 [2023-09-01 11:33:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 11:33:00,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102603299] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:33:00,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:33:00,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 44 [2023-09-01 11:33:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936946109] [2023-09-01 11:33:00,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:33:00,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 11:33:00,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:33:00,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 11:33:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2023-09-01 11:33:05,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-09-01 11:33:05,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1325 transitions, 29540 flow. Second operand has 45 states, 45 states have (on average 113.57777777777778) internal successors, (5111), 45 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:05,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:33:05,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-09-01 11:33:05,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:33:19,733 INFO L130 PetriNetUnfolder]: 10529/19537 cut-off events. [2023-09-01 11:33:19,733 INFO L131 PetriNetUnfolder]: For 1584470/1584470 co-relation queries the response was YES. [2023-09-01 11:33:19,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238790 conditions, 19537 events. 10529/19537 cut-off events. For 1584470/1584470 co-relation queries the response was YES. Maximal size of possible extension queue 1207. Compared 170965 event pairs, 377 based on Foata normal form. 258/19795 useless extension candidates. Maximal degree in co-relation 238611. Up to 8089 conditions per place. [2023-09-01 11:33:19,976 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 936 selfloop transitions, 2237 changer transitions 32/3205 dead transitions. [2023-09-01 11:33:19,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 3205 transitions, 73804 flow [2023-09-01 11:33:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-09-01 11:33:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-09-01 11:33:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 9159 transitions. [2023-09-01 11:33:19,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36241690408357075 [2023-09-01 11:33:19,982 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 9159 transitions. [2023-09-01 11:33:19,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 9159 transitions. [2023-09-01 11:33:19,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:33:19,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 9159 transitions. [2023-09-01 11:33:19,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 117.42307692307692) internal successors, (9159), 78 states have internal predecessors, (9159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:20,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 324.0) internal successors, (25596), 79 states have internal predecessors, (25596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:20,007 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 324.0) internal successors, (25596), 79 states have internal predecessors, (25596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:20,007 INFO L175 Difference]: Start difference. First operand has 449 places, 1325 transitions, 29540 flow. Second operand 78 states and 9159 transitions. [2023-09-01 11:33:20,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 3205 transitions, 73804 flow [2023-09-01 11:33:28,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 3205 transitions, 71757 flow, removed 0 selfloop flow, removed 17 redundant places. [2023-09-01 11:33:28,272 INFO L231 Difference]: Finished difference. Result has 533 places, 2799 transitions, 68705 flow [2023-09-01 11:33:28,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=28637, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=885, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=68705, PETRI_PLACES=533, PETRI_TRANSITIONS=2799} [2023-09-01 11:33:28,274 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 512 predicate places. [2023-09-01 11:33:28,274 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 2799 transitions, 68705 flow [2023-09-01 11:33:28,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 113.57777777777778) internal successors, (5111), 45 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:28,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:33:28,275 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:33:28,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-09-01 11:33:28,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:33:28,481 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:33:28,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:33:28,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1305015792, now seen corresponding path program 28 times [2023-09-01 11:33:28,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:33:28,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305997323] [2023-09-01 11:33:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:33:28,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:33:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:33:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:33:29,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:33:29,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305997323] [2023-09-01 11:33:29,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305997323] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:33:29,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040672150] [2023-09-01 11:33:29,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:33:29,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:33:29,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:33:29,034 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) [2023-09-01 11:33:29,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-09-01 11:33:29,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:33:29,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:33:29,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:33:29,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:33:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:33:29,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:33:29,957 INFO L321 Elim1Store]: treesize reduction 15, result has 93.1 percent of original size [2023-09-01 11:33:29,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 232 [2023-09-01 11:33:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:33:30,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040672150] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:33:30,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:33:30,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 32 [2023-09-01 11:33:30,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579394090] [2023-09-01 11:33:30,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:33:30,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 