./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 AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:25:31,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:25:31,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:25:31,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:25:31,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:25:31,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:25:31,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:25:31,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:25:31,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:25:31,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:25:31,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:25:31,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:25:31,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:25:31,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:25:31,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:25:31,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:25:31,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:25:31,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:25:31,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:25:31,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:25:31,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:25:31,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:25:31,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:25:31,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:25:31,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:25:31,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:25:31,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:25:31,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:25:31,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:25:31,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:25:31,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:25:31,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:25:31,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:25:31,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:25:31,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:25:31,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:25:31,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:25:31,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:25:31,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:25:31,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:25:31,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:25:31,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:25:31,625 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:25:31,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:25:31,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:25:31,627 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:25:31,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:25:31,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:25:31,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:25:31,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:25:31,629 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:25:31,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:25:31,630 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:25:31,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:25:31,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:25:31,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:25:31,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:25:31,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:25:31,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:25:31,631 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:25:31,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:25:31,631 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:25:31,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:25:31,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:25:31,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:25:31,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:25:31,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:25:31,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:25:31,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:25:31,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:25:31,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:25:31,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:25:31,633 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:25:31,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:25:31,634 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:25:31,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:25:31,634 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:25:31,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:25:31,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:25:31,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:25:31,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:25:31,986 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:25:31,986 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:25:31,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-30 18:25:33,200 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:25:33,437 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:25:33,437 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-30 18:25:33,442 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ee863b0/a5f0919fc9c44f60824191834f2eace4/FLAG2bdee5d20 [2023-08-30 18:25:33,455 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ee863b0/a5f0919fc9c44f60824191834f2eace4 [2023-08-30 18:25:33,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:25:33,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:25:33,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:25:33,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:25:33,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:25:33,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ab038bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33, skipping insertion in model container [2023-08-30 18:25:33,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:25:33,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:25:33,622 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] [2023-08-30 18:25:33,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:25:33,637 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:25:33,653 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] [2023-08-30 18:25:33,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:25:33,669 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:25:33,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33 WrapperNode [2023-08-30 18:25:33,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:25:33,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:25:33,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:25:33,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:25:33,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,707 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 116 [2023-08-30 18:25:33,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:25:33,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:25:33,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:25:33,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:25:33,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,732 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:25:33,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:25:33,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:25:33,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:25:33,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (1/1) ... [2023-08-30 18:25:33,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:25:33,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:25:33,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 18:25:33,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 18:25:33,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:25:33,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 18:25:33,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 18:25:33,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 18:25:33,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 18:25:33,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:25:33,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:25:33,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:25:33,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:25:33,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:25:33,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:25:33,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:25:33,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:25:33,828 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 18:25:33,939 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:25:33,941 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:25:34,284 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:25:34,294 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:25:34,295 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 18:25:34,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:25:34 BoogieIcfgContainer [2023-08-30 18:25:34,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:25:34,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:25:34,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:25:34,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:25:34,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:25:33" (1/3) ... [2023-08-30 18:25:34,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c8f5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:25:34, skipping insertion in model container [2023-08-30 18:25:34,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:33" (2/3) ... [2023-08-30 18:25:34,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c8f5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:25:34, skipping insertion in model container [2023-08-30 18:25:34,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:25:34" (3/3) ... [2023-08-30 18:25:34,305 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-08-30 18:25:34,315 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:25:34,321 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:25:34,322 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:25:34,322 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:25:34,388 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 18:25:34,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 163 transitions, 342 flow [2023-08-30 18:25:34,493 INFO L130 PetriNetUnfolder]: 15/161 cut-off events. [2023-08-30 18:25:34,493 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:25:34,498 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. [2023-08-30 18:25:34,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 163 transitions, 342 flow [2023-08-30 18:25:34,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 153 transitions, 318 flow [2023-08-30 18:25:34,505 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:25:34,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 153 transitions, 318 flow [2023-08-30 18:25:34,516 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 153 transitions, 318 flow [2023-08-30 18:25:34,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 153 transitions, 318 flow [2023-08-30 18:25:34,545 INFO L130 PetriNetUnfolder]: 15/153 cut-off events. [2023-08-30 18:25:34,546 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:25:34,547 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. [2023-08-30 18:25:34,548 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-08-30 18:25:39,005 INFO L134 LiptonReduction]: Checked pairs total: 1281 [2023-08-30 18:25:39,006 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-30 18:25:39,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:25:39,024 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;@4d34a724, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:25:39,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 18:25:39,029 INFO L130 PetriNetUnfolder]: 5/18 cut-off events. [2023-08-30 18:25:39,029 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 18:25:39,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:39,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:39,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:39,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1496650072, now seen corresponding path program 1 times [2023-08-30 18:25:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:39,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208755400] [2023-08-30 18:25:39,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:39,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:39,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:39,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208755400] [2023-08-30 18:25:39,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208755400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:25:39,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:25:39,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 18:25:39,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559391768] [2023-08-30 18:25:39,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:25:39,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:25:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:39,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:25:39,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:25:39,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 324 [2023-08-30 18:25:39,610 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) [2023-08-30 18:25:39,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:39,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 324 [2023-08-30 18:25:39,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:39,681 INFO L130 PetriNetUnfolder]: 71/121 cut-off events. [2023-08-30 18:25:39,682 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 18:25:39,683 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. [2023-08-30 18:25:39,686 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 27 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2023-08-30 18:25:39,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 31 transitions, 145 flow [2023-08-30 18:25:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:25:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:25:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-30 18:25:39,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48662551440329216 [2023-08-30 18:25:39,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-30 18:25:39,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-30 18:25:39,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:39,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-30 18:25:39,721 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) [2023-08-30 18:25:39,729 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) [2023-08-30 18:25:39,730 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) [2023-08-30 18:25:39,731 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 50 flow. Second operand 3 states and 473 transitions. [2023-08-30 18:25:39,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 31 transitions, 145 flow [2023-08-30 18:25:39,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 18:25:39,736 INFO L231 Difference]: Finished difference. Result has 20 places, 21 transitions, 61 flow [2023-08-30 18:25:39,737 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} [2023-08-30 18:25:39,741 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-30 18:25:39,741 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 21 transitions, 61 flow [2023-08-30 18:25:39,741 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) [2023-08-30 18:25:39,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:39,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:39,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:25:39,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:39,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1210615754, now seen corresponding path program 1 times [2023-08-30 18:25:39,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:39,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014722745] [2023-08-30 18:25:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:39,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:39,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:39,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014722745] [2023-08-30 18:25:39,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014722745] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:25:39,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:25:39,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:25:39,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694999528] [2023-08-30 18:25:39,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:25:39,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:25:39,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:39,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:25:39,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:25:39,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2023-08-30 18:25:39,976 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) [2023-08-30 18:25:39,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:39,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2023-08-30 18:25:39,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:40,086 INFO L130 PetriNetUnfolder]: 125/225 cut-off events. [2023-08-30 18:25:40,091 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-08-30 18:25:40,092 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. [2023-08-30 18:25:40,093 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 36 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-30 18:25:40,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 186 flow [2023-08-30 18:25:40,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:25:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:25:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 585 transitions. [2023-08-30 18:25:40,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2023-08-30 18:25:40,097 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 585 transitions. [2023-08-30 18:25:40,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 585 transitions. [2023-08-30 18:25:40,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:40,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 585 transitions. [2023-08-30 18:25:40,099 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) [2023-08-30 18:25:40,102 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) [2023-08-30 18:25:40,103 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) [2023-08-30 18:25:40,103 INFO L175 Difference]: Start difference. First operand has 20 places, 21 transitions, 61 flow. Second operand 4 states and 585 transitions. [2023-08-30 18:25:40,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 186 flow [2023-08-30 18:25:40,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:25:40,104 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 80 flow [2023-08-30 18:25:40,105 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} [2023-08-30 18:25:40,105 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-08-30 18:25:40,105 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 80 flow [2023-08-30 18:25:40,106 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) [2023-08-30 18:25:40,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:40,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:40,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 18:25:40,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:40,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash 991297935, now seen corresponding path program 1 times [2023-08-30 18:25:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:40,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657216570] [2023-08-30 18:25:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:40,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:40,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:40,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657216570] [2023-08-30 18:25:40,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657216570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:25:40,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:25:40,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:25:40,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709221348] [2023-08-30 18:25:40,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:25:40,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:25:40,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:40,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:25:40,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:25:40,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2023-08-30 18:25:40,335 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) [2023-08-30 18:25:40,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:40,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2023-08-30 18:25:40,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:40,417 INFO L130 PetriNetUnfolder]: 81/151 cut-off events. [2023-08-30 18:25:40,418 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-08-30 18:25:40,420 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. [2023-08-30 18:25:40,421 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 20 selfloop transitions, 2 changer transitions 12/34 dead transitions. [2023-08-30 18:25:40,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 174 flow [2023-08-30 18:25:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:25:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:25:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 581 transitions. [2023-08-30 18:25:40,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44830246913580246 [2023-08-30 18:25:40,424 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 581 transitions. [2023-08-30 18:25:40,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 581 transitions. [2023-08-30 18:25:40,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:40,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 581 transitions. [2023-08-30 18:25:40,426 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) [2023-08-30 18:25:40,428 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) [2023-08-30 18:25:40,429 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) [2023-08-30 18:25:40,430 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 80 flow. Second operand 4 states and 581 transitions. [2023-08-30 18:25:40,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 174 flow [2023-08-30 18:25:40,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 168 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 18:25:40,433 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 74 flow [2023-08-30 18:25:40,433 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} [2023-08-30 18:25:40,433 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-08-30 18:25:40,434 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 74 flow [2023-08-30 18:25:40,434 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) [2023-08-30 18:25:40,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:40,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:40,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 18:25:40,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:40,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:40,435 INFO L85 PathProgramCache]: Analyzing trace with hash -369944271, now seen corresponding path program 1 times [2023-08-30 18:25:40,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:40,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243675227] [2023-08-30 18:25:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:40,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:25:40,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:40,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243675227] [2023-08-30 18:25:40,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243675227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:25:40,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:25:40,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:25:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680537548] [2023-08-30 18:25:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:25:40,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:25:40,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:25:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:25:40,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 324 [2023-08-30 18:25:40,591 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) [2023-08-30 18:25:40,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:40,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 324 [2023-08-30 18:25:40,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:40,680 INFO L130 PetriNetUnfolder]: 150/268 cut-off events. [2023-08-30 18:25:40,680 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-08-30 18:25:40,681 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. [2023-08-30 18:25:40,682 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 43 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-08-30 18:25:40,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 248 flow [2023-08-30 18:25:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:25:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:25:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2023-08-30 18:25:40,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2023-08-30 18:25:40,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 726 transitions. [2023-08-30 18:25:40,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 726 transitions. [2023-08-30 18:25:40,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:40,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 726 transitions. [2023-08-30 18:25:40,695 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) [2023-08-30 18:25:40,697 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) [2023-08-30 18:25:40,698 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) [2023-08-30 18:25:40,699 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 74 flow. Second operand 5 states and 726 transitions. [2023-08-30 18:25:40,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 248 flow [2023-08-30 18:25:40,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 49 transitions, 236 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-30 18:25:40,701 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 103 flow [2023-08-30 18:25:40,701 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} [2023-08-30 18:25:40,701 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-30 18:25:40,702 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 103 flow [2023-08-30 18:25:40,702 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) [2023-08-30 18:25:40,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:40,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:40,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 18:25:40,703 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:40,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:40,704 INFO L85 PathProgramCache]: Analyzing trace with hash 631656796, now seen corresponding path program 1 times [2023-08-30 18:25:40,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:40,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874643938] [2023-08-30 18:25:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:40,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:25:40,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:40,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874643938] [2023-08-30 18:25:40,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874643938] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:25:40,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:25:40,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:25:40,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992184202] [2023-08-30 18:25:40,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:25:40,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:25:40,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:40,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:25:40,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:25:40,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 324 [2023-08-30 18:25:40,858 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) [2023-08-30 18:25:40,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:40,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 324 [2023-08-30 18:25:40,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:40,948 INFO L130 PetriNetUnfolder]: 132/238 cut-off events. [2023-08-30 18:25:40,948 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-08-30 18:25:40,949 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. [2023-08-30 18:25:40,950 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 32 selfloop transitions, 5 changer transitions 10/47 dead transitions. [2023-08-30 18:25:40,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 258 flow [2023-08-30 18:25:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:25:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:25:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 724 transitions. [2023-08-30 18:25:40,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469135802469136 [2023-08-30 18:25:40,953 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 724 transitions. [2023-08-30 18:25:40,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 724 transitions. [2023-08-30 18:25:40,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:40,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 724 transitions. [2023-08-30 18:25:40,955 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) [2023-08-30 18:25:40,958 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) [2023-08-30 18:25:40,959 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) [2023-08-30 18:25:40,959 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 103 flow. Second operand 5 states and 724 transitions. [2023-08-30 18:25:40,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 258 flow [2023-08-30 18:25:40,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 47 transitions, 248 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 18:25:40,961 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 113 flow [2023-08-30 18:25:40,961 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} [2023-08-30 18:25:40,962 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-08-30 18:25:40,962 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 113 flow [2023-08-30 18:25:40,963 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) [2023-08-30 18:25:40,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:40,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:40,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 18:25:40,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:40,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:40,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1758776951, now seen corresponding path program 1 times [2023-08-30 18:25:40,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:40,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011666710] [2023-08-30 18:25:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:40,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:25:41,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:41,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011666710] [2023-08-30 18:25:41,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011666710] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:25:41,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447231461] [2023-08-30 18:25:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:41,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:25:41,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:25:41,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:25:41,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:25:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 18:25:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:25:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:25:41,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:25:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:25:41,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447231461] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:25:41,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:25:41,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-08-30 18:25:41,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701384639] [2023-08-30 18:25:41,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:25:41,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:25:41,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:41,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:25:41,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 18:25:41,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 324 [2023-08-30 18:25:41,616 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) [2023-08-30 18:25:41,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:41,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 324 [2023-08-30 18:25:41,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:41,732 INFO L130 PetriNetUnfolder]: 125/235 cut-off events. [2023-08-30 18:25:41,732 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2023-08-30 18:25:41,733 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. [2023-08-30 18:25:41,734 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 38 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-08-30 18:25:41,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 271 flow [2023-08-30 18:25:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:25:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:25:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 946 transitions. [2023-08-30 18:25:41,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41710758377425045 [2023-08-30 18:25:41,738 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 946 transitions. [2023-08-30 18:25:41,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 946 transitions. [2023-08-30 18:25:41,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:41,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 946 transitions. [2023-08-30 18:25:41,741 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) [2023-08-30 18:25:41,745 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) [2023-08-30 18:25:41,746 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) [2023-08-30 18:25:41,747 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 113 flow. Second operand 7 states and 946 transitions. [2023-08-30 18:25:41,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 271 flow [2023-08-30 18:25:41,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 262 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 18:25:41,751 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 136 flow [2023-08-30 18:25:41,752 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} [2023-08-30 18:25:41,754 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-08-30 18:25:41,754 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 136 flow [2023-08-30 18:25:41,756 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) [2023-08-30 18:25:41,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:41,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:41,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 18:25:41,964 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 [2023-08-30 18:25:41,965 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:41,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:41,965 INFO L85 PathProgramCache]: Analyzing trace with hash 721061444, now seen corresponding path program 1 times [2023-08-30 18:25:41,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:41,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450860168] [2023-08-30 18:25:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:41,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:42,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:42,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450860168] [2023-08-30 18:25:42,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450860168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:25:42,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380974942] [2023-08-30 18:25:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:42,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:25:42,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:25:42,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:25:42,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:25:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:25:42,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:25:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:42,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:25:43,081 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:25:43,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-30 18:25:43,109 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:25:43,110 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 [2023-08-30 18:25:43,117 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:25:43,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:25:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:43,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380974942] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:25:43,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:25:43,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 18 [2023-08-30 18:25:43,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391594333] [2023-08-30 18:25:43,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:25:43,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 18:25:43,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 18:25:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-30 18:25:43,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-30 18:25:43,706 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) [2023-08-30 18:25:43,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:43,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-30 18:25:43,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:43,983 INFO L130 PetriNetUnfolder]: 138/255 cut-off events. [2023-08-30 18:25:43,983 INFO L131 PetriNetUnfolder]: For 255/255 co-relation queries the response was YES. [2023-08-30 18:25:43,984 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. [2023-08-30 18:25:43,985 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 29 selfloop transitions, 11 changer transitions 4/44 dead transitions. [2023-08-30 18:25:43,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 278 flow [2023-08-30 18:25:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:25:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:25:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 954 transitions. [2023-08-30 18:25:43,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3680555555555556 [2023-08-30 18:25:43,989 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 954 transitions. [2023-08-30 18:25:43,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 954 transitions. [2023-08-30 18:25:43,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:43,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 954 transitions. [2023-08-30 18:25:43,991 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) [2023-08-30 18:25:43,995 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) [2023-08-30 18:25:43,996 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) [2023-08-30 18:25:43,996 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 136 flow. Second operand 8 states and 954 transitions. [2023-08-30 18:25:43,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 278 flow [2023-08-30 18:25:43,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 260 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 18:25:43,998 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 185 flow [2023-08-30 18:25:43,998 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} [2023-08-30 18:25:43,999 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-08-30 18:25:43,999 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 185 flow [2023-08-30 18:25:44,000 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) [2023-08-30 18:25:44,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:44,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:44,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 18:25:44,206 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 [2023-08-30 18:25:44,206 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:44,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:44,207 INFO L85 PathProgramCache]: Analyzing trace with hash -867319260, now seen corresponding path program 2 times [2023-08-30 18:25:44,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:44,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747849790] [2023-08-30 18:25:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:44,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:44,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:44,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747849790] [2023-08-30 18:25:44,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747849790] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:25:44,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68972741] [2023-08-30 18:25:44,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:25:44,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:25:44,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:25:44,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:25:44,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 18:25:44,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:25:44,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:25:44,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:25:44,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:25:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:45,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:25:45,116 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:25:45,117 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 [2023-08-30 18:25:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:45,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68972741] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:25:45,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:25:45,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-08-30 18:25:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431747258] [2023-08-30 18:25:45,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:25:45,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 18:25:45,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 18:25:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:25:45,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-30 18:25:45,643 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) [2023-08-30 18:25:45,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:45,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-30 18:25:45,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:45,858 INFO L130 PetriNetUnfolder]: 133/248 cut-off events. [2023-08-30 18:25:45,859 INFO L131 PetriNetUnfolder]: For 319/319 co-relation queries the response was YES. [2023-08-30 18:25:45,859 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. [2023-08-30 18:25:45,861 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 30 selfloop transitions, 10 changer transitions 7/47 dead transitions. [2023-08-30 18:25:45,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 346 flow [2023-08-30 18:25:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:25:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:25:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 953 transitions. [2023-08-30 18:25:45,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36766975308641975 [2023-08-30 18:25:45,865 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 953 transitions. [2023-08-30 18:25:45,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 953 transitions. [2023-08-30 18:25:45,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:45,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 953 transitions. [2023-08-30 18:25:45,868 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) [2023-08-30 18:25:45,872 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) [2023-08-30 18:25:45,873 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) [2023-08-30 18:25:45,873 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 185 flow. Second operand 8 states and 953 transitions. [2023-08-30 18:25:45,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 346 flow [2023-08-30 18:25:45,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 318 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 18:25:45,877 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 212 flow [2023-08-30 18:25:45,877 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} [2023-08-30 18:25:45,877 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-08-30 18:25:45,878 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 212 flow [2023-08-30 18:25:45,878 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) [2023-08-30 18:25:45,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:45,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:45,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 18:25:46,084 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 [2023-08-30 18:25:46,085 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:46,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:46,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1485650043, now seen corresponding path program 1 times [2023-08-30 18:25:46,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:46,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776016550] [2023-08-30 18:25:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:46,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:25:46,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:46,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776016550] [2023-08-30 18:25:46,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776016550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:25:46,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:25:46,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 18:25:46,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145728331] [2023-08-30 18:25:46,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:25:46,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 18:25:46,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:46,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 18:25:46,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:25:46,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 324 [2023-08-30 18:25:46,838 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) [2023-08-30 18:25:46,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:46,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 324 [2023-08-30 18:25:46,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:47,007 INFO L130 PetriNetUnfolder]: 126/239 cut-off events. [2023-08-30 18:25:47,007 INFO L131 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2023-08-30 18:25:47,008 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. [2023-08-30 18:25:47,009 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 30 selfloop transitions, 8 changer transitions 10/48 dead transitions. [2023-08-30 18:25:47,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 369 flow [2023-08-30 18:25:47,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:25:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:25:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 685 transitions. [2023-08-30 18:25:47,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228395061728395 [2023-08-30 18:25:47,012 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 685 transitions. [2023-08-30 18:25:47,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 685 transitions. [2023-08-30 18:25:47,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:47,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 685 transitions. [2023-08-30 18:25:47,014 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) [2023-08-30 18:25:47,017 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) [2023-08-30 18:25:47,017 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) [2023-08-30 18:25:47,017 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 212 flow. Second operand 5 states and 685 transitions. [2023-08-30 18:25:47,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 369 flow [2023-08-30 18:25:47,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 354 