./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/popl20-figure1-alt.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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:38:54,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:38:54,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:38:54,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:38:54,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:38:54,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:38:54,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:38:54,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:38:54,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:38:54,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:38:54,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:38:54,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:38:54,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:38:54,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:38:54,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:38:54,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:38:54,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:38:54,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:38:54,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:38:54,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:38:54,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:38:54,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:38:54,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:38:54,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:38:54,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:38:54,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:38:54,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:38:54,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:38:54,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:38:54,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:38:54,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:38:54,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:38:54,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:38:54,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:38:54,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:38:54,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:38:54,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:38:54,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:38:54,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:38:54,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:38:54,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:38:54,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:38:54,545 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:38:54,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:38:54,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:38:54,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:38:54,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:38:54,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:38:54,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:38:54,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:38:54,548 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:38:54,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:38:54,549 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:38:54,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:38:54,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:38:54,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:38:54,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:38:54,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:38:54,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:38:54,550 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:38:54,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:38:54,550 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:38:54,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:38:54,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:38:54,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:38:54,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:38:54,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:38:54,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:38:54,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:38:54,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:38:54,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:38:54,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:38:54,552 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:38:54,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:38:54,552 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:38:54,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:38:54,553 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:38:54,553 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:38:54,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:38:54,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:38:54,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:38:54,825 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:38:54,825 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:38:54,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-31 02:38:55,755 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:38:55,897 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:38:55,898 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-31 02:38:55,904 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/038026dcc/d44f8d93aea94dfab484581c5fe0f376/FLAG5f0d15943 [2023-08-31 02:38:55,933 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/038026dcc/d44f8d93aea94dfab484581c5fe0f376 [2023-08-31 02:38:55,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:38:55,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:38:55,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:38:55,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:38:55,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:38:55,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:38:55" (1/1) ... [2023-08-31 02:38:55,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c219079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:55, skipping insertion in model container [2023-08-31 02:38:55,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:38:55" (1/1) ... [2023-08-31 02:38:55,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:38:55,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:38:56,091 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/popl20-figure1-alt.wvr.c[2087,2100] [2023-08-31 02:38:56,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:38:56,102 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:38:56,121 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/popl20-figure1-alt.wvr.c[2087,2100] [2023-08-31 02:38:56,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:38:56,131 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:38:56,131 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:38:56,135 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:38:56,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56 WrapperNode [2023-08-31 02:38:56,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:38:56,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:38:56,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:38:56,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:38:56,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (1/1) ... [2023-08-31 02:38:56,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (1/1) ... [2023-08-31 02:38:56,166 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2023-08-31 02:38:56,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:38:56,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:38:56,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:38:56,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:38:56,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (1/1) ... [2023-08-31 02:38:56,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (1/1) ... [2023-08-31 02:38:56,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (1/1) ... [2023-08-31 02:38:56,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (1/1) ... [2023-08-31 02:38:56,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (1/1) ... [2023-08-31 02:38:56,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (1/1) ... [2023-08-31 02:38:56,194 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (1/1) ... [2023-08-31 02:38:56,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (1/1) ... [2023-08-31 02:38:56,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:38:56,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:38:56,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:38:56,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:38:56,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (1/1) ... [2023-08-31 02:38:56,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:38:56,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:38:56,220 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) [2023-08-31 02:38:56,223 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 [2023-08-31 02:38:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:38:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:38:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:38:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:38:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:38:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:38:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:38:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:38:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:38:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:38:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:38:56,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:38:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:38:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:38:56,249 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:38:56,335 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:38:56,337 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:38:56,497 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:38:56,523 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:38:56,524 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 02:38:56,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:38:56 BoogieIcfgContainer [2023-08-31 02:38:56,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:38:56,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:38:56,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:38:56,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:38:56,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:38:55" (1/3) ... [2023-08-31 02:38:56,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a15191e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:38:56, skipping insertion in model container [2023-08-31 02:38:56,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:38:56" (2/3) ... [2023-08-31 02:38:56,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a15191e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:38:56, skipping insertion in model container [2023-08-31 02:38:56,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:38:56" (3/3) ... [2023-08-31 02:38:56,544 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-08-31 02:38:56,549 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:38:56,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:38:56,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:38:56,571 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:38:56,629 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 02:38:56,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2023-08-31 02:38:56,708 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2023-08-31 02:38:56,709 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:38:56,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-31 02:38:56,714 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2023-08-31 02:38:56,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 160 flow [2023-08-31 02:38:56,722 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:38:56,731 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 160 flow [2023-08-31 02:38:56,736 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 160 flow [2023-08-31 02:38:56,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 160 flow [2023-08-31 02:38:56,771 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2023-08-31 02:38:56,771 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:38:56,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-31 02:38:56,773 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-08-31 02:38:58,529 INFO L134 LiptonReduction]: Checked pairs total: 559 [2023-08-31 02:38:58,529 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-08-31 02:38:58,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:38:58,552 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;@61e6ac81, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:38:58,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 02:38:58,561 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 02:38:58,561 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:38:58,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:38:58,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:38:58,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:38:58,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:38:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash -463799749, now seen corresponding path program 1 times [2023-08-31 02:38:58,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:38:58,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208879337] [2023-08-31 02:38:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:38:58,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:38:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:38:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:38:59,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:38:59,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208879337] [2023-08-31 02:38:59,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208879337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:38:59,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:38:59,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:38:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782222009] [2023-08-31 02:38:59,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:38:59,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:38:59,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:38:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:38:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:38:59,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-31 02:38:59,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:38:59,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:38:59,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-31 02:38:59,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:38:59,437 INFO L130 PetriNetUnfolder]: 62/126 cut-off events. [2023-08-31 02:38:59,437 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-31 02:38:59,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 126 events. 62/126 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 14 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 200. Up to 63 conditions per place. [2023-08-31 02:38:59,440 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 32 selfloop transitions, 8 changer transitions 5/45 dead transitions. [2023-08-31 02:38:59,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 45 transitions, 213 flow [2023-08-31 02:38:59,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:38:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:38:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 488 transitions. [2023-08-31 02:38:59,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45864661654135336 [2023-08-31 02:38:59,456 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 488 transitions. [2023-08-31 02:38:59,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 488 transitions. [2023-08-31 02:38:59,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:38:59,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 488 transitions. [2023-08-31 02:38:59,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:38:59,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:38:59,469 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:38:59,470 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 488 transitions. [2023-08-31 02:38:59,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 45 transitions, 213 flow [2023-08-31 02:38:59,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 45 transitions, 191 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 02:38:59,474 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 89 flow [2023-08-31 02:38:59,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=89, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-08-31 02:38:59,477 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-31 02:38:59,477 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 89 flow [2023-08-31 02:38:59,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:38:59,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:38:59,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:38:59,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:38:59,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:38:59,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:38:59,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1560515861, now seen corresponding path program 2 times [2023-08-31 02:38:59,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:38:59,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254468623] [2023-08-31 02:38:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:38:59,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:38:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:38:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:38:59,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:38:59,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254468623] [2023-08-31 02:38:59,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254468623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:38:59,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:38:59,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:38:59,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885399889] [2023-08-31 02:38:59,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:38:59,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:38:59,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:38:59,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:38:59,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:38:59,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-31 02:38:59,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:38:59,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:38:59,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-31 02:38:59,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:38:59,879 INFO L130 PetriNetUnfolder]: 63/131 cut-off events. [2023-08-31 02:38:59,879 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-31 02:38:59,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 131 events. 63/131 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 408 event pairs, 10 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 377. Up to 63 conditions per place. [2023-08-31 02:38:59,881 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 29 selfloop transitions, 8 changer transitions 11/48 dead transitions. [2023-08-31 02:38:59,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 48 transitions, 269 flow [2023-08-31 02:38:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:38:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:38:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2023-08-31 02:38:59,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567669172932331 [2023-08-31 02:38:59,883 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2023-08-31 02:38:59,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2023-08-31 02:38:59,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:38:59,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2023-08-31 02:38:59,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:38:59,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:38:59,886 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:38:59,887 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 89 flow. Second operand 7 states and 486 transitions. [2023-08-31 02:38:59,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 48 transitions, 269 flow [2023-08-31 02:38:59,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 48 transitions, 263 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 02:38:59,890 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 121 flow [2023-08-31 02:38:59,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-08-31 02:38:59,891 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-08-31 02:38:59,891 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 121 flow [2023-08-31 02:38:59,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:38:59,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:38:59,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:38:59,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:38:59,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:38:59,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:38:59,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2054408487, now seen corresponding path program 3 times [2023-08-31 02:38:59,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:38:59,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491652214] [2023-08-31 02:38:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:38:59,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:38:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:00,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:00,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491652214] [2023-08-31 02:39:00,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491652214] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:39:00,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:39:00,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:39:00,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946526286] [2023-08-31 02:39:00,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:39:00,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:39:00,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:39:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:39:00,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-31 02:39:00,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:39:00,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:00,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-31 02:39:00,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:00,324 INFO L130 PetriNetUnfolder]: 66/144 cut-off events. [2023-08-31 02:39:00,325 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-08-31 02:39:00,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 144 events. 66/144 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 462 event pairs, 18 based on Foata normal form. 1/139 useless extension candidates. Maximal degree in co-relation 494. Up to 67 conditions per place. [2023-08-31 02:39:00,326 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 33 selfloop transitions, 11 changer transitions 8/52 dead transitions. [2023-08-31 02:39:00,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 337 flow [2023-08-31 02:39:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:39:00,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:39:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 491 transitions. [2023-08-31 02:39:00,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46146616541353386 [2023-08-31 02:39:00,328 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 491 transitions. [2023-08-31 02:39:00,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 491 transitions. [2023-08-31 02:39:00,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:00,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 491 transitions. [2023-08-31 02:39:00,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:00,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:00,331 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:00,332 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 121 flow. Second operand 7 states and 491 transitions. [2023-08-31 02:39:00,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 337 flow [2023-08-31 02:39:00,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 304 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-31 02:39:00,334 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 165 flow [2023-08-31 02:39:00,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-31 02:39:00,334 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2023-08-31 02:39:00,335 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 165 flow [2023-08-31 02:39:00,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:39:00,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:00,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:00,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 02:39:00,336 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:00,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:00,336 INFO L85 PathProgramCache]: Analyzing trace with hash 485360883, now seen corresponding path program 4 times [2023-08-31 02:39:00,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:00,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46934027] [2023-08-31 02:39:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:00,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:00,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:00,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46934027] [2023-08-31 02:39:00,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46934027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:39:00,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:39:00,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:39:00,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917026648] [2023-08-31 02:39:00,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:39:00,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:39:00,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:00,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:39:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:39:00,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-31 02:39:00,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 165 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:39:00,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:00,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-31 02:39:00,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:00,644 INFO L130 PetriNetUnfolder]: 64/142 cut-off events. [2023-08-31 02:39:00,644 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-08-31 02:39:00,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 142 events. 