11:33:30,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:33:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 11:33:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 11:33:32,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:33:36,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:33:39,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:33:41,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:33:42,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-09-01 11:33:42,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 2799 transitions, 68705 flow. Second operand has 33 states, 33 states have (on average 113.9090909090909) internal successors, (3759), 33 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:42,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:33:42,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-09-01 11:33:42,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:33:56,355 INFO L130 PetriNetUnfolder]: 10325/18871 cut-off events. [2023-09-01 11:33:56,356 INFO L131 PetriNetUnfolder]: For 1922955/1922955 co-relation queries the response was YES. [2023-09-01 11:33:56,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257749 conditions, 18871 events. 10325/18871 cut-off events. For 1922955/1922955 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 161942 event pairs, 1509 based on Foata normal form. 60/18931 useless extension candidates. Maximal degree in co-relation 257544. Up to 13827 conditions per place. [2023-09-01 11:33:56,620 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 1774 selfloop transitions, 1075 changer transitions 11/2860 dead transitions. [2023-09-01 11:33:56,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 2860 transitions, 75530 flow [2023-09-01 11:33:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 11:33:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 11:33:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3144 transitions. [2023-09-01 11:33:56,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35939643347050754 [2023-09-01 11:33:56,622 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3144 transitions. [2023-09-01 11:33:56,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3144 transitions. [2023-09-01 11:33:56,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:33:56,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3144 transitions. [2023-09-01 11:33:56,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 116.44444444444444) internal successors, (3144), 27 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) [2023-09-01 11:33:56,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:56,628 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:56,628 INFO L175 Difference]: Start difference. First operand has 533 places, 2799 transitions, 68705 flow. Second operand 27 states and 3144 transitions. [2023-09-01 11:33:56,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 2860 transitions, 75530 flow [2023-09-01 11:34:08,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 2860 transitions, 71617 flow, removed 1554 selfloop flow, removed 14 redundant places. [2023-09-01 11:34:08,591 INFO L231 Difference]: Finished difference. Result has 547 places, 2782 transitions, 66527 flow [2023-09-01 11:34:08,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=64236, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1075, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=66527, PETRI_PLACES=547, PETRI_TRANSITIONS=2782} [2023-09-01 11:34:08,594 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 526 predicate places. [2023-09-01 11:34:08,594 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 2782 transitions, 66527 flow [2023-09-01 11:34:08,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 113.9090909090909) internal successors, (3759), 33 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:34:08,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:34:08,595 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:34:08,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-09-01 11:34:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:34:08,797 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:34:08,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:34:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2023043557, now seen corresponding path program 20 times [2023-09-01 11:34:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:34:08,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917518975] [2023-09-01 11:34:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:34:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:34:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:34:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:34:09,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:34:09,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917518975] [2023-09-01 11:34:09,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917518975] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:34:09,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294331090] [2023-09-01 11:34:09,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:34:09,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:34:09,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:34:09,173 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) [2023-09-01 11:34:09,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-09-01 11:34:09,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:34:09,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:34:09,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 11:34:09,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:34:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:34:09,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:34:09,671 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:34:09,671 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 40 treesize of output 56 [2023-09-01 11:34:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:34:09,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294331090] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:34:09,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:34:09,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 6] total 25 [2023-09-01 11:34:09,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796901804] [2023-09-01 11:34:09,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:34:09,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 11:34:09,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:34:09,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 11:34:09,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2023-09-01 11:34:11,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-09-01 11:34:11,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 2782 transitions, 66527 flow. Second operand has 26 states, 26 states have (on average 128.34615384615384) internal successors, (3337), 26 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:34:11,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:34:11,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-09-01 11:34:11,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:34:25,874 INFO L130 PetriNetUnfolder]: 10551/19236 cut-off events. [2023-09-01 11:34:25,874 INFO L131 PetriNetUnfolder]: For 2084013/2084013 co-relation queries the response was YES. [2023-09-01 11:34:26,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264098 conditions, 19236 events. 