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 18:25:47,020 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 225 flow [2023-08-30 18:25:47,020 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} [2023-08-30 18:25:47,021 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-30 18:25:47,021 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 225 flow [2023-08-30 18:25:47,022 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) [2023-08-30 18:25:47,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:47,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:47,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 18:25:47,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:47,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash -708957346, now seen corresponding path program 3 times [2023-08-30 18:25:47,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:47,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290658171] [2023-08-30 18:25:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:47,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:47,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:47,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290658171] [2023-08-30 18:25:47,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290658171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:25:47,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782446057] [2023-08-30 18:25:47,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:25:47,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:25:47,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:25:47,524 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:25:47,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 18:25:47,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:25:47,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:25:47,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:25:47,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:25:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:47,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:25:47,947 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:25:47,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-30 18:25:47,970 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:25:47,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:25:47,978 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:25:47,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:25:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:48,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782446057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:25:48,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:25:48,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-08-30 18:25:48,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744481545] [2023-08-30 18:25:48,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:25:48,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:25:48,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:25:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:25:49,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-30 18:25:49,153 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) [2023-08-30 18:25:49,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:49,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-30 18:25:49,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:49,454 INFO L130 PetriNetUnfolder]: 135/253 cut-off events. [2023-08-30 18:25:49,454 INFO L131 PetriNetUnfolder]: For 424/424 co-relation queries the response was YES. [2023-08-30 18:25:49,455 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. [2023-08-30 18:25:49,456 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-08-30 18:25:49,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 371 flow [2023-08-30 18:25:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:25:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:25:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1051 transitions. [2023-08-30 18:25:49,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604252400548697 [2023-08-30 18:25:49,460 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1051 transitions. [2023-08-30 18:25:49,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1051 transitions. [2023-08-30 18:25:49,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:49,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1051 transitions. [2023-08-30 18:25:49,463 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) [2023-08-30 18:25:49,467 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) [2023-08-30 18:25:49,468 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) [2023-08-30 18:25:49,468 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 225 flow. Second operand 9 states and 1051 transitions. [2023-08-30 18:25:49,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 371 flow [2023-08-30 18:25:49,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 362 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:25:49,471 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 265 flow [2023-08-30 18:25:49,472 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} [2023-08-30 18:25:49,472 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-08-30 18:25:49,473 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 265 flow [2023-08-30 18:25:49,474 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) [2023-08-30 18:25:49,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:49,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:49,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 18:25:49,680 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 [2023-08-30 18:25:49,680 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:49,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1100878043, now seen corresponding path program 2 times [2023-08-30 18:25:49,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:49,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50231103] [2023-08-30 18:25:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:49,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:25:50,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:50,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50231103] [2023-08-30 18:25:50,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50231103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:25:50,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721619841] [2023-08-30 18:25:50,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:25:50,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:25:50,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:25:50,005 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:25:50,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 18:25:50,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:25:50,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:25:50,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 18:25:50,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:25:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:25:50,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:25:50,305 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:25:50,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-30 18:25:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:25:50,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721619841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:25:50,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:25:50,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-08-30 18:25:50,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93554200] [2023-08-30 18:25:50,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:25:50,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 18:25:50,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:50,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 18:25:50,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-30 18:25:50,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-30 18:25:50,609 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) [2023-08-30 18:25:50,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:50,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-30 18:25:50,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:50,745 INFO L130 PetriNetUnfolder]: 141/263 cut-off events. [2023-08-30 18:25:50,745 INFO L131 PetriNetUnfolder]: For 673/673 co-relation queries the response was YES. [2023-08-30 18:25:50,746 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. [2023-08-30 18:25:50,748 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 33 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2023-08-30 18:25:50,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 385 flow [2023-08-30 18:25:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:25:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:25:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 686 transitions. [2023-08-30 18:25:50,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42345679012345677 [2023-08-30 18:25:50,753 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 686 transitions. [2023-08-30 18:25:50,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 686 transitions. [2023-08-30 18:25:50,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:50,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 686 transitions. [2023-08-30 18:25:50,755 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) [2023-08-30 18:25:50,757 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) [2023-08-30 18:25:50,758 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) [2023-08-30 18:25:50,758 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 265 flow. Second operand 5 states and 686 transitions. [2023-08-30 18:25:50,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 385 flow [2023-08-30 18:25:50,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 360 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 18:25:50,763 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 274 flow [2023-08-30 18:25:50,763 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} [2023-08-30 18:25:50,763 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-08-30 18:25:50,764 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 274 flow [2023-08-30 18:25:50,764 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) [2023-08-30 18:25:50,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:50,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:50,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 18:25:50,971 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 [2023-08-30 18:25:50,972 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:50,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2141083410, now seen corresponding path program 4 times [2023-08-30 18:25:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:50,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285513970] [2023-08-30 18:25:50,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:50,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:51,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:51,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285513970] [2023-08-30 18:25:51,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285513970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:25:51,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980097479] [2023-08-30 18:25:51,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:25:51,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:25:51,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:25:51,599 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:25:51,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 18:25:51,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:25:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:25:51,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 18:25:51,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:25:51,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:25:51,861 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 [2023-08-30 18:25:52,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:25:52,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:25:52,022 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:25:52,023 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 [2023-08-30 18:25:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:25:52,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:25:52,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:25:52,361 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 [2023-08-30 18:25:52,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:25:52,374 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 [2023-08-30 18:25:52,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:25:52,383 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 [2023-08-30 18:25:52,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:25:52,417 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 [2023-08-30 18:25:52,485 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-30 18:25:52,485 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 [2023-08-30 18:25:52,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:25:52,516 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 [2023-08-30 18:25:52,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:25:52,560 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 [2023-08-30 18:25:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:25:54,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980097479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:25:54,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:25:54,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2023-08-30 18:25:54,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520591343] [2023-08-30 18:25:54,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:25:54,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:25:54,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:54,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:25:54,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=425, Unknown=6, NotChecked=0, Total=506 [2023-08-30 18:25:54,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-08-30 18:25:54,986 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) [2023-08-30 18:25:54,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:54,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-08-30 18:25:54,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:25:55,587 INFO L130 PetriNetUnfolder]: 172/329 cut-off events. [2023-08-30 18:25:55,587 INFO L131 PetriNetUnfolder]: For 819/819 co-relation queries the response was YES. [2023-08-30 18:25:55,588 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. [2023-08-30 18:25:55,590 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 45 selfloop transitions, 17 changer transitions 1/63 dead transitions. [2023-08-30 18:25:55,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 515 flow [2023-08-30 18:25:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:25:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:25:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 777 transitions. [2023-08-30 18:25:55,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2664609053497942 [2023-08-30 18:25:55,593 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 777 transitions. [2023-08-30 18:25:55,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 777 transitions. [2023-08-30 18:25:55,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:25:55,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 777 transitions. [2023-08-30 18:25:55,596 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) [2023-08-30 18:25:55,599 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) [2023-08-30 18:25:55,599 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) [2023-08-30 18:25:55,599 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 274 flow. Second operand 9 states and 777 transitions. [2023-08-30 18:25:55,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 515 flow [2023-08-30 18:25:55,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 497 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 18:25:55,604 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 336 flow [2023-08-30 18:25:55,604 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} [2023-08-30 18:25:55,606 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-08-30 18:25:55,606 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 336 flow [2023-08-30 18:25:55,607 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) [2023-08-30 18:25:55,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:25:55,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:25:55,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 18:25:55,814 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 [2023-08-30 18:25:55,814 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:25:55,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:25:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1109515910, now seen corresponding path program 5 times [2023-08-30 18:25:55,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:25:55,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306243775] [2023-08-30 18:25:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:25:55,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:25:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:25:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:56,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:25:56,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306243775] [2023-08-30 18:25:56,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306243775] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:25:56,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368017252] [2023-08-30 18:25:56,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:25:56,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:25:56,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:25:56,299 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:25:56,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 18:25:56,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:25:56,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:25:56,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 18:25:56,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:25:56,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:25:56,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:25:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:56,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:25:56,791 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 [2023-08-30 18:25:56,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:25:56,812 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 [2023-08-30 18:25:56,815 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 [2023-08-30 18:25:56,862 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-30 18:25:56,862 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 [2023-08-30 18:25:56,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:25:56,885 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 [2023-08-30 18:25:57,086 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:25:57,087 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 [2023-08-30 18:25:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:25:57,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368017252] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:25:57,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:25:57,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-08-30 18:25:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135164519] [2023-08-30 18:25:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:25:57,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 18:25:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:25:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 18:25:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=393, Unknown=1, NotChecked=40, Total=506 [2023-08-30 18:25:57,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-08-30 18:25:57,339 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) [2023-08-30 18:25:57,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:25:57,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-08-30 18:25:57,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:02,667 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) [2023-08-30 18:26:03,149 INFO L130 PetriNetUnfolder]: 164/297 cut-off events. [2023-08-30 18:26:03,149 INFO L131 PetriNetUnfolder]: For 1186/1186 co-relation queries the response was YES. [2023-08-30 18:26:03,150 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. [2023-08-30 18:26:03,152 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 30 selfloop transitions, 16 changer transitions 3/49 dead transitions. [2023-08-30 18:26:03,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 49 transitions, 476 flow [2023-08-30 18:26:03,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:26:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:26:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 879 transitions. [2023-08-30 18:26:03,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2712962962962963 [2023-08-30 18:26:03,155 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 879 transitions. [2023-08-30 18:26:03,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 879 transitions. [2023-08-30 18:26:03,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:03,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 879 transitions. [2023-08-30 18:26:03,158 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) [2023-08-30 18:26:03,161 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) [2023-08-30 18:26:03,162 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) [2023-08-30 18:26:03,162 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 336 flow. Second operand 10 states and 879 transitions. [2023-08-30 18:26:03,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 49 transitions, 476 flow [2023-08-30 18:26:03,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 49 transitions, 432 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-30 18:26:03,166 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 348 flow [2023-08-30 18:26:03,167 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} [2023-08-30 18:26:03,167 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-08-30 18:26:03,167 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 348 flow [2023-08-30 18:26:03,168 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) [2023-08-30 18:26:03,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:03,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:03,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:03,377 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 [2023-08-30 18:26:03,377 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:03,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:03,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1778420361, now seen corresponding path program 3 times [2023-08-30 18:26:03,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:03,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686158628] [2023-08-30 18:26:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:03,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:03,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:03,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686158628] [2023-08-30 18:26:03,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686158628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:03,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734280687] [2023-08-30 18:26:03,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:26:03,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:03,634 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) [2023-08-30 18:26:03,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 18:26:03,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:26:03,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:03,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 18:26:03,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:03,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:03,888 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:26:03,889 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 [2023-08-30 18:26:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:03,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734280687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:03,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:03,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-08-30 18:26:03,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957259966] [2023-08-30 18:26:03,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:03,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 18:26:03,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 18:26:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-30 18:26:04,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-30 18:26:04,241 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) [2023-08-30 18:26:04,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:04,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-30 18:26:04,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:04,385 INFO L130 PetriNetUnfolder]: 168/301 cut-off events. [2023-08-30 18:26:04,385 INFO L131 PetriNetUnfolder]: For 953/953 co-relation queries the response was YES. [2023-08-30 18:26:04,386 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. [2023-08-30 18:26:04,388 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 43 selfloop transitions, 13 changer transitions 0/56 dead transitions. [2023-08-30 18:26:04,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 541 flow [2023-08-30 18:26:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:26:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:26:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 821 transitions. [2023-08-30 18:26:04,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42232510288065844 [2023-08-30 18:26:04,391 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 821 transitions. [2023-08-30 18:26:04,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 821 transitions. [2023-08-30 18:26:04,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:04,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 821 transitions. [2023-08-30 18:26:04,393 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) [2023-08-30 18:26:04,396 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) [2023-08-30 18:26:04,396 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) [2023-08-30 18:26:04,396 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 348 flow. Second operand 6 states and 821 transitions. [2023-08-30 18:26:04,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 541 flow [2023-08-30 18:26:04,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 505 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-08-30 18:26:04,404 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 352 flow [2023-08-30 18:26:04,404 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} [2023-08-30 18:26:04,405 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-08-30 18:26:04,405 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 352 flow [2023-08-30 18:26:04,405 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) [2023-08-30 18:26:04,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:04,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:04,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 18:26:04,611 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 [2023-08-30 18:26:04,612 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:04,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:04,612 INFO L85 PathProgramCache]: Analyzing trace with hash -292123197, now seen corresponding path program 4 times [2023-08-30 18:26:04,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:04,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496390452] [2023-08-30 18:26:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:04,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:04,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:04,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496390452] [2023-08-30 18:26:04,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496390452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:04,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147389763] [2023-08-30 18:26:04,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:26:04,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:04,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:04,941 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:04,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 18:26:05,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:26:05,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:05,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 18:26:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:26:05,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:26:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:05,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:05,297 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 [2023-08-30 18:26:05,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:26:05,332 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 [2023-08-30 18:26:05,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:26:05,350 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 [2023-08-30 18:26:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:05,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147389763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:05,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:05,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2023-08-30 18:26:05,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301969837] [2023-08-30 18:26:05,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:05,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:26:05,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:26:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=220, Unknown=1, NotChecked=30, Total=306 [2023-08-30 18:26:06,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-08-30 18:26:06,049 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) [2023-08-30 18:26:06,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:06,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-08-30 18:26:06,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:06,264 INFO L130 PetriNetUnfolder]: 158/281 cut-off events. [2023-08-30 18:26:06,265 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2023-08-30 18:26:06,266 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. [2023-08-30 18:26:06,269 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 38 selfloop transitions, 12 changer transitions 0/50 dead transitions. [2023-08-30 18:26:06,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 492 flow [2023-08-30 18:26:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:26:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:26:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 682 transitions. [2023-08-30 18:26:06,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3508230452674897 [2023-08-30 18:26:06,273 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 682 transitions. [2023-08-30 18:26:06,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 682 transitions. [2023-08-30 18:26:06,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:06,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 682 transitions. [2023-08-30 18:26:06,275 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) [2023-08-30 18:26:06,277 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) [2023-08-30 18:26:06,277 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) [2023-08-30 18:26:06,277 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 352 flow. Second operand 6 states and 682 transitions. [2023-08-30 18:26:06,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 492 flow [2023-08-30 18:26:06,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 446 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-30 18:26:06,284 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 337 flow [2023-08-30 18:26:06,285 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} [2023-08-30 18:26:06,285 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-08-30 18:26:06,285 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 337 flow [2023-08-30 18:26:06,286 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) [2023-08-30 18:26:06,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:06,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:06,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:06,492 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 [2023-08-30 18:26:06,493 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:06,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:06,493 INFO L85 PathProgramCache]: Analyzing trace with hash -705701550, now seen corresponding path program 1 times [2023-08-30 18:26:06,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:06,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225417071] [2023-08-30 18:26:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:06,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:06,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225417071] [2023-08-30 18:26:06,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225417071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:06,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278643252] [2023-08-30 18:26:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:06,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:06,606 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:06,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 18:26:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:06,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 18:26:06,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:06,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:06,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278643252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:06,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:06,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-30 18:26:06,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611083883] [2023-08-30 18:26:06,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:06,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:26:06,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:06,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:26:06,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:26:06,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-08-30 18:26:06,912 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) [2023-08-30 18:26:06,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:06,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-08-30 18:26:06,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:07,054 INFO L130 PetriNetUnfolder]: 260/474 cut-off events. [2023-08-30 18:26:07,055 INFO L131 PetriNetUnfolder]: For 1455/1455 co-relation queries the response was YES. [2023-08-30 18:26:07,056 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. [2023-08-30 18:26:07,059 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 67 selfloop transitions, 17 changer transitions 2/86 dead transitions. [2023-08-30 18:26:07,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 86 transitions, 756 flow [2023-08-30 18:26:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:26:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:26:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1083 transitions. [2023-08-30 18:26:07,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775132275132275 [2023-08-30 18:26:07,062 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1083 transitions. [2023-08-30 18:26:07,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1083 transitions. [2023-08-30 18:26:07,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:07,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1083 transitions. [2023-08-30 18:26:07,065 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) [2023-08-30 18:26:07,068 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) [2023-08-30 18:26:07,069 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) [2023-08-30 18:26:07,069 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 337 flow. Second operand 7 states and 1083 transitions. [2023-08-30 18:26:07,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 86 transitions, 756 flow [2023-08-30 18:26:07,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 727 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 18:26:07,075 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 431 flow [2023-08-30 18:26:07,075 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} [2023-08-30 18:26:07,076 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-08-30 18:26:07,076 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 431 flow [2023-08-30 18:26:07,077 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) [2023-08-30 18:26:07,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:07,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:07,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:07,283 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 [2023-08-30 18:26:07,283 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:07,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:07,284 INFO L85 PathProgramCache]: Analyzing trace with hash -113070510, now seen corresponding path program 2 times [2023-08-30 18:26:07,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:07,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298890988] [2023-08-30 18:26:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:07,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:07,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:07,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298890988] [2023-08-30 18:26:07,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298890988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:07,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054522932] [2023-08-30 18:26:07,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:26:07,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:07,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:07,414 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:07,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 18:26:07,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:26:07,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:07,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 18:26:07,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:07,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:26:07,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054522932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:07,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:07,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-30 18:26:07,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229604861] [2023-08-30 18:26:07,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:07,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:26:07,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:07,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:26:07,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:26:07,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-08-30 18:26:07,682 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) [2023-08-30 18:26:07,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:07,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-08-30 18:26:07,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:07,874 INFO L130 PetriNetUnfolder]: 380/690 cut-off events. [2023-08-30 18:26:07,874 INFO L131 PetriNetUnfolder]: For 2640/2640 co-relation queries the response was YES. [2023-08-30 18:26:07,877 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. [2023-08-30 18:26:07,880 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 71 selfloop transitions, 18 changer transitions 2/91 dead transitions. [2023-08-30 18:26:07,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 91 transitions, 873 flow [2023-08-30 18:26:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:26:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:26:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1078 transitions. [2023-08-30 18:26:07,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2023-08-30 18:26:07,885 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1078 transitions. [2023-08-30 18:26:07,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1078 transitions. [2023-08-30 18:26:07,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:07,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1078 transitions. [2023-08-30 18:26:07,889 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) [2023-08-30 18:26:07,891 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) [2023-08-30 18:26:07,892 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) [2023-08-30 18:26:07,892 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 431 flow. Second operand 7 states and 1078 transitions. [2023-08-30 18:26:07,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 91 transitions, 873 flow [2023-08-30 18:26:07,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 847 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 18:26:07,898 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 563 flow [2023-08-30 18:26:07,898 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} [2023-08-30 18:26:07,899 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-08-30 18:26:07,899 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 563 flow [2023-08-30 18:26:07,899 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) [2023-08-30 18:26:07,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:07,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:07,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:08,105 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 [2023-08-30 18:26:08,105 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:08,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash -604771874, now seen corresponding path program 3 times [2023-08-30 18:26:08,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:08,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140317638] [2023-08-30 18:26:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:08,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:08,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:08,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140317638] [2023-08-30 18:26:08,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140317638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:08,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536108126] [2023-08-30 18:26:08,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:26:08,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:08,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:08,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:08,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 18:26:08,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:26:08,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:08,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 18:26:08,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:08,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:08,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536108126] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:08,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:08,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-30 18:26:08,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548523513] [2023-08-30 18:26:08,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:08,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 18:26:08,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 18:26:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-30 18:26:08,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-30 18:26:08,890 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) [2023-08-30 18:26:08,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:08,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-30 18:26:08,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:09,399 INFO L130 PetriNetUnfolder]: 987/1932 cut-off events. [2023-08-30 18:26:09,399 INFO L131 PetriNetUnfolder]: For 8382/8382 co-relation queries the response was YES. [2023-08-30 18:26:09,406 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. [2023-08-30 18:26:09,416 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 164 selfloop transitions, 51 changer transitions 3/218 dead transitions. [2023-08-30 18:26:09,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 218 transitions, 2360 flow [2023-08-30 18:26:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:26:09,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:26:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2054 transitions. [2023-08-30 18:26:09,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42263374485596705 [2023-08-30 18:26:09,420 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2054 transitions. [2023-08-30 18:26:09,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2054 transitions. [2023-08-30 18:26:09,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:09,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2054 transitions. [2023-08-30 18:26:09,423 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) [2023-08-30 18:26:09,429 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) [2023-08-30 18:26:09,430 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) [2023-08-30 18:26:09,430 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 563 flow. Second operand 15 states and 2054 transitions. [2023-08-30 18:26:09,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 218 transitions, 2360 flow [2023-08-30 18:26:09,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 218 transitions, 2259 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-08-30 18:26:09,448 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 1088 flow [2023-08-30 18:26:09,448 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} [2023-08-30 18:26:09,448 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-08-30 18:26:09,449 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 1088 flow [2023-08-30 18:26:09,449 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) [2023-08-30 18:26:09,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:09,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:09,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:09,655 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 [2023-08-30 18:26:09,656 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:09,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash -128575453, now seen corresponding path program 4 times [2023-08-30 18:26:09,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:09,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690129004] [2023-08-30 18:26:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:09,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:09,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:09,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690129004] [2023-08-30 18:26:09,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690129004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:09,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766990192] [2023-08-30 18:26:09,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:26:09,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:09,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:09,760 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:09,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 18:26:09,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:26:09,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:09,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 18:26:09,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:09,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:26:09,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766990192] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:09,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:09,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 18:26:09,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275828005] [2023-08-30 18:26:09,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:09,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:26:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:09,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:26:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-30 