64/142 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 464 event pairs, 12 based on Foata normal form. 1/137 useless extension candidates. Maximal degree in co-relation 506. Up to 67 conditions per place. [2023-08-31 02:39:00,648 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 36 selfloop transitions, 12 changer transitions 5/53 dead transitions. [2023-08-31 02:39:00,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 367 flow [2023-08-31 02:39:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:39:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:39:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 490 transitions. [2023-08-31 02:39:00,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2023-08-31 02:39:00,652 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 490 transitions. [2023-08-31 02:39:00,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 490 transitions. [2023-08-31 02:39:00,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:00,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 490 transitions. [2023-08-31 02:39:00,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:00,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:00,656 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:00,656 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 165 flow. Second operand 7 states and 490 transitions. [2023-08-31 02:39:00,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 367 flow [2023-08-31 02:39:00,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 350 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 02:39:00,658 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 216 flow [2023-08-31 02:39:00,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-08-31 02:39:00,659 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-08-31 02:39:00,659 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 216 flow [2023-08-31 02:39:00,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:39:00,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:00,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:00,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 02:39:00,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:00,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:00,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2091229915, now seen corresponding path program 5 times [2023-08-31 02:39:00,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:00,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841638316] [2023-08-31 02:39:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:00,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:00,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:00,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841638316] [2023-08-31 02:39:00,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841638316] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:39:00,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:39:00,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:39:00,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940133893] [2023-08-31 02:39:00,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:39:00,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:39:00,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:00,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:39:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:39:00,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-31 02:39:00,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 216 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:39:00,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:00,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-31 02:39:00,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:00,976 INFO L130 PetriNetUnfolder]: 63/135 cut-off events. [2023-08-31 02:39:00,976 INFO L131 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2023-08-31 02:39:00,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 135 events. 63/135 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 421 event pairs, 12 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 536. Up to 67 conditions per place. [2023-08-31 02:39:00,977 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 29 selfloop transitions, 11 changer transitions 9/49 dead transitions. [2023-08-31 02:39:00,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 383 flow [2023-08-31 02:39:00,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:39:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:39:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 485 transitions. [2023-08-31 02:39:00,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558270676691729 [2023-08-31 02:39:00,979 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 485 transitions. [2023-08-31 02:39:00,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 485 transitions. [2023-08-31 02:39:00,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:00,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 485 transitions. [2023-08-31 02:39:00,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.28571428571429) internal successors, (485), 7 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:00,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:00,982 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:00,982 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 216 flow. Second operand 7 states and 485 transitions. [2023-08-31 02:39:00,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 383 flow [2023-08-31 02:39:00,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 364 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-31 02:39:00,984 INFO L231 Difference]: Finished difference. Result has 50 places, 29 transitions, 232 flow [2023-08-31 02:39:00,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=50, PETRI_TRANSITIONS=29} [2023-08-31 02:39:00,984 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-08-31 02:39:00,985 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 29 transitions, 232 flow [2023-08-31 02:39:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:39:00,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:00,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:00,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 02:39:00,985 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:00,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2082114117, now seen corresponding path program 6 times [2023-08-31 02:39:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:00,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847493814] [2023-08-31 02:39:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:01,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:01,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847493814] [2023-08-31 02:39:01,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847493814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:39:01,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:39:01,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:39:01,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882359507] [2023-08-31 02:39:01,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:39:01,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:39:01,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:01,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:39:01,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:39:01,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 152 [2023-08-31 02:39:01,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 29 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:39:01,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:01,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 152 [2023-08-31 02:39:01,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:01,266 INFO L130 PetriNetUnfolder]: 59/121 cut-off events. [2023-08-31 02:39:01,266 INFO L131 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2023-08-31 02:39:01,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 121 events. 59/121 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 338 event pairs, 14 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 500. Up to 67 conditions per place. [2023-08-31 02:39:01,267 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 22 selfloop transitions, 11 changer transitions 12/45 dead transitions. [2023-08-31 02:39:01,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 379 flow [2023-08-31 02:39:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:39:01,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:39:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 481 transitions. [2023-08-31 02:39:01,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45206766917293234 [2023-08-31 02:39:01,269 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 481 transitions. [2023-08-31 02:39:01,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 481 transitions. [2023-08-31 02:39:01,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:01,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 481 transitions. [2023-08-31 02:39:01,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:01,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:01,272 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:01,272 INFO L175 Difference]: Start difference. First operand has 50 places, 29 transitions, 232 flow. Second operand 7 states and 481 transitions. [2023-08-31 02:39:01,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 379 flow [2023-08-31 02:39:01,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 345 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-31 02:39:01,274 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 214 flow [2023-08-31 02:39:01,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-08-31 02:39:01,277 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-08-31 02:39:01,277 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 214 flow [2023-08-31 02:39:01,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 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) [2023-08-31 02:39:01,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:01,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 02:39:01,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:01,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2107689934, now seen corresponding path program 1 times [2023-08-31 02:39:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:01,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969089346] [2023-08-31 02:39:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:01,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:01,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:01,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969089346] [2023-08-31 02:39:01,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969089346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:01,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659902541] [2023-08-31 02:39:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:01,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:01,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:01,436 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) [2023-08-31 02:39:01,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:39:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:01,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 02:39:01,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:01,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:01,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659902541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:01,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:01,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-31 02:39:01,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259823922] [2023-08-31 02:39:01,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:01,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:39:01,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:39:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:39:01,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:01,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 214 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:01,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:01,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:01,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:02,509 INFO L130 PetriNetUnfolder]: 144/300 cut-off events. [2023-08-31 02:39:02,509 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-08-31 02:39:02,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 300 events. 144/300 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1256 event pairs, 4 based on Foata normal form. 3/269 useless extension candidates. Maximal degree in co-relation 911. Up to 89 conditions per place. [2023-08-31 02:39:02,511 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 70 selfloop transitions, 27 changer transitions 25/122 dead transitions. [2023-08-31 02:39:02,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 122 transitions, 742 flow [2023-08-31 02:39:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 02:39:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 02:39:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1259 transitions. [2023-08-31 02:39:02,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359418282548476 [2023-08-31 02:39:02,514 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1259 transitions. [2023-08-31 02:39:02,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1259 transitions. [2023-08-31 02:39:02,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:02,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1259 transitions. [2023-08-31 02:39:02,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.26315789473684) internal successors, (1259), 19 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:02,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:02,519 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:02,519 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 214 flow. Second operand 19 states and 1259 transitions. [2023-08-31 02:39:02,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 122 transitions, 742 flow [2023-08-31 02:39:02,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 122 transitions, 688 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-08-31 02:39:02,523 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 317 flow [2023-08-31 02:39:02,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=317, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-08-31 02:39:02,523 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2023-08-31 02:39:02,523 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 317 flow [2023-08-31 02:39:02,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:02,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:02,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:02,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 02:39:02,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:02,729 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:02,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:02,730 INFO L85 PathProgramCache]: Analyzing trace with hash -635034376, now seen corresponding path program 2 times [2023-08-31 02:39:02,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:02,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565798574] [2023-08-31 02:39:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:02,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:02,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:02,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565798574] [2023-08-31 02:39:02,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565798574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:02,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874237900] [2023-08-31 02:39:02,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:39:02,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:02,885 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) [2023-08-31 02:39:02,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:39:02,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:39:02,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:02,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 02:39:02,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:03,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:03,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874237900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:03,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:03,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-31 02:39:03,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911700677] [2023-08-31 02:39:03,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:03,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:39:03,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:39:03,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:39:03,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:03,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 317 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:03,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:03,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:03,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:04,286 INFO L130 PetriNetUnfolder]: 189/426 cut-off events. [2023-08-31 02:39:04,286 INFO L131 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2023-08-31 02:39:04,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 426 events. 189/426 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2146 event pairs, 10 based on Foata normal form. 4/430 useless extension candidates. Maximal degree in co-relation 1603. Up to 123 conditions per place. [2023-08-31 02:39:04,288 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 107 selfloop transitions, 53 changer transitions 20/180 dead transitions. [2023-08-31 02:39:04,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 180 transitions, 1262 flow [2023-08-31 02:39:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 02:39:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 02:39:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2033 transitions. [2023-08-31 02:39:04,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2023-08-31 02:39:04,294 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2033 transitions. [2023-08-31 02:39:04,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2033 transitions. [2023-08-31 02:39:04,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:04,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2033 transitions. [2023-08-31 02:39:04,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 65.58064516129032) internal successors, (2033), 31 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:04,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:04,303 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:04,303 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 317 flow. Second operand 31 states and 2033 transitions. [2023-08-31 02:39:04,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 180 transitions, 1262 flow [2023-08-31 02:39:04,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 180 transitions, 1092 flow, removed 76 selfloop flow, removed 7 redundant places. [2023-08-31 02:39:04,309 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 586 flow [2023-08-31 02:39:04,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=586, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2023-08-31 02:39:04,311 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-08-31 02:39:04,311 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 586 flow [2023-08-31 02:39:04,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:04,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:04,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:04,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 02:39:04,516 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,SelfDestructingSolverStorable7 [2023-08-31 02:39:04,517 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:04,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:04,517 INFO L85 PathProgramCache]: Analyzing trace with hash -708723856, now seen corresponding path program 3 times [2023-08-31 02:39:04,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:04,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39683862] [2023-08-31 02:39:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:04,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:04,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:04,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39683862] [2023-08-31 02:39:04,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39683862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:04,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575470120] [2023-08-31 02:39:04,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:39:04,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:04,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:04,642 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) [2023-08-31 02:39:04,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:39:04,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:39:04,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:04,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 02:39:04,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:04,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:05,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575470120] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:05,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:05,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-31 02:39:05,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174989862] [2023-08-31 02:39:05,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:05,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:39:05,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:05,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:39:05,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:39:05,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:05,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 586 flow. Second operand has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:05,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:05,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:05,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:05,949 INFO L130 PetriNetUnfolder]: 185/397 cut-off events. [2023-08-31 02:39:05,949 INFO L131 PetriNetUnfolder]: For 1780/1780 co-relation queries the response was YES. [2023-08-31 02:39:05,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1839 conditions, 397 events. 185/397 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1877 event pairs, 6 based on Foata normal form. 5/402 useless extension candidates. Maximal degree in co-relation 1807. Up to 119 conditions per place. [2023-08-31 02:39:05,952 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 82 selfloop transitions, 43 changer transitions 33/158 dead transitions. [2023-08-31 02:39:05,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1256 flow [2023-08-31 02:39:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 02:39:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 02:39:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1709 transitions. [2023-08-31 02:39:05,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4324392712550607 [2023-08-31 02:39:05,956 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1709 transitions. [2023-08-31 02:39:05,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1709 transitions. [2023-08-31 02:39:05,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:05,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1709 transitions. [2023-08-31 02:39:05,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.73076923076923) internal successors, (1709), 26 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:05,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 152.0) internal successors, (4104), 27 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:05,963 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 152.0) internal successors, (4104), 27 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:05,963 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 586 flow. Second operand 26 states and 1709 transitions. [2023-08-31 02:39:05,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1256 flow [2023-08-31 02:39:05,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 158 transitions, 1137 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-08-31 02:39:05,970 INFO L231 Difference]: Finished difference. Result has 109 places, 66 transitions, 564 flow [2023-08-31 02:39:05,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=564, PETRI_PLACES=109, PETRI_TRANSITIONS=66} [2023-08-31 02:39:05,970 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 89 predicate places. [2023-08-31 02:39:05,971 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 66 transitions, 564 flow [2023-08-31 02:39:05,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:05,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:05,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:05,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:06,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:06,177 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:06,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:06,177 INFO L85 PathProgramCache]: Analyzing trace with hash -2082814152, now seen corresponding path program 4 times [2023-08-31 02:39:06,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:06,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407591417] [2023-08-31 02:39:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:06,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:06,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407591417] [2023-08-31 02:39:06,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407591417] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67032455] [2023-08-31 02:39:06,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:39:06,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:06,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:06,321 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) [2023-08-31 02:39:06,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:39:06,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:39:06,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:06,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 02:39:06,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:06,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:06,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67032455] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:06,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:06,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-31 02:39:06,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545211176] [2023-08-31 02:39:06,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:06,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:39:06,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:06,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:39:06,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:39:06,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:06,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 66 transitions, 564 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:06,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:06,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:06,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:07,032 INFO L130 PetriNetUnfolder]: 168/351 cut-off events. [2023-08-31 02:39:07,032 INFO L131 PetriNetUnfolder]: For 1783/1783 co-relation queries the response was YES. [2023-08-31 02:39:07,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1696 conditions, 351 events. 