10551/19236 cut-off events. For 2084013/2084013 co-relation queries the response was YES. Maximal size of possible extension queue 1208. Compared 165033 event pairs, 1191 based on Foata normal form. 24/19260 useless extension candidates. Maximal degree in co-relation 263892. Up to 13083 conditions per place. [2023-09-01 11:34:26,152 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 1948 selfloop transitions, 1032 changer transitions 6/2986 dead transitions. [2023-09-01 11:34:26,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 2986 transitions, 77866 flow [2023-09-01 11:34:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:34:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:34:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2930 transitions. [2023-09-01 11:34:26,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110549943883277 [2023-09-01 11:34:26,155 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2930 transitions. [2023-09-01 11:34:26,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2930 transitions. [2023-09-01 11:34:26,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:34:26,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2930 transitions. [2023-09-01 11:34:26,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 133.1818181818182) internal successors, (2930), 22 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:34:26,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:34:26,160 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:34:26,160 INFO L175 Difference]: Start difference. First operand has 547 places, 2782 transitions, 66527 flow. Second operand 22 states and 2930 transitions. [2023-09-01 11:34:26,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 2986 transitions, 77866 flow [2023-09-01 11:34:38,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 2986 transitions, 75162 flow, removed 126 selfloop flow, removed 27 redundant places. [2023-09-01 11:34:38,385 INFO L231 Difference]: Finished difference. Result has 542 places, 2834 transitions, 67726 flow [2023-09-01 11:34:38,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=63997, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=983, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=67726, PETRI_PLACES=542, PETRI_TRANSITIONS=2834} [2023-09-01 11:34:38,386 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 521 predicate places. [2023-09-01 11:34:38,386 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 2834 transitions, 67726 flow [2023-09-01 11:34:38,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 128.34615384615384) internal successors, (3337), 26 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:34:38,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:34:38,387 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:34:38,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-09-01 11:34:38,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:34:38,587 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:34:38,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:34:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2133455558, now seen corresponding path program 29 times [2023-09-01 11:34:38,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:34:38,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192155075] [2023-09-01 11:34:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:34:38,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:34:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:34:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:34:39,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:34:39,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192155075] [2023-09-01 11:34:39,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192155075] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:34:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617173846] [2023-09-01 11:34:39,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:34:39,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:34:39,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:34:39,295 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) [2023-09-01 11:34:39,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-09-01 11:34:39,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:34:39,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:34:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 11:34:39,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:34:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:34:39,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:34:40,130 INFO L321 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-09-01 11:34:40,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 183 [2023-09-01 11:34:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 11:34:40,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617173846] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:34:40,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:34:40,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 31 [2023-09-01 11:34:40,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385816519] [2023-09-01 11:34:40,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:34:40,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 11:34:40,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:34:40,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 11:34:40,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-09-01 11:34:43,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 324 [2023-09-01 11:34:43,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 2834 transitions, 67726 flow. Second operand has 32 states, 32 states have (on average 114.96875) internal successors, (3679), 32 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:34:43,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:34:43,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 324 [2023-09-01 11:34:43,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:34:59,554 INFO L130 PetriNetUnfolder]: 11089/20383 cut-off events. [2023-09-01 11:34:59,554 INFO L131 PetriNetUnfolder]: For 2503640/2503640 co-relation queries the response was YES. [2023-09-01 11:34:59,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275431 conditions, 20383 events. 