18:26:10,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 324 [2023-08-30 18:26:10,295 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) [2023-08-30 18:26:10,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:10,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 324 [2023-08-30 18:26:10,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:10,569 INFO L130 PetriNetUnfolder]: 705/1378 cut-off events. [2023-08-30 18:26:10,570 INFO L131 PetriNetUnfolder]: For 6998/6998 co-relation queries the response was YES. [2023-08-30 18:26:10,575 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. [2023-08-30 18:26:10,581 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 71 selfloop transitions, 3 changer transitions 42/116 dead transitions. [2023-08-30 18:26:10,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 116 transitions, 1432 flow [2023-08-30 18:26:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:26:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:26:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 834 transitions. [2023-08-30 18:26:10,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42901234567901236 [2023-08-30 18:26:10,583 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 834 transitions. [2023-08-30 18:26:10,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 834 transitions. [2023-08-30 18:26:10,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:10,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 834 transitions. [2023-08-30 18:26:10,585 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) [2023-08-30 18:26:10,587 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) [2023-08-30 18:26:10,587 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) [2023-08-30 18:26:10,588 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 1088 flow. Second operand 6 states and 834 transitions. [2023-08-30 18:26:10,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 116 transitions, 1432 flow [2023-08-30 18:26:10,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 116 transitions, 1393 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-30 18:26:10,604 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 746 flow [2023-08-30 18:26:10,605 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} [2023-08-30 18:26:10,605 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-08-30 18:26:10,605 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 746 flow [2023-08-30 18:26:10,606 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) [2023-08-30 18:26:10,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:10,606 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:10,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:10,812 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 [2023-08-30 18:26:10,812 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:10,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:10,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2055837313, now seen corresponding path program 5 times [2023-08-30 18:26:10,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:10,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965352244] [2023-08-30 18:26:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:10,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:26:10,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:10,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965352244] [2023-08-30 18:26:10,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965352244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:10,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702916001] [2023-08-30 18:26:10,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:26:10,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:10,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:10,992 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:11,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 18:26:11,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:26:11,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:26:11,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:11,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702916001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:11,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2023-08-30 18:26:11,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395986205] [2023-08-30 18:26:11,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:11,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 18:26:11,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 18:26:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-08-30 18:26:12,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 324 [2023-08-30 18:26:12,283 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) [2023-08-30 18:26:12,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:12,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 324 [2023-08-30 18:26:12,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:13,057 INFO L130 PetriNetUnfolder]: 675/1291 cut-off events. [2023-08-30 18:26:13,057 INFO L131 PetriNetUnfolder]: For 6858/6858 co-relation queries the response was YES. [2023-08-30 18:26:13,063 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. [2023-08-30 18:26:13,070 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 128 selfloop transitions, 60 changer transitions 22/210 dead transitions. [2023-08-30 18:26:13,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 210 transitions, 2209 flow [2023-08-30 18:26:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:26:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:26:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2895 transitions. [2023-08-30 18:26:13,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40614478114478114 [2023-08-30 18:26:13,074 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2895 transitions. [2023-08-30 18:26:13,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2895 transitions. [2023-08-30 18:26:13,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:13,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2895 transitions. [2023-08-30 18:26:13,079 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) [2023-08-30 18:26:13,085 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) [2023-08-30 18:26:13,086 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) [2023-08-30 18:26:13,086 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 746 flow. Second operand 22 states and 2895 transitions. [2023-08-30 18:26:13,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 210 transitions, 2209 flow [2023-08-30 18:26:13,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 210 transitions, 2107 flow, removed 48 selfloop flow, removed 8 redundant places. [2023-08-30 18:26:13,104 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 1201 flow [2023-08-30 18:26:13,105 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} [2023-08-30 18:26:13,105 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-08-30 18:26:13,105 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 1201 flow [2023-08-30 18:26:13,106 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) [2023-08-30 18:26:13,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:13,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:13,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:13,312 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 [2023-08-30 18:26:13,312 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:13,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:13,313 INFO L85 PathProgramCache]: Analyzing trace with hash -7138628, now seen corresponding path program 6 times [2023-08-30 18:26:13,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:13,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927018301] [2023-08-30 18:26:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:13,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:26:13,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:13,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927018301] [2023-08-30 18:26:13,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927018301] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:13,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262825941] [2023-08-30 18:26:13,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:26:13,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:13,403 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:13,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 18:26:13,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:26:13,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:13,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 18:26:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:26:13,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:26:13,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262825941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:13,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:13,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-30 18:26:13,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393438161] [2023-08-30 18:26:13,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:13,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 18:26:13,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:13,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 18:26:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-30 18:26:13,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 324 [2023-08-30 18:26:13,929 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) [2023-08-30 18:26:13,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:13,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 324 [2023-08-30 18:26:13,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:14,173 INFO L130 PetriNetUnfolder]: 503/945 cut-off events. [2023-08-30 18:26:14,174 INFO L131 PetriNetUnfolder]: For 6496/6496 co-relation queries the response was YES. [2023-08-30 18:26:14,178 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. [2023-08-30 18:26:14,183 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 76 selfloop transitions, 13 changer transitions 27/116 dead transitions. [2023-08-30 18:26:14,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 116 transitions, 1473 flow [2023-08-30 18:26:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:26:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:26:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1099 transitions. [2023-08-30 18:26:14,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42399691358024694 [2023-08-30 18:26:14,185 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1099 transitions. [2023-08-30 18:26:14,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1099 transitions. [2023-08-30 18:26:14,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:14,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1099 transitions. [2023-08-30 18:26:14,187 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) [2023-08-30 18:26:14,190 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) [2023-08-30 18:26:14,190 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) [2023-08-30 18:26:14,190 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 1201 flow. Second operand 8 states and 1099 transitions. [2023-08-30 18:26:14,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 116 transitions, 1473 flow [2023-08-30 18:26:14,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 116 transitions, 1405 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-08-30 18:26:14,207 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 861 flow [2023-08-30 18:26:14,208 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} [2023-08-30 18:26:14,208 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-08-30 18:26:14,208 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 861 flow [2023-08-30 18:26:14,209 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) [2023-08-30 18:26:14,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:14,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:14,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:14,415 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 [2023-08-30 18:26:14,415 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:14,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:14,416 INFO L85 PathProgramCache]: Analyzing trace with hash 943532550, now seen corresponding path program 7 times [2023-08-30 18:26:14,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:14,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017442727] [2023-08-30 18:26:14,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:14,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:15,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:15,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017442727] [2023-08-30 18:26:15,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017442727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:15,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716407906] [2023-08-30 18:26:15,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:26:15,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:15,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:15,137 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:15,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 18:26:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:15,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 18:26:15,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:15,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:15,805 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:26:15,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:26:15,849 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:26:15,849 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 [2023-08-30 18:26:15,864 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:26:15,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:26:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:16,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716407906] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:16,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:16,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-08-30 18:26:16,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671074089] [2023-08-30 18:26:16,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:16,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 18:26:16,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 18:26:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2023-08-30 18:26:18,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-30 18:26:18,530 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) [2023-08-30 18:26:18,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:18,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-30 18:26:18,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:19,099 INFO L130 PetriNetUnfolder]: 510/938 cut-off events. [2023-08-30 18:26:19,100 INFO L131 PetriNetUnfolder]: For 6783/6783 co-relation queries the response was YES. [2023-08-30 18:26:19,104 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. [2023-08-30 18:26:19,109 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 90 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2023-08-30 18:26:19,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 119 transitions, 1352 flow [2023-08-30 18:26:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:26:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:26:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1544 transitions. [2023-08-30 18:26:19,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36657169990503324 [2023-08-30 18:26:19,113 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1544 transitions. [2023-08-30 18:26:19,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1544 transitions. [2023-08-30 18:26:19,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:19,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1544 transitions. [2023-08-30 18:26:19,115 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) [2023-08-30 18:26:19,119 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) [2023-08-30 18:26:19,119 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) [2023-08-30 18:26:19,120 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 861 flow. Second operand 13 states and 1544 transitions. [2023-08-30 18:26:19,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 119 transitions, 1352 flow [2023-08-30 18:26:19,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 1298 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-30 18:26:19,139 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 1021 flow [2023-08-30 18:26:19,139 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} [2023-08-30 18:26:19,139 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-08-30 18:26:19,140 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 1021 flow [2023-08-30 18:26:19,140 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) [2023-08-30 18:26:19,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:19,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:19,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:19,346 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 [2023-08-30 18:26:19,347 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:19,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:19,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2133215393, now seen corresponding path program 1 times [2023-08-30 18:26:19,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:19,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983256396] [2023-08-30 18:26:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:19,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:19,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:19,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983256396] [2023-08-30 18:26:19,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983256396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:19,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35363485] [2023-08-30 18:26:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:19,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:19,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:19,704 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:19,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 18:26:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 18:26:19,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:19,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:20,042 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:26:20,043 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 [2023-08-30 18:26:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:20,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35363485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:20,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:20,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2023-08-30 18:26:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596557473] [2023-08-30 18:26:20,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 18:26:20,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 18:26:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-08-30 18:26:20,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-30 18:26:20,862 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) [2023-08-30 18:26:20,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:20,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-30 18:26:20,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:21,285 INFO L130 PetriNetUnfolder]: 517/968 cut-off events. [2023-08-30 18:26:21,286 INFO L131 PetriNetUnfolder]: For 8043/8043 co-relation queries the response was YES. [2023-08-30 18:26:21,289 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. [2023-08-30 18:26:21,293 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 101 selfloop transitions, 28 changer transitions 19/148 dead transitions. [2023-08-30 18:26:21,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 148 transitions, 1654 flow [2023-08-30 18:26:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:26:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:26:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1649 transitions. [2023-08-30 18:26:21,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42412551440329216 [2023-08-30 18:26:21,304 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1649 transitions. [2023-08-30 18:26:21,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1649 transitions. [2023-08-30 18:26:21,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:21,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1649 transitions. [2023-08-30 18:26:21,306 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) [2023-08-30 18:26:21,310 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) [2023-08-30 18:26:21,311 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) [2023-08-30 18:26:21,311 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 1021 flow. Second operand 12 states and 1649 transitions. [2023-08-30 18:26:21,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 148 transitions, 1654 flow [2023-08-30 18:26:21,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 148 transitions, 1577 flow, removed 16 selfloop flow, removed 9 redundant places. [2023-08-30 18:26:21,331 INFO L231 Difference]: Finished difference. Result has 107 places, 98 transitions, 1048 flow [2023-08-30 18:26:21,332 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} [2023-08-30 18:26:21,332 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 86 predicate places. [2023-08-30 18:26:21,332 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 98 transitions, 1048 flow [2023-08-30 18:26:21,333 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) [2023-08-30 18:26:21,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:21,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:21,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:21,539 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 [2023-08-30 18:26:21,540 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:21,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash -88608933, now seen corresponding path program 2 times [2023-08-30 18:26:21,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:21,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681232768] [2023-08-30 18:26:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:21,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:21,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:21,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681232768] [2023-08-30 18:26:21,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681232768] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:21,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88026760] [2023-08-30 18:26:21,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:26:21,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:21,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:21,886 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:21,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 18:26:21,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:26:21,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 18:26:21,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:22,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:22,270 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:26:22,271 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 [2023-08-30 18:26:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:22,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88026760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:22,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:22,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2023-08-30 18:26:22,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103066598] [2023-08-30 18:26:22,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:22,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:26:22,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:22,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:26:22,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:26:23,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-30 18:26:23,063 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) [2023-08-30 18:26:23,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:23,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-30 18:26:23,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:23,552 INFO L130 PetriNetUnfolder]: 539/992 cut-off events. [2023-08-30 18:26:23,552 INFO L131 PetriNetUnfolder]: For 8718/8718 co-relation queries the response was YES. [2023-08-30 18:26:23,555 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. [2023-08-30 18:26:23,559 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 102 selfloop transitions, 43 changer transitions 2/147 dead transitions. [2023-08-30 18:26:23,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1768 flow [2023-08-30 18:26:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:26:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:26:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1779 transitions. [2023-08-30 18:26:23,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42236467236467234 [2023-08-30 18:26:23,563 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1779 transitions. [2023-08-30 18:26:23,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1779 transitions. [2023-08-30 18:26:23,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:23,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1779 transitions. [2023-08-30 18:26:23,565 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) [2023-08-30 18:26:23,567 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) [2023-08-30 18:26:23,567 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) [2023-08-30 18:26:23,567 INFO L175 Difference]: Start difference. First operand has 107 places, 98 transitions, 1048 flow. Second operand 13 states and 1779 transitions. [2023-08-30 18:26:23,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1768 flow [2023-08-30 18:26:23,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 1705 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-30 18:26:23,589 INFO L231 Difference]: Finished difference. Result has 117 places, 110 transitions, 1262 flow [2023-08-30 18:26:23,589 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} [2023-08-30 18:26:23,589 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2023-08-30 18:26:23,590 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 110 transitions, 1262 flow [2023-08-30 18:26:23,590 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) [2023-08-30 18:26:23,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:23,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:23,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:23,796 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 [2023-08-30 18:26:23,796 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:23,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:23,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1583523661, now seen corresponding path program 3 times [2023-08-30 18:26:23,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:23,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708625979] [2023-08-30 18:26:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:23,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:24,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:24,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708625979] [2023-08-30 18:26:24,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708625979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:24,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119973816] [2023-08-30 18:26:24,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:26:24,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:24,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:24,189 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:24,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 18:26:24,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:26:24,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 18:26:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:24,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:26:24,469 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 [2023-08-30 18:26:24,502 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 [2023-08-30 18:26:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:26:24,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:24,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:26:24,775 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 [2023-08-30 18:26:24,821 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:26:24,821 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 [2023-08-30 18:26:24,854 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:26:24,855 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:26:24,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:26:24,874 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 [2023-08-30 18:26:24,897 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:26:24,899 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:26:24,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:26:24,917 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 [2023-08-30 18:26:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:26:26,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119973816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:26,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:26,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2023-08-30 18:26:26,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845758769] [2023-08-30 18:26:26,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:26,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:26:26,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:26,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:26:26,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=429, Unknown=8, NotChecked=0, Total=552 [2023-08-30 18:26:27,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 324 [2023-08-30 18:26:27,007 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) [2023-08-30 18:26:27,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:27,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 324 [2023-08-30 18:26:27,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:27,688 INFO L130 PetriNetUnfolder]: 585/1101 cut-off events. [2023-08-30 18:26:27,688 INFO L131 PetriNetUnfolder]: For 11783/11783 co-relation queries the response was YES. [2023-08-30 18:26:27,691 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. [2023-08-30 18:26:27,695 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 112 selfloop transitions, 43 changer transitions 23/178 dead transitions. [2023-08-30 18:26:27,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 178 transitions, 2142 flow [2023-08-30 18:26:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 18:26:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 18:26:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1866 transitions. [2023-08-30 18:26:27,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3031189083820663 [2023-08-30 18:26:27,697 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1866 transitions. [2023-08-30 18:26:27,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1866 transitions. [2023-08-30 18:26:27,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:27,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1866 transitions. [2023-08-30 18:26:27,699 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) [2023-08-30 18:26:27,702 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) [2023-08-30 18:26:27,702 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) [2023-08-30 18:26:27,703 INFO L175 Difference]: Start difference. First operand has 117 places, 110 transitions, 1262 flow. Second operand 19 states and 1866 transitions. [2023-08-30 18:26:27,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 178 transitions, 2142 flow [2023-08-30 18:26:27,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 178 transitions, 2048 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-08-30 18:26:27,733 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1412 flow [2023-08-30 18:26:27,733 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} [2023-08-30 18:26:27,733 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-08-30 18:26:27,734 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1412 flow [2023-08-30 18:26:27,734 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) [2023-08-30 18:26:27,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:27,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:27,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:27,940 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 [2023-08-30 18:26:27,941 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:27,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1313030174, now seen corresponding path program 8 times [2023-08-30 18:26:27,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:27,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71331315] [2023-08-30 18:26:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:27,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:28,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:28,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71331315] [2023-08-30 18:26:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71331315] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:28,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388571599] [2023-08-30 18:26:28,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:26:28,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:28,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:28,537 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:28,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 18:26:28,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:26:28,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:28,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 18:26:28,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:29,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:29,193 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:26:29,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:26:29,233 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:26:29,233 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 [2023-08-30 18:26:29,249 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:26:29,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:26:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:29,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388571599] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:29,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:29,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-30 18:26:29,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106626700] [2023-08-30 18:26:29,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 18:26:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 18:26:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 18:26:31,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-30 18:26:31,789 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) [2023-08-30 18:26:31,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:31,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-30 18:26:31,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:32,349 INFO L130 PetriNetUnfolder]: 565/1054 cut-off events. [2023-08-30 18:26:32,349 INFO L131 PetriNetUnfolder]: For 11383/11383 co-relation queries the response was YES. [2023-08-30 18:26:32,355 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. [2023-08-30 18:26:32,360 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 100 selfloop transitions, 27 changer transitions 2/129 dead transitions. [2023-08-30 18:26:32,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 129 transitions, 1750 flow [2023-08-30 18:26:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:26:32,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:26:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1651 transitions. [2023-08-30 18:26:32,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36397707231040566 [2023-08-30 18:26:32,362 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1651 transitions. [2023-08-30 18:26:32,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1651 transitions. [2023-08-30 18:26:32,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:32,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1651 transitions. [2023-08-30 18:26:32,365 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) [2023-08-30 18:26:32,368 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) [2023-08-30 18:26:32,368 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) [2023-08-30 18:26:32,368 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1412 flow. Second operand 14 states and 1651 transitions. [2023-08-30 18:26:32,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 129 transitions, 1750 flow [2023-08-30 18:26:32,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 129 transitions, 1679 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-08-30 18:26:32,398 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1401 flow [2023-08-30 18:26:32,398 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} [2023-08-30 18:26:32,399 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-08-30 18:26:32,399 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1401 flow [2023-08-30 18:26:32,399 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) [2023-08-30 18:26:32,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:32,399 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:32,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:32,605 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 [2023-08-30 18:26:32,606 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:32,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:32,606 INFO L85 PathProgramCache]: Analyzing trace with hash 456534228, now seen corresponding path program 9 times [2023-08-30 18:26:32,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:32,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413211774] [2023-08-30 18:26:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:32,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:33,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:33,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413211774] [2023-08-30 18:26:33,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413211774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:33,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147179457] [2023-08-30 18:26:33,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:26:33,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:33,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:33,157 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:33,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 18:26:33,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 18:26:33,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:33,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 18:26:33,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:33,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:33,854 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:26:33,855 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 [2023-08-30 18:26:33,878 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:26:33,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:26:33,887 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:26:33,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:26:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:34,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147179457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:34,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2023-08-30 18:26:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532278023] [2023-08-30 18:26:34,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 18:26:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 18:26:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-08-30 18:26:36,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-30 18:26:36,232 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) [2023-08-30 18:26:36,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:36,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-30 18:26:36,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:36,912 INFO L130 PetriNetUnfolder]: 588/1099 cut-off events. [2023-08-30 18:26:36,913 INFO L131 PetriNetUnfolder]: For 13894/13894 co-relation queries the response was YES. [2023-08-30 18:26:36,916 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. [2023-08-30 18:26:36,920 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 116 selfloop transitions, 37 changer transitions 5/158 dead transitions. [2023-08-30 18:26:36,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 158 transitions, 2061 flow [2023-08-30 18:26:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 18:26:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 18:26:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2019 transitions. [2023-08-30 18:26:36,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36655773420479304 [2023-08-30 18:26:36,924 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2019 transitions. [2023-08-30 18:26:36,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2019 transitions. [2023-08-30 18:26:36,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:36,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2019 transitions. [2023-08-30 18:26:36,927 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) [2023-08-30 18:26:36,930 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) [2023-08-30 18:26:36,931 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) [2023-08-30 18:26:36,931 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1401 flow. Second operand 17 states and 2019 transitions. [2023-08-30 18:26:36,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 158 transitions, 2061 flow [2023-08-30 18:26:36,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 158 transitions, 1997 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-08-30 18:26:36,962 INFO L231 Difference]: Finished difference. Result has 139 places, 121 transitions, 1509 flow [2023-08-30 18:26:36,962 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} [2023-08-30 18:26:36,962 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 118 predicate places. [2023-08-30 18:26:36,962 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 121 transitions, 1509 flow [2023-08-30 18:26:36,963 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) [2023-08-30 18:26:36,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:36,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:36,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:37,173 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 [2023-08-30 18:26:37,173 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:37,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1392949847, now seen corresponding path program 4 times [2023-08-30 18:26:37,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:37,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953452068] [2023-08-30 18:26:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:37,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:37,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:37,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953452068] [2023-08-30 18:26:37,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953452068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:37,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198020147] [2023-08-30 18:26:37,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:26:37,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:37,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:37,505 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:37,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 18:26:37,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:26:37,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:37,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 18:26:37,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:37,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:37,868 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:26:37,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-30 18:26:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:37,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198020147] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:37,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:37,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 17 [2023-08-30 18:26:37,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627177637] [2023-08-30 18:26:37,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:37,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:26:37,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:26:37,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:26:38,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-30 18:26:38,658 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) [2023-08-30 18:26:38,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:38,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-30 18:26:38,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:39,238 INFO L130 PetriNetUnfolder]: 632/1178 cut-off events. [2023-08-30 18:26:39,238 INFO L131 PetriNetUnfolder]: For 17245/17245 co-relation queries the response was YES. [2023-08-30 18:26:39,244 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. [2023-08-30 18:26:39,250 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 125 selfloop transitions, 52 changer transitions 3/180 dead transitions. [2023-08-30 18:26:39,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 180 transitions, 2468 flow [2023-08-30 18:26:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:26:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:26:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1923 transitions. [2023-08-30 18:26:39,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42394179894179895 [2023-08-30 18:26:39,253 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1923 transitions. [2023-08-30 18:26:39,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1923 transitions. [2023-08-30 18:26:39,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:39,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1923 transitions. [2023-08-30 18:26:39,256 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) [2023-08-30 18:26:39,259 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) [2023-08-30 18:26:39,260 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) [2023-08-30 18:26:39,260 INFO L175 Difference]: Start difference. First operand has 139 places, 121 transitions, 1509 flow. Second operand 14 states and 1923 transitions. [2023-08-30 18:26:39,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 180 transitions, 2468 flow [2023-08-30 18:26:39,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 180 transitions, 2372 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-08-30 18:26:39,299 INFO L231 Difference]: Finished difference. Result has 143 places, 126 transitions, 1612 flow [2023-08-30 18:26:39,299 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} [2023-08-30 18:26:39,305 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-08-30 18:26:39,305 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 1612 flow [2023-08-30 18:26:39,306 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) [2023-08-30 18:26:39,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:39,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:39,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:39,512 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 [2023-08-30 18:26:39,513 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:39,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:39,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1043539718, now seen corresponding path program 10 times [2023-08-30 18:26:39,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:39,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779057346] [2023-08-30 18:26:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:39,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:40,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:40,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779057346] [2023-08-30 18:26:40,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779057346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:40,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283285179] [2023-08-30 