168/351 cut-off events. For 1783/1783 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1516 event pairs, 4 based on Foata normal form. 2/351 useless extension candidates. Maximal degree in co-relation 1659. Up to 155 conditions per place. [2023-08-31 02:39:07,034 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 54 selfloop transitions, 38 changer transitions 10/102 dead transitions. [2023-08-31 02:39:07,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 102 transitions, 918 flow [2023-08-31 02:39:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 02:39:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 02:39:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 851 transitions. [2023-08-31 02:39:07,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430668016194332 [2023-08-31 02:39:07,036 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 851 transitions. [2023-08-31 02:39:07,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 851 transitions. [2023-08-31 02:39:07,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:07,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 851 transitions. [2023-08-31 02:39:07,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.46153846153847) internal successors, (851), 13 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:07,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:07,040 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:07,040 INFO L175 Difference]: Start difference. First operand has 109 places, 66 transitions, 564 flow. Second operand 13 states and 851 transitions. [2023-08-31 02:39:07,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 102 transitions, 918 flow [2023-08-31 02:39:07,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 102 transitions, 801 flow, removed 16 selfloop flow, removed 19 redundant places. [2023-08-31 02:39:07,045 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 554 flow [2023-08-31 02:39:07,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=554, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2023-08-31 02:39:07,046 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-31 02:39:07,046 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 554 flow [2023-08-31 02:39:07,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:07,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:07,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:07,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 02:39:07,251 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 [2023-08-31 02:39:07,251 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:07,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:07,251 INFO L85 PathProgramCache]: Analyzing trace with hash 992131436, now seen corresponding path program 5 times [2023-08-31 02:39:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:07,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520434225] [2023-08-31 02:39:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:07,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:07,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:07,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520434225] [2023-08-31 02:39:07,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520434225] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:07,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900793538] [2023-08-31 02:39:07,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:39:07,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:07,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:07,374 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) [2023-08-31 02:39:07,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 02:39:07,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:39:07,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:07,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 02:39:07,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:07,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:07,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900793538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:07,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:07,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-31 02:39:07,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296654294] [2023-08-31 02:39:07,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:07,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:39:07,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:39:07,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:39:07,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:07,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 554 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:07,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:07,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:07,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:08,015 INFO L130 PetriNetUnfolder]: 170/357 cut-off events. [2023-08-31 02:39:08,015 INFO L131 PetriNetUnfolder]: For 1289/1289 co-relation queries the response was YES. [2023-08-31 02:39:08,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1617 conditions, 357 events. 170/357 cut-off events. For 1289/1289 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1548 event pairs, 5 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 1584. Up to 195 conditions per place. [2023-08-31 02:39:08,018 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 60 selfloop transitions, 27 changer transitions 10/97 dead transitions. [2023-08-31 02:39:08,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 866 flow [2023-08-31 02:39:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:39:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:39:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 715 transitions. [2023-08-31 02:39:08,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276315789473684 [2023-08-31 02:39:08,019 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 715 transitions. [2023-08-31 02:39:08,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 715 transitions. [2023-08-31 02:39:08,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:08,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 715 transitions. [2023-08-31 02:39:08,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.0) internal successors, (715), 11 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:08,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:08,022 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:08,022 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 554 flow. Second operand 11 states and 715 transitions. [2023-08-31 02:39:08,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 866 flow [2023-08-31 02:39:08,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 97 transitions, 771 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-08-31 02:39:08,027 INFO L231 Difference]: Finished difference. Result has 92 places, 70 transitions, 546 flow [2023-08-31 02:39:08,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=546, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2023-08-31 02:39:08,027 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-31 02:39:08,028 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 546 flow [2023-08-31 02:39:08,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:08,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:08,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:08,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 02:39:08,233 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 [2023-08-31 02:39:08,233 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:08,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:08,233 INFO L85 PathProgramCache]: Analyzing trace with hash 209179710, now seen corresponding path program 6 times [2023-08-31 02:39:08,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:08,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177003487] [2023-08-31 02:39:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:08,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:08,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:08,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177003487] [2023-08-31 02:39:08,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177003487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:08,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549423179] [2023-08-31 02:39:08,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:39:08,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:08,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:08,355 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) [2023-08-31 02:39:08,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 02:39:08,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 02:39:08,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:08,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 02:39:08,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:08,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:08,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549423179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:08,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:08,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-31 02:39:08,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986252592] [2023-08-31 02:39:08,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:08,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:39:08,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:08,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:39:08,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:39:08,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:08,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 546 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:08,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:08,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:08,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:09,502 INFO L130 PetriNetUnfolder]: 208/476 cut-off events. [2023-08-31 02:39:09,502 INFO L131 PetriNetUnfolder]: For 1757/1757 co-relation queries the response was YES. [2023-08-31 02:39:09,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 476 events. 208/476 cut-off events. For 1757/1757 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2487 event pairs, 3 based on Foata normal form. 3/477 useless extension candidates. Maximal degree in co-relation 2063. Up to 240 conditions per place. [2023-08-31 02:39:09,507 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 94 selfloop transitions, 45 changer transitions 16/155 dead transitions. [2023-08-31 02:39:09,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1263 flow [2023-08-31 02:39:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 02:39:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 02:39:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1432 transitions. [2023-08-31 02:39:09,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42822966507177035 [2023-08-31 02:39:09,514 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1432 transitions. [2023-08-31 02:39:09,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1432 transitions. [2023-08-31 02:39:09,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:09,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1432 transitions. [2023-08-31 02:39:09,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.0909090909091) internal successors, (1432), 22 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:09,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:09,522 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:09,522 INFO L175 Difference]: Start difference. First operand has 92 places, 70 transitions, 546 flow. Second operand 22 states and 1432 transitions. [2023-08-31 02:39:09,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1263 flow [2023-08-31 02:39:09,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1212 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-31 02:39:09,529 INFO L231 Difference]: Finished difference. Result has 110 places, 91 transitions, 874 flow [2023-08-31 02:39:09,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=874, PETRI_PLACES=110, PETRI_TRANSITIONS=91} [2023-08-31 02:39:09,530 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 90 predicate places. [2023-08-31 02:39:09,530 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 91 transitions, 874 flow [2023-08-31 02:39:09,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:09,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:09,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:09,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:09,735 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 [2023-08-31 02:39:09,736 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:09,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash 135490230, now seen corresponding path program 7 times [2023-08-31 02:39:09,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:09,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066870077] [2023-08-31 02:39:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:09,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:09,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:09,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066870077] [2023-08-31 02:39:09,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066870077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:09,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912321438] [2023-08-31 02:39:09,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:39:09,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:09,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:09,852 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) [2023-08-31 02:39:09,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 02:39:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:09,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 02:39:09,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:10,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:10,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912321438] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:10,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:10,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-31 02:39:10,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802078152] [2023-08-31 02:39:10,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:10,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:39:10,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:10,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:39:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:39:10,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:10,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 91 transitions, 874 flow. Second operand has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:10,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:10,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:10,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:10,919 INFO L130 PetriNetUnfolder]: 203/442 cut-off events. [2023-08-31 02:39:10,919 INFO L131 PetriNetUnfolder]: For 2236/2236 co-relation queries the response was YES. [2023-08-31 02:39:10,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2237 conditions, 442 events. 203/442 cut-off events. For 2236/2236 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2193 event pairs, 3 based on Foata normal form. 4/444 useless extension candidates. Maximal degree in co-relation 2196. Up to 236 conditions per place. [2023-08-31 02:39:10,922 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 71 selfloop transitions, 38 changer transitions 28/137 dead transitions. [2023-08-31 02:39:10,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1289 flow [2023-08-31 02:39:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 02:39:10,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 02:39:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1233 transitions. [2023-08-31 02:39:10,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42693905817174516 [2023-08-31 02:39:10,924 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1233 transitions. [2023-08-31 02:39:10,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1233 transitions. [2023-08-31 02:39:10,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:10,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1233 transitions. [2023-08-31 02:39:10,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:10,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:10,939 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:10,939 INFO L175 Difference]: Start difference. First operand has 110 places, 91 transitions, 874 flow. Second operand 19 states and 1233 transitions. [2023-08-31 02:39:10,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1289 flow [2023-08-31 02:39:10,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 1113 flow, removed 70 selfloop flow, removed 8 redundant places. [2023-08-31 02:39:10,952 INFO L231 Difference]: Finished difference. Result has 122 places, 87 transitions, 782 flow [2023-08-31 02:39:10,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=782, PETRI_PLACES=122, PETRI_TRANSITIONS=87} [2023-08-31 02:39:10,953 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2023-08-31 02:39:10,953 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 87 transitions, 782 flow [2023-08-31 02:39:10,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.10526315789474) internal successors, (1180), 19 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:10,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:10,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:10,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:11,162 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 [2023-08-31 02:39:11,163 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:11,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:11,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1069243532, now seen corresponding path program 8 times [2023-08-31 02:39:11,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:11,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101874596] [2023-08-31 02:39:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:11,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:11,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101874596] [2023-08-31 02:39:11,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101874596] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:11,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784654541] [2023-08-31 02:39:11,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:39:11,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:11,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:11,272 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) [2023-08-31 02:39:11,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 02:39:11,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:39:11,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:11,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 02:39:11,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:11,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:11,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784654541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:11,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:11,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-31 02:39:11,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36528443] [2023-08-31 02:39:11,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:11,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:39:11,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:11,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:39:11,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:39:11,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:11,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 87 transitions, 782 flow. Second operand has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:11,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:11,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:11,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:12,001 INFO L130 PetriNetUnfolder]: 188/399 cut-off events. [2023-08-31 02:39:12,001 INFO L131 PetriNetUnfolder]: For 1561/1561 co-relation queries the response was YES. [2023-08-31 02:39:12,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 399 events. 188/399 cut-off events. For 1561/1561 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1837 event pairs, 9 based on Foata normal form. 2/399 useless extension candidates. Maximal degree in co-relation 1896. Up to 214 conditions per place. [2023-08-31 02:39:12,004 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 71 selfloop transitions, 33 changer transitions 11/115 dead transitions. [2023-08-31 02:39:12,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 1141 flow [2023-08-31 02:39:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 02:39:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 02:39:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 781 transitions. [2023-08-31 02:39:12,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281798245614035 [2023-08-31 02:39:12,007 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 781 transitions. [2023-08-31 02:39:12,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 781 transitions. [2023-08-31 02:39:12,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:12,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 781 transitions. [2023-08-31 02:39:12,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 65.08333333333333) internal successors, (781), 12 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:12,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:12,011 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:12,011 INFO L175 Difference]: Start difference. First operand has 122 places, 87 transitions, 782 flow. Second operand 12 states and 781 transitions. [2023-08-31 02:39:12,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 1141 flow [2023-08-31 02:39:12,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 115 transitions, 1022 flow, removed 10 selfloop flow, removed 14 redundant places. [2023-08-31 02:39:12,018 INFO L231 Difference]: Finished difference. Result has 105 places, 87 transitions, 746 flow [2023-08-31 02:39:12,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=746, PETRI_PLACES=105, PETRI_TRANSITIONS=87} [2023-08-31 02:39:12,019 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-08-31 02:39:12,019 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 87 transitions, 746 flow [2023-08-31 02:39:12,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.0) internal successors, (1178), 19 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) [2023-08-31 02:39:12,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:12,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:12,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:12,224 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 [2023-08-31 02:39:12,224 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:12,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1595484335, now seen corresponding path program 9 times [2023-08-31 02:39:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:12,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285584143] [2023-08-31 02:39:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:12,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:12,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285584143] [2023-08-31 02:39:12,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285584143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:12,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125690535] [2023-08-31 02:39:12,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:39:12,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:12,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:12,366 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) [2023-08-31 02:39:12,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 02:39:12,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:39:12,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:12,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 02:39:12,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:12,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:12,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125690535] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:12,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:12,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-31 02:39:12,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500980354] [2023-08-31 02:39:12,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:12,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 02:39:12,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:12,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 02:39:12,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-08-31 02:39:12,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:12,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 87 transitions, 746 flow. Second operand has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:12,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:12,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:12,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:14,128 INFO L130 PetriNetUnfolder]: 298/649 cut-off events. [2023-08-31 02:39:14,128 INFO L131 PetriNetUnfolder]: For 2333/2333 co-relation queries the response was YES. [2023-08-31 02:39:14,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 649 events. 