11089/20383 cut-off events. For 2503640/2503640 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 177805 event pairs, 1467 based on Foata normal form. 493/20876 useless extension candidates. Maximal degree in co-relation 275223. Up to 13322 conditions per place. [2023-09-01 11:34:59,853 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 1800 selfloop transitions, 1503 changer transitions 27/3330 dead transitions. [2023-09-01 11:34:59,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 3330 transitions, 86650 flow [2023-09-01 11:34:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-09-01 11:34:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-09-01 11:34:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 5098 transitions. [2023-09-01 11:34:59,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36592018374964114 [2023-09-01 11:34:59,856 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 5098 transitions. [2023-09-01 11:34:59,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 5098 transitions. [2023-09-01 11:34:59,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:34:59,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 5098 transitions. [2023-09-01 11:34:59,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 118.55813953488372) internal successors, (5098), 43 states have internal predecessors, (5098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:34:59,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 324.0) internal successors, (14256), 44 states have internal predecessors, (14256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:34:59,869 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 324.0) internal successors, (14256), 44 states have internal predecessors, (14256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:34:59,869 INFO L175 Difference]: Start difference. First operand has 542 places, 2834 transitions, 67726 flow. Second operand 43 states and 5098 transitions. [2023-09-01 11:34:59,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 3330 transitions, 86650 flow [2023-09-01 11:35:12,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 3330 transitions, 84027 flow, removed 233 selfloop flow, removed 13 redundant places. [2023-09-01 11:35:12,543 INFO L231 Difference]: Finished difference. Result has 586 places, 3071 transitions, 76561 flow [2023-09-01 11:35:12,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=65255, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=76561, PETRI_PLACES=586, PETRI_TRANSITIONS=3071} [2023-09-01 11:35:12,545 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 565 predicate places. [2023-09-01 11:35:12,545 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 3071 transitions, 76561 flow [2023-09-01 11:35:12,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 114.96875) internal successors, (3679), 32 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:12,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:35:12,546 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:35:12,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-09-01 11:35:12,752 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,SelfDestructingSolverStorable63 [2023-09-01 11:35:12,752 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:35:12,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:35:12,752 INFO L85 PathProgramCache]: Analyzing trace with hash -376175906, now seen corresponding path program 30 times [2023-09-01 11:35:12,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:35:12,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978846269] [2023-09-01 11:35:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:35:12,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:35:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:35:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:35:13,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:35:13,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978846269] [2023-09-01 11:35:13,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978846269] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:35:13,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047397374] [2023-09-01 11:35:13,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:35:13,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:35:13,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:35:13,368 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) [2023-09-01 11:35:13,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-09-01 11:35:13,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 11:35:13,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:35:13,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 46 conjunts are in the unsatisfiable core [2023-09-01 11:35:13,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:35:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:35:14,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:35:14,581 INFO L321 Elim1Store]: treesize reduction 26, result has 86.7 percent of original size [2023-09-01 11:35:14,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 198 [2023-09-01 11:35:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:35:15,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047397374] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:35:15,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:35:15,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 43 [2023-09-01 11:35:15,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365030241] [2023-09-01 11:35:15,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:35:15,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 11:35:15,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:35:15,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 11:35:15,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2023-09-01 11:35:20,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-09-01 11:35:20,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 3071 transitions, 76561 flow. Second operand has 44 states, 44 states have (on average 113.56818181818181) internal successors, (4997), 44 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:20,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:35:20,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-09-01 11:35:20,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:35:42,717 INFO L130 PetriNetUnfolder]: 12614/22948 cut-off events. [2023-09-01 11:35:42,717 INFO L131 PetriNetUnfolder]: For 4354045/4354045 co-relation queries the response was YES. [2023-09-01 11:35:42,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348270 conditions, 22948 events. 12614/22948 cut-off events. For 4354045/4354045 co-relation queries the response was YES. Maximal size of possible extension queue 1387. Compared 201272 event pairs, 449 based on Foata normal form. 300/23248 useless extension candidates. Maximal degree in co-relation 348047. Up to 8660 conditions per place. [2023-09-01 11:35:43,086 INFO L137 encePairwiseOnDemand]: 311/324 looper letters, 940 selfloop transitions, 3012 changer transitions 35/3987 dead transitions. [2023-09-01 11:35:43,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 3987 transitions, 104692 flow [2023-09-01 11:35:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-09-01 11:35:43,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-09-01 11:35:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 8558 transitions. [2023-09-01 11:35:43,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36182986639607645 [2023-09-01 11:35:43,091 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 8558 transitions. [2023-09-01 11:35:43,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 8558 transitions. [2023-09-01 11:35:43,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:35:43,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 