18:26:40,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:26:40,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:40,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:40,085 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:40,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 18:26:40,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:26:40,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:40,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 18:26:40,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:40,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:40,561 INFO L321 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-08-30 18:26:40,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2023-08-30 18:26:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:40,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283285179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:40,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:40,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-08-30 18:26:40,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431705638] [2023-08-30 18:26:40,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:40,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:26:40,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:40,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:26:40,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:26:42,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-30 18:26:42,094 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) [2023-08-30 18:26:42,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:42,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-30 18:26:42,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:42,817 INFO L130 PetriNetUnfolder]: 641/1206 cut-off events. [2023-08-30 18:26:42,817 INFO L131 PetriNetUnfolder]: For 18735/18735 co-relation queries the response was YES. [2023-08-30 18:26:42,821 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. [2023-08-30 18:26:42,825 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 121 selfloop transitions, 52 changer transitions 16/189 dead transitions. [2023-08-30 18:26:42,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 189 transitions, 2534 flow [2023-08-30 18:26:42,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 18:26:42,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 18:26:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2118 transitions. [2023-08-30 18:26:42,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3631687242798354 [2023-08-30 18:26:42,836 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2118 transitions. [2023-08-30 18:26:42,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2118 transitions. [2023-08-30 18:26:42,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:42,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2118 transitions. [2023-08-30 18:26:42,839 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) [2023-08-30 18:26:42,843 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) [2023-08-30 18:26:42,843 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) [2023-08-30 18:26:42,843 INFO L175 Difference]: Start difference. First operand has 143 places, 126 transitions, 1612 flow. Second operand 18 states and 2118 transitions. [2023-08-30 18:26:42,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 189 transitions, 2534 flow [2023-08-30 18:26:42,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 189 transitions, 2447 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-08-30 18:26:42,890 INFO L231 Difference]: Finished difference. Result has 158 places, 134 transitions, 1805 flow [2023-08-30 18:26:42,890 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} [2023-08-30 18:26:42,892 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2023-08-30 18:26:42,893 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 134 transitions, 1805 flow [2023-08-30 18:26:42,893 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) [2023-08-30 18:26:42,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:42,893 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:42,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:43,099 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 [2023-08-30 18:26:43,099 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:43,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:43,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2045874430, now seen corresponding path program 11 times [2023-08-30 18:26:43,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:43,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412278770] [2023-08-30 18:26:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:43,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:43,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:43,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412278770] [2023-08-30 18:26:43,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412278770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:43,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611036282] [2023-08-30 18:26:43,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:26:43,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:43,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:43,602 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:43,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 18:26:43,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:26:43,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:43,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 18:26:43,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:43,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:44,052 INFO L321 Elim1Store]: treesize reduction 35, result has 80.9 percent of original size [2023-08-30 18:26:44,052 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 [2023-08-30 18:26:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:26:44,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611036282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:44,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:44,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-08-30 18:26:44,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412119239] [2023-08-30 18:26:44,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:44,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:26:44,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:26:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:26:45,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-30 18:26:45,866 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) [2023-08-30 18:26:45,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:45,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-30 18:26:45,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:46,532 INFO L130 PetriNetUnfolder]: 637/1193 cut-off events. [2023-08-30 18:26:46,532 INFO L131 PetriNetUnfolder]: For 21843/21843 co-relation queries the response was YES. [2023-08-30 18:26:46,537 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. [2023-08-30 18:26:46,541 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 109 selfloop transitions, 50 changer transitions 7/166 dead transitions. [2023-08-30 18:26:46,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 166 transitions, 2387 flow [2023-08-30 18:26:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 18:26:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 18:26:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2024 transitions. [2023-08-30 18:26:46,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674655047204067 [2023-08-30 18:26:46,547 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2024 transitions. [2023-08-30 18:26:46,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2024 transitions. [2023-08-30 18:26:46,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:46,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2024 transitions. [2023-08-30 18:26:46,550 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) [2023-08-30 18:26:46,559 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) [2023-08-30 18:26:46,559 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) [2023-08-30 18:26:46,559 INFO L175 Difference]: Start difference. First operand has 158 places, 134 transitions, 1805 flow. Second operand 17 states and 2024 transitions. [2023-08-30 18:26:46,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 166 transitions, 2387 flow [2023-08-30 18:26:46,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 2253 flow, removed 45 selfloop flow, removed 9 redundant places. [2023-08-30 18:26:46,613 INFO L231 Difference]: Finished difference. Result has 166 places, 136 transitions, 1843 flow [2023-08-30 18:26:46,613 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} [2023-08-30 18:26:46,614 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2023-08-30 18:26:46,614 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 136 transitions, 1843 flow [2023-08-30 18:26:46,615 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) [2023-08-30 18:26:46,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:46,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:46,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:46,821 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 [2023-08-30 18:26:46,821 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:46,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash -962381630, now seen corresponding path program 12 times [2023-08-30 18:26:46,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:46,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059109134] [2023-08-30 18:26:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:46,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:47,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:47,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059109134] [2023-08-30 18:26:47,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059109134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:47,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874605831] [2023-08-30 18:26:47,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:26:47,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:47,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:47,385 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:47,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 18:26:47,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:26:47,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:47,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 18:26:47,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:47,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:48,086 INFO L321 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-08-30 18:26:48,086 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 [2023-08-30 18:26:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:26:52,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874605831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:52,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:52,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-08-30 18:26:52,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949093949] [2023-08-30 18:26:52,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:52,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:26:52,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:52,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:26:52,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:26:54,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-30 18:26:54,240 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) [2023-08-30 18:26:54,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:54,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-30 18:26:54,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:54,994 INFO L130 PetriNetUnfolder]: 681/1281 cut-off events. [2023-08-30 18:26:54,994 INFO L131 PetriNetUnfolder]: For 26071/26071 co-relation queries the response was YES. [2023-08-30 18:26:54,999 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. [2023-08-30 18:26:55,006 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 129 selfloop transitions, 66 changer transitions 12/207 dead transitions. [2023-08-30 18:26:55,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 207 transitions, 2873 flow [2023-08-30 18:26:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:26:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:26:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2640 transitions. [2023-08-30 18:26:55,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-08-30 18:26:55,046 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2640 transitions. [2023-08-30 18:26:55,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2640 transitions. [2023-08-30 18:26:55,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:55,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2640 transitions. [2023-08-30 18:26:55,050 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) [2023-08-30 18:26:55,054 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) [2023-08-30 18:26:55,055 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) [2023-08-30 18:26:55,055 INFO L175 Difference]: Start difference. First operand has 166 places, 136 transitions, 1843 flow. Second operand 22 states and 2640 transitions. [2023-08-30 18:26:55,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 207 transitions, 2873 flow [2023-08-30 18:26:55,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 207 transitions, 2769 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-08-30 18:26:55,113 INFO L231 Difference]: Finished difference. Result has 176 places, 144 transitions, 2063 flow [2023-08-30 18:26:55,113 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} [2023-08-30 18:26:55,113 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2023-08-30 18:26:55,114 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 144 transitions, 2063 flow [2023-08-30 18:26:55,114 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) [2023-08-30 18:26:55,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:55,114 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:55,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:55,320 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 [2023-08-30 18:26:55,321 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:55,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1900475021, now seen corresponding path program 5 times [2023-08-30 18:26:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:55,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670569873] [2023-08-30 18:26:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:55,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:55,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:55,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670569873] [2023-08-30 18:26:55,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670569873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:55,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71940664] [2023-08-30 18:26:55,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:26:55,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:55,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:55,633 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:55,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 18:26:55,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 18:26:55,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:26:55,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 18:26:55,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:55,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:55,969 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:26:55,970 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 [2023-08-30 18:26:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:26:56,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71940664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:56,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:56,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 15 [2023-08-30 18:26:56,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514712141] [2023-08-30 18:26:56,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:56,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 18:26:56,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:56,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 18:26:56,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-08-30 18:26:56,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-30 18:26:56,549 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) [2023-08-30 18:26:56,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:26:56,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-30 18:26:56,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:26:57,130 INFO L130 PetriNetUnfolder]: 775/1447 cut-off events. [2023-08-30 18:26:57,131 INFO L131 PetriNetUnfolder]: For 36374/36374 co-relation queries the response was YES. [2023-08-30 18:26:57,137 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. [2023-08-30 18:26:57,142 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 177 selfloop transitions, 49 changer transitions 1/227 dead transitions. [2023-08-30 18:26:57,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 3627 flow [2023-08-30 18:26:57,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 18:26:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 18:26:57,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2318 transitions. [2023-08-30 18:26:57,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42084241103848946 [2023-08-30 18:26:57,145 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2318 transitions. [2023-08-30 18:26:57,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2318 transitions. [2023-08-30 18:26:57,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:26:57,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2318 transitions. [2023-08-30 18:26:57,148 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) [2023-08-30 18:26:57,151 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) [2023-08-30 18:26:57,152 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) [2023-08-30 18:26:57,152 INFO L175 Difference]: Start difference. First operand has 176 places, 144 transitions, 2063 flow. Second operand 17 states and 2318 transitions. [2023-08-30 18:26:57,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 3627 flow [2023-08-30 18:26:57,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 227 transitions, 3485 flow, removed 30 selfloop flow, removed 15 redundant places. [2023-08-30 18:26:57,247 INFO L231 Difference]: Finished difference. Result has 183 places, 163 transitions, 2288 flow [2023-08-30 18:26:57,247 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} [2023-08-30 18:26:57,247 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2023-08-30 18:26:57,247 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 163 transitions, 2288 flow [2023-08-30 18:26:57,248 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) [2023-08-30 18:26:57,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:26:57,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:26:57,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 18:26:57,448 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 [2023-08-30 18:26:57,448 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:26:57,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:26:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1115989726, now seen corresponding path program 13 times [2023-08-30 18:26:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:26:57,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68651803] [2023-08-30 18:26:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:26:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:26:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:58,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:26:58,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68651803] [2023-08-30 18:26:58,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68651803] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:26:58,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139175133] [2023-08-30 18:26:58,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:26:58,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:26:58,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:26:58,009 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:26:58,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 18:26:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:26:58,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 18:26:58,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:26:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:58,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:26:58,545 INFO L321 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-08-30 18:26:58,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 86 [2023-08-30 18:26:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:26:58,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139175133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:26:58,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:26:58,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-08-30 18:26:58,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921040942] [2023-08-30 18:26:58,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:26:58,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 18:26:58,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:26:58,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 18:26:58,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2023-08-30 18:27:01,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 324 [2023-08-30 18:27:01,008 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) [2023-08-30 18:27:01,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:27:01,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 324 [2023-08-30 18:27:01,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:27:01,582 INFO L130 PetriNetUnfolder]: 776/1457 cut-off events. [2023-08-30 18:27:01,582 INFO L131 PetriNetUnfolder]: For 36803/36803 co-relation queries the response was YES. [2023-08-30 18:27:01,590 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. [2023-08-30 18:27:01,594 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 147 selfloop transitions, 19 changer transitions 13/179 dead transitions. [2023-08-30 18:27:01,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 179 transitions, 2814 flow [2023-08-30 18:27:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:27:01,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:27:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1514 transitions. [2023-08-30 18:27:01,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944919278252613 [2023-08-30 18:27:01,597 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1514 transitions. [2023-08-30 18:27:01,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1514 transitions. [2023-08-30 18:27:01,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:27:01,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1514 transitions. [2023-08-30 18:27:01,599 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) [2023-08-30 18:27:01,601 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) [2023-08-30 18:27:01,601 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) [2023-08-30 18:27:01,601 INFO L175 Difference]: Start difference. First operand has 183 places, 163 transitions, 2288 flow. Second operand 13 states and 1514 transitions. [2023-08-30 18:27:01,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 179 transitions, 2814 flow [2023-08-30 18:27:01,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 179 transitions, 2655 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-08-30 18:27:01,679 INFO L231 Difference]: Finished difference. Result has 188 places, 163 transitions, 2201 flow [2023-08-30 18:27:01,679 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} [2023-08-30 18:27:01,679 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2023-08-30 18:27:01,679 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 163 transitions, 2201 flow [2023-08-30 18:27:01,680 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) [2023-08-30 18:27:01,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:27:01,680 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:27:01,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 18:27:01,880 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 [2023-08-30 18:27:01,881 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:27:01,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:27:01,881 INFO L85 PathProgramCache]: Analyzing trace with hash 966105765, now seen corresponding path program 6 times [2023-08-30 18:27:01,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:27:01,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430337897] [2023-08-30 18:27:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:27:01,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:27:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:27:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:27:02,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:27:02,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430337897] [2023-08-30 18:27:02,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430337897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:27:02,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581817299] [2023-08-30 18:27:02,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:27:02,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:27:02,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:27:02,207 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:27:02,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 18:27:02,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 18:27:02,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:27:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-30 18:27:02,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:27:02,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:27:02,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:27:02,372 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:27:02,372 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 [2023-08-30 18:27:02,442 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 [2023-08-30 18:27:02,490 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:27:02,491 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 [2023-08-30 18:27:02,521 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 [2023-08-30 18:27:02,547 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 [2023-08-30 18:27:02,578 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 [2023-08-30 18:27:02,607 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 [2023-08-30 18:27:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:27:02,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:27:03,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:27:03,403 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 [2023-08-30 18:27:03,478 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:27:03,480 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 [2023-08-30 18:27:04,083 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:27:04,086 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:27:04,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:27:04,115 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 [2023-08-30 18:27:04,161 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:27:04,163 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:27:04,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:27:04,188 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 [2023-08-30 18:27:04,236 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:27:04,238 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:27:04,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:27:04,259 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 [2023-08-30 18:27:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:27:10,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581817299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:27:10,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:27:10,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2023-08-30 18:27:10,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818443266] [2023-08-30 18:27:10,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:27:10,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 18:27:10,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:27:10,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 18:27:10,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=757, Unknown=20, NotChecked=0, Total=930 [2023-08-30 18:27:12,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 324 [2023-08-30 18:27:12,639 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) [2023-08-30 18:27:12,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:27:12,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 324 [2023-08-30 18:27:12,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:27:17,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:27:17,768 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~i_AB~0 4))) (let ((.cse2 (* c_~i_BA~0 4)) (.cse18 (select |c_#memory_int| c_~A~0.base)) (.cse10 (+ c_~A~0.offset 4 .cse4))) (let ((.cse5 (select .cse18 .cse10)) (.cse0 (<= c_~An~0 c_~i_BA~0)) (.cse3 (select .cse18 (+ c_~A~0.offset .cse2))) (.cse9 (+ c_~i_BA~0 1))) (and (or .cse0 (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse1 (select |c_#memory_int| ~B~0.base))) (or (not (= (select .cse1 (+ .cse2 ~B~0.offset)) .cse3)) (= (select .cse1 (+ ~B~0.offset 4 .cse4)) .cse5))))) (forall ((~B~0.offset Int) (v_ArrVal_1297 (Array Int Int)) (v_ArrVal_1296 (Array Int Int)) (~B~0.base Int) (v_~i_BA~0_100 Int) (v_ArrVal_1295 (Array Int Int))) (let ((.cse11 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_1295) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1296) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1297))) (let ((.cse8 (select .cse11 c_~A~0.base)) (.cse6 (select .cse11 ~B~0.base))) (or (<= c_~An~0 v_~i_BA~0_100) (not (let ((.cse7 (* 4 v_~i_BA~0_100))) (= (select .cse6 (+ ~B~0.offset .cse7)) (select .cse8 (+ c_~A~0.offset .cse7))))) (< v_~i_BA~0_100 .cse9) (= (select .cse8 .cse10) (select .cse6 (+ ~B~0.offset 4 .cse4))))))) (forall ((~B~0.offset Int) (v_ArrVal_1297 (Array Int Int)) (v_ArrVal_1296 (Array Int Int)) (~B~0.base Int) (v_~i_BA~0_100 Int)) (let ((.cse15 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1296) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1297))) (let ((.cse12 (select .cse15 ~B~0.base)) (.cse13 (select .cse15 c_~A~0.base))) (or (<= c_~An~0 v_~i_BA~0_100) (< v_~i_BA~0_100 .cse9) (= (select .cse12 (+ ~B~0.offset 4 .cse4)) (select .cse13 .cse10)) (not (let ((.cse14 (* 4 v_~i_BA~0_100))) (= (select .cse12 (+ ~B~0.offset .cse14)) (select .cse13 (+ c_~A~0.offset .cse14))))))))) (forall ((v_~i_BA~0_100 Int)) (or (<= c_~An~0 v_~i_BA~0_100) (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse16 (select |c_#memory_int| ~B~0.base))) (or (not (let ((.cse17 (* 4 v_~i_BA~0_100))) (= (select .cse16 (+ ~B~0.offset .cse17)) (select .cse18 (+ c_~A~0.offset .cse17))))) (= (select .cse16 (+ ~B~0.offset 4 .cse4)) .cse5)))) (< v_~i_BA~0_100 .cse9))) (forall ((~B~0.offset Int) (v_ArrVal_1297 (Array Int Int)) (v_~i_BA~0_100 Int) (~B~0.base Int)) (let ((.cse22 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1297))) (let ((.cse20 (select .cse22 ~B~0.base)) (.cse19 (select .cse22 c_~A~0.base))) (or (<= c_~An~0 v_~i_BA~0_100) (= (select .cse19 .cse10) (select .cse20 (+ ~B~0.offset 4 .cse4))) (not (let ((.cse21 (* 4 v_~i_BA~0_100))) (= (select .cse20 (+ ~B~0.offset .cse21)) (select .cse19 (+ c_~A~0.offset .cse21))))) (< v_~i_BA~0_100 .cse9))))) (or .cse0 (forall ((~B~0.offset Int) (~B~0.base Int)) (let ((.cse23 (select |c_#memory_int| ~B~0.base))) (or (not (= (select .cse23 (+ .cse2 ~B~0.offset)) .cse3)) (= (select .cse23 (+ ~B~0.offset .cse4)) (select .cse18 (+ c_~A~0.offset .cse4))))))) (or .cse0 (not (= .cse3 (select (select |c_#memory_int| c_~B~0.base) (+ .cse2 c_~B~0.offset))))) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_114| Int)) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_114|) 0))) (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse24 (< c_~An~0 (+ c_~i_BA~0 2)))) (and (or (< c_~An~0 (+ c_~i_AB~0 3)) .cse24) (or .cse24 (< c_~i_AB~0 .cse9))))))))) is different from false [2023-08-30 18:27:20,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:27:23,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:27:25,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:27:25,823 INFO L130 PetriNetUnfolder]: 1090/2119 cut-off events. [2023-08-30 18:27:25,823 INFO L131 PetriNetUnfolder]: For 66805/66805 co-relation queries the response was YES. [2023-08-30 18:27:25,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17875 conditions, 2119 events. 1090/2119 cut-off events. For 66805/66805 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12827 event pairs, 177 based on Foata normal form. 94/2213 useless extension candidates. Maximal degree in co-relation 17298. Up to 1355 conditions per place. [2023-08-30 18:27:25,842 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 275 selfloop transitions, 79 changer transitions 13/367 dead transitions. [2023-08-30 18:27:25,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 367 transitions, 5450 flow [2023-08-30 18:27:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 18:27:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 18:27:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3308 transitions. [2023-08-30 18:27:25,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2686809616634178 [2023-08-30 18:27:25,846 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3308 transitions. [2023-08-30 18:27:25,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3308 transitions. [2023-08-30 18:27:25,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:27:25,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3308 transitions. [2023-08-30 18:27:25,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 87.05263157894737) internal successors, (3308), 38 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:27:25,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 324.0) internal successors, (12636), 39 states have internal predecessors, (12636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:27:25,860 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 324.0) internal successors, (12636), 39 states have internal predecessors, (12636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:27:25,860 INFO L175 Difference]: Start difference. First operand has 188 places, 163 transitions, 2201 flow. Second operand 38 states and 3308 transitions. [2023-08-30 18:27:25,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 367 transitions, 5450 flow [2023-08-30 18:27:25,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 367 transitions, 5340 flow, removed 20 selfloop flow, removed 11 redundant places. [2023-08-30 18:27:25,997 INFO L231 Difference]: Finished difference. Result has 228 places, 224 transitions, 3388 flow [2023-08-30 18:27:25,997 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=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3388, PETRI_PLACES=228, PETRI_TRANSITIONS=224} [2023-08-30 18:27:25,997 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2023-08-30 18:27:25,997 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 224 transitions, 3388 flow [2023-08-30 18:27:25,998 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) [2023-08-30 18:27:25,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:27:25,998 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:27:26,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 18:27:26,198 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 [2023-08-30 18:27:26,198 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:27:26,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:27:26,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1637860844, now seen corresponding path program 14 times [2023-08-30 18:27:26,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:27:26,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204205468] [2023-08-30 18:27:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:27:26,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:27:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:27:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:27:26,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:27:26,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204205468] [2023-08-30 18:27:26,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204205468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:27:26,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004272441] [2023-08-30 18:27:26,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:27:26,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:27:26,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:27:26,724 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:27:26,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 18:27:26,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:27:26,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:27:26,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 18:27:26,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:27:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:27:27,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:27:27,268 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-30 18:27:27,268 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 [2023-08-30 18:27:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:27:27,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004272441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:27:27,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:27:27,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-30 18:27:27,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034271737] [2023-08-30 18:27:27,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:27:27,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 18:27:27,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:27:27,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 18:27:27,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 18:27:29,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-30 18:27:29,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 224 transitions, 3388 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) [2023-08-30 18:27:29,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:27:29,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-30 18:27:29,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:27:29,880 INFO L130 PetriNetUnfolder]: 1076/2091 cut-off events. [2023-08-30 18:27:29,881 INFO L131 PetriNetUnfolder]: For 74917/74917 co-relation queries the response was YES. [2023-08-30 18:27:29,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19382 conditions, 2091 events. 1076/2091 cut-off events. For 74917/74917 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12555 event pairs, 326 based on Foata normal form. 4/2095 useless extension candidates. Maximal degree in co-relation 18755. Up to 1983 conditions per place. [2023-08-30 18:27:29,902 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 191 selfloop transitions, 41 changer transitions 3/235 dead transitions. [2023-08-30 18:27:29,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 235 transitions, 3983 flow [2023-08-30 18:27:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:27:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:27:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1499 transitions. [2023-08-30 18:27:29,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35588793922127254 [2023-08-30 18:27:29,904 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1499 transitions. [2023-08-30 18:27:29,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1499 transitions. [2023-08-30 18:27:29,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:27:29,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1499 transitions. [2023-08-30 18:27:29,906 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) [2023-08-30 18:27:29,908 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) [2023-08-30 18:27:29,908 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) [2023-08-30 18:27:29,908 INFO L175 Difference]: Start difference. First operand has 228 places, 224 transitions, 3388 flow. Second operand 13 states and 1499 transitions. [2023-08-30 18:27:29,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 235 transitions, 3983 flow [2023-08-30 18:27:30,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 235 transitions, 3567 flow, removed 181 selfloop flow, removed 6 redundant places. [2023-08-30 18:27:30,066 INFO L231 Difference]: Finished difference. Result has 234 places, 227 transitions, 3152 flow [2023-08-30 18:27:30,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3152, PETRI_PLACES=234, PETRI_TRANSITIONS=227} [2023-08-30 18:27:30,067 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2023-08-30 18:27:30,067 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 227 transitions, 3152 flow [2023-08-30 18:27:30,068 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) [2023-08-30 18:27:30,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:27:30,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:27:30,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 18:27:30,268 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 [2023-08-30 18:27:30,268 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:27:30,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:27:30,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1833946803, now seen corresponding path program 7 times [2023-08-30 18:27:30,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:27:30,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667800138] [2023-08-30 18:27:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:27:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:27:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:27:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:27:30,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:27:30,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667800138] [2023-08-30 18:27:30,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667800138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:27:30,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107884637] [2023-08-30 18:27:30,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:27:30,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:27:30,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:27:30,599 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:27:30,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 18:27:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:27:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 18:27:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:27:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:27:30,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:27:31,015 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:27:31,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-30 18:27:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:27:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107884637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:27:31,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:27:31,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 5] total 20 [2023-08-30 18:27:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588830402] [2023-08-30 18:27:31,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:27:31,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 18:27:31,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:27:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 18:27:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-30 18:27:31,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-30 18:27:31,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 227 transitions, 3152 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) [2023-08-30 18:27:31,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:27:31,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-30 18:27:31,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:27:32,752 INFO L130 PetriNetUnfolder]: 1136/2205 cut-off events. [2023-08-30 18:27:32,753 INFO L131 PetriNetUnfolder]: For 80060/80060 co-relation queries the response was YES. [2023-08-30 18:27:32,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19559 conditions, 2205 events. 1136/2205 cut-off events. For 80060/80060 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13406 event pairs, 258 based on Foata normal form. 28/2233 useless extension candidates. Maximal degree in co-relation 19446. Up to 1636 conditions per place. [2023-08-30 18:27:32,772 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 203 selfloop transitions, 95 changer transitions 7/305 dead transitions. [2023-08-30 18:27:32,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 305 transitions, 4863 flow [2023-08-30 18:27:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 18:27:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 18:27:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2633 transitions. [2023-08-30 18:27:32,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40632716049382717 [2023-08-30 18:27:32,776 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2633 transitions. [2023-08-30 18:27:32,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2633 transitions. [2023-08-30 18:27:32,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:27:32,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2633 transitions. [2023-08-30 18:27:32,778 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) [2023-08-30 18:27:32,781 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) [2023-08-30 18:27:32,782 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) [2023-08-30 18:27:32,782 INFO L175 Difference]: Start difference. First operand has 234 places, 227 transitions, 3152 flow. Second operand 20 states and 2633 transitions. [2023-08-30 18:27:32,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 305 transitions, 4863 flow [2023-08-30 18:27:32,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 305 transitions, 4703 flow, removed 45 selfloop flow, removed 10 redundant places. [2023-08-30 18:27:32,931 INFO L231 Difference]: Finished difference. Result has 242 places, 251 transitions, 3615 flow [2023-08-30 18:27:32,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3019, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3615, PETRI_PLACES=242, PETRI_TRANSITIONS=251} [2023-08-30 18:27:32,932 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 221 predicate places. [2023-08-30 18:27:32,932 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 251 transitions, 3615 flow [2023-08-30 18:27:32,933 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) [2023-08-30 18:27:32,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:27:32,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:27:32,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 18:27:33,139 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 [2023-08-30 18:27:33,139 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:27:33,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:27:33,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1288803642, now seen corresponding path program 15 times [2023-08-30 18:27:33,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:27:33,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546900407] [2023-08-30 18:27:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:27:33,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:27:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:27:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:27:33,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:27:33,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546900407] [2023-08-30 18:27:33,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546900407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:27:33,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461394788] [2023-08-30 18:27:33,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:27:33,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:27:33,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:27:33,704 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:27:33,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 18:27:33,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 18:27:33,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:27:33,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 18:27:33,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:27:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:27:34,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:27:34,288 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:27:34,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-30 18:27:34,309 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:27:34,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:27:34,318 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:27:34,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:27:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:27:34,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461394788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:27:34,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:27:34,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-08-30 18:27:34,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923829752] [2023-08-30 18:27:34,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:27:34,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 18:27:34,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:27:34,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 18:27:34,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-08-30 18:27:36,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-30 18:27:36,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 251 transitions, 3615 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) [2023-08-30 18:27:36,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:27:36,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-30 18:27:36,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:27:37,222 INFO L130 PetriNetUnfolder]: 1132/2211 cut-off events. [2023-08-30 18:27:37,222 INFO L131 PetriNetUnfolder]: For 77790/77790 co-relation queries the response was YES. [2023-08-30 18:27:37,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19689 conditions, 2211 events. 