298/649 cut-off events. For 2333/2333 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3532 event pairs, 2 based on Foata normal form. 6/651 useless extension candidates. Maximal degree in co-relation 2820. Up to 182 conditions per place. [2023-08-31 02:39:14,132 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 145 selfloop transitions, 94 changer transitions 31/270 dead transitions. [2023-08-31 02:39:14,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 270 transitions, 2195 flow [2023-08-31 02:39:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-31 02:39:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-31 02:39:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2501 transitions. [2023-08-31 02:39:14,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43299861495844877 [2023-08-31 02:39:14,136 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2501 transitions. [2023-08-31 02:39:14,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2501 transitions. [2023-08-31 02:39:14,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:14,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2501 transitions. [2023-08-31 02:39:14,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 65.8157894736842) internal successors, (2501), 38 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:14,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 152.0) internal successors, (5928), 39 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:14,144 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 152.0) internal successors, (5928), 39 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:14,144 INFO L175 Difference]: Start difference. First operand has 105 places, 87 transitions, 746 flow. Second operand 38 states and 2501 transitions. [2023-08-31 02:39:14,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 270 transitions, 2195 flow [2023-08-31 02:39:14,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 270 transitions, 2085 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-08-31 02:39:14,153 INFO L231 Difference]: Finished difference. Result has 139 places, 141 transitions, 1449 flow [2023-08-31 02:39:14,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1449, PETRI_PLACES=139, PETRI_TRANSITIONS=141} [2023-08-31 02:39:14,154 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-08-31 02:39:14,154 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 141 transitions, 1449 flow [2023-08-31 02:39:14,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:14,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:14,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:14,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:14,361 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 [2023-08-31 02:39:14,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:14,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:14,362 INFO L85 PathProgramCache]: Analyzing trace with hash -749756410, now seen corresponding path program 1 times [2023-08-31 02:39:14,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:14,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455886177] [2023-08-31 02:39:14,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:14,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:14,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:14,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455886177] [2023-08-31 02:39:14,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455886177] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:14,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89718856] [2023-08-31 02:39:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:14,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:14,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:14,473 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) [2023-08-31 02:39:14,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 02:39:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:14,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 02:39:14,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:14,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:14,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89718856] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:14,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:14,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 02:39:14,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875333921] [2023-08-31 02:39:14,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:14,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 02:39:14,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:14,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 02:39:14,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-31 02:39:14,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:14,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 141 transitions, 1449 flow. Second operand has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:14,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:14,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:14,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:15,388 INFO L130 PetriNetUnfolder]: 427/905 cut-off events. [2023-08-31 02:39:15,388 INFO L131 PetriNetUnfolder]: For 4514/4514 co-relation queries the response was YES. [2023-08-31 02:39:15,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4653 conditions, 905 events. 427/905 cut-off events. For 4514/4514 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5277 event pairs, 10 based on Foata normal form. 5/908 useless extension candidates. Maximal degree in co-relation 4436. Up to 237 conditions per place. [2023-08-31 02:39:15,395 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 164 selfloop transitions, 68 changer transitions 17/249 dead transitions. [2023-08-31 02:39:15,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 249 transitions, 2712 flow [2023-08-31 02:39:15,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 02:39:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 02:39:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1139 transitions. [2023-08-31 02:39:15,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407894736842105 [2023-08-31 02:39:15,397 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1139 transitions. [2023-08-31 02:39:15,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1139 transitions. [2023-08-31 02:39:15,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:15,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1139 transitions. [2023-08-31 02:39:15,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.0) internal successors, (1139), 17 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:15,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:15,401 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:15,401 INFO L175 Difference]: Start difference. First operand has 139 places, 141 transitions, 1449 flow. Second operand 17 states and 1139 transitions. [2023-08-31 02:39:15,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 249 transitions, 2712 flow [2023-08-31 02:39:15,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 249 transitions, 2279 flow, removed 191 selfloop flow, removed 15 redundant places. [2023-08-31 02:39:15,422 INFO L231 Difference]: Finished difference. Result has 141 places, 156 transitions, 1585 flow [2023-08-31 02:39:15,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1585, PETRI_PLACES=141, PETRI_TRANSITIONS=156} [2023-08-31 02:39:15,422 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2023-08-31 02:39:15,422 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 156 transitions, 1585 flow [2023-08-31 02:39:15,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:15,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:15,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:15,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:15,630 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 [2023-08-31 02:39:15,631 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:15,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:15,631 INFO L85 PathProgramCache]: Analyzing trace with hash 976032698, now seen corresponding path program 2 times [2023-08-31 02:39:15,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:15,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122706096] [2023-08-31 02:39:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:15,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:15,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:15,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122706096] [2023-08-31 02:39:15,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122706096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:15,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416068853] [2023-08-31 02:39:15,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:39:15,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:15,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:15,739 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) [2023-08-31 02:39:15,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 02:39:15,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:39:15,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 02:39:15,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:15,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:15,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416068853] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:15,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:15,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 02:39:15,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104392614] [2023-08-31 02:39:15,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:15,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 02:39:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 02:39:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-31 02:39:16,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:16,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 156 transitions, 1585 flow. Second operand has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:16,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:16,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:16,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:16,567 INFO L130 PetriNetUnfolder]: 411/855 cut-off events. [2023-08-31 02:39:16,567 INFO L131 PetriNetUnfolder]: For 3772/3772 co-relation queries the response was YES. [2023-08-31 02:39:16,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4270 conditions, 855 events. 411/855 cut-off events. For 3772/3772 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4799 event pairs, 10 based on Foata normal form. 5/860 useless extension candidates. Maximal degree in co-relation 4149. Up to 217 conditions per place. [2023-08-31 02:39:16,572 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 139 selfloop transitions, 60 changer transitions 40/239 dead transitions. [2023-08-31 02:39:16,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 239 transitions, 2513 flow [2023-08-31 02:39:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 02:39:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 02:39:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1251 transitions. [2023-08-31 02:39:16,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43317174515235457 [2023-08-31 02:39:16,574 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1251 transitions. [2023-08-31 02:39:16,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1251 transitions. [2023-08-31 02:39:16,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:16,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1251 transitions. [2023-08-31 02:39:16,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.84210526315789) internal successors, (1251), 19 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:16,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:16,578 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:16,578 INFO L175 Difference]: Start difference. First operand has 141 places, 156 transitions, 1585 flow. Second operand 19 states and 1251 transitions. [2023-08-31 02:39:16,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 239 transitions, 2513 flow [2023-08-31 02:39:16,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 239 transitions, 2420 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-08-31 02:39:16,596 INFO L231 Difference]: Finished difference. Result has 149 places, 142 transitions, 1473 flow [2023-08-31 02:39:16,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1473, PETRI_PLACES=149, PETRI_TRANSITIONS=142} [2023-08-31 02:39:16,597 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 129 predicate places. [2023-08-31 02:39:16,597 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 142 transitions, 1473 flow [2023-08-31 02:39:16,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:16,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:16,598 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:16,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:16,802 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 [2023-08-31 02:39:16,803 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:16,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1591276241, now seen corresponding path program 10 times [2023-08-31 02:39:16,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:16,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494591237] [2023-08-31 02:39:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:16,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:16,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494591237] [2023-08-31 02:39:16,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494591237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329421240] [2023-08-31 02:39:16,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:39:16,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:16,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:16,922 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) [2023-08-31 02:39:16,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 02:39:16,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:39:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 02:39:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:17,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:17,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329421240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:17,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:17,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-31 02:39:17,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032989264] [2023-08-31 02:39:17,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:17,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 02:39:17,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 02:39:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-31 02:39:17,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:17,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 142 transitions, 1473 flow. Second operand has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:17,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:17,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:17,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:18,589 INFO L130 PetriNetUnfolder]: 334/717 cut-off events. [2023-08-31 02:39:18,589 INFO L131 PetriNetUnfolder]: For 3992/3992 co-relation queries the response was YES. [2023-08-31 02:39:18,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 717 events. 334/717 cut-off events. For 3992/3992 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3975 event pairs, 2 based on Foata normal form. 4/721 useless extension candidates. Maximal degree in co-relation 3542. Up to 274 conditions per place. [2023-08-31 02:39:18,594 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 112 selfloop transitions, 78 changer transitions 24/214 dead transitions. [2023-08-31 02:39:18,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 214 transitions, 2109 flow [2023-08-31 02:39:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 02:39:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 02:39:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1768 transitions. [2023-08-31 02:39:18,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43079922027290446 [2023-08-31 02:39:18,596 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1768 transitions. [2023-08-31 02:39:18,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1768 transitions. [2023-08-31 02:39:18,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:18,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1768 transitions. [2023-08-31 02:39:18,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.48148148148148) internal successors, (1768), 27 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:18,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:18,601 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:18,601 INFO L175 Difference]: Start difference. First operand has 149 places, 142 transitions, 1473 flow. Second operand 27 states and 1768 transitions. [2023-08-31 02:39:18,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 214 transitions, 2109 flow [2023-08-31 02:39:18,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 1933 flow, removed 31 selfloop flow, removed 17 redundant places. [2023-08-31 02:39:18,616 INFO L231 Difference]: Finished difference. Result has 153 places, 137 transitions, 1439 flow [2023-08-31 02:39:18,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1439, PETRI_PLACES=153, PETRI_TRANSITIONS=137} [2023-08-31 02:39:18,616 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-08-31 02:39:18,616 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 137 transitions, 1439 flow [2023-08-31 02:39:18,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:18,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:18,617 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:18,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:18,821 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 [2023-08-31 02:39:18,821 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:18,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:18,822 INFO L85 PathProgramCache]: Analyzing trace with hash 716408728, now seen corresponding path program 11 times [2023-08-31 02:39:18,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:18,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531543468] [2023-08-31 02:39:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:18,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:18,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:18,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531543468] [2023-08-31 02:39:18,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531543468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:18,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308972831] [2023-08-31 02:39:18,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:39:18,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:18,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:18,988 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) [2023-08-31 02:39:18,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 02:39:19,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:39:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:19,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:19,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:19,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:19,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308972831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:19,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:19,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-31 02:39:19,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835994295] [2023-08-31 02:39:19,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:19,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 02:39:19,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:19,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 02:39:19,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-08-31 02:39:19,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:19,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 137 transitions, 1439 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:19,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:19,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:19,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:22,067 INFO L130 PetriNetUnfolder]: 603/1334 cut-off events. [2023-08-31 02:39:22,067 INFO L131 PetriNetUnfolder]: For 8809/8809 co-relation queries the response was YES. [2023-08-31 02:39:22,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7150 conditions, 1334 events. 603/1334 cut-off events. For 8809/8809 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8815 event pairs, 6 based on Foata normal form. 8/1342 useless extension candidates. Maximal degree in co-relation 7085. Up to 373 conditions per place. [2023-08-31 02:39:22,091 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 254 selfloop transitions, 179 changer transitions 41/474 dead transitions. [2023-08-31 02:39:22,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 474 transitions, 4798 flow [2023-08-31 02:39:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-31 02:39:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-31 02:39:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4326 transitions. [2023-08-31 02:39:22,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312200956937799 [2023-08-31 02:39:22,095 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4326 transitions. [2023-08-31 02:39:22,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4326 transitions. [2023-08-31 02:39:22,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:22,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4326 transitions. [2023-08-31 02:39:22,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 65.54545454545455) internal successors, (4326), 66 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:22,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 152.0) internal successors, (10184), 67 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:22,106 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 152.0) internal successors, (10184), 67 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:22,107 INFO L175 Difference]: Start difference. First operand has 153 places, 137 transitions, 1439 flow. Second operand 66 states and 4326 transitions. [2023-08-31 02:39:22,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 474 transitions, 4798 flow [2023-08-31 02:39:22,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 474 transitions, 4165 flow, removed 127 selfloop flow, removed 21 redundant places. [2023-08-31 02:39:22,135 INFO L231 Difference]: Finished difference. Result has 217 places, 243 transitions, 2985 flow [2023-08-31 02:39:22,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2985, PETRI_PLACES=217, PETRI_TRANSITIONS=243} [2023-08-31 02:39:22,136 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-08-31 02:39:22,136 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 243 transitions, 2985 flow [2023-08-31 02:39:22,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:22,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:22,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:22,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-31 02:39:22,341 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 [2023-08-31 02:39:22,342 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:22,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:22,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1336338705, now seen corresponding path program 3 times [2023-08-31 02:39:22,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:22,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583165583] [2023-08-31 02:39:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:22,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:22,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:22,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583165583] [2023-08-31 02:39:22,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583165583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:22,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867431987] [2023-08-31 02:39:22,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:39:22,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:22,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:22,481 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) [2023-08-31 02:39:22,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 02:39:22,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:39:22,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 02:39:22,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:22,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:22,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867431987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:22,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:22,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-08-31 02:39:22,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989172820] [2023-08-31 02:39:22,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:22,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:39:22,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:22,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:39:22,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:39:22,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:22,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 243 transitions, 2985 flow. Second operand has 19 states, 19 states have (on average 61.73684210526316) internal successors, (1173), 19 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:22,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:22,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:22,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:23,437 INFO L130 PetriNetUnfolder]: 625/1370 cut-off events. [2023-08-31 02:39:23,453 INFO L131 PetriNetUnfolder]: For 14056/14056 co-relation queries the response was YES. [2023-08-31 02:39:23,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8302 conditions, 1370 events. 