8558 transitions. [2023-09-01 11:35:43,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 117.23287671232876) internal successors, (8558), 73 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:43,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 324.0) internal successors, (23976), 74 states have internal predecessors, (23976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:43,106 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 324.0) internal successors, (23976), 74 states have internal predecessors, (23976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:43,106 INFO L175 Difference]: Start difference. First operand has 586 places, 3071 transitions, 76561 flow. Second operand 73 states and 8558 transitions. [2023-09-01 11:35:43,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 3987 transitions, 104692 flow [2023-09-01 11:36:04,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 3987 transitions, 100600 flow, removed 1047 selfloop flow, removed 20 redundant places. [2023-09-01 11:36:04,705 INFO L231 Difference]: Finished difference. Result has 652 places, 3728 transitions, 100181 flow [2023-09-01 11:36:04,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=72807, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=100181, PETRI_PLACES=652, PETRI_TRANSITIONS=3728} [2023-09-01 11:36:04,707 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 631 predicate places. [2023-09-01 11:36:04,708 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 3728 transitions, 100181 flow [2023-09-01 11:36:04,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 113.56818181818181) internal successors, (4997), 44 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:36:04,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:36:04,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:36:04,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-09-01 11:36:04,915 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,SelfDestructingSolverStorable64 [2023-09-01 11:36:04,915 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:36:04,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:36:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1673633428, now seen corresponding path program 31 times [2023-09-01 11:36:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:36:04,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788902092] [2023-09-01 11:36:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:36:04,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:36:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:36:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:36:05,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:36:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788902092] [2023-09-01 11:36:05,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788902092] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:36:05,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771420752] [2023-09-01 11:36:05,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:36:05,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:36:05,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:36:05,489 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) [2023-09-01 11:36:05,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-09-01 11:36:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:36:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 43 conjunts are in the unsatisfiable core [2023-09-01 11:36:05,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:36:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:36:06,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:36:06,259 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:36:06,259 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 47 treesize of output 80 [2023-09-01 11:36:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:36:06,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771420752] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:36:06,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:36:06,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2023-09-01 11:36:06,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865202665] [2023-09-01 11:36:06,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:36:06,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-09-01 11:36:06,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:36:06,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-09-01 11:36:06,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2023-09-01 11:36:10,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-09-01 11:36:10,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 3728 transitions, 100181 flow. Second operand has 44 states, 44 states have (on average 113.61363636363636) internal successors, (4999), 44 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:36:10,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:36:10,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-09-01 11:36:10,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:36:32,545 INFO L130 PetriNetUnfolder]: 12555/22804 cut-off events. [2023-09-01 11:36:32,546 INFO L131 PetriNetUnfolder]: For 4493745/4493745 co-relation queries the response was YES. [2023-09-01 11:36:32,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370591 conditions, 22804 events. 12555/22804 cut-off events. For 4493745/4493745 co-relation queries the response was YES. Maximal size of possible extension queue 1348. Compared 198214 event pairs, 2007 based on Foata normal form. 8/22812 useless extension candidates. Maximal degree in co-relation 370352. Up to 21747 conditions per place. [2023-09-01 11:36:32,992 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 3442 selfloop transitions, 312 changer transitions 10/3764 dead transitions. [2023-09-01 11:36:32,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 3764 transitions, 108498 flow [2023-09-01 11:36:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 11:36:32,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 11:36:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2090 transitions. [2023-09-01 11:36:32,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35836762688614543 [2023-09-01 11:36:32,994 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2090 transitions. [2023-09-01 11:36:32,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2090 transitions. [2023-09-01 11:36:32,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:36:32,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2090 transitions. [2023-09-01 11:36:32,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 116.11111111111111) internal successors, (2090), 18 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:36:32,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:36:32,998 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:36:32,998 INFO L175 Difference]: Start difference. First operand has 652 places, 3728 transitions, 100181 flow. Second operand 18 states and 2090 transitions. [2023-09-01 11:36:32,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 3764 transitions, 108498 flow Killed by 15