1132/2211 cut-off events. For 77790/77790 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13517 event pairs, 293 based on Foata normal form. 24/2235 useless extension candidates. Maximal degree in co-relation 19576. Up to 1969 conditions per place. [2023-08-30 18:27:37,246 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 216 selfloop transitions, 59 changer transitions 1/276 dead transitions. [2023-08-30 18:27:37,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 276 transitions, 4448 flow [2023-08-30 18:27:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:27:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:27:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1746 transitions. [2023-08-30 18:27:37,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3592592592592593 [2023-08-30 18:27:37,248 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1746 transitions. [2023-08-30 18:27:37,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1746 transitions. [2023-08-30 18:27:37,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:27:37,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1746 transitions. [2023-08-30 18:27:37,249 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) [2023-08-30 18:27:37,251 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) [2023-08-30 18:27:37,252 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) [2023-08-30 18:27:37,252 INFO L175 Difference]: Start difference. First operand has 242 places, 251 transitions, 3615 flow. Second operand 15 states and 1746 transitions. [2023-08-30 18:27:37,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 276 transitions, 4448 flow [2023-08-30 18:27:37,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 276 transitions, 4196 flow, removed 72 selfloop flow, removed 10 redundant places. [2023-08-30 18:27:37,419 INFO L231 Difference]: Finished difference. Result has 247 places, 252 transitions, 3541 flow [2023-08-30 18:27:37,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3541, PETRI_PLACES=247, PETRI_TRANSITIONS=252} [2023-08-30 18:27:37,420 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 226 predicate places. [2023-08-30 18:27:37,420 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 252 transitions, 3541 flow [2023-08-30 18:27:37,421 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) [2023-08-30 18:27:37,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:27:37,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:27:37,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 18:27:37,621 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 [2023-08-30 18:27:37,621 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:27:37,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:27:37,622 INFO L85 PathProgramCache]: Analyzing trace with hash -432307696, now seen corresponding path program 16 times [2023-08-30 18:27:37,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:27:37,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488305680] [2023-08-30 18:27:37,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:27:37,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:27:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:27:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:27:38,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:27:38,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488305680] [2023-08-30 18:27:38,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488305680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:27:38,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877975314] [2023-08-30 18:27:38,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:27:38,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:27:38,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:27:38,131 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:27:38,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 18:27:38,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:27:38,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:27:38,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 18:27:38,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:27:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:27:38,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:27:38,682 INFO L321 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-08-30 18:27:38,683 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 [2023-08-30 18:27:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:27:40,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877975314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:27:40,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:27:40,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-08-30 18:27:40,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798134226] [2023-08-30 18:27:40,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:27:40,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:27:40,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:27:40,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:27:40,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:27:41,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-30 18:27:41,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 252 transitions, 3541 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) [2023-08-30 18:27:41,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:27:41,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-30 18:27:41,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:27:42,528 INFO L130 PetriNetUnfolder]: 1122/2181 cut-off events. [2023-08-30 18:27:42,529 INFO L131 PetriNetUnfolder]: For 72442/72442 co-relation queries the response was YES. [2023-08-30 18:27:42,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19416 conditions, 2181 events. 1122/2181 cut-off events. For 72442/72442 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13222 event pairs, 252 based on Foata normal form. 16/2197 useless extension candidates. Maximal degree in co-relation 19304. Up to 1666 conditions per place. [2023-08-30 18:27:42,550 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 179 selfloop transitions, 91 changer transitions 11/281 dead transitions. [2023-08-30 18:27:42,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 281 transitions, 4360 flow [2023-08-30 18:27:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 18:27:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 18:27:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2126 transitions. [2023-08-30 18:27:42,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36454046639231824 [2023-08-30 18:27:42,552 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2126 transitions. [2023-08-30 18:27:42,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2126 transitions. [2023-08-30 18:27:42,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:27:42,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2126 transitions. [2023-08-30 18:27:42,555 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) [2023-08-30 18:27:42,559 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) [2023-08-30 18:27:42,560 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) [2023-08-30 18:27:42,560 INFO L175 Difference]: Start difference. First operand has 247 places, 252 transitions, 3541 flow. Second operand 18 states and 2126 transitions. [2023-08-30 18:27:42,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 281 transitions, 4360 flow [2023-08-30 18:27:42,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 281 transitions, 4226 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-08-30 18:27:42,731 INFO L231 Difference]: Finished difference. Result has 252 places, 249 transitions, 3567 flow [2023-08-30 18:27:42,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3567, PETRI_PLACES=252, PETRI_TRANSITIONS=249} [2023-08-30 18:27:42,731 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 231 predicate places. [2023-08-30 18:27:42,732 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 249 transitions, 3567 flow [2023-08-30 18:27:42,732 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) [2023-08-30 18:27:42,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:27:42,732 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:27:42,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 18:27:42,932 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 [2023-08-30 18:27:42,933 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:27:42,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:27:42,933 INFO L85 PathProgramCache]: Analyzing trace with hash 559278698, now seen corresponding path program 17 times [2023-08-30 18:27:42,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:27:42,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770471740] [2023-08-30 18:27:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:27:42,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:27:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:27:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:27:43,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:27:43,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770471740] [2023-08-30 18:27:43,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770471740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:27:43,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940074308] [2023-08-30 18:27:43,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:27:43,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:27:43,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:27:43,629 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:27:43,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 18:27:43,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 18:27:43,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:27:43,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 18:27:43,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:27:43,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:27:44,002 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 [2023-08-30 18:27:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:27:44,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:27:44,227 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:27:44,227 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 [2023-08-30 18:27:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:27:44,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:27:44,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:27:44,751 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 [2023-08-30 18:27:44,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:27:44,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 86 [2023-08-30 18:27:44,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:27:44,775 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 [2023-08-30 18:27:44,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:27:44,811 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 [2023-08-30 18:27:44,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:27:44,837 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 [2023-08-30 18:27:44,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:27:44,940 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 [2023-08-30 18:28:58,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:28:58,832 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 [2023-08-30 18:29:39,229 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 18:29:39,236 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 [2023-08-30 18:29:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:29:53,339 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:29:53,356 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 [2023-08-30 18:29:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:29:58,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940074308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:29:58,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:29:58,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 32 [2023-08-30 18:29:58,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130331994] [2023-08-30 18:29:58,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:29:58,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 18:29:58,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:29:58,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 18:29:58,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=938, Unknown=4, NotChecked=0, Total=1056 [2023-08-30 18:30:01,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 324 [2023-08-30 18:30:01,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 249 transitions, 3567 flow. Second operand has 33 states, 33 states have (on average 100.66666666666667) internal successors, (3322), 33 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:01,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:01,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 324 [2023-08-30 18:30:01,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:03,276 INFO L130 PetriNetUnfolder]: 1281/2448 cut-off events. [2023-08-30 18:30:03,276 INFO L131 PetriNetUnfolder]: For 89327/89327 co-relation queries the response was YES. [2023-08-30 18:30:03,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22154 conditions, 2448 events. 1281/2448 cut-off events. For 89327/89327 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15039 event pairs, 234 based on Foata normal form. 28/2476 useless extension candidates. Maximal degree in co-relation 22041. Up to 1741 conditions per place. [2023-08-30 18:30:03,302 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 263 selfloop transitions, 76 changer transitions 1/340 dead transitions. [2023-08-30 18:30:03,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 340 transitions, 5396 flow [2023-08-30 18:30:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 18:30:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 18:30:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2109 transitions. [2023-08-30 18:30:03,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32546296296296295 [2023-08-30 18:30:03,305 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2109 transitions. [2023-08-30 18:30:03,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2109 transitions. [2023-08-30 18:30:03,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:03,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2109 transitions. [2023-08-30 18:30:03,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 105.45) internal successors, (2109), 20 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:03,311 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) [2023-08-30 18:30:03,312 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) [2023-08-30 18:30:03,312 INFO L175 Difference]: Start difference. First operand has 252 places, 249 transitions, 3567 flow. Second operand 20 states and 2109 transitions. [2023-08-30 18:30:03,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 340 transitions, 5396 flow [2023-08-30 18:30:03,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 340 transitions, 5178 flow, removed 12 selfloop flow, removed 17 redundant places. [2023-08-30 18:30:03,474 INFO L231 Difference]: Finished difference. Result has 258 places, 269 transitions, 3929 flow [2023-08-30 18:30:03,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3929, PETRI_PLACES=258, PETRI_TRANSITIONS=269} [2023-08-30 18:30:03,474 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2023-08-30 18:30:03,474 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 269 transitions, 3929 flow [2023-08-30 18:30:03,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 100.66666666666667) internal successors, (3322), 33 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:03,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:03,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:30:03,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:03,675 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 [2023-08-30 18:30:03,676 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:30:03,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:03,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1611664731, now seen corresponding path program 8 times [2023-08-30 18:30:03,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:03,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439862392] [2023-08-30 18:30:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:03,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:04,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:04,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439862392] [2023-08-30 18:30:04,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439862392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:04,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236113714] [2023-08-30 18:30:04,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:30:04,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:04,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:04,081 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:30:04,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 18:30:04,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:30:04,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:30:04,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 18:30:04,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:04,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:30:04,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:30:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:04,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:04,490 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 [2023-08-30 18:30:04,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:30:04,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 178 [2023-08-30 18:30:04,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:30:04,539 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 [2023-08-30 18:30:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:05,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236113714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:05,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:05,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2023-08-30 18:30:05,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074390811] [2023-08-30 18:30:05,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:05,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 18:30:05,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:05,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 18:30:05,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=481, Unknown=1, NotChecked=44, Total=600 [2023-08-30 18:30:05,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-08-30 18:30:05,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 269 transitions, 3929 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) [2023-08-30 18:30:05,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:05,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-08-30 18:30:05,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:12,161 WARN L222 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 43 DAG size of output: 30 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 18:30:12,987 INFO L130 PetriNetUnfolder]: 1312/2506 cut-off events. [2023-08-30 18:30:12,987 INFO L131 PetriNetUnfolder]: For 104228/104228 co-relation queries the response was YES. [2023-08-30 18:30:13,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23867 conditions, 2506 events. 1312/2506 cut-off events. For 104228/104228 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15470 event pairs, 302 based on Foata normal form. 4/2510 useless extension candidates. Maximal degree in co-relation 23748. Up to 2125 conditions per place. [2023-08-30 18:30:13,014 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 229 selfloop transitions, 84 changer transitions 13/326 dead transitions. [2023-08-30 18:30:13,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 326 transitions, 5279 flow [2023-08-30 18:30:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:30:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:30:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1601 transitions. [2023-08-30 18:30:13,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35295414462081126 [2023-08-30 18:30:13,016 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1601 transitions. [2023-08-30 18:30:13,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1601 transitions. [2023-08-30 18:30:13,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:13,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1601 transitions. [2023-08-30 18:30:13,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.35714285714286) internal successors, (1601), 14 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:13,020 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) [2023-08-30 18:30:13,020 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) [2023-08-30 18:30:13,020 INFO L175 Difference]: Start difference. First operand has 258 places, 269 transitions, 3929 flow. Second operand 14 states and 1601 transitions. [2023-08-30 18:30:13,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 326 transitions, 5279 flow [2023-08-30 18:30:13,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 326 transitions, 5021 flow, removed 88 selfloop flow, removed 10 redundant places. [2023-08-30 18:30:13,218 INFO L231 Difference]: Finished difference. Result has 263 places, 287 transitions, 4216 flow [2023-08-30 18:30:13,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4216, PETRI_PLACES=263, PETRI_TRANSITIONS=287} [2023-08-30 18:30:13,219 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 242 predicate places. [2023-08-30 18:30:13,219 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 287 transitions, 4216 flow [2023-08-30 18:30:13,220 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) [2023-08-30 18:30:13,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:13,220 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:30:13,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:13,420 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 [2023-08-30 18:30:13,421 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:30:13,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:13,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1001465655, now seen corresponding path program 9 times [2023-08-30 18:30:13,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:13,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23187324] [2023-08-30 18:30:13,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:13,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:13,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:13,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23187324] [2023-08-30 18:30:13,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23187324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:13,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518048218] [2023-08-30 18:30:13,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:30:13,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:13,877 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:30:13,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 18:30:14,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:30:14,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:30:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 18:30:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:14,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:30:14,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:30:14,246 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 18:30:14,246 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 [2023-08-30 18:30:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:14,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:14,446 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-30 18:30:14,447 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 [2023-08-30 18:30:14,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:30:14,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 55 [2023-08-30 18:30:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:14,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518048218] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:14,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:14,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 18:30:14,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891564856] [2023-08-30 18:30:14,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:14,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 18:30:14,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:14,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 18:30:14,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=566, Unknown=7, NotChecked=0, Total=650 [2023-08-30 18:30:15,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 324 [2023-08-30 18:30:15,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 287 transitions, 4216 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) [2023-08-30 18:30:15,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:15,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 324 [2023-08-30 18:30:15,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:16,172 INFO L130 PetriNetUnfolder]: 1304/2493 cut-off events. [2023-08-30 18:30:16,172 INFO L131 PetriNetUnfolder]: For 106661/106661 co-relation queries the response was YES. [2023-08-30 18:30:16,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24307 conditions, 2493 events. 1304/2493 cut-off events. For 106661/106661 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15399 event pairs, 328 based on Foata normal form. 4/2497 useless extension candidates. Maximal degree in co-relation 24188. Up to 2125 conditions per place. [2023-08-30 18:30:16,199 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 234 selfloop transitions, 75 changer transitions 13/322 dead transitions. [2023-08-30 18:30:16,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 322 transitions, 5242 flow [2023-08-30 18:30:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:30:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:30:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1221 transitions. [2023-08-30 18:30:16,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3425925925925926 [2023-08-30 18:30:16,201 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1221 transitions. [2023-08-30 18:30:16,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1221 transitions. [2023-08-30 18:30:16,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:16,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1221 transitions. [2023-08-30 18:30:16,202 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) [2023-08-30 18:30:16,204 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) [2023-08-30 18:30:16,204 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) [2023-08-30 18:30:16,204 INFO L175 Difference]: Start difference. First operand has 263 places, 287 transitions, 4216 flow. Second operand 11 states and 1221 transitions. [2023-08-30 18:30:16,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 322 transitions, 5242 flow [2023-08-30 18:30:16,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 322 transitions, 5007 flow, removed 26 selfloop flow, removed 11 redundant places. [2023-08-30 18:30:16,384 INFO L231 Difference]: Finished difference. Result has 261 places, 285 transitions, 4117 flow [2023-08-30 18:30:16,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3984, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4117, PETRI_PLACES=261, PETRI_TRANSITIONS=285} [2023-08-30 18:30:16,385 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-08-30 18:30:16,385 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 285 transitions, 4117 flow [2023-08-30 18:30:16,385 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) [2023-08-30 18:30:16,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:16,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:30:16,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:16,586 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 [2023-08-30 18:30:16,586 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:30:16,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:16,586 INFO L85 PathProgramCache]: Analyzing trace with hash 695500837, now seen corresponding path program 10 times [2023-08-30 18:30:16,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:16,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057895548] [2023-08-30 18:30:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:16,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:17,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:17,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057895548] [2023-08-30 18:30:17,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057895548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:17,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220989610] [2023-08-30 18:30:17,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:30:17,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:17,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:17,008 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:30:17,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 18:30:17,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:30:17,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:30:17,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 18:30:17,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:17,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:30:17,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:30:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:17,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:17,501 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 [2023-08-30 18:30:17,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:30:17,539 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 [2023-08-30 18:30:17,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:30:17,561 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 [2023-08-30 18:30:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:18,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220989610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:18,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:18,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-08-30 18:30:18,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371282609] [2023-08-30 18:30:18,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:18,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 18:30:18,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:18,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 18:30:18,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=480, Unknown=1, NotChecked=44, Total=600 [2023-08-30 18:30:18,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-08-30 18:30:18,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 285 transitions, 4117 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) [2023-08-30 18:30:18,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:18,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-08-30 18:30:18,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:25,269 INFO L130 PetriNetUnfolder]: 1292/2461 cut-off events. [2023-08-30 18:30:25,270 INFO L131 PetriNetUnfolder]: For 105478/105478 co-relation queries the response was YES. [2023-08-30 18:30:25,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23929 conditions, 2461 events. 1292/2461 cut-off events. For 105478/105478 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15085 event pairs, 317 based on Foata normal form. 4/2465 useless extension candidates. Maximal degree in co-relation 23822. Up to 2035 conditions per place. [2023-08-30 18:30:25,297 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 213 selfloop transitions, 103 changer transitions 3/319 dead transitions. [2023-08-30 18:30:25,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 319 transitions, 5256 flow [2023-08-30 18:30:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 18:30:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 18:30:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1816 transitions. [2023-08-30 18:30:25,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35030864197530864 [2023-08-30 18:30:25,299 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1816 transitions. [2023-08-30 18:30:25,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1816 transitions. [2023-08-30 18:30:25,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:25,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1816 transitions. [2023-08-30 18:30:25,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 113.5) internal successors, (1816), 16 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:25,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:25,305 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:25,305 INFO L175 Difference]: Start difference. First operand has 261 places, 285 transitions, 4117 flow. Second operand 16 states and 1816 transitions. [2023-08-30 18:30:25,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 319 transitions, 5256 flow [2023-08-30 18:30:25,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 319 transitions, 5106 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-30 18:30:25,463 INFO L231 Difference]: Finished difference. Result has 267 places, 287 transitions, 4244 flow [2023-08-30 18:30:25,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3969, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4244, PETRI_PLACES=267, PETRI_TRANSITIONS=287} [2023-08-30 18:30:25,464 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2023-08-30 18:30:25,464 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 287 transitions, 4244 flow [2023-08-30 18:30:25,465 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) [2023-08-30 18:30:25,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:25,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:30:25,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:25,665 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 [2023-08-30 18:30:25,665 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:30:25,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:25,666 INFO L85 PathProgramCache]: Analyzing trace with hash 95734045, now seen corresponding path program 11 times [2023-08-30 18:30:25,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:25,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294858091] [2023-08-30 18:30:25,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:25,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:26,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:26,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294858091] [2023-08-30 18:30:26,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294858091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:26,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904844167] [2023-08-30 18:30:26,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:30:26,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:26,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:26,077 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:30:26,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 18:30:26,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:30:26,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:30:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 18:30:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:26,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:30:26,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:30:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:30:26,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:26,535 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 [2023-08-30 18:30:26,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:30:26,568 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 [2023-08-30 18:30:26,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:30:26,588 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 [2023-08-30 18:30:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:27,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904844167] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:27,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:27,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 25 [2023-08-30 18:30:27,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769143231] [2023-08-30 18:30:27,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 18:30:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 18:30:27,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=520, Unknown=1, NotChecked=46, Total=650 [2023-08-30 18:30:27,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 324 [2023-08-30 18:30:27,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 287 transitions, 4244 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) [2023-08-30 18:30:27,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:27,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 324 [2023-08-30 18:30:27,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:30,183 INFO L130 PetriNetUnfolder]: 1272/2421 cut-off events. [2023-08-30 18:30:30,183 INFO L131 PetriNetUnfolder]: For 105066/105066 co-relation queries the response was YES. [2023-08-30 18:30:30,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23732 conditions, 2421 events. 1272/2421 cut-off events. For 105066/105066 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14741 event pairs, 325 based on Foata normal form. 8/2429 useless extension candidates. Maximal degree in co-relation 23613. Up to 2081 conditions per place. [2023-08-30 18:30:30,207 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 217 selfloop transitions, 85 changer transitions 15/317 dead transitions. [2023-08-30 18:30:30,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 317 transitions, 5170 flow [2023-08-30 18:30:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 18:30:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 18:30:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1752 transitions. [2023-08-30 18:30:30,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31808278867102396 [2023-08-30 18:30:30,216 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1752 transitions. [2023-08-30 18:30:30,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1752 transitions. [2023-08-30 18:30:30,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:30,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1752 transitions. [2023-08-30 18:30:30,223 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) [2023-08-30 18:30:30,226 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) [2023-08-30 18:30:30,227 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) [2023-08-30 18:30:30,227 INFO L175 Difference]: Start difference. First operand has 267 places, 287 transitions, 4244 flow. Second operand 17 states and 1752 transitions. [2023-08-30 18:30:30,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 317 transitions, 5170 flow [2023-08-30 18:30:30,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 317 transitions, 4944 flow, removed 17 selfloop flow, removed 13 redundant places. [2023-08-30 18:30:30,436 INFO L231 Difference]: Finished difference. Result has 270 places, 283 transitions, 4140 flow [2023-08-30 18:30:30,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4140, PETRI_PLACES=270, PETRI_TRANSITIONS=283} [2023-08-30 18:30:30,437 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 249 predicate places. [2023-08-30 18:30:30,437 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 283 transitions, 4140 flow [2023-08-30 18:30:30,438 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) [2023-08-30 18:30:30,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:30,438 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:30:30,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:30,639 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 [2023-08-30 18:30:30,639 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:30:30,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:30,640 INFO L85 PathProgramCache]: Analyzing trace with hash -185131032, now seen corresponding path program 18 times [2023-08-30 18:30:30,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:30,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380852476] [2023-08-30 18:30:30,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:30,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:31,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380852476] [2023-08-30 18:30:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380852476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548547825] [2023-08-30 18:30:31,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:30:31,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:31,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:31,258 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:30:31,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 18:30:31,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:30:31,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:30:31,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 18:30:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:30:31,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:30:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:31,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:32,006 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 [2023-08-30 18:30:32,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:30:32,101 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 [2023-08-30 18:30:32,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:30:32,134 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 155 treesize of output 157 [2023-08-30 18:30:32,146 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 [2023-08-30 18:30:32,158 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 [2023-08-30 18:30:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:37,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548547825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:37,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:37,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 26 [2023-08-30 18:30:37,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498311302] [2023-08-30 18:30:37,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:37,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 18:30:37,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:37,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 18:30:37,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2023-08-30 18:30:37,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-08-30 18:30:37,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 283 transitions, 4140 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) [2023-08-30 18:30:37,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:37,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-08-30 18:30:37,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:38,555 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 [2023-08-30 18:30:44,144 INFO L130 PetriNetUnfolder]: 1408/2711 cut-off events. [2023-08-30 18:30:44,144 INFO L131 PetriNetUnfolder]: For 115906/115906 co-relation queries the response was YES. [2023-08-30 18:30:44,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25947 conditions, 2711 events. 1408/2711 cut-off events. For 115906/115906 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17032 event pairs, 277 based on Foata normal form. 46/2757 useless extension candidates. Maximal degree in co-relation 25827. Up to 2159 conditions per place. [2023-08-30 18:30:44,173 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 268 selfloop transitions, 117 changer transitions 4/389 dead transitions. [2023-08-30 18:30:44,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 389 transitions, 6367 flow [2023-08-30 18:30:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 18:30:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 18:30:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2307 transitions. [2023-08-30 18:30:44,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27386039886039887 [2023-08-30 18:30:44,175 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2307 transitions. [2023-08-30 18:30:44,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2307 transitions. [2023-08-30 18:30:44,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:44,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2307 transitions. [2023-08-30 18:30:44,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 88.73076923076923) internal successors, (2307), 26 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:44,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:44,183 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:30:44,183 INFO L175 Difference]: Start difference. First operand has 270 places, 283 transitions, 4140 flow. Second operand 26 states and 2307 transitions. [2023-08-30 18:30:44,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 389 transitions, 6367 flow [2023-08-30 18:30:44,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 389 transitions, 6004 flow, removed 17 selfloop flow, removed 19 redundant places. [2023-08-30 18:30:44,402 INFO L231 Difference]: Finished difference. Result has 283 places, 324 transitions, 4967 flow [2023-08-30 18:30:44,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3910, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4967, PETRI_PLACES=283, PETRI_TRANSITIONS=324} [2023-08-30 18:30:44,403 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 262 predicate places. [2023-08-30 18:30:44,403 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 324 transitions, 4967 flow [2023-08-30 18:30:44,403 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) [2023-08-30 18:30:44,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:44,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:30:44,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:44,604 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 [2023-08-30 18:30:44,604 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:30:44,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:44,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1268623832, now seen corresponding path program 19 times [2023-08-30 18:30:44,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:44,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517647394] [2023-08-30 18:30:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:44,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:45,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:45,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517647394] [2023-08-30 18:30:45,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517647394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:45,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747999065] [2023-08-30 18:30:45,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:30:45,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:45,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:45,161 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:30:45,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 18:30:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:45,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 18:30:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:45,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:30:45,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:30:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:45,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:46,004 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 [2023-08-30 18:30:46,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:30:46,017 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 [2023-08-30 18:30:46,019 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 [2023-08-30 18:30:46,072 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-30 18:30:46,072 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 [2023-08-30 18:30:46,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:30:46,090 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 [2023-08-30 18:30:46,346 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:30:46,346 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 [2023-08-30 18:30:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:46,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747999065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:46,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:46,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2023-08-30 18:30:46,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621796680] [2023-08-30 18:30:46,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:46,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 18:30:46,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:46,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 18:30:46,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1075, Unknown=1, NotChecked=66, Total=1260 [2023-08-30 18:30:46,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-08-30 18:30:46,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 324 transitions, 4967 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) [2023-08-30 18:30:46,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:46,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-08-30 18:30:46,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:49,376 INFO L130 PetriNetUnfolder]: 1399/2688 cut-off events. [2023-08-30 18:30:49,376 INFO L131 PetriNetUnfolder]: For 136351/136351 co-relation queries the response was YES. [2023-08-30 18:30:49,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27214 conditions, 2688 events. 