625/1370 cut-off events. For 14056/14056 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9032 event pairs, 24 based on Foata normal form. 10/1376 useless extension candidates. Maximal degree in co-relation 7761. Up to 583 conditions per place. [2023-08-31 02:39:23,462 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 182 selfloop transitions, 83 changer transitions 44/309 dead transitions. [2023-08-31 02:39:23,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 309 transitions, 3955 flow [2023-08-31 02:39:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 02:39:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 02:39:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1125 transitions. [2023-08-31 02:39:23,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537151702786375 [2023-08-31 02:39:23,464 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1125 transitions. [2023-08-31 02:39:23,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1125 transitions. [2023-08-31 02:39:23,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:23,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1125 transitions. [2023-08-31 02:39:23,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.17647058823529) internal successors, (1125), 17 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:23,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:23,468 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:23,468 INFO L175 Difference]: Start difference. First operand has 217 places, 243 transitions, 2985 flow. Second operand 17 states and 1125 transitions. [2023-08-31 02:39:23,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 309 transitions, 3955 flow [2023-08-31 02:39:23,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 309 transitions, 3131 flow, removed 297 selfloop flow, removed 33 redundant places. [2023-08-31 02:39:23,533 INFO L231 Difference]: Finished difference. Result has 198 places, 236 transitions, 2394 flow [2023-08-31 02:39:23,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2394, PETRI_PLACES=198, PETRI_TRANSITIONS=236} [2023-08-31 02:39:23,534 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-08-31 02:39:23,534 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 236 transitions, 2394 flow [2023-08-31 02:39:23,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 61.73684210526316) internal successors, (1173), 19 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:23,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:23,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:23,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:23,739 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 [2023-08-31 02:39:23,740 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:23,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:23,740 INFO L85 PathProgramCache]: Analyzing trace with hash 644016598, now seen corresponding path program 12 times [2023-08-31 02:39:23,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:23,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961019368] [2023-08-31 02:39:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:23,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:23,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:23,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961019368] [2023-08-31 02:39:23,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961019368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:23,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165495399] [2023-08-31 02:39:23,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:39:23,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:23,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:23,886 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) [2023-08-31 02:39:23,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 02:39:23,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:39:23,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:23,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:23,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:24,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:24,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165495399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:24,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:24,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-31 02:39:24,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416375277] [2023-08-31 02:39:24,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:24,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 02:39:24,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:24,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 02:39:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-08-31 02:39:24,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:24,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 236 transitions, 2394 flow. Second operand has 24 states, 24 states have (on average 61.875) internal successors, (1485), 24 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:24,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:24,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:24,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:26,492 INFO L130 PetriNetUnfolder]: 574/1252 cut-off events. [2023-08-31 02:39:26,493 INFO L131 PetriNetUnfolder]: For 10627/10627 co-relation queries the response was YES. [2023-08-31 02:39:26,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 1252 events. 574/1252 cut-off events. For 10627/10627 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8099 event pairs, 6 based on Foata normal form. 9/1257 useless extension candidates. Maximal degree in co-relation 6396. Up to 299 conditions per place. [2023-08-31 02:39:26,504 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 219 selfloop transitions, 154 changer transitions 42/415 dead transitions. [2023-08-31 02:39:26,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 415 transitions, 4204 flow [2023-08-31 02:39:26,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-31 02:39:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-31 02:39:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3418 transitions. [2023-08-31 02:39:26,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4324392712550607 [2023-08-31 02:39:26,508 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3418 transitions. [2023-08-31 02:39:26,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3418 transitions. [2023-08-31 02:39:26,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:26,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3418 transitions. [2023-08-31 02:39:26,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 65.73076923076923) internal successors, (3418), 52 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:26,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 152.0) internal successors, (8056), 53 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:26,518 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 152.0) internal successors, (8056), 53 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:26,518 INFO L175 Difference]: Start difference. First operand has 198 places, 236 transitions, 2394 flow. Second operand 52 states and 3418 transitions. [2023-08-31 02:39:26,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 415 transitions, 4204 flow [2023-08-31 02:39:26,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 415 transitions, 3734 flow, removed 114 selfloop flow, removed 22 redundant places. [2023-08-31 02:39:26,554 INFO L231 Difference]: Finished difference. Result has 232 places, 236 transitions, 2576 flow [2023-08-31 02:39:26,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2576, PETRI_PLACES=232, PETRI_TRANSITIONS=236} [2023-08-31 02:39:26,555 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 212 predicate places. [2023-08-31 02:39:26,555 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 236 transitions, 2576 flow [2023-08-31 02:39:26,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.875) internal successors, (1485), 24 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:26,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:26,556 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:26,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:26,760 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 [2023-08-31 02:39:26,760 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:26,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:26,761 INFO L85 PathProgramCache]: Analyzing trace with hash -677900520, now seen corresponding path program 13 times [2023-08-31 02:39:26,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:26,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291141561] [2023-08-31 02:39:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:26,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:26,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:26,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291141561] [2023-08-31 02:39:26,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291141561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:26,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866485613] [2023-08-31 02:39:26,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:39:26,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:26,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:26,977 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) [2023-08-31 02:39:26,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 02:39:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:27,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:27,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:27,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866485613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:27,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:27,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-31 02:39:27,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705196481] [2023-08-31 02:39:27,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:27,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 02:39:27,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:27,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 02:39:27,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-08-31 02:39:27,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:27,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 236 transitions, 2576 flow. Second operand has 24 states, 24 states have (on average 61.916666666666664) internal successors, (1486), 24 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:27,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:27,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:27,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:28,404 INFO L130 PetriNetUnfolder]: 552/1188 cut-off events. [2023-08-31 02:39:28,404 INFO L131 PetriNetUnfolder]: For 8278/8278 co-relation queries the response was YES. [2023-08-31 02:39:28,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6347 conditions, 1188 events. 552/1188 cut-off events. For 8278/8278 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7464 event pairs, 10 based on Foata normal form. 3/1187 useless extension candidates. Maximal degree in co-relation 6208. Up to 307 conditions per place. [2023-08-31 02:39:28,413 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 145 selfloop transitions, 141 changer transitions 36/322 dead transitions. [2023-08-31 02:39:28,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 322 transitions, 3658 flow [2023-08-31 02:39:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 02:39:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 02:39:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1523 transitions. [2023-08-31 02:39:28,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43564073226544625 [2023-08-31 02:39:28,417 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1523 transitions. [2023-08-31 02:39:28,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1523 transitions. [2023-08-31 02:39:28,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:28,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1523 transitions. [2023-08-31 02:39:28,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 66.21739130434783) internal successors, (1523), 23 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:28,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:28,422 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:28,422 INFO L175 Difference]: Start difference. First operand has 232 places, 236 transitions, 2576 flow. Second operand 23 states and 1523 transitions. [2023-08-31 02:39:28,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 322 transitions, 3658 flow [2023-08-31 02:39:28,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 322 transitions, 3333 flow, removed 77 selfloop flow, removed 29 redundant places. [2023-08-31 02:39:28,454 INFO L231 Difference]: Finished difference. Result has 217 places, 233 transitions, 2639 flow [2023-08-31 02:39:28,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2639, PETRI_PLACES=217, PETRI_TRANSITIONS=233} [2023-08-31 02:39:28,454 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-08-31 02:39:28,455 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 233 transitions, 2639 flow [2023-08-31 02:39:28,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.916666666666664) internal successors, (1486), 24 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:28,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:28,455 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:28,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:28,659 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 [2023-08-31 02:39:28,660 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:28,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash 948168439, now seen corresponding path program 4 times [2023-08-31 02:39:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:28,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806041622] [2023-08-31 02:39:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:28,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:28,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:28,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806041622] [2023-08-31 02:39:28,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806041622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:28,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103067416] [2023-08-31 02:39:28,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:39:28,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:28,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:28,803 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) [2023-08-31 02:39:28,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 02:39:28,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:39:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:28,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 02:39:28,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:28,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:29,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103067416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:29,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:29,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 02:39:29,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136518937] [2023-08-31 02:39:29,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:29,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 02:39:29,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:29,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 02:39:29,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-31 02:39:29,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:29,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 233 transitions, 2639 flow. Second operand has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:29,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:29,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:29,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:29,781 INFO L130 PetriNetUnfolder]: 532/1147 cut-off events. [2023-08-31 02:39:29,782 INFO L131 PetriNetUnfolder]: For 8132/8132 co-relation queries the response was YES. [2023-08-31 02:39:29,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 1147 events. 532/1147 cut-off events. For 8132/8132 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7147 event pairs, 10 based on Foata normal form. 10/1153 useless extension candidates. Maximal degree in co-relation 5956. Up to 341 conditions per place. [2023-08-31 02:39:29,791 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 173 selfloop transitions, 90 changer transitions 50/313 dead transitions. [2023-08-31 02:39:29,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 313 transitions, 3653 flow [2023-08-31 02:39:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 02:39:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 02:39:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1383 transitions. [2023-08-31 02:39:29,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332706766917293 [2023-08-31 02:39:29,799 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1383 transitions. [2023-08-31 02:39:29,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1383 transitions. [2023-08-31 02:39:29,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:29,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1383 transitions. [2023-08-31 02:39:29,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 65.85714285714286) internal successors, (1383), 21 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:29,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 152.0) internal successors, (3344), 22 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:29,804 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 152.0) internal successors, (3344), 22 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:29,804 INFO L175 Difference]: Start difference. First operand has 217 places, 233 transitions, 2639 flow. Second operand 21 states and 1383 transitions. [2023-08-31 02:39:29,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 313 transitions, 3653 flow [2023-08-31 02:39:29,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 313 transitions, 3319 flow, removed 80 selfloop flow, removed 15 redundant places. [2023-08-31 02:39:29,842 INFO L231 Difference]: Finished difference. Result has 221 places, 216 transitions, 2336 flow [2023-08-31 02:39:29,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2336, PETRI_PLACES=221, PETRI_TRANSITIONS=216} [2023-08-31 02:39:29,843 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 201 predicate places. [2023-08-31 02:39:29,843 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 216 transitions, 2336 flow [2023-08-31 02:39:29,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:29,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:29,843 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:29,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:30,047 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 [2023-08-31 02:39:30,048 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:30,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:30,048 INFO L85 PathProgramCache]: Analyzing trace with hash -731371048, now seen corresponding path program 14 times [2023-08-31 02:39:30,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:30,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675037169] [2023-08-31 02:39:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:30,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:30,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:30,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675037169] [2023-08-31 02:39:30,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675037169] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:30,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523845364] [2023-08-31 02:39:30,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:39:30,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:30,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:30,215 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) [2023-08-31 02:39:30,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 02:39:30,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:39:30,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:30,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:30,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523845364] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:30,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:30,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-31 02:39:30,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080834003] [2023-08-31 02:39:30,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:30,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 02:39:30,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 02:39:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-08-31 02:39:30,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:30,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 216 transitions, 2336 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:30,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:30,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:30,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:32,098 INFO L130 PetriNetUnfolder]: 573/1253 cut-off events. [2023-08-31 02:39:32,098 INFO L131 PetriNetUnfolder]: For 9713/9713 co-relation queries the response was YES. [2023-08-31 02:39:32,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6690 conditions, 1253 events. 573/1253 cut-off events. For 9713/9713 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8092 event pairs, 6 based on Foata normal form. 13/1262 useless extension candidates. Maximal degree in co-relation 6613. Up to 343 conditions per place. [2023-08-31 02:39:32,121 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 139 selfloop transitions, 144 changer transitions 94/377 dead transitions. [2023-08-31 02:39:32,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 377 transitions, 4416 flow [2023-08-31 02:39:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 02:39:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 02:39:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2525 transitions. [2023-08-31 02:39:32,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425944669365722 [2023-08-31 02:39:32,127 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2525 transitions. [2023-08-31 02:39:32,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2525 transitions. [2023-08-31 02:39:32,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:32,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2525 transitions. [2023-08-31 02:39:32,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 64.74358974358974) internal successors, (2525), 39 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:32,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 152.0) internal successors, (6080), 40 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:32,140 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 152.0) internal successors, (6080), 40 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:32,140 INFO L175 Difference]: Start difference. First operand has 221 places, 216 transitions, 2336 flow. Second operand 39 states and 2525 transitions. [2023-08-31 02:39:32,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 377 transitions, 4416 flow [2023-08-31 02:39:32,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 377 transitions, 4066 flow, removed 60 selfloop flow, removed 26 redundant places. [2023-08-31 02:39:32,195 INFO L231 Difference]: Finished difference. Result has 228 places, 211 transitions, 2624 flow [2023-08-31 02:39:32,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2624, PETRI_PLACES=228, PETRI_TRANSITIONS=211} [2023-08-31 02:39:32,197 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 208 predicate places. [2023-08-31 02:39:32,197 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 211 transitions, 2624 flow [2023-08-31 02:39:32,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:32,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:32,197 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:32,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-31 02:39:32,402 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 [2023-08-31 02:39:32,402 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:32,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:32,402 INFO L85 PathProgramCache]: Analyzing trace with hash 767361305, now seen corresponding path program 5 times [2023-08-31 02:39:32,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:32,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968260862] [2023-08-31 02:39:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:32,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:32,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:32,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968260862] [2023-08-31 02:39:32,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968260862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:32,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391529000] [2023-08-31 02:39:32,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:39:32,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:32,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:32,593 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) [2023-08-31 02:39:32,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 02:39:32,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:39:32,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 02:39:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:32,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:32,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391529000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:32,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:32,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 02:39:32,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806058574] [2023-08-31 02:39:32,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:32,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 02:39:32,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 02:39:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-08-31 02:39:33,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:33,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 211 transitions, 2624 flow. Second operand has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:33,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:33,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:33,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:33,801 INFO L130 PetriNetUnfolder]: 488/1033 cut-off events. [2023-08-31 02:39:33,801 INFO L131 PetriNetUnfolder]: For 8940/8940 co-relation queries the response was YES. [2023-08-31 02:39:33,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5916 conditions, 1033 events. 488/1033 cut-off events. For 8940/8940 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6133 event pairs, 12 based on Foata normal form. 14/1047 useless extension candidates. Maximal degree in co-relation 5861. Up to 307 conditions per place. [2023-08-31 02:39:33,809 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 172 selfloop transitions, 102 changer transitions 33/307 dead transitions. [2023-08-31 02:39:33,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 307 transitions, 4032 flow [2023-08-31 02:39:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 02:39:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 02:39:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1571 transitions. [2023-08-31 02:39:33,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43064692982456143 [2023-08-31 02:39:33,810 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1571 transitions. [2023-08-31 02:39:33,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1571 transitions. [2023-08-31 02:39:33,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:33,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1571 transitions. [2023-08-31 02:39:33,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.45833333333333) internal successors, (1571), 24 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:33,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:33,833 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:33,833 INFO L175 Difference]: Start difference. First operand has 228 places, 211 transitions, 2624 flow. Second operand 24 states and 1571 transitions. [2023-08-31 02:39:33,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 307 transitions, 4032 flow [2023-08-31 02:39:33,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 307 transitions, 3591 flow, removed 146 selfloop flow, removed 32 redundant places. [2023-08-31 02:39:33,864 INFO L231 Difference]: Finished difference. Result has 191 places, 216 transitions, 2510 flow [2023-08-31 02:39:33,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2510, PETRI_PLACES=191, PETRI_TRANSITIONS=216} [2023-08-31 02:39:33,864 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-08-31 02:39:33,864 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 216 transitions, 2510 flow [2023-08-31 02:39:33,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:33,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:33,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:33,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:34,065 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 [2023-08-31 02:39:34,065 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:34,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1622667959, now seen corresponding path program 6 times [2023-08-31 02:39:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:34,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919189879] [2023-08-31 02:39:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:34,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:34,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:34,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919189879] [2023-08-31 02:39:34,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919189879] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:34,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229604861] [2023-08-31 02:39:34,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:39:34,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:34,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:34,187 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) [2023-08-31 02:39:34,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 02:39:34,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:39:34,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:34,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 02:39:34,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:34,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:34,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229604861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:34,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:34,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 02:39:34,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773228811] [2023-08-31 02:39:34,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:34,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 02:39:34,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 02:39:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-31 02:39:34,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:34,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 216 transitions, 2510 flow. Second operand has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:34,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:34,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:34,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:35,141 INFO L130 PetriNetUnfolder]: 506/1046 cut-off events. [2023-08-31 02:39:35,141 INFO L131 PetriNetUnfolder]: For 7465/7465 co-relation queries the response was YES. [2023-08-31 02:39:35,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5782 conditions, 1046 events. 