1399/2688 cut-off events. For 136351/136351 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16802 event pairs, 321 based on Foata normal form. 2/2690 useless extension candidates. Maximal degree in co-relation 27089. Up to 2580 conditions per place. [2023-08-30 18:30:49,404 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 280 selfloop transitions, 51 changer transitions 3/334 dead transitions. [2023-08-30 18:30:49,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 334 transitions, 5711 flow [2023-08-30 18:30:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:30:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:30:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1313 transitions. [2023-08-30 18:30:49,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27016460905349793 [2023-08-30 18:30:49,406 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1313 transitions. [2023-08-30 18:30:49,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1313 transitions. [2023-08-30 18:30:49,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:49,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1313 transitions. [2023-08-30 18:30:49,407 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) [2023-08-30 18:30:49,409 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) [2023-08-30 18:30:49,409 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) [2023-08-30 18:30:49,409 INFO L175 Difference]: Start difference. First operand has 283 places, 324 transitions, 4967 flow. Second operand 15 states and 1313 transitions. [2023-08-30 18:30:49,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 334 transitions, 5711 flow [2023-08-30 18:30:49,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 334 transitions, 5627 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-08-30 18:30:49,666 INFO L231 Difference]: Finished difference. Result has 286 places, 322 transitions, 4953 flow [2023-08-30 18:30:49,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4861, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4953, PETRI_PLACES=286, PETRI_TRANSITIONS=322} [2023-08-30 18:30:49,666 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 265 predicate places. [2023-08-30 18:30:49,666 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 322 transitions, 4953 flow [2023-08-30 18:30:49,667 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) [2023-08-30 18:30:49,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:49,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:30:49,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:49,868 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 [2023-08-30 18:30:49,869 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:30:49,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash 654676370, now seen corresponding path program 20 times [2023-08-30 18:30:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:49,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100647848] [2023-08-30 18:30:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100647848] [2023-08-30 18:30:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100647848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709085088] [2023-08-30 18:30:49,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:30:49,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:49,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:49,975 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:30:49,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 18:30:50,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:30:50,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:30:50,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 18:30:50,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:50,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:50,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709085088] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:50,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:50,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-08-30 18:30:50,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532844838] [2023-08-30 18:30:50,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:50,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 18:30:50,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:50,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 18:30:50,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-30 18:30:50,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-08-30 18:30:50,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 322 transitions, 4953 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) [2023-08-30 18:30:50,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:50,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-08-30 18:30:50,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:51,171 INFO L130 PetriNetUnfolder]: 1761/3369 cut-off events. [2023-08-30 18:30:51,171 INFO L131 PetriNetUnfolder]: For 161315/161315 co-relation queries the response was YES. [2023-08-30 18:30:51,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33678 conditions, 3369 events. 1761/3369 cut-off events. For 161315/161315 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 22025 event pairs, 289 based on Foata normal form. 5/3374 useless extension candidates. Maximal degree in co-relation 33553. Up to 2168 conditions per place. [2023-08-30 18:30:51,202 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 275 selfloop transitions, 126 changer transitions 2/403 dead transitions. [2023-08-30 18:30:51,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 403 transitions, 7008 flow [2023-08-30 18:30:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:30:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:30:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1543 transitions. [2023-08-30 18:30:51,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762345679012346 [2023-08-30 18:30:51,204 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1543 transitions. [2023-08-30 18:30:51,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1543 transitions. [2023-08-30 18:30:51,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:51,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1543 transitions. [2023-08-30 18:30:51,205 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) [2023-08-30 18:30:51,206 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) [2023-08-30 18:30:51,206 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) [2023-08-30 18:30:51,206 INFO L175 Difference]: Start difference. First operand has 286 places, 322 transitions, 4953 flow. Second operand 10 states and 1543 transitions. [2023-08-30 18:30:51,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 403 transitions, 7008 flow [2023-08-30 18:30:51,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 403 transitions, 6876 flow, removed 1 selfloop flow, removed 17 redundant places. [2023-08-30 18:30:51,504 INFO L231 Difference]: Finished difference. Result has 280 places, 350 transitions, 5726 flow [2023-08-30 18:30:51,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4821, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5726, PETRI_PLACES=280, PETRI_TRANSITIONS=350} [2023-08-30 18:30:51,504 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 259 predicate places. [2023-08-30 18:30:51,504 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 350 transitions, 5726 flow [2023-08-30 18:30:51,505 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) [2023-08-30 18:30:51,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:51,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:30:51,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:51,705 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 [2023-08-30 18:30:51,705 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:30:51,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:51,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1667538898, now seen corresponding path program 21 times [2023-08-30 18:30:51,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:51,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79409156] [2023-08-30 18:30:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:51,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:51,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:51,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79409156] [2023-08-30 18:30:51,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79409156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:51,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597980909] [2023-08-30 18:30:51,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:30:51,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:51,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:51,809 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:30:51,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 18:30:52,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 18:30:52,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:30:52,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 18:30:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:52,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:30:52,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597980909] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:52,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:52,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 25 [2023-08-30 18:30:52,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916098273] [2023-08-30 18:30:52,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:52,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 18:30:52,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:52,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 18:30:52,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2023-08-30 18:30:54,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 324 [2023-08-30 18:30:54,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 350 transitions, 5726 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) [2023-08-30 18:30:54,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:54,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 324 [2023-08-30 18:30:54,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:55,928 INFO L130 PetriNetUnfolder]: 1991/3800 cut-off events. [2023-08-30 18:30:55,928 INFO L131 PetriNetUnfolder]: For 198564/198564 co-relation queries the response was YES. [2023-08-30 18:30:55,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40002 conditions, 3800 events. 1991/3800 cut-off events. For 198564/198564 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25627 event pairs, 128 based on Foata normal form. 15/3815 useless extension candidates. Maximal degree in co-relation 39878. Up to 1347 conditions per place. [2023-08-30 18:30:55,968 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 284 selfloop transitions, 212 changer transitions 7/503 dead transitions. [2023-08-30 18:30:55,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 503 transitions, 9307 flow [2023-08-30 18:30:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:30:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:30:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2881 transitions. [2023-08-30 18:30:55,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041806958473625 [2023-08-30 18:30:55,970 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2881 transitions. [2023-08-30 18:30:55,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2881 transitions. [2023-08-30 18:30:55,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:55,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2881 transitions. [2023-08-30 18:30:55,972 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) [2023-08-30 18:30:55,975 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) [2023-08-30 18:30:55,975 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) [2023-08-30 18:30:55,975 INFO L175 Difference]: Start difference. First operand has 280 places, 350 transitions, 5726 flow. Second operand 22 states and 2881 transitions. [2023-08-30 18:30:55,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 503 transitions, 9307 flow [2023-08-30 18:30:56,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 503 transitions, 8875 flow, removed 197 selfloop flow, removed 2 redundant places. [2023-08-30 18:30:56,323 INFO L231 Difference]: Finished difference. Result has 307 places, 388 transitions, 6884 flow [2023-08-30 18:30:56,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=5462, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6884, PETRI_PLACES=307, PETRI_TRANSITIONS=388} [2023-08-30 18:30:56,323 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 286 predicate places. [2023-08-30 18:30:56,324 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 388 transitions, 6884 flow [2023-08-30 18:30:56,324 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) [2023-08-30 18:30:56,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:56,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:30:56,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:56,530 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 [2023-08-30 18:30:56,530 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:30:56,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:56,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1628592980, now seen corresponding path program 22 times [2023-08-30 18:30:56,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:56,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41843746] [2023-08-30 18:30:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:56,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:56,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:56,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41843746] [2023-08-30 18:30:56,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41843746] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:56,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22094208] [2023-08-30 18:30:56,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:30:56,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:56,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:56,649 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:30:56,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 18:30:56,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:30:56,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:30:56,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 18:30:56,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:56,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:30:57,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22094208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:57,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:57,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 14 [2023-08-30 18:30:57,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810360647] [2023-08-30 18:30:57,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:57,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 18:30:57,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:57,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 18:30:57,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-30 18:30:57,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2023-08-30 18:30:57,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 388 transitions, 6884 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) [2023-08-30 18:30:57,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:30:57,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2023-08-30 18:30:57,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:30:58,784 INFO L130 PetriNetUnfolder]: 2484/4763 cut-off events. [2023-08-30 18:30:58,784 INFO L131 PetriNetUnfolder]: For 280259/280259 co-relation queries the response was YES. [2023-08-30 18:30:58,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53097 conditions, 4763 events. 2484/4763 cut-off events. For 280259/280259 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33882 event pairs, 234 based on Foata normal form. 87/4850 useless extension candidates. Maximal degree in co-relation 52962. Up to 1727 conditions per place. [2023-08-30 18:30:58,850 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 333 selfloop transitions, 252 changer transitions 24/609 dead transitions. [2023-08-30 18:30:58,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 609 transitions, 12177 flow [2023-08-30 18:30:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 18:30:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 18:30:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3916 transitions. [2023-08-30 18:30:58,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476451760402378 [2023-08-30 18:30:58,853 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3916 transitions. [2023-08-30 18:30:58,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3916 transitions. [2023-08-30 18:30:58,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:30:58,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3916 transitions. [2023-08-30 18:30:58,855 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) [2023-08-30 18:30:58,859 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) [2023-08-30 18:30:58,859 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) [2023-08-30 18:30:58,859 INFO L175 Difference]: Start difference. First operand has 307 places, 388 transitions, 6884 flow. Second operand 27 states and 3916 transitions. [2023-08-30 18:30:58,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 609 transitions, 12177 flow [2023-08-30 18:30:59,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 609 transitions, 11659 flow, removed 204 selfloop flow, removed 11 redundant places. [2023-08-30 18:30:59,351 INFO L231 Difference]: Finished difference. Result has 334 places, 443 transitions, 8652 flow [2023-08-30 18:30:59,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6374, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8652, PETRI_PLACES=334, PETRI_TRANSITIONS=443} [2023-08-30 18:30:59,351 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 313 predicate places. [2023-08-30 18:30:59,351 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 443 transitions, 8652 flow [2023-08-30 18:30:59,352 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) [2023-08-30 18:30:59,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:30:59,352 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:30:59,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 18:30:59,552 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 [2023-08-30 18:30:59,552 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:30:59,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:30:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1095367968, now seen corresponding path program 23 times [2023-08-30 18:30:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:30:59,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333854496] [2023-08-30 18:30:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:30:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:30:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:30:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:59,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:30:59,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333854496] [2023-08-30 18:30:59,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333854496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:30:59,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281815245] [2023-08-30 18:30:59,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:30:59,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:30:59,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:30:59,661 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:30:59,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 18:30:59,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 18:30:59,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:30:59,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 18:30:59,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:30:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:30:59,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:30:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:30:59,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281815245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:30:59,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:30:59,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-08-30 18:30:59,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325504711] [2023-08-30 18:30:59,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:30:59,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 18:30:59,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:30:59,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 18:30:59,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-30 18:31:00,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 324 [2023-08-30 18:31:00,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 443 transitions, 8652 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) [2023-08-30 18:31:00,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:31:00,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 324 [2023-08-30 18:31:00,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:31:01,462 INFO L130 PetriNetUnfolder]: 2843/5442 cut-off events. [2023-08-30 18:31:01,463 INFO L131 PetriNetUnfolder]: For 343768/343768 co-relation queries the response was YES. [2023-08-30 18:31:01,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63105 conditions, 5442 events. 2843/5442 cut-off events. For 343768/343768 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 39615 event pairs, 622 based on Foata normal form. 6/5448 useless extension candidates. Maximal degree in co-relation 62961. Up to 4007 conditions per place. [2023-08-30 18:31:01,531 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 415 selfloop transitions, 129 changer transitions 7/551 dead transitions. [2023-08-30 18:31:01,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 551 transitions, 12061 flow [2023-08-30 18:31:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:31:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:31:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1533 transitions. [2023-08-30 18:31:01,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47314814814814815 [2023-08-30 18:31:01,533 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1533 transitions. [2023-08-30 18:31:01,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1533 transitions. [2023-08-30 18:31:01,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:31:01,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1533 transitions. [2023-08-30 18:31:01,534 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) [2023-08-30 18:31:01,535 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) [2023-08-30 18:31:01,535 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) [2023-08-30 18:31:01,535 INFO L175 Difference]: Start difference. First operand has 334 places, 443 transitions, 8652 flow. Second operand 10 states and 1533 transitions. [2023-08-30 18:31:01,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 551 transitions, 12061 flow [2023-08-30 18:31:02,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 551 transitions, 10965 flow, removed 517 selfloop flow, removed 7 redundant places. [2023-08-30 18:31:02,364 INFO L231 Difference]: Finished difference. Result has 337 places, 485 transitions, 9364 flow [2023-08-30 18:31:02,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7972, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9364, PETRI_PLACES=337, PETRI_TRANSITIONS=485} [2023-08-30 18:31:02,364 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 316 predicate places. [2023-08-30 18:31:02,364 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 485 transitions, 9364 flow [2023-08-30 18:31:02,365 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) [2023-08-30 18:31:02,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:31:02,365 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:31:02,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 18:31:02,565 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 [2023-08-30 18:31:02,565 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:31:02,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:31:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1359474198, now seen corresponding path program 12 times [2023-08-30 18:31:02,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:31:02,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659656129] [2023-08-30 18:31:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:31:02,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:31:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:31:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:31:02,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:31:02,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659656129] [2023-08-30 18:31:02,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659656129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:31:02,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247843175] [2023-08-30 18:31:02,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:31:02,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:31:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:31:02,683 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:31:02,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 18:31:02,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:31:02,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:31:02,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 18:31:02,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:31:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:31:03,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:31:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:31:03,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247843175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:31:03,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:31:03,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 18:31:03,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432654209] [2023-08-30 18:31:03,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:31:03,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:31:03,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:31:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:31:03,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:31:03,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 324 [2023-08-30 18:31:03,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 485 transitions, 9364 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) [2023-08-30 18:31:03,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:31:03,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 324 [2023-08-30 18:31:03,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:31:04,644 INFO L130 PetriNetUnfolder]: 2799/5309 cut-off events. [2023-08-30 18:31:04,645 INFO L131 PetriNetUnfolder]: For 307478/307478 co-relation queries the response was YES. [2023-08-30 18:31:04,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60014 conditions, 5309 events. 2799/5309 cut-off events. For 307478/307478 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 37711 event pairs, 1351 based on Foata normal form. 83/5392 useless extension candidates. Maximal degree in co-relation 59868. Up to 4622 conditions per place. [2023-08-30 18:31:04,714 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 469 selfloop transitions, 19 changer transitions 61/549 dead transitions. [2023-08-30 18:31:04,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 549 transitions, 11682 flow [2023-08-30 18:31:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 18:31:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 18:31:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1107 transitions. [2023-08-30 18:31:04,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2023-08-30 18:31:04,715 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1107 transitions. [2023-08-30 18:31:04,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1107 transitions. [2023-08-30 18:31:04,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:31:04,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1107 transitions. [2023-08-30 18:31:04,716 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) [2023-08-30 18:31:04,717 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) [2023-08-30 18:31:04,718 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) [2023-08-30 18:31:04,718 INFO L175 Difference]: Start difference. First operand has 337 places, 485 transitions, 9364 flow. Second operand 8 states and 1107 transitions. [2023-08-30 18:31:04,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 549 transitions, 11682 flow [2023-08-30 18:31:05,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 549 transitions, 11265 flow, removed 117 selfloop flow, removed 12 redundant places. [2023-08-30 18:31:05,684 INFO L231 Difference]: Finished difference. Result has 326 places, 444 transitions, 8539 flow [2023-08-30 18:31:05,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8426, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8539, PETRI_PLACES=326, PETRI_TRANSITIONS=444} [2023-08-30 18:31:05,685 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 305 predicate places. [2023-08-30 18:31:05,685 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 444 transitions, 8539 flow [2023-08-30 18:31:05,686 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) [2023-08-30 18:31:05,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:31:05,686 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:31:05,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 18:31:05,892 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 [2023-08-30 18:31:05,892 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:31:05,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:31:05,893 INFO L85 PathProgramCache]: Analyzing trace with hash -493468489, now seen corresponding path program 13 times [2023-08-30 18:31:05,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:31:05,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400681697] [2023-08-30 18:31:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:31:05,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:31:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:31:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:31:05,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:31:05,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400681697] [2023-08-30 18:31:05,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400681697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:31:05,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157740788] [2023-08-30 18:31:05,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:31:05,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:31:05,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:31:05,983 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:31:05,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 18:31:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:31:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 18:31:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:31:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:31:06,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:31:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:31:06,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157740788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:31:06,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:31:06,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-30 18:31:06,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672138351] [2023-08-30 18:31:06,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:31:06,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 18:31:06,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:31:06,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 18:31:06,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-08-30 18:31:06,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 324 [2023-08-30 18:31:06,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 444 transitions, 8539 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) [2023-08-30 18:31:06,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:31:06,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 324 [2023-08-30 18:31:06,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:31:08,352 INFO L130 PetriNetUnfolder]: 3390/6561 cut-off events. [2023-08-30 18:31:08,352 INFO L131 PetriNetUnfolder]: For 356050/356050 co-relation queries the response was YES. [2023-08-30 18:31:08,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71535 conditions, 6561 events. 3390/6561 cut-off events. For 356050/356050 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 48730 event pairs, 811 based on Foata normal form. 163/6724 useless extension candidates. Maximal degree in co-relation 71392. Up to 4908 conditions per place. [2023-08-30 18:31:08,424 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 508 selfloop transitions, 62 changer transitions 68/638 dead transitions. [2023-08-30 18:31:08,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 638 transitions, 13433 flow [2023-08-30 18:31:08,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:31:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:31:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1376 transitions. [2023-08-30 18:31:08,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246913580246914 [2023-08-30 18:31:08,426 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1376 transitions. [2023-08-30 18:31:08,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1376 transitions. [2023-08-30 18:31:08,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:31:08,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1376 transitions. [2023-08-30 18:31:08,427 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) [2023-08-30 18:31:08,428 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) [2023-08-30 18:31:08,428 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) [2023-08-30 18:31:08,428 INFO L175 Difference]: Start difference. First operand has 326 places, 444 transitions, 8539 flow. Second operand 10 states and 1376 transitions. [2023-08-30 18:31:08,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 638 transitions, 13433 flow [2023-08-30 18:31:09,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 638 transitions, 13300 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-08-30 18:31:09,418 INFO L231 Difference]: Finished difference. Result has 321 places, 483 transitions, 9702 flow [2023-08-30 18:31:09,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8453, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9702, PETRI_PLACES=321, PETRI_TRANSITIONS=483} [2023-08-30 18:31:09,419 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 300 predicate places. [2023-08-30 18:31:09,419 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 483 transitions, 9702 flow [2023-08-30 18:31:09,419 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) [2023-08-30 18:31:09,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:31:09,420 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:31:09,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 18:31:09,625 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 [2023-08-30 18:31:09,625 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:31:09,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:31:09,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1159595898, now seen corresponding path program 24 times [2023-08-30 18:31:09,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:31:09,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900322424] [2023-08-30 18:31:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:31:09,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:31:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:31:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:31:09,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:31:09,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900322424] [2023-08-30 18:31:09,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900322424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:31:09,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155401657] [2023-08-30 18:31:09,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:31:09,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:31:09,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:31:09,749 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:31:09,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 18:31:10,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:31:10,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:31:10,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 18:31:10,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:31:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:31:10,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:31:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:31:10,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155401657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:31:10,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:31:10,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-08-30 18:31:10,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537323572] [2023-08-30 18:31:10,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:31:10,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 18:31:10,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:31:10,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 18:31:10,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-30 18:31:11,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 324 [2023-08-30 18:31:11,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 483 transitions, 9702 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) [2023-08-30 18:31:11,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:31:11,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 324 [2023-08-30 18:31:11,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:31:12,858 INFO L130 PetriNetUnfolder]: 2909/5610 cut-off events. [2023-08-30 18:31:12,858 INFO L131 PetriNetUnfolder]: For 294195/294195 co-relation queries the response was YES. [2023-08-30 18:31:12,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60760 conditions, 5610 events. 2909/5610 cut-off events. For 294195/294195 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 40313 event pairs, 662 based on Foata normal form. 86/5696 useless extension candidates. Maximal degree in co-relation 60622. Up to 4241 conditions per place. [2023-08-30 18:31:12,922 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 384 selfloop transitions, 42 changer transitions 252/678 dead transitions. [2023-08-30 18:31:12,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 678 transitions, 13642 flow [2023-08-30 18:31:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 18:31:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 18:31:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2847 transitions. [2023-08-30 18:31:12,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184303350970018 [2023-08-30 18:31:12,925 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2847 transitions. [2023-08-30 18:31:12,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2847 transitions. [2023-08-30 18:31:12,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:31:12,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2847 transitions. [2023-08-30 18:31:12,928 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) [2023-08-30 18:31:12,931 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) [2023-08-30 18:31:12,931 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) [2023-08-30 18:31:12,931 INFO L175 Difference]: Start difference. First operand has 321 places, 483 transitions, 9702 flow. Second operand 21 states and 2847 transitions. [2023-08-30 18:31:12,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 678 transitions, 13642 flow [2023-08-30 18:31:13,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 678 transitions, 13538 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-08-30 18:31:13,820 INFO L231 Difference]: Finished difference. Result has 343 places, 420 transitions, 8114 flow [2023-08-30 18:31:13,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=9480, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8114, PETRI_PLACES=343, PETRI_TRANSITIONS=420} [2023-08-30 18:31:13,821 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 322 predicate places. [2023-08-30 18:31:13,821 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 420 transitions, 8114 flow [2023-08-30 18:31:13,821 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) [2023-08-30 18:31:13,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:31:13,822 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:31:13,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 18:31:14,027 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 [2023-08-30 18:31:14,028 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:31:14,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:31:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1198980961, now seen corresponding path program 14 times [2023-08-30 18:31:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:31:14,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162571773] [2023-08-30 18:31:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:31:14,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:31:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:31:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:31:14,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:31:14,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162571773] [2023-08-30 18:31:14,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162571773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:31:14,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705228175] [2023-08-30 18:31:14,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:31:14,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:31:14,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:31:14,740 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:31:14,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 18:31:14,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:31:14,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:31:14,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-30 18:31:14,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:31:15,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:31:15,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:31:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:31:15,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:31:15,753 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 [2023-08-30 18:31:15,806 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-30 18:31:15,806 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 [2023-08-30 18:31:15,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:31:15,824 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 [2023-08-30 18:31:16,122 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:31:16,122 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 [2023-08-30 18:31:16,132 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:31:16,133 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 [2023-08-30 18:31:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:31:16,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705228175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:31:16,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:31:16,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 42 [2023-08-30 18:31:16,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051711764] [2023-08-30 18:31:16,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:31:16,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-30 18:31:16,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:31:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-30 18:31:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1543, Unknown=1, NotChecked=80, Total=1806 [2023-08-30 18:31:16,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-08-30 18:31:16,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 420 transitions, 8114 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) [2023-08-30 18:31:16,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:31:16,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-08-30 18:31:16,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:31:34,358 WARN L222 SmtUtils]: Spent 10.77s 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) [2023-08-30 18:31:37,621 INFO L130 PetriNetUnfolder]: 2490/4675 cut-off events. [2023-08-30 18:31:37,621 INFO L131 PetriNetUnfolder]: For 258907/258907 co-relation queries the response was YES. [2023-08-30 18:31:37,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50983 conditions, 4675 events. 2490/4675 cut-off events. For 258907/258907 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 32298 event pairs, 505 based on Foata normal form. 35/4710 useless extension candidates. Maximal degree in co-relation 50837. Up to 4116 conditions per place. [2023-08-30 18:31:37,682 INFO L137 encePairwiseOnDemand]: 310/324 looper letters, 383 selfloop transitions, 104 changer transitions 4/491 dead transitions. [2023-08-30 18:31:37,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 491 transitions, 10083 flow [2023-08-30 18:31:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 18:31:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 18:31:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2641 transitions. [2023-08-30 18:31:37,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27170781893004115 [2023-08-30 18:31:37,686 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2641 transitions. [2023-08-30 18:31:37,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2641 transitions. [2023-08-30 18:31:37,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:31:37,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2641 transitions. [2023-08-30 18:31:37,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 88.03333333333333) internal successors, (2641), 30 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:31:37,694 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) [2023-08-30 18:31:37,695 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) [2023-08-30 18:31:37,695 INFO L175 Difference]: Start difference. First operand has 343 places, 420 transitions, 8114 flow. Second operand 30 states and 2641 transitions. [2023-08-30 18:31:37,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 491 transitions, 10083 flow [2023-08-30 18:31:38,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 491 transitions, 9791 flow, removed 101 selfloop flow, removed 22 redundant places. [2023-08-30 18:31:38,284 INFO L231 Difference]: Finished difference. Result has 333 places, 426 transitions, 8236 flow [2023-08-30 18:31:38,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7836, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8236, PETRI_PLACES=333, PETRI_TRANSITIONS=426} [2023-08-30 18:31:38,284 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 312 predicate places. [2023-08-30 18:31:38,285 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 426 transitions, 8236 flow [2023-08-30 18:31:38,285 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) [2023-08-30 18:31:38,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:31:38,285 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:31:38,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-30 18:31:38,491 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 [2023-08-30 18:31:38,492 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:31:38,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:31:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash -758541815, now seen corresponding path program 25 times [2023-08-30 18:31:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:31:38,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241359057] [2023-08-30 18:31:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:31:38,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:31:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:31:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:31:38,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:31:38,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241359057] [2023-08-30 18:31:38,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241359057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:31:38,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807414085] [2023-08-30 18:31:38,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:31:38,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:31:38,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:31:38,717 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:31:38,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 18:31:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:31:38,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 18:31:38,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:31:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:31:39,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:31:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:31:39,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807414085] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:31:39,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:31:39,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-30 18:31:39,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531478086] [2023-08-30 18:31:39,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:31:39,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 18:31:39,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:31:39,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 18:31:39,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-08-30 18:31:40,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 324 [2023-08-30 18:31:40,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 426 transitions, 8236 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) [2023-08-30 18:31:40,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:31:40,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 324 [2023-08-30 18:31:40,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:31:41,612 INFO L130 PetriNetUnfolder]: 2503/4631 cut-off events. [2023-08-30 18:31:41,612 INFO L131 PetriNetUnfolder]: For 298834/298834 co-relation queries the response was YES. [2023-08-30 18:31:41,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52845 conditions, 4631 events. 2503/4631 cut-off events. For 298834/298834 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 31321 event pairs, 252 based on Foata normal form. 69/4700 useless extension candidates. Maximal degree in co-relation 52704. Up to 1551 conditions per place. [2023-08-30 18:31:41,664 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 350 selfloop transitions, 169 changer transitions 1/520 dead transitions. [2023-08-30 18:31:41,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 520 transitions, 10903 flow [2023-08-30 18:31:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:31:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:31:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1738 transitions. [2023-08-30 18:31:41,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263057929724595 [2023-08-30 18:31:41,666 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1738 transitions. [2023-08-30 18:31:41,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1738 transitions. [2023-08-30 18:31:41,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:31:41,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1738 transitions. [2023-08-30 18:31:41,667 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) [2023-08-30 18:31:41,669 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) [2023-08-30 18:31:41,669 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) [2023-08-30 18:31:41,669 INFO L175 Difference]: Start difference. First operand has 333 places, 426 transitions, 8236 flow. Second operand 13 states and 1738 transitions. [2023-08-30 18:31:41,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 520 transitions, 10903 flow [2023-08-30 18:31:42,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 520 transitions, 10495 flow, removed 60 selfloop flow, removed 29 redundant places. [2023-08-30 18:31:42,210 INFO L231 Difference]: Finished difference. Result has 315 places, 437 transitions, 8684 flow [2023-08-30 18:31:42,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7739, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8684, PETRI_PLACES=315, PETRI_TRANSITIONS=437} [2023-08-30 18:31:42,210 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 294 predicate places. [2023-08-30 18:31:42,211 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 437 transitions, 8684 flow [2023-08-30 18:31:42,211 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) [2023-08-30 18:31:42,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:31:42,211 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:31:42,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-30 18:31:42,417 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 [2023-08-30 18:31:42,417 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:31:42,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:31:42,418 INFO L85 PathProgramCache]: Analyzing trace with hash -326833819, now seen corresponding path program 15 times [2023-08-30 18:31:42,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:31:42,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905998835] [2023-08-30 18:31:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:31:42,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:31:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:31:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:31:42,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:31:42,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905998835] [2023-08-30 18:31:42,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905998835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:31:42,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021086890] [2023-08-30 18:31:42,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:31:42,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:31:42,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:31:42,847 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:31:42,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 18:31:43,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 18:31:43,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:31:43,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:31:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:31:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:31:43,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:31:43,330 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:31:43,330 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 [2023-08-30 18:31:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:31:43,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021086890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:31:43,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:31:43,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 23 [2023-08-30 18:31:43,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413370943] [2023-08-30 18:31:43,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:31:43,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:31:43,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:31:43,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:31:43,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:31:44,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-30 18:31:44,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 437 transitions, 8684 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) [2023-08-30 18:31:44,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:31:44,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-30 18:31:44,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:31:46,415 INFO L130 PetriNetUnfolder]: 2532/4708 cut-off events. [2023-08-30 18:31:46,415 INFO L131 PetriNetUnfolder]: For 286956/286956 co-relation queries the response was YES. [2023-08-30 18:31:46,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53627 conditions, 4708 events. 2532/4708 cut-off events. For 286956/286956 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 32086 event pairs, 463 based on Foata normal form. 8/4716 useless extension candidates. Maximal degree in co-relation 53489. Up to 3536 conditions per place. [2023-08-30 18:31:46,465 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 362 selfloop transitions, 157 changer transitions 29/548 dead transitions. [2023-08-30 18:31:46,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 548 transitions, 11357 flow [2023-08-30 18:31:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 18:31:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 18:31:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2517 transitions. [2023-08-30 18:31:46,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408869395711501 [2023-08-30 18:31:46,468 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2517 transitions. [2023-08-30 18:31:46,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2517 transitions. [2023-08-30 18:31:46,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:31:46,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2517 transitions. [2023-08-30 18:31:46,471 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) [2023-08-30 18:31:46,474 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) [2023-08-30 18:31:46,474 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) [2023-08-30 18:31:46,474 INFO L175 Difference]: Start difference. First operand has 315 places, 437 transitions, 8684 flow. Second operand 19 states and 2517 transitions. [2023-08-30 18:31:46,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 548 transitions, 11357 flow [2023-08-30 18:31:47,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 548 transitions, 11278 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-08-30 18:31:47,072 INFO L231 Difference]: Finished difference. Result has 329 places, 467 transitions, 9407 flow [2023-08-30 18:31:47,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8605, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9407, PETRI_PLACES=329, PETRI_TRANSITIONS=467} [2023-08-30 18:31:47,072 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 308 predicate places. [2023-08-30 18:31:47,072 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 467 transitions, 9407 flow [2023-08-30 18:31:47,073 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) [2023-08-30 18:31:47,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:31:47,073 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:31:47,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-08-30 18:31:47,277 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 [2023-08-30 18:31:47,277 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:31:47,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:31:47,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1977088976, now seen corresponding path program 26 times [2023-08-30 18:31:47,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:31:47,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303177981] [2023-08-30 18:31:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:31:47,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:31:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:31:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:31:48,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:31:48,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303177981] [2023-08-30 18:31:48,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303177981] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:31:48,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266016200] [2023-08-30 18:31:48,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:31:48,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:31:48,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:31:48,091 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:31:48,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 18:31:48,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:31:48,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:31:48,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 18:31:48,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:31:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:31:48,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:31:49,389 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:31:49,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:31:49,425 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:31:49,425 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 [2023-08-30 18:31:49,442 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:31:49,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:31:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:31:49,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266016200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:31:49,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:31:49,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2023-08-30 18:31:49,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172251696] [2023-08-30 18:31:49,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:31:49,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 18:31:49,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:31:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 18:31:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1753, Unknown=0, NotChecked=0, Total=1980 [2023-08-30 18:31:53,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-08-30 18:31:53,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 467 transitions, 9407 flow. Second operand has 45 states, 45 states have (on average 115.62222222222222) internal successors, (5203), 45 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:31:53,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:31:53,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-08-30 18:31:53,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:31:55,462 INFO L130 PetriNetUnfolder]: 2572/4781 cut-off events. [2023-08-30 18:31:55,463 INFO L131 PetriNetUnfolder]: For 299903/299903 co-relation queries the response was YES. [2023-08-30 18:31:55,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55531 conditions, 4781 events. 2572/4781 cut-off events. For 299903/299903 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32713 event pairs, 537 based on Foata normal form. 12/4793 useless extension candidates. Maximal degree in co-relation 55387. Up to 4281 conditions per place. [2023-08-30 18:31:55,519 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 446 selfloop transitions, 64 changer transitions 0/510 dead transitions. [2023-08-30 18:31:55,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 510 transitions, 11046 flow [2023-08-30 18:31:55,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 18:31:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 18:31:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2016 transitions. [2023-08-30 18:31:55,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3660130718954248 [2023-08-30 18:31:55,521 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2016 transitions. [2023-08-30 18:31:55,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2016 transitions. [2023-08-30 18:31:55,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:31:55,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2016 transitions. [2023-08-30 18:31:55,522 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) [2023-08-30 18:31:55,524 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) [2023-08-30 18:31:55,525 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) [2023-08-30 18:31:55,525 INFO L175 Difference]: Start difference. First operand has 329 places, 467 transitions, 9407 flow. Second operand 17 states and 2016 transitions. [2023-08-30 18:31:55,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 510 transitions, 11046 flow [2023-08-30 18:31:56,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 510 transitions, 10778 flow, removed 34 selfloop flow, removed 9 redundant places. [2023-08-30 18:31:56,283 INFO L231 Difference]: Finished difference. Result has 336 places, 475 transitions, 9465 flow [2023-08-30 18:31:56,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=9139, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9465, PETRI_PLACES=336, PETRI_TRANSITIONS=475} [2023-08-30 18:31:56,284 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-08-30 18:31:56,284 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 475 transitions, 9465 flow [2023-08-30 18:31:56,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 115.62222222222222) internal successors, (5203), 45 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:31:56,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:31:56,286 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:31:56,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-30 18:31:56,489 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 [2023-08-30 18:31:56,489 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:31:56,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:31:56,489 INFO L85 PathProgramCache]: Analyzing trace with hash 93397669, now seen corresponding path program 16 times [2023-08-30 18:31:56,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:31:56,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545685184] [2023-08-30 18:31:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:31:56,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:31:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:31:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:31:56,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:31:56,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545685184] [2023-08-30 18:31:56,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545685184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:31:56,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155684660] [2023-08-30 18:31:56,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:31:56,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:31:56,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:31:56,977 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:31:57,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 18:31:57,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:31:57,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:31:57,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 18:31:57,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:31:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:31:57,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:31:57,596 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:31:57,597 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 [2023-08-30 18:31:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:31:57,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155684660] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:31:57,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:31:57,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 27 [2023-08-30 18:31:57,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73916515] [2023-08-30 18:31:57,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:31:57,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 18:31:57,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:31:57,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 18:31:57,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2023-08-30 18:32:01,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:32:02,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 324 [2023-08-30 18:32:02,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 475 transitions, 9465 flow. Second operand has 28 states, 28 states have (on average 127.10714285714286) internal successors, (3559), 28 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:02,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:32:02,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 324 [2023-08-30 18:32:02,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:32:05,828 INFO L130 PetriNetUnfolder]: 2613/4863 cut-off events. [2023-08-30 18:32:05,828 INFO L131 PetriNetUnfolder]: For 316900/316900 co-relation queries the response was YES. [2023-08-30 18:32:05,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56769 conditions, 4863 events. 2613/4863 cut-off events. For 316900/316900 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 33431 event pairs, 500 based on Foata normal form. 12/4875 useless extension candidates. Maximal degree in co-relation 56622. Up to 3688 conditions per place. [2023-08-30 18:32:05,887 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 346 selfloop transitions, 193 changer transitions 14/553 dead transitions. [2023-08-30 18:32:05,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 553 transitions, 11951 flow [2023-08-30 18:32:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:32:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:32:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2881 transitions. [2023-08-30 18:32:05,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041806958473625 [2023-08-30 18:32:05,889 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2881 transitions. [2023-08-30 18:32:05,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2881 transitions. [2023-08-30 18:32:05,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:32:05,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2881 transitions. [2023-08-30 18:32:05,891 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) [2023-08-30 18:32:05,894 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) [2023-08-30 18:32:05,894 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) [2023-08-30 18:32:05,894 INFO L175 Difference]: Start difference. First operand has 336 places, 475 transitions, 9465 flow. Second operand 22 states and 2881 transitions. [2023-08-30 18:32:05,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 553 transitions, 11951 flow [2023-08-30 18:32:06,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 553 transitions, 11810 flow, removed 23 selfloop flow, removed 13 redundant places. [2023-08-30 18:32:06,539 INFO L231 Difference]: Finished difference. Result has 348 places, 494 transitions, 10169 flow [2023-08-30 18:32:06,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=9324, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10169, PETRI_PLACES=348, PETRI_TRANSITIONS=494} [2023-08-30 18:32:06,540 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 327 predicate places. [2023-08-30 18:32:06,540 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 494 transitions, 10169 flow [2023-08-30 18:32:06,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 127.10714285714286) internal successors, (3559), 28 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:06,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:32:06,541 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:32:06,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 18:32:06,741 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 [2023-08-30 18:32:06,741 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:32:06,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:32:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash -725040933, now seen corresponding path program 17 times [2023-08-30 18:32:06,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:32:06,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046570871] [2023-08-30 18:32:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:32:06,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:32:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:32:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:32:07,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:32:07,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046570871] [2023-08-30 18:32:07,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046570871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:32:07,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341371615] [2023-08-30 18:32:07,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:32:07,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:32:07,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:32:07,165 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:32:07,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 18:32:07,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 18:32:07,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:32:07,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:32:07,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:32:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:32:07,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:32:07,602 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:32:07,602 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 [2023-08-30 18:32:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:32:07,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341371615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:32:07,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:32:07,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 23 [2023-08-30 18:32:07,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26336981] [2023-08-30 18:32:07,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:32:07,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:32:07,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:32:07,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:32:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:32:08,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-30 18:32:08,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 494 transitions, 10169 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) [2023-08-30 18:32:08,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:32:08,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-30 18:32:08,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:32:10,845 INFO L130 PetriNetUnfolder]: 2604/4857 cut-off events. [2023-08-30 18:32:10,845 INFO L131 PetriNetUnfolder]: For 330494/330494 co-relation queries the response was YES. [2023-08-30 18:32:10,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58031 conditions, 4857 events. 2604/4857 cut-off events. For 330494/330494 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33508 event pairs, 501 based on Foata normal form. 12/4869 useless extension candidates. Maximal degree in co-relation 57880. Up to 3684 conditions per place. [2023-08-30 18:32:10,902 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 354 selfloop transitions, 184 changer transitions 21/559 dead transitions. [2023-08-30 18:32:10,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 559 transitions, 12335 flow [2023-08-30 18:32:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 18:32:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 18:32:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2644 transitions. [2023-08-30 18:32:10,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080246913580247 [2023-08-30 18:32:10,904 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2644 transitions. [2023-08-30 18:32:10,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2644 transitions. [2023-08-30 18:32:10,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:32:10,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2644 transitions. [2023-08-30 18:32:10,906 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) [2023-08-30 18:32:10,909 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) [2023-08-30 18:32:10,909 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) [2023-08-30 18:32:10,910 INFO L175 Difference]: Start difference. First operand has 348 places, 494 transitions, 10169 flow. Second operand 20 states and 2644 transitions. [2023-08-30 18:32:10,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 559 transitions, 12335 flow [2023-08-30 18:32:11,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 559 transitions, 12076 flow, removed 41 selfloop flow, removed 13 redundant places. [2023-08-30 18:32:11,622 INFO L231 Difference]: Finished difference. Result has 352 places, 493 transitions, 10273 flow [2023-08-30 18:32:11,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=9910, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10273, PETRI_PLACES=352, PETRI_TRANSITIONS=493} [2023-08-30 18:32:11,623 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 331 predicate places. [2023-08-30 18:32:11,623 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 493 transitions, 10273 flow [2023-08-30 18:32:11,623 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) [2023-08-30 18:32:11,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:32:11,623 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:32:11,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-30 18:32:11,824 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 [2023-08-30 18:32:11,824 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:32:11,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:32:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1588312397, now seen corresponding path program 18 times [2023-08-30 18:32:11,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:32:11,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823128501] [2023-08-30 18:32:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:32:11,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:32:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:32:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:32:12,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:32:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823128501] [2023-08-30 18:32:12,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823128501] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:32:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121303913] [2023-08-30 18:32:12,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:32:12,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:32:12,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:32:12,409 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:32:12,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 18:32:12,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:32:12,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:32:12,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 18:32:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:32:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:32:12,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:32:13,029 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:32:13,029 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 [2023-08-30 18:32:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:32:13,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121303913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:32:13,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:32:13,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 28 [2023-08-30 18:32:13,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518941024] [2023-08-30 18:32:13,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:32:13,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 18:32:13,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:32:13,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 18:32:13,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2023-08-30 18:32:16,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-30 18:32:16,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 493 transitions, 10273 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) [2023-08-30 18:32:16,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:32:16,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-30 18:32:16,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:32:18,948 INFO L130 PetriNetUnfolder]: 2590/4820 cut-off events. [2023-08-30 18:32:18,948 INFO L131 PetriNetUnfolder]: For 329305/329305 co-relation queries the response was YES. [2023-08-30 18:32:18,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57853 conditions, 4820 events. 2590/4820 cut-off events. For 329305/329305 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 33093 event pairs, 499 based on Foata normal form. 12/4832 useless extension candidates. Maximal degree in co-relation 57703. Up to 3611 conditions per place. [2023-08-30 18:32:19,008 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 350 selfloop transitions, 205 changer transitions 2/557 dead transitions. [2023-08-30 18:32:19,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 557 transitions, 12686 flow [2023-08-30 18:32:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 18:32:19,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 18:32:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3028 transitions. [2023-08-30 18:32:19,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.406333870101986 [2023-08-30 18:32:19,011 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3028 transitions. [2023-08-30 18:32:19,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3028 transitions. [2023-08-30 18:32:19,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:32:19,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3028 transitions. [2023-08-30 18:32:19,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 131.65217391304347) internal successors, (3028), 23 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:19,016 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) [2023-08-30 18:32:19,016 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) [2023-08-30 18:32:19,016 INFO L175 Difference]: Start difference. First operand has 352 places, 493 transitions, 10273 flow. Second operand 23 states and 3028 transitions. [2023-08-30 18:32:19,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 557 transitions, 12686 flow [2023-08-30 18:32:19,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 557 transitions, 12317 flow, removed 9 selfloop flow, removed 15 redundant places. [2023-08-30 18:32:19,906 INFO L231 Difference]: Finished difference. Result has 358 places, 496 transitions, 10435 flow [2023-08-30 18:32:19,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=9916, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10435, PETRI_PLACES=358, PETRI_TRANSITIONS=496} [2023-08-30 18:32:19,906 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 337 predicate places. [2023-08-30 18:32:19,906 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 496 transitions, 10435 flow [2023-08-30 18:32:19,907 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) [2023-08-30 18:32:19,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:32:19,907 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:32:19,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 18:32:20,114 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 [2023-08-30 18:32:20,114 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:32:20,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:32:20,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2023043557, now seen corresponding path program 19 times [2023-08-30 18:32:20,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:32:20,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125769171] [2023-08-30 18:32:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:32:20,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:32:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:32:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:32:20,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:32:20,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125769171] [2023-08-30 18:32:20,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125769171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:32:20,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395302779] [2023-08-30 18:32:20,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:32:20,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:32:20,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:32:20,505 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:32:20,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 18:32:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:32:20,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:32:20,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:32:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:32:20,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:32:21,020 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:32:21,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-30 18:32:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:32:21,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395302779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:32:21,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:32:21,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 6] total 22 [2023-08-30 18:32:21,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179046867] [2023-08-30 18:32:21,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:32:21,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:32:21,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:32:21,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:32:21,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:32:22,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-30 18:32:22,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 496 transitions, 10435 flow. Second operand has 23 states, 23 states have (on average 128.2608695652174) internal successors, (2950), 23 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:22,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:32:22,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-30 18:32:22,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:32:23,908 INFO L130 PetriNetUnfolder]: 2696/5015 cut-off events. [2023-08-30 18:32:23,908 INFO L131 PetriNetUnfolder]: For 344709/344709 co-relation queries the response was YES. [2023-08-30 18:32:23,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60753 conditions, 5015 events. 2696/5015 cut-off events. For 344709/344709 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34750 event pairs, 393 based on Foata normal form. 12/5027 useless extension candidates. Maximal degree in co-relation 60602. Up to 3432 conditions per place. [2023-08-30 18:32:24,070 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 397 selfloop transitions, 208 changer transitions 4/609 dead transitions. [2023-08-30 18:32:24,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 609 transitions, 13889 flow [2023-08-30 18:32:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:32:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:32:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2930 transitions. [2023-08-30 18:32:24,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110549943883277 [2023-08-30 18:32:24,073 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2930 transitions. [2023-08-30 18:32:24,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2930 transitions. [2023-08-30 18:32:24,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:32:24,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2930 transitions. [2023-08-30 18:32:24,076 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) [2023-08-30 18:32:24,079 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) [2023-08-30 18:32:24,080 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) [2023-08-30 18:32:24,080 INFO L175 Difference]: Start difference. First operand has 358 places, 496 transitions, 10435 flow. Second operand 22 states and 2930 transitions. [2023-08-30 18:32:24,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 609 transitions, 13889 flow [2023-08-30 18:32:24,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 609 transitions, 13496 flow, removed 4 selfloop flow, removed 19 redundant places. [2023-08-30 18:32:24,840 INFO L231 Difference]: Finished difference. Result has 364 places, 509 transitions, 10824 flow [2023-08-30 18:32:24,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=10062, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10824, PETRI_PLACES=364, PETRI_TRANSITIONS=509} [2023-08-30 18:32:24,841 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 343 predicate places. [2023-08-30 18:32:24,841 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 509 transitions, 10824 flow [2023-08-30 18:32:24,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 128.2608695652174) internal successors, (2950), 23 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:24,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:32:24,842 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:32:24,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-30 18:32:25,042 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 [2023-08-30 18:32:25,043 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:32:25,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:32:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1756967216, now seen corresponding path program 27 times [2023-08-30 18:32:25,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:32:25,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617634565] [2023-08-30 18:32:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:32:25,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:32:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:32:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:32:25,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:32:25,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617634565] [2023-08-30 18:32:25,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617634565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:32:25,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057343982] [2023-08-30 18:32:25,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:32:25,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:32:25,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:32:25,658 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:32:25,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 18:32:25,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 18:32:25,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:32:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 18:32:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:32:26,539 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:32:26,543 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-08-30 18:32:26,544 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 28 treesize of output 1 [2023-08-30 18:32:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:32:26,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:32:27,142 INFO L321 Elim1Store]: treesize reduction 26, result has 86.7 percent of original size [2023-08-30 18:32:27,142 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 [2023-08-30 18:32:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:32:27,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057343982] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:32:27,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:32:27,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-08-30 18:32:27,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621515259] [2023-08-30 18:32:27,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:32:27,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-30 18:32:27,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:32:27,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-30 18:32:27,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1738, Unknown=0, NotChecked=0, Total=1980 [2023-08-30 18:32:32,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-30 18:32:32,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 509 transitions, 10824 flow. Second operand has 45 states, 45 states have (on average 113.66666666666667) internal successors, (5115), 45 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:32,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:32:32,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-30 18:32:32,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:32:44,016 INFO L130 PetriNetUnfolder]: 4782/8794 cut-off events. [2023-08-30 18:32:44,016 INFO L131 PetriNetUnfolder]: For 629256/629256 co-relation queries the response was YES. [2023-08-30 18:32:44,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106020 conditions, 8794 events. 