506/1046 cut-off events. For 7465/7465 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6101 event pairs, 8 based on Foata normal form. 5/1051 useless extension candidates. Maximal degree in co-relation 5735. Up to 329 conditions per place. [2023-08-31 02:39:35,149 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 183 selfloop transitions, 111 changer transitions 17/311 dead transitions. [2023-08-31 02:39:35,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 311 transitions, 3841 flow [2023-08-31 02:39:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 02:39:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 02:39:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1258 transitions. [2023-08-31 02:39:35,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435595567867036 [2023-08-31 02:39:35,154 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1258 transitions. [2023-08-31 02:39:35,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1258 transitions. [2023-08-31 02:39:35,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:35,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1258 transitions. [2023-08-31 02:39:35,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.21052631578948) internal successors, (1258), 19 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:35,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:35,157 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:35,158 INFO L175 Difference]: Start difference. First operand has 191 places, 216 transitions, 2510 flow. Second operand 19 states and 1258 transitions. [2023-08-31 02:39:35,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 311 transitions, 3841 flow [2023-08-31 02:39:35,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 311 transitions, 3616 flow, removed 54 selfloop flow, removed 17 redundant places. [2023-08-31 02:39:35,188 INFO L231 Difference]: Finished difference. Result has 194 places, 240 transitions, 2941 flow [2023-08-31 02:39:35,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2941, PETRI_PLACES=194, PETRI_TRANSITIONS=240} [2023-08-31 02:39:35,189 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-08-31 02:39:35,190 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 240 transitions, 2941 flow [2023-08-31 02:39:35,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.65) internal successors, (1233), 20 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:35,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:35,190 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:35,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:35,395 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 [2023-08-31 02:39:35,395 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:35,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1548978479, now seen corresponding path program 7 times [2023-08-31 02:39:35,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:35,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100382261] [2023-08-31 02:39:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:35,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:35,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:35,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100382261] [2023-08-31 02:39:35,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100382261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:35,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077592266] [2023-08-31 02:39:35,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:39:35,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:35,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:35,506 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) [2023-08-31 02:39:35,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 02:39:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:35,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 02:39:35,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:35,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:35,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077592266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:35,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:35,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 02:39:35,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143966232] [2023-08-31 02:39:35,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:35,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 02:39:35,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:35,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 02:39:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-31 02:39:35,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:35,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 240 transitions, 2941 flow. Second operand has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:35,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:35,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:35,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:36,433 INFO L130 PetriNetUnfolder]: 499/1021 cut-off events. [2023-08-31 02:39:36,433 INFO L131 PetriNetUnfolder]: For 7989/7989 co-relation queries the response was YES. [2023-08-31 02:39:36,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 1021 events. 499/1021 cut-off events. For 7989/7989 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5885 event pairs, 8 based on Foata normal form. 3/1024 useless extension candidates. Maximal degree in co-relation 5845. Up to 329 conditions per place. [2023-08-31 02:39:36,439 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 178 selfloop transitions, 101 changer transitions 19/298 dead transitions. [2023-08-31 02:39:36,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 298 transitions, 3838 flow [2023-08-31 02:39:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 02:39:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 02:39:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1246 transitions. [2023-08-31 02:39:36,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314404432132964 [2023-08-31 02:39:36,458 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1246 transitions. [2023-08-31 02:39:36,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1246 transitions. [2023-08-31 02:39:36,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:36,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1246 transitions. [2023-08-31 02:39:36,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.57894736842105) internal successors, (1246), 19 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:36,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:36,461 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:36,461 INFO L175 Difference]: Start difference. First operand has 194 places, 240 transitions, 2941 flow. Second operand 19 states and 1246 transitions. [2023-08-31 02:39:36,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 298 transitions, 3838 flow [2023-08-31 02:39:36,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 298 transitions, 3706 flow, removed 27 selfloop flow, removed 10 redundant places. [2023-08-31 02:39:36,496 INFO L231 Difference]: Finished difference. Result has 202 places, 238 transitions, 3009 flow [2023-08-31 02:39:36,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3009, PETRI_PLACES=202, PETRI_TRANSITIONS=238} [2023-08-31 02:39:36,496 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2023-08-31 02:39:36,497 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 238 transitions, 3009 flow [2023-08-31 02:39:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:36,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:36,497 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:36,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:36,702 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 [2023-08-31 02:39:36,702 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:36,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash 240012320, now seen corresponding path program 15 times [2023-08-31 02:39:36,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:36,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162540865] [2023-08-31 02:39:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:36,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:36,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:36,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162540865] [2023-08-31 02:39:36,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162540865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:36,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237568009] [2023-08-31 02:39:36,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:39:36,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:36,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:36,832 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) [2023-08-31 02:39:36,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 02:39:36,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 02:39:36,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:36,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:36,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:37,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:37,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237568009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:37,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:37,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-31 02:39:37,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786074841] [2023-08-31 02:39:37,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:37,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 02:39:37,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 02:39:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-08-31 02:39:37,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:37,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 238 transitions, 3009 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:37,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:37,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:37,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:38,508 INFO L130 PetriNetUnfolder]: 558/1144 cut-off events. [2023-08-31 02:39:38,508 INFO L131 PetriNetUnfolder]: For 9340/9340 co-relation queries the response was YES. [2023-08-31 02:39:38,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6745 conditions, 1144 events. 558/1144 cut-off events. For 9340/9340 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6777 event pairs, 3 based on Foata normal form. 5/1149 useless extension candidates. Maximal degree in co-relation 6693. Up to 561 conditions per place. [2023-08-31 02:39:38,514 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 231 selfloop transitions, 85 changer transitions 51/367 dead transitions. [2023-08-31 02:39:38,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 367 transitions, 4711 flow [2023-08-31 02:39:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 02:39:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 02:39:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2386 transitions. [2023-08-31 02:39:38,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42425320056899 [2023-08-31 02:39:38,518 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2386 transitions. [2023-08-31 02:39:38,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2386 transitions. [2023-08-31 02:39:38,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:38,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2386 transitions. [2023-08-31 02:39:38,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.48648648648648) internal successors, (2386), 37 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:38,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:38,524 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:38,524 INFO L175 Difference]: Start difference. First operand has 202 places, 238 transitions, 3009 flow. Second operand 37 states and 2386 transitions. [2023-08-31 02:39:38,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 367 transitions, 4711 flow [2023-08-31 02:39:38,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 367 transitions, 4424 flow, removed 49 selfloop flow, removed 17 redundant places. [2023-08-31 02:39:38,562 INFO L231 Difference]: Finished difference. Result has 227 places, 258 transitions, 3410 flow [2023-08-31 02:39:38,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3410, PETRI_PLACES=227, PETRI_TRANSITIONS=258} [2023-08-31 02:39:38,562 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 207 predicate places. [2023-08-31 02:39:38,563 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 258 transitions, 3410 flow [2023-08-31 02:39:38,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:38,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:38,563 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:38,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-31 02:39:38,767 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 [2023-08-31 02:39:38,768 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:38,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:38,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2011172568, now seen corresponding path program 16 times [2023-08-31 02:39:38,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:38,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006753936] [2023-08-31 02:39:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:38,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:38,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:38,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006753936] [2023-08-31 02:39:38,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006753936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:38,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125751197] [2023-08-31 02:39:38,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:39:38,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:38,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:38,899 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) [2023-08-31 02:39:38,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 02:39:38,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:39:38,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:38,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:38,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:39,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:39,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125751197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:39,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:39,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-31 02:39:39,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828833582] [2023-08-31 02:39:39,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:39,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 02:39:39,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:39,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 02:39:39,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-08-31 02:39:39,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:39,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 258 transitions, 3410 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:39,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:39,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:39,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:39,807 INFO L130 PetriNetUnfolder]: 521/1041 cut-off events. [2023-08-31 02:39:39,808 INFO L131 PetriNetUnfolder]: For 8851/8851 co-relation queries the response was YES. [2023-08-31 02:39:39,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6454 conditions, 1041 events. 521/1041 cut-off events. For 8851/8851 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5865 event pairs, 7 based on Foata normal form. 3/1044 useless extension candidates. Maximal degree in co-relation 6397. Up to 693 conditions per place. [2023-08-31 02:39:39,813 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 216 selfloop transitions, 46 changer transitions 30/292 dead transitions. [2023-08-31 02:39:39,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 292 transitions, 4160 flow [2023-08-31 02:39:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 02:39:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 02:39:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 963 transitions. [2023-08-31 02:39:39,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42236842105263156 [2023-08-31 02:39:39,814 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 963 transitions. [2023-08-31 02:39:39,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 963 transitions. [2023-08-31 02:39:39,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:39,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 963 transitions. [2023-08-31 02:39:39,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 64.2) internal successors, (963), 15 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:39,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 152.0) internal successors, (2432), 16 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:39,817 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 152.0) internal successors, (2432), 16 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:39,817 INFO L175 Difference]: Start difference. First operand has 227 places, 258 transitions, 3410 flow. Second operand 15 states and 963 transitions. [2023-08-31 02:39:39,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 292 transitions, 4160 flow [2023-08-31 02:39:39,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 292 transitions, 3690 flow, removed 164 selfloop flow, removed 21 redundant places. [2023-08-31 02:39:39,853 INFO L231 Difference]: Finished difference. Result has 208 places, 253 transitions, 3010 flow [2023-08-31 02:39:39,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3010, PETRI_PLACES=208, PETRI_TRANSITIONS=253} [2023-08-31 02:39:39,853 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2023-08-31 02:39:39,853 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 253 transitions, 3010 flow [2023-08-31 02:39:39,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:39,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:39,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:39,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-31 02:39:40,055 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 [2023-08-31 02:39:40,055 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:40,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:40,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1960378635, now seen corresponding path program 8 times [2023-08-31 02:39:40,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:40,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242561134] [2023-08-31 02:39:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:40,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:40,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:40,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242561134] [2023-08-31 02:39:40,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242561134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:40,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205598081] [2023-08-31 02:39:40,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:39:40,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:40,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:40,162 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) [2023-08-31 02:39:40,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 02:39:40,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:39:40,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:40,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 02:39:40,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:40,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:40,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205598081] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:40,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:40,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 02:39:40,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172877718] [2023-08-31 02:39:40,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:40,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 02:39:40,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:40,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 02:39:40,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-31 02:39:40,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:40,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 253 transitions, 3010 flow. Second operand has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:40,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:40,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:40,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:40,979 INFO L130 PetriNetUnfolder]: 511/1007 cut-off events. [2023-08-31 02:39:40,979 INFO L131 PetriNetUnfolder]: For 8066/8066 co-relation queries the response was YES. [2023-08-31 02:39:40,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5805 conditions, 1007 events. 511/1007 cut-off events. For 8066/8066 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5546 event pairs, 9 based on Foata normal form. 9/1016 useless extension candidates. Maximal degree in co-relation 5752. Up to 657 conditions per place. [2023-08-31 02:39:40,984 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 236 selfloop transitions, 31 changer transitions 41/308 dead transitions. [2023-08-31 02:39:40,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 308 transitions, 3877 flow [2023-08-31 02:39:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 02:39:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 02:39:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1233 transitions. [2023-08-31 02:39:40,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42693905817174516 [2023-08-31 02:39:40,985 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1233 transitions. [2023-08-31 02:39:40,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1233 transitions. [2023-08-31 02:39:40,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:40,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1233 transitions. [2023-08-31 02:39:40,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:40,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:40,988 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:40,988 INFO L175 Difference]: Start difference. First operand has 208 places, 253 transitions, 3010 flow. Second operand 19 states and 1233 transitions. [2023-08-31 02:39:40,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 308 transitions, 3877 flow [2023-08-31 02:39:41,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 308 transitions, 3653 flow, removed 21 selfloop flow, removed 17 redundant places. [2023-08-31 02:39:41,024 INFO L231 Difference]: Finished difference. Result has 200 places, 241 transitions, 2722 flow [2023-08-31 02:39:41,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2722, PETRI_PLACES=200, PETRI_TRANSITIONS=241} [2023-08-31 02:39:41,025 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-08-31 02:39:41,025 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 241 transitions, 2722 flow [2023-08-31 02:39:41,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:41,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:41,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:41,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:41,226 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 [2023-08-31 02:39:41,227 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:41,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:41,227 INFO L85 PathProgramCache]: Analyzing trace with hash 280573377, now seen corresponding path program 9 times [2023-08-31 02:39:41,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:41,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324702697] [2023-08-31 02:39:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:41,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:41,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:41,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324702697] [2023-08-31 02:39:41,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324702697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:41,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400544258] [2023-08-31 02:39:41,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:39:41,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:41,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:41,338 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) [2023-08-31 02:39:41,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 02:39:41,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:39:41,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 02:39:41,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:41,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:41,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400544258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:41,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:41,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-31 02:39:41,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751986832] [2023-08-31 02:39:41,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:41,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 02:39:41,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:41,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 02:39:41,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-31 02:39:41,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:41,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 241 transitions, 2722 flow. Second operand has 20 states, 20 states have (on average 61.6) internal successors, (1232), 20 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:41,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:41,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:41,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:42,251 INFO L130 PetriNetUnfolder]: 463/959 cut-off events. [2023-08-31 02:39:42,252 INFO L131 PetriNetUnfolder]: For 5782/5782 co-relation queries the response was YES. [2023-08-31 02:39:42,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5283 conditions, 959 events. 