4782/8794 cut-off events. For 629256/629256 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 66877 event pairs, 187 based on Foata normal form. 101/8895 useless extension candidates. Maximal degree in co-relation 103563. Up to 3927 conditions per place. [2023-08-30 18:32:44,134 INFO L137 encePairwiseOnDemand]: 311/324 looper letters, 515 selfloop transitions, 830 changer transitions 32/1377 dead transitions. [2023-08-30 18:32:44,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1377 transitions, 29346 flow [2023-08-30 18:32:44,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-08-30 18:32:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-08-30 18:32:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 11726 transitions. [2023-08-30 18:32:44,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36191358024691356 [2023-08-30 18:32:44,141 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 11726 transitions. [2023-08-30 18:32:44,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 11726 transitions. [2023-08-30 18:32:44,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:32:44,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 11726 transitions. [2023-08-30 18:32:44,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 117.26) internal successors, (11726), 100 states have internal predecessors, (11726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:44,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 324.0) internal successors, (32724), 101 states have internal predecessors, (32724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:44,175 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 324.0) internal successors, (32724), 101 states have internal predecessors, (32724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:44,175 INFO L175 Difference]: Start difference. First operand has 364 places, 509 transitions, 10824 flow. Second operand 100 states and 11726 transitions. [2023-08-30 18:32:44,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1377 transitions, 29346 flow [2023-08-30 18:32:46,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 1377 transitions, 28248 flow, removed 174 selfloop flow, removed 15 redundant places. [2023-08-30 18:32:46,055 INFO L231 Difference]: Finished difference. Result has 473 places, 1091 transitions, 25829 flow [2023-08-30 18:32:46,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=10417, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=25829, PETRI_PLACES=473, PETRI_TRANSITIONS=1091} [2023-08-30 18:32:46,056 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 452 predicate places. [2023-08-30 18:32:46,056 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 1091 transitions, 25829 flow [2023-08-30 18:32:46,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 113.66666666666667) internal successors, (5115), 45 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:32:46,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:32:46,057 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:32:46,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-30 18:32:46,257 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 [2023-08-30 18:32:46,258 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:32:46,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:32:46,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1305015792, now seen corresponding path program 28 times [2023-08-30 18:32:46,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:32:46,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4185747] [2023-08-30 18:32:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:32:46,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:32:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:32:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:32:46,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:32:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4185747] [2023-08-30 18:32:46,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4185747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:32:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374494882] [2023-08-30 18:32:46,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:32:46,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:32:46,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:32:46,935 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:32:46,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-30 18:32:47,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:32:47,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:32:47,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:32:47,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:32:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:32:47,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:32:47,974 INFO L321 Elim1Store]: treesize reduction 15, result has 93.1 percent of original size [2023-08-30 18:32:47,975 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 [2023-08-30 18:32:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:32:53,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374494882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:32:53,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:32:53,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 32 [2023-08-30 18:32:53,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924512608] [2023-08-30 18:32:53,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:32:53,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 18:32:53,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:32:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 18:32:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 18:33:00,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:33:00,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 324 [2023-08-30 18:33:00,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 1091 transitions, 25829 flow. Second operand has 33 states, 33 states have (on average 114.9090909090909) internal successors, (3792), 33 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:33:00,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:33:00,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 324 [2023-08-30 18:33:00,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:33:04,581 INFO L130 PetriNetUnfolder]: 4687/8538 cut-off events. [2023-08-30 18:33:04,582 INFO L131 PetriNetUnfolder]: For 856115/856115 co-relation queries the response was YES. [2023-08-30 18:33:04,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117610 conditions, 8538 events. 4687/8538 cut-off events. For 856115/856115 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 64015 event pairs, 769 based on Foata normal form. 38/8576 useless extension candidates. Maximal degree in co-relation 116995. Up to 6422 conditions per place. [2023-08-30 18:33:04,713 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 692 selfloop transitions, 423 changer transitions 21/1136 dead transitions. [2023-08-30 18:33:04,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1136 transitions, 28893 flow [2023-08-30 18:33:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 18:33:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 18:33:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3171 transitions. [2023-08-30 18:33:04,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36248285322359397 [2023-08-30 18:33:04,715 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3171 transitions. [2023-08-30 18:33:04,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3171 transitions. [2023-08-30 18:33:04,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:33:04,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3171 transitions. [2023-08-30 18:33:04,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 117.44444444444444) internal successors, (3171), 27 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:33:04,721 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) [2023-08-30 18:33:04,721 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) [2023-08-30 18:33:04,721 INFO L175 Difference]: Start difference. First operand has 473 places, 1091 transitions, 25829 flow. Second operand 27 states and 3171 transitions. [2023-08-30 18:33:04,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1136 transitions, 28893 flow [2023-08-30 18:33:08,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 1136 transitions, 25177 flow, removed 1719 selfloop flow, removed 19 redundant places. [2023-08-30 18:33:08,532 INFO L231 Difference]: Finished difference. Result has 482 places, 1069 transitions, 22722 flow [2023-08-30 18:33:08,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=21834, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=22722, PETRI_PLACES=482, PETRI_TRANSITIONS=1069} [2023-08-30 18:33:08,533 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 461 predicate places. [2023-08-30 18:33:08,533 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 1069 transitions, 22722 flow [2023-08-30 18:33:08,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 114.9090909090909) internal successors, (3792), 33 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:33:08,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:33:08,534 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:33:08,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-30 18:33:08,734 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 [2023-08-30 18:33:08,734 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:33:08,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:33:08,735 INFO L85 PathProgramCache]: Analyzing trace with hash -221522992, now seen corresponding path program 29 times [2023-08-30 18:33:08,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:33:08,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676043748] [2023-08-30 18:33:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:33:08,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:33:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:33:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:33:09,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:33:09,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676043748] [2023-08-30 18:33:09,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676043748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:33:09,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96354047] [2023-08-30 18:33:09,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:33:09,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:33:09,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:33:09,383 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:33:09,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-30 18:33:09,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:33:09,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:33:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 18:33:09,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:33:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 18:33:10,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:33:10,351 INFO L321 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-08-30 18:33:10,351 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 [2023-08-30 18:33:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:33:11,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96354047] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:33:11,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:33:11,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 8] total 33 [2023-08-30 18:33:11,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415028837] [2023-08-30 18:33:11,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:33:11,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 18:33:11,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:33:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 18:33:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 18:33:14,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 324 [2023-08-30 18:33:14,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 1069 transitions, 22722 flow. Second operand has 34 states, 34 states have (on average 114.97058823529412) internal successors, (3909), 34 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:33:14,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:33:14,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 324 [2023-08-30 18:33:14,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:33:18,919 INFO L130 PetriNetUnfolder]: 4824/8839 cut-off events. [2023-08-30 18:33:18,919 INFO L131 PetriNetUnfolder]: For 909720/909720 co-relation queries the response was YES. [2023-08-30 18:33:19,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112130 conditions, 8839 events. 4824/8839 cut-off events. For 909720/909720 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 66883 event pairs, 734 based on Foata normal form. 164/9003 useless extension candidates. Maximal degree in co-relation 111955. Up to 6220 conditions per place. [2023-08-30 18:33:19,078 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 745 selfloop transitions, 537 changer transitions 14/1296 dead transitions. [2023-08-30 18:33:19,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1296 transitions, 29703 flow [2023-08-30 18:33:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 18:33:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 18:33:19,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 5098 transitions. [2023-08-30 18:33:19,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36592018374964114 [2023-08-30 18:33:19,082 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 5098 transitions. [2023-08-30 18:33:19,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 5098 transitions. [2023-08-30 18:33:19,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:33:19,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 5098 transitions. [2023-08-30 18:33:19,087 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) [2023-08-30 18:33:19,092 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) [2023-08-30 18:33:19,093 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) [2023-08-30 18:33:19,093 INFO L175 Difference]: Start difference. First operand has 482 places, 1069 transitions, 22722 flow. Second operand 43 states and 5098 transitions. [2023-08-30 18:33:19,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1296 transitions, 29703 flow [2023-08-30 18:33:22,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1296 transitions, 28553 flow, removed 87 selfloop flow, removed 27 redundant places. [2023-08-30 18:33:22,388 INFO L231 Difference]: Finished difference. Result has 509 places, 1142 transitions, 25083 flow [2023-08-30 18:33:22,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=21741, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=25083, PETRI_PLACES=509, PETRI_TRANSITIONS=1142} [2023-08-30 18:33:22,389 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 488 predicate places. [2023-08-30 18:33:22,389 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 1142 transitions, 25083 flow [2023-08-30 18:33:22,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 114.97058823529412) internal successors, (3909), 34 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:33:22,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:33:22,389 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:33:22,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-30 18:33:22,590 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 [2023-08-30 18:33:22,590 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:33:22,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:33:22,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1673633428, now seen corresponding path program 30 times [2023-08-30 18:33:22,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:33:22,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877784005] [2023-08-30 18:33:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:33:22,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:33:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:33:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:33:23,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:33:23,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877784005] [2023-08-30 18:33:23,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877784005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:33:23,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875656314] [2023-08-30 18:33:23,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:33:23,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:33:23,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:33:23,436 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:33:23,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-30 18:33:23,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-30 18:33:23,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:33:23,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-30 18:33:23,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:33:24,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:33:24,072 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 [2023-08-30 18:33:24,125 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 [2023-08-30 18:33:24,407 INFO L321 Elim1Store]: treesize reduction 48, result has 15.8 percent of original size [2023-08-30 18:33:24,407 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 28 treesize of output 16 [2023-08-30 18:33:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:33:24,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:33:41,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:33:41,546 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 58 treesize of output 47 [2023-08-30 18:33:41,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:33:41,559 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 454 treesize of output 394 [2023-08-30 18:33:41,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:33:41,572 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 382 treesize of output 279 [2023-08-30 18:33:41,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:33:41,585 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 270 treesize of output 223 [2023-08-30 18:33:41,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:33:41,672 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 [2023-08-30 18:33:41,720 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:33:41,720 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 3628 treesize of output 3104 [2023-08-30 18:33:41,793 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:33:41,795 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:33:41,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:33:41,818 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 686 [2023-08-30 18:33:41,843 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:33:41,846 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:33:41,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:33:41,870 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 636 treesize of output 462 [2023-08-30 18:33:43,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:33:43,698 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 [2023-08-30 18:33:43,744 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:33:43,744 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 892 treesize of output 800 [2023-08-30 18:33:43,759 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:33:43,763 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:33:43,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:33:43,783 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 574 [2023-08-30 18:33:43,801 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:33:43,803 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:33:43,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:33:43,827 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 462 [2023-08-30 18:33:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 16 refuted. 3 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:33:48,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875656314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:33:48,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:33:48,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 48 [2023-08-30 18:33:48,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226173936] [2023-08-30 18:33:48,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:33:48,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 18:33:48,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:33:48,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 18:33:48,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2024, Unknown=15, NotChecked=0, Total=2352 [2023-08-30 18:33:50,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:33:52,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:33:54,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:33:56,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:33:58,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:00,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:02,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:04,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:06,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:08,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:10,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:12,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:14,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:16,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:18,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:20,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:22,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:25,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:27,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:29,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:31,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:33,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:35,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:37,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:39,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:41,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:43,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:45,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:47,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:49,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:51,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:53,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:55,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:57,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:34:59,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:35:01,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 18:35:01,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-08-30 18:35:01,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 1142 transitions, 25083 flow. Second operand has 49 states, 49 states have (on average 81.51020408163265) internal successors, (3994), 49 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:35:01,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:35:01,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-08-30 18:35:01,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:35:32,733 WARN L222 SmtUtils]: Spent 10.45s on a formula simplification that was a NOOP. DAG size: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 18:35:41,963 INFO L130 PetriNetUnfolder]: 10029/18421 cut-off events. [2023-08-30 18:35:41,963 INFO L131 PetriNetUnfolder]: For 3693675/3693675 co-relation queries the response was YES. [2023-08-30 18:35:42,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297772 conditions, 18421 events. 10029/18421 cut-off events. For 3693675/3693675 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 157978 event pairs, 644 based on Foata normal form. 118/18539 useless extension candidates. Maximal degree in co-relation 297585. Up to 6406 conditions per place. [2023-08-30 18:35:42,268 INFO L137 encePairwiseOnDemand]: 311/324 looper letters, 977 selfloop transitions, 1731 changer transitions 38/2746 dead transitions. [2023-08-30 18:35:42,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 2746 transitions, 68485 flow [2023-08-30 18:35:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-08-30 18:35:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-08-30 18:35:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 7149 transitions. [2023-08-30 18:35:42,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26584114234716644 [2023-08-30 18:35:42,273 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 7149 transitions. [2023-08-30 18:35:42,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 7149 transitions. [2023-08-30 18:35:42,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:35:42,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 7149 transitions. [2023-08-30 18:35:42,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 86.13253012048193) internal successors, (7149), 83 states have internal predecessors, (7149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:35:42,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 324.0) internal successors, (27216), 84 states have internal predecessors, (27216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:35:42,290 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 324.0) internal successors, (27216), 84 states have internal predecessors, (27216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:35:42,291 INFO L175 Difference]: Start difference. First operand has 509 places, 1142 transitions, 25083 flow. Second operand 83 states and 7149 transitions. [2023-08-30 18:35:42,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 2746 transitions, 68485 flow [2023-08-30 18:35:53,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 2746 transitions, 66311 flow, removed 529 selfloop flow, removed 20 redundant places. [2023-08-30 18:35:53,136 INFO L231 Difference]: Finished difference. Result has 609 places, 2247 transitions, 59360 flow [2023-08-30 18:35:53,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=23910, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=755, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=59360, PETRI_PLACES=609, PETRI_TRANSITIONS=2247} [2023-08-30 18:35:53,138 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 588 predicate places. [2023-08-30 18:35:53,138 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 2247 transitions, 59360 flow [2023-08-30 18:35:53,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 81.51020408163265) internal successors, (3994), 49 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:35:53,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:35:53,139 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:35:53,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-30 18:35:53,345 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 [2023-08-30 18:35:53,345 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:35:53,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:35:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1011529933, now seen corresponding path program 20 times [2023-08-30 18:35:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:35:53,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776431305] [2023-08-30 18:35:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:35:53,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:35:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:35:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:35:53,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:35:53,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776431305] [2023-08-30 18:35:53,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776431305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:35:53,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006813497] [2023-08-30 18:35:53,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:35:53,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:35:53,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:35:53,687 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:35:53,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-30 18:35:53,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:35:53,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:35:53,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 18:35:53,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:35:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:35:54,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:35:54,161 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-30 18:35:54,161 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 [2023-08-30 18:35:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:35:54,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006813497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:35:54,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:35:54,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 26 [2023-08-30 18:35:54,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801621171] [2023-08-30 18:35:54,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:35:54,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 18:35:54,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:35:54,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 18:35:54,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2023-08-30 18:35:55,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-30 18:35:55,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 2247 transitions, 59360 flow. Second operand has 27 states, 27 states have (on average 128.25925925925927) internal successors, (3463), 27 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:35:55,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:35:55,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-30 18:35:55,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:36:11,427 INFO L130 PetriNetUnfolder]: 10987/20155 cut-off events. [2023-08-30 18:36:11,427 INFO L131 PetriNetUnfolder]: For 5693325/5693325 co-relation queries the response was YES. [2023-08-30 18:36:11,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378130 conditions, 20155 events. 10987/20155 cut-off events. For 5693325/5693325 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 174444 event pairs, 1311 based on Foata normal form. 292/20447 useless extension candidates. Maximal degree in co-relation 377902. Up to 12303 conditions per place. [2023-08-30 18:36:11,832 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 1745 selfloop transitions, 976 changer transitions 8/2729 dead transitions. [2023-08-30 18:36:11,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 2729 transitions, 82067 flow [2023-08-30 18:36:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 18:36:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 18:36:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4091 transitions. [2023-08-30 18:36:11,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40730784547988846 [2023-08-30 18:36:11,835 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4091 transitions. [2023-08-30 18:36:11,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4091 transitions. [2023-08-30 18:36:11,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:36:11,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4091 transitions. [2023-08-30 18:36:11,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 131.96774193548387) internal successors, (4091), 31 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:36:11,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:36:11,842 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:36:11,842 INFO L175 Difference]: Start difference. First operand has 609 places, 2247 transitions, 59360 flow. Second operand 31 states and 4091 transitions. [2023-08-30 18:36:11,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 2729 transitions, 82067 flow [2023-08-30 18:36:46,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 2729 transitions, 74854 flow, removed 3457 selfloop flow, removed 29 redundant places. [2023-08-30 18:36:46,153 INFO L231 Difference]: Finished difference. Result has 621 places, 2449 transitions, 64660 flow [2023-08-30 18:36:46,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=55452, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=813, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=64660, PETRI_PLACES=621, PETRI_TRANSITIONS=2449} [2023-08-30 18:36:46,154 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 600 predicate places. [2023-08-30 18:36:46,155 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 2449 transitions, 64660 flow [2023-08-30 18:36:46,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 128.25925925925927) internal successors, (3463), 27 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:36:46,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:36:46,155 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:36:46,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-30 18:36:46,355 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 [2023-08-30 18:36:46,356 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:36:46,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:36:46,356 INFO L85 PathProgramCache]: Analyzing trace with hash 217840293, now seen corresponding path program 21 times [2023-08-30 18:36:46,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:36:46,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306301435] [2023-08-30 18:36:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:36:46,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:36:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:36:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:36:46,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:36:46,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306301435] [2023-08-30 18:36:46,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306301435] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:36:46,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331631429] [2023-08-30 18:36:46,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:36:46,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:36:46,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:36:46,737 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:36:46,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-30 18:36:47,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 18:36:47,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:36:47,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 18:36:47,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:36:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:36:47,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:36:47,476 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:36:47,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-30 18:36:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 18:36:47,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331631429] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:36:47,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:36:47,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 6] total 22 [2023-08-30 18:36:47,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688469071] [2023-08-30 18:36:47,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:36:47,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 18:36:47,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:36:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 18:36:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-08-30 18:36:48,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-30 18:36:48,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 2449 transitions, 64660 flow. Second operand has 23 states, 23 states have (on average 128.3913043478261) internal successors, (2953), 23 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:36:48,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:36:48,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-30 18:36:48,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:37:04,892 INFO L130 PetriNetUnfolder]: 10869/19966 cut-off events. [2023-08-30 18:37:04,892 INFO L131 PetriNetUnfolder]: For 4765209/4765209 co-relation queries the response was YES. [2023-08-30 18:37:05,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350767 conditions, 19966 events. 10869/19966 cut-off events. For 4765209/4765209 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 172760 event pairs, 1717 based on Foata normal form. 76/20042 useless extension candidates. Maximal degree in co-relation 350530. Up to 16224 conditions per place. [2023-08-30 18:37:05,314 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 1925 selfloop transitions, 616 changer transitions 33/2574 dead transitions. [2023-08-30 18:37:05,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 2574 transitions, 73765 flow [2023-08-30 18:37:05,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 18:37:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 18:37:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3039 transitions. [2023-08-30 18:37:05,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4078099838969404 [2023-08-30 18:37:05,316 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3039 transitions. [2023-08-30 18:37:05,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3039 transitions. [2023-08-30 18:37:05,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:37:05,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3039 transitions. [2023-08-30 18:37:05,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 132.1304347826087) internal successors, (3039), 23 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:37:05,321 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) [2023-08-30 18:37:05,321 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) [2023-08-30 18:37:05,321 INFO L175 Difference]: Start difference. First operand has 621 places, 2449 transitions, 64660 flow. Second operand 23 states and 3039 transitions. [2023-08-30 18:37:05,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 2574 transitions, 73765 flow [2023-08-30 18:37:24,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 2574 transitions, 72420 flow, removed 467 selfloop flow, removed 13 redundant places. [2023-08-30 18:37:24,986 INFO L231 Difference]: Finished difference. Result has 634 places, 2453 transitions, 65120 flow [2023-08-30 18:37:24,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=63183, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=65120, PETRI_PLACES=634, PETRI_TRANSITIONS=2453} [2023-08-30 18:37:24,988 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 613 predicate places. [2023-08-30 18:37:24,988 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 2453 transitions, 65120 flow [2023-08-30 18:37:24,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 128.3913043478261) internal successors, (2953), 23 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:37:24,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:37:24,988 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:37:24,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-30 18:37:25,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:37:25,189 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:37:25,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:37:25,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1572075405, now seen corresponding path program 22 times [2023-08-30 18:37:25,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:37:25,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022649238] [2023-08-30 18:37:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:37:25,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:37:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:37:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:37:25,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:37:25,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022649238] [2023-08-30 18:37:25,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022649238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:37:25,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470947856] [2023-08-30 18:37:25,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:37:25,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:37:25,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:37:25,588 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:37:25,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-30 18:37:25,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:37:25,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:37:25,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 18:37:25,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:37:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-30 18:37:26,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:37:26,118 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:37:26,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-30 18:37:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 18:37:26,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470947856] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:37:26,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:37:26,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 6] total 25 [2023-08-30 18:37:26,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061690312] [2023-08-30 18:37:26,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:37:26,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 18:37:26,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:37:26,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 18:37:26,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-08-30 18:37:27,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 324 [2023-08-30 18:37:27,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 2453 transitions, 65120 flow. Second operand has 26 states, 26 states have (on average 128.42307692307693) internal successors, (3339), 26 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:37:27,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:37:27,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 324 [2023-08-30 18:37:27,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:37:42,971 INFO L130 PetriNetUnfolder]: 10723/19587 cut-off events. [2023-08-30 18:37:42,972 INFO L131 PetriNetUnfolder]: For 4479586/4479586 co-relation queries the response was YES. [2023-08-30 18:37:43,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340757 conditions, 19587 events. 10723/19587 cut-off events. For 4479586/4479586 co-relation queries the response was YES. Maximal size of possible extension queue 1145. Compared 167908 event pairs, 1665 based on Foata normal form. 92/19679 useless extension candidates. Maximal degree in co-relation 340516. Up to 15820 conditions per place. [2023-08-30 18:37:43,517 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 1903 selfloop transitions, 691 changer transitions 8/2602 dead transitions. [2023-08-30 18:37:43,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 2602 transitions, 75377 flow [2023-08-30 18:37:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 18:37:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 18:37:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3551 transitions. [2023-08-30 18:37:43,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40592135345221764 [2023-08-30 18:37:43,519 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3551 transitions. [2023-08-30 18:37:43,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3551 transitions. [2023-08-30 18:37:43,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:37:43,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3551 transitions. [2023-08-30 18:37:43,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 131.5185185185185) internal successors, (3551), 27 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:37:43,525 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) [2023-08-30 18:37:43,525 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) [2023-08-30 18:37:43,525 INFO L175 Difference]: Start difference. First operand has 634 places, 2453 transitions, 65120 flow. Second operand 27 states and 3551 transitions. [2023-08-30 18:37:43,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 2602 transitions, 75377 flow [2023-08-30 18:38:02,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 2602 transitions, 73913 flow, removed 74 selfloop flow, removed 21 redundant places. [2023-08-30 18:38:02,550 INFO L231 Difference]: Finished difference. Result has 642 places, 2481 transitions, 66167 flow [2023-08-30 18:38:02,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=63698, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=663, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=66167, PETRI_PLACES=642, PETRI_TRANSITIONS=2481} [2023-08-30 18:38:02,552 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 621 predicate places. [2023-08-30 18:38:02,552 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 2481 transitions, 66167 flow [2023-08-30 18:38:02,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 128.42307692307693) internal successors, (3339), 26 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:38:02,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:38:02,552 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:38:02,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-08-30 18:38:02,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:38:02,753 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:38:02,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:38:02,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1321252784, now seen corresponding path program 31 times [2023-08-30 18:38:02,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:38:02,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904340500] [2023-08-30 18:38:02,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:38:02,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:38:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:38:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:38:03,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:38:03,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904340500] [2023-08-30 18:38:03,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904340500] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:38:03,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675665353] [2023-08-30 18:38:03,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 18:38:03,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:38:03,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:38:03,290 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:38:03,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-30 18:38:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:38:03,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 18:38:03,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:38:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:38:03,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:38:04,053 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:38:04,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:38:04,058 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-30 18:38:04,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-30 18:38:04,093 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-30 18:38:04,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-30 18:38:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:38:04,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675665353] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:38:04,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:38:04,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2023-08-30 18:38:04,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557066754] [2023-08-30 18:38:04,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:38:04,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-30 18:38:04,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:38:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-30 18:38:04,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2023-08-30 18:38:08,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-08-30 18:38:08,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 2481 transitions, 66167 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) [2023-08-30 18:38:08,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:38:08,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-08-30 18:38:08,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:38:24,571 INFO L130 PetriNetUnfolder]: 10720/19586 cut-off events. [2023-08-30 18:38:24,571 INFO L131 PetriNetUnfolder]: For 4466646/4466646 co-relation queries the response was YES. [2023-08-30 18:38:24,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341664 conditions, 19586 events. 10720/19586 cut-off events. For 4466646/4466646 co-relation queries the response was YES. Maximal size of possible extension queue 1145. Compared 167822 event pairs, 1941 based on Foata normal form. 4/19590 useless extension candidates. Maximal degree in co-relation 341420. Up to 19217 conditions per place. [2023-08-30 18:38:24,990 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 2357 selfloop transitions, 140 changer transitions 3/2500 dead transitions. [2023-08-30 18:38:24,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 2500 transitions, 71752 flow [2023-08-30 18:38:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:38:24,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:38:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2538 transitions. [2023-08-30 18:38:24,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3560606060606061 [2023-08-30 18:38:24,993 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2538 transitions. [2023-08-30 18:38:24,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2538 transitions. [2023-08-30 18:38:24,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:38:24,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2538 transitions. [2023-08-30 18:38:24,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 115.36363636363636) internal successors, (2538), 22 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:38:24,997 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) [2023-08-30 18:38:24,997 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) [2023-08-30 18:38:24,997 INFO L175 Difference]: Start difference. First operand has 642 places, 2481 transitions, 66167 flow. Second operand 22 states and 2538 transitions. [2023-08-30 18:38:24,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 2500 transitions, 71752 flow Killed by 15