463/959 cut-off events. For 5782/5782 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5503 event pairs, 7 based on Foata normal form. 7/964 useless extension candidates. Maximal degree in co-relation 5237. Up to 657 conditions per place. [2023-08-31 02:39:42,256 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 248 selfloop transitions, 28 changer transitions 18/294 dead transitions. [2023-08-31 02:39:42,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 294 transitions, 3593 flow [2023-08-31 02:39:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 02:39:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 02:39:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1108 transitions. [2023-08-31 02:39:42,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42879256965944273 [2023-08-31 02:39:42,257 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1108 transitions. [2023-08-31 02:39:42,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1108 transitions. [2023-08-31 02:39:42,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:42,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1108 transitions. [2023-08-31 02:39:42,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.17647058823529) internal successors, (1108), 17 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:42,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:42,260 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:42,260 INFO L175 Difference]: Start difference. First operand has 200 places, 241 transitions, 2722 flow. Second operand 17 states and 1108 transitions. [2023-08-31 02:39:42,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 294 transitions, 3593 flow [2023-08-31 02:39:42,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 294 transitions, 3387 flow, removed 31 selfloop flow, removed 16 redundant places. [2023-08-31 02:39:42,285 INFO L231 Difference]: Finished difference. Result has 198 places, 240 transitions, 2638 flow [2023-08-31 02:39:42,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2638, PETRI_PLACES=198, PETRI_TRANSITIONS=240} [2023-08-31 02:39:42,289 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-08-31 02:39:42,289 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 240 transitions, 2638 flow [2023-08-31 02:39:42,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.6) internal successors, (1232), 20 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:42,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:42,290 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:42,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-31 02:39:42,494 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 [2023-08-31 02:39:42,494 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:42,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:42,494 INFO L85 PathProgramCache]: Analyzing trace with hash -606930304, now seen corresponding path program 17 times [2023-08-31 02:39:42,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:42,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982782651] [2023-08-31 02:39:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:42,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:42,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:42,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982782651] [2023-08-31 02:39:42,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982782651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:42,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442733660] [2023-08-31 02:39:42,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:39:42,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:42,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:42,606 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) [2023-08-31 02:39:42,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 02:39:42,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:39:42,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:42,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:42,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:43,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442733660] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:43,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:43,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-31 02:39:43,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048481803] [2023-08-31 02:39:43,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:43,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 02:39:43,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 02:39:43,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-31 02:39:43,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:43,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 240 transitions, 2638 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:43,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:43,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:43,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:44,226 INFO L130 PetriNetUnfolder]: 478/996 cut-off events. [2023-08-31 02:39:44,226 INFO L131 PetriNetUnfolder]: For 5549/5549 co-relation queries the response was YES. [2023-08-31 02:39:44,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5524 conditions, 996 events. 478/996 cut-off events. For 5549/5549 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5773 event pairs, 3 based on Foata normal form. 3/995 useless extension candidates. Maximal degree in co-relation 5478. Up to 535 conditions per place. [2023-08-31 02:39:44,231 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 221 selfloop transitions, 78 changer transitions 18/317 dead transitions. [2023-08-31 02:39:44,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 317 transitions, 3735 flow [2023-08-31 02:39:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 02:39:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 02:39:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1864 transitions. [2023-08-31 02:39:44,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42286751361161523 [2023-08-31 02:39:44,233 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1864 transitions. [2023-08-31 02:39:44,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1864 transitions. [2023-08-31 02:39:44,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:44,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1864 transitions. [2023-08-31 02:39:44,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 64.27586206896552) internal successors, (1864), 29 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:44,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 152.0) internal successors, (4560), 30 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:44,241 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 152.0) internal successors, (4560), 30 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:44,241 INFO L175 Difference]: Start difference. First operand has 198 places, 240 transitions, 2638 flow. Second operand 29 states and 1864 transitions. [2023-08-31 02:39:44,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 317 transitions, 3735 flow [2023-08-31 02:39:44,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 317 transitions, 3663 flow, removed 24 selfloop flow, removed 11 redundant places. [2023-08-31 02:39:44,264 INFO L231 Difference]: Finished difference. Result has 219 places, 251 transitions, 2946 flow [2023-08-31 02:39:44,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2946, PETRI_PLACES=219, PETRI_TRANSITIONS=251} [2023-08-31 02:39:44,265 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2023-08-31 02:39:44,265 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 251 transitions, 2946 flow [2023-08-31 02:39:44,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:44,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:44,265 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:44,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:44,472 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 [2023-08-31 02:39:44,473 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:44,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:44,473 INFO L85 PathProgramCache]: Analyzing trace with hash -579224674, now seen corresponding path program 18 times [2023-08-31 02:39:44,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:44,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418812299] [2023-08-31 02:39:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:44,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:44,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:44,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418812299] [2023-08-31 02:39:44,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418812299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:44,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248428987] [2023-08-31 02:39:44,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:39:44,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:44,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:44,602 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) [2023-08-31 02:39:44,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 02:39:44,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:39:44,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:44,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:44,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:44,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:45,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248428987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:45,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:45,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-31 02:39:45,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093286648] [2023-08-31 02:39:45,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:45,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 02:39:45,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 02:39:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-31 02:39:45,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:45,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 251 transitions, 2946 flow. Second operand has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:45,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:45,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:45,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:46,315 INFO L130 PetriNetUnfolder]: 474/971 cut-off events. [2023-08-31 02:39:46,316 INFO L131 PetriNetUnfolder]: For 6452/6452 co-relation queries the response was YES. [2023-08-31 02:39:46,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5697 conditions, 971 events. 474/971 cut-off events. For 6452/6452 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5491 event pairs, 5 based on Foata normal form. 6/975 useless extension candidates. Maximal degree in co-relation 5648. Up to 537 conditions per place. [2023-08-31 02:39:46,320 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 199 selfloop transitions, 79 changer transitions 39/317 dead transitions. [2023-08-31 02:39:46,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 317 transitions, 3925 flow [2023-08-31 02:39:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 02:39:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 02:39:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2050 transitions. [2023-08-31 02:39:46,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214638157894737 [2023-08-31 02:39:46,322 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2050 transitions. [2023-08-31 02:39:46,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2050 transitions. [2023-08-31 02:39:46,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:46,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2050 transitions. [2023-08-31 02:39:46,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 64.0625) internal successors, (2050), 32 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) [2023-08-31 02:39:46,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 152.0) internal successors, (5016), 33 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:46,327 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 152.0) internal successors, (5016), 33 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:46,327 INFO L175 Difference]: Start difference. First operand has 219 places, 251 transitions, 2946 flow. Second operand 32 states and 2050 transitions. [2023-08-31 02:39:46,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 317 transitions, 3925 flow [2023-08-31 02:39:46,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 317 transitions, 3777 flow, removed 61 selfloop flow, removed 9 redundant places. [2023-08-31 02:39:46,354 INFO L231 Difference]: Finished difference. Result has 235 places, 246 transitions, 2926 flow [2023-08-31 02:39:46,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2926, PETRI_PLACES=235, PETRI_TRANSITIONS=246} [2023-08-31 02:39:46,355 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 215 predicate places. [2023-08-31 02:39:46,355 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 246 transitions, 2926 flow [2023-08-31 02:39:46,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.833333333333336) internal successors, (1484), 24 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:46,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:46,355 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:46,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-31 02:39:46,555 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 [2023-08-31 02:39:46,555 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:46,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:46,556 INFO L85 PathProgramCache]: Analyzing trace with hash 925330163, now seen corresponding path program 19 times [2023-08-31 02:39:46,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:46,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747189626] [2023-08-31 02:39:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:46,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:46,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747189626] [2023-08-31 02:39:46,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747189626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270415389] [2023-08-31 02:39:46,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:39:46,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:46,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:46,679 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) [2023-08-31 02:39:46,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 02:39:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:46,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 02:39:46,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:46,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:47,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270415389] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:47,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:47,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-08-31 02:39:47,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280384280] [2023-08-31 02:39:47,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:47,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 02:39:47,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:47,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 02:39:47,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-08-31 02:39:47,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:47,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 246 transitions, 2926 flow. Second operand has 26 states, 26 states have (on average 61.80769230769231) internal successors, (1607), 26 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:47,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:47,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:47,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:48,544 INFO L130 PetriNetUnfolder]: 559/1145 cut-off events. [2023-08-31 02:39:48,544 INFO L131 PetriNetUnfolder]: For 7330/7330 co-relation queries the response was YES. [2023-08-31 02:39:48,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 1145 events. 559/1145 cut-off events. For 7330/7330 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6788 event pairs, 3 based on Foata normal form. 3/1146 useless extension candidates. Maximal degree in co-relation 6863. Up to 419 conditions per place. [2023-08-31 02:39:48,550 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 180 selfloop transitions, 198 changer transitions 20/398 dead transitions. [2023-08-31 02:39:48,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 398 transitions, 4924 flow [2023-08-31 02:39:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-31 02:39:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-31 02:39:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2707 transitions. [2023-08-31 02:39:48,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42402882205513787 [2023-08-31 02:39:48,553 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2707 transitions. [2023-08-31 02:39:48,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2707 transitions. [2023-08-31 02:39:48,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:48,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2707 transitions. [2023-08-31 02:39:48,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 64.45238095238095) internal successors, (2707), 42 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:48,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 152.0) internal successors, (6536), 43 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:48,558 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 152.0) internal successors, (6536), 43 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:48,558 INFO L175 Difference]: Start difference. First operand has 235 places, 246 transitions, 2926 flow. Second operand 42 states and 2707 transitions. [2023-08-31 02:39:48,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 398 transitions, 4924 flow [2023-08-31 02:39:48,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 398 transitions, 4665 flow, removed 76 selfloop flow, removed 23 redundant places. [2023-08-31 02:39:48,591 INFO L231 Difference]: Finished difference. Result has 247 places, 292 transitions, 3892 flow [2023-08-31 02:39:48,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3892, PETRI_PLACES=247, PETRI_TRANSITIONS=292} [2023-08-31 02:39:48,591 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-08-31 02:39:48,592 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 292 transitions, 3892 flow [2023-08-31 02:39:48,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.80769230769231) internal successors, (1607), 26 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:48,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:48,592 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:48,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-31 02:39:48,796 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 [2023-08-31 02:39:48,797 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:48,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1602770469, now seen corresponding path program 20 times [2023-08-31 02:39:48,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:48,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894316048] [2023-08-31 02:39:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:48,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:48,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894316048] [2023-08-31 02:39:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894316048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242109557] [2023-08-31 02:39:48,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:39:48,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:48,919 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) [2023-08-31 02:39:48,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 02:39:48,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:39:48,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 02:39:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:49,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:49,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242109557] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:49,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:49,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-08-31 02:39:49,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106626700] [2023-08-31 02:39:49,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:49,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 02:39:49,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 02:39:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-08-31 02:39:49,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:49,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 292 transitions, 3892 flow. Second operand has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:49,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:49,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:49,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:50,895 INFO L130 PetriNetUnfolder]: 549/1111 cut-off events. [2023-08-31 02:39:50,895 INFO L131 PetriNetUnfolder]: For 7722/7722 co-relation queries the response was YES. [2023-08-31 02:39:50,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7262 conditions, 1111 events. 549/1111 cut-off events. For 7722/7722 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6445 event pairs, 3 based on Foata normal form. 3/1102 useless extension candidates. Maximal degree in co-relation 7206. Up to 367 conditions per place. [2023-08-31 02:39:50,902 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 167 selfloop transitions, 180 changer transitions 27/374 dead transitions. [2023-08-31 02:39:50,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 374 transitions, 5031 flow [2023-08-31 02:39:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 02:39:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 02:39:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2384 transitions. [2023-08-31 02:39:50,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238975817923186 [2023-08-31 02:39:50,904 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2384 transitions. [2023-08-31 02:39:50,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2384 transitions. [2023-08-31 02:39:50,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:50,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2384 transitions. [2023-08-31 02:39:50,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.43243243243244) internal successors, (2384), 37 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:50,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:50,909 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:50,909 INFO L175 Difference]: Start difference. First operand has 247 places, 292 transitions, 3892 flow. Second operand 37 states and 2384 transitions. [2023-08-31 02:39:50,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 374 transitions, 5031 flow [2023-08-31 02:39:50,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 374 transitions, 4764 flow, removed 64 selfloop flow, removed 20 redundant places. [2023-08-31 02:39:50,947 INFO L231 Difference]: Finished difference. Result has 259 places, 285 transitions, 3911 flow [2023-08-31 02:39:50,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3911, PETRI_PLACES=259, PETRI_TRANSITIONS=285} [2023-08-31 02:39:50,947 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2023-08-31 02:39:50,947 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 285 transitions, 3911 flow [2023-08-31 02:39:50,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:50,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:50,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:50,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:51,148 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 [2023-08-31 02:39:51,148 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:51,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash 11806669, now seen corresponding path program 10 times [2023-08-31 02:39:51,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:51,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413211774] [2023-08-31 02:39:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:51,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:51,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:51,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413211774] [2023-08-31 02:39:51,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413211774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:51,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705583661] [2023-08-31 02:39:51,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:39:51,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:51,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:51,271 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) [2023-08-31 02:39:51,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 02:39:51,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:39:51,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:51,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:51,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:51,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:39:51,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705583661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:51,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:51,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-31 02:39:51,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727505707] [2023-08-31 02:39:51,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:51,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 02:39:51,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 02:39:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-08-31 02:39:51,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:51,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 285 transitions, 3911 flow. Second operand has 22 states, 22 states have (on average 61.63636363636363) internal successors, (1356), 22 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:51,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:51,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:51,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:52,262 INFO L130 PetriNetUnfolder]: 531/1086 cut-off events. [2023-08-31 02:39:52,263 INFO L131 PetriNetUnfolder]: For 7858/7858 co-relation queries the response was YES. [2023-08-31 02:39:52,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7218 conditions, 1086 events. 531/1086 cut-off events. For 7858/7858 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6316 event pairs, 5 based on Foata normal form. 6/1080 useless extension candidates. Maximal degree in co-relation 7165. Up to 739 conditions per place. [2023-08-31 02:39:52,268 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 233 selfloop transitions, 99 changer transitions 12/344 dead transitions. [2023-08-31 02:39:52,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 344 transitions, 4994 flow [2023-08-31 02:39:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 02:39:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 02:39:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1419 transitions. [2023-08-31 02:39:52,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243421052631579 [2023-08-31 02:39:52,270 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1419 transitions. [2023-08-31 02:39:52,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1419 transitions. [2023-08-31 02:39:52,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:52,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1419 transitions. [2023-08-31 02:39:52,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.5) internal successors, (1419), 22 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:52,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:52,273 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:52,273 INFO L175 Difference]: Start difference. First operand has 259 places, 285 transitions, 3911 flow. Second operand 22 states and 1419 transitions. [2023-08-31 02:39:52,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 344 transitions, 4994 flow [2023-08-31 02:39:52,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 344 transitions, 4586 flow, removed 9 selfloop flow, removed 32 redundant places. [2023-08-31 02:39:52,305 INFO L231 Difference]: Finished difference. Result has 237 places, 295 transitions, 3944 flow [2023-08-31 02:39:52,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3944, PETRI_PLACES=237, PETRI_TRANSITIONS=295} [2023-08-31 02:39:52,306 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 217 predicate places. [2023-08-31 02:39:52,306 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 295 transitions, 3944 flow [2023-08-31 02:39:52,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.63636363636363) internal successors, (1356), 22 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:52,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:52,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:52,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:52,511 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 [2023-08-31 02:39:52,511 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:52,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:52,511 INFO L85 PathProgramCache]: Analyzing trace with hash -61882811, now seen corresponding path program 11 times [2023-08-31 02:39:52,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:52,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041589064] [2023-08-31 02:39:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:52,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:52,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:52,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041589064] [2023-08-31 02:39:52,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041589064] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:52,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791439572] [2023-08-31 02:39:52,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:39:52,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:52,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:52,625 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) [2023-08-31 02:39:52,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 02:39:52,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:39:52,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:52,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-31 02:39:52,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:52,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:53,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791439572] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:53,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:53,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-31 02:39:53,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463876727] [2023-08-31 02:39:53,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:53,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 02:39:53,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:53,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 02:39:53,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-08-31 02:39:53,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:53,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 295 transitions, 3944 flow. Second operand has 27 states, 27 states have (on average 61.629629629629626) internal successors, (1664), 27 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:53,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:53,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:53,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:54,157 INFO L130 PetriNetUnfolder]: 582/1195 cut-off events. [2023-08-31 02:39:54,157 INFO L131 PetriNetUnfolder]: For 8531/8531 co-relation queries the response was YES. [2023-08-31 02:39:54,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7919 conditions, 1195 events. 582/1195 cut-off events. For 8531/8531 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7177 event pairs, 1 based on Foata normal form. 4/1185 useless extension candidates. Maximal degree in co-relation 7866. Up to 699 conditions per place. [2023-08-31 02:39:54,163 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 241 selfloop transitions, 117 changer transitions 29/387 dead transitions. [2023-08-31 02:39:54,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 387 transitions, 5428 flow [2023-08-31 02:39:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 02:39:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 02:39:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1752 transitions. [2023-08-31 02:39:54,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269005847953216 [2023-08-31 02:39:54,165 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1752 transitions. [2023-08-31 02:39:54,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1752 transitions. [2023-08-31 02:39:54,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:54,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1752 transitions. [2023-08-31 02:39:54,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 64.88888888888889) internal successors, (1752), 27 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) [2023-08-31 02:39:54,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:54,168 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:54,168 INFO L175 Difference]: Start difference. First operand has 237 places, 295 transitions, 3944 flow. Second operand 27 states and 1752 transitions. [2023-08-31 02:39:54,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 387 transitions, 5428 flow [2023-08-31 02:39:54,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 387 transitions, 5284 flow, removed 30 selfloop flow, removed 12 redundant places. [2023-08-31 02:39:54,207 INFO L231 Difference]: Finished difference. Result has 253 places, 303 transitions, 4207 flow [2023-08-31 02:39:54,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4207, PETRI_PLACES=253, PETRI_TRANSITIONS=303} [2023-08-31 02:39:54,207 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 233 predicate places. [2023-08-31 02:39:54,207 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 303 transitions, 4207 flow [2023-08-31 02:39:54,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 61.629629629629626) internal successors, (1664), 27 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:54,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:54,208 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:54,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:54,408 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 [2023-08-31 02:39:54,408 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:54,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash -905503634, now seen corresponding path program 12 times [2023-08-31 02:39:54,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:54,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707693640] [2023-08-31 02:39:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:54,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:54,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707693640] [2023-08-31 02:39:54,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707693640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763522437] [2023-08-31 02:39:54,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:39:54,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:54,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:54,503 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) [2023-08-31 02:39:54,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-31 02:39:54,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:39:54,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:54,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:54,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:54,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:54,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763522437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:54,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:54,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-08-31 02:39:54,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338241216] [2023-08-31 02:39:54,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:54,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 02:39:54,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:54,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 02:39:54,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-31 02:39:54,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:54,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 303 transitions, 4207 flow. Second operand has 20 states, 20 states have (on average 61.8) internal successors, (1236), 20 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:54,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:54,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:54,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:55,411 INFO L130 PetriNetUnfolder]: 569/1145 cut-off events. [2023-08-31 02:39:55,411 INFO L131 PetriNetUnfolder]: For 8719/8719 co-relation queries the response was YES. [2023-08-31 02:39:55,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 1145 events. 569/1145 cut-off events. For 8719/8719 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6711 event pairs, 3 based on Foata normal form. 13/1146 useless extension candidates. Maximal degree in co-relation 7890. Up to 413 conditions per place. [2023-08-31 02:39:55,417 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 76 selfloop transitions, 11 changer transitions 278/365 dead transitions. [2023-08-31 02:39:55,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 365 transitions, 5591 flow [2023-08-31 02:39:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 02:39:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 02:39:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1406 transitions. [2023-08-31 02:39:55,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2023-08-31 02:39:55,419 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1406 transitions. [2023-08-31 02:39:55,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1406 transitions. [2023-08-31 02:39:55,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:55,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1406 transitions. [2023-08-31 02:39:55,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 63.90909090909091) internal successors, (1406), 22 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:55,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:55,422 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:55,422 INFO L175 Difference]: Start difference. First operand has 253 places, 303 transitions, 4207 flow. Second operand 22 states and 1406 transitions. [2023-08-31 02:39:55,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 365 transitions, 5591 flow [2023-08-31 02:39:55,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 365 transitions, 5266 flow, removed 44 selfloop flow, removed 17 redundant places. [2023-08-31 02:39:55,462 INFO L231 Difference]: Finished difference. Result has 247 places, 83 transitions, 878 flow [2023-08-31 02:39:55,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=878, PETRI_PLACES=247, PETRI_TRANSITIONS=83} [2023-08-31 02:39:55,463 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-08-31 02:39:55,463 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 83 transitions, 878 flow [2023-08-31 02:39:55,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.8) internal successors, (1236), 20 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:55,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:55,464 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:55,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-31 02:39:55,668 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 [2023-08-31 02:39:55,668 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:55,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1325551673, now seen corresponding path program 13 times [2023-08-31 02:39:55,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:55,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631656633] [2023-08-31 02:39:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:55,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:55,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:55,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631656633] [2023-08-31 02:39:55,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631656633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:55,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141971869] [2023-08-31 02:39:55,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:39:55,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:55,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:55,777 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) [2023-08-31 02:39:55,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-31 02:39:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:55,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:55,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:55,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:39:56,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141971869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:56,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:56,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-31 02:39:56,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231592981] [2023-08-31 02:39:56,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:56,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 02:39:56,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 02:39:56,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-31 02:39:56,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:56,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 83 transitions, 878 flow. Second operand has 22 states, 22 states have (on average 61.59090909090909) internal successors, (1355), 22 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:56,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:56,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:56,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:56,585 INFO L130 PetriNetUnfolder]: 141/308 cut-off events. [2023-08-31 02:39:56,585 INFO L131 PetriNetUnfolder]: For 2336/2336 co-relation queries the response was YES. [2023-08-31 02:39:56,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 308 events. 141/308 cut-off events. For 2336/2336 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1328 event pairs, 0 based on Foata normal form. 6/302 useless extension candidates. Maximal degree in co-relation 1887. Up to 185 conditions per place. [2023-08-31 02:39:56,587 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 57 selfloop transitions, 42 changer transitions 19/118 dead transitions. [2023-08-31 02:39:56,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 118 transitions, 1411 flow [2023-08-31 02:39:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 02:39:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 02:39:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1141 transitions. [2023-08-31 02:39:56,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41703216374269003 [2023-08-31 02:39:56,589 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1141 transitions. [2023-08-31 02:39:56,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1141 transitions. [2023-08-31 02:39:56,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:56,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1141 transitions. [2023-08-31 02:39:56,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 63.388888888888886) internal successors, (1141), 18 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:56,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 152.0) internal successors, (2888), 19 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:56,591 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 152.0) internal successors, (2888), 19 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:56,591 INFO L175 Difference]: Start difference. First operand has 247 places, 83 transitions, 878 flow. Second operand 18 states and 1141 transitions. [2023-08-31 02:39:56,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 118 transitions, 1411 flow [2023-08-31 02:39:56,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 118 transitions, 1085 flow, removed 77 selfloop flow, removed 38 redundant places. [2023-08-31 02:39:56,598 INFO L231 Difference]: Finished difference. Result has 125 places, 86 transitions, 731 flow [2023-08-31 02:39:56,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=731, PETRI_PLACES=125, PETRI_TRANSITIONS=86} [2023-08-31 02:39:56,598 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-08-31 02:39:56,598 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 86 transitions, 731 flow [2023-08-31 02:39:56,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.59090909090909) internal successors, (1355), 22 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:56,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:39:56,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:39:56,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-31 02:39:56,799 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 [2023-08-31 02:39:56,799 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:39:56,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:39:56,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1359978278, now seen corresponding path program 14 times [2023-08-31 02:39:56,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:39:56,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623619477] [2023-08-31 02:39:56,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:39:56,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:39:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:39:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:56,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:39:56,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623619477] [2023-08-31 02:39:56,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623619477] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:39:56,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648374834] [2023-08-31 02:39:56,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:39:56,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:39:56,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:39:56,933 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) [2023-08-31 02:39:56,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-31 02:39:56,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:39:56,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:39:56,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 02:39:56,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:39:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:39:57,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:39:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:39:57,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648374834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:39:57,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:39:57,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-08-31 02:39:57,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597959927] [2023-08-31 02:39:57,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:39:57,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 02:39:57,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:39:57,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 02:39:57,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-31 02:39:57,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 152 [2023-08-31 02:39:57,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 86 transitions, 731 flow. Second operand has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:57,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:39:57,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 152 [2023-08-31 02:39:57,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:39:57,609 INFO L130 PetriNetUnfolder]: 133/259 cut-off events. [2023-08-31 02:39:57,609 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2023-08-31 02:39:57,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1398 conditions, 259 events. 133/259 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 952 event pairs, 0 based on Foata normal form. 3/258 useless extension candidates. Maximal degree in co-relation 1358. Up to 99 conditions per place. [2023-08-31 02:39:57,610 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 0 selfloop transitions, 0 changer transitions 114/114 dead transitions. [2023-08-31 02:39:57,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 114 transitions, 1142 flow [2023-08-31 02:39:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 02:39:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 02:39:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1008 transitions. [2023-08-31 02:39:57,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2023-08-31 02:39:57,611 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1008 transitions. [2023-08-31 02:39:57,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1008 transitions. [2023-08-31 02:39:57,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:39:57,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1008 transitions. [2023-08-31 02:39:57,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 63.0) internal successors, (1008), 16 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:57,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:57,613 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:57,613 INFO L175 Difference]: Start difference. First operand has 125 places, 86 transitions, 731 flow. Second operand 16 states and 1008 transitions. [2023-08-31 02:39:57,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 114 transitions, 1142 flow [2023-08-31 02:39:57,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 114 transitions, 1038 flow, removed 13 selfloop flow, removed 16 redundant places. [2023-08-31 02:39:57,616 INFO L231 Difference]: Finished difference. Result has 114 places, 0 transitions, 0 flow [2023-08-31 02:39:57,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=114, PETRI_TRANSITIONS=0} [2023-08-31 02:39:57,617 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 94 predicate places. [2023-08-31 02:39:57,617 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 0 transitions, 0 flow [2023-08-31 02:39:57,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.7) internal successors, (1234), 20 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:39:57,619 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-31 02:39:57,619 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-31 02:39:57,619 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-31 02:39:57,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-31 02:39:57,823 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 [2023-08-31 02:39:57,824 INFO L445 BasicCegarLoop]: Path program histogram: [20, 14, 6] [2023-08-31 02:39:57,826 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 02:39:57,826 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 02:39:57,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 02:39:57 BasicIcfg [2023-08-31 02:39:57,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 02:39:57,828 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 02:39:57,828 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 02:39:57,828 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 02:39:57,829 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:38:56" (3/4) ... [2023-08-31 02:39:57,831 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-31 02:39:57,834 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-31 02:39:57,834 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-31 02:39:57,838 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-08-31 02:39:57,838 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-31 02:39:57,838 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-31 02:39:57,838 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-31 02:39:57,856 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-31 02:39:57,857 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 02:39:57,857 INFO L158 Benchmark]: Toolchain (without parser) took 61921.04ms. Allocated memory was 96.5MB in the beginning and 360.7MB in the end (delta: 264.2MB). Free memory was 77.2MB in the beginning and 213.0MB in the end (delta: -135.9MB). Peak memory consumption was 128.2MB. Max. memory is 16.1GB. [2023-08-31 02:39:57,857 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 65.0MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 02:39:57,857 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.79ms. Allocated memory is still 96.5MB. Free memory was 77.2MB in the beginning and 66.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-31 02:39:57,858 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.59ms. Allocated memory is still 96.5MB. Free memory was 66.3MB in the beginning and 64.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 02:39:57,858 INFO L158 Benchmark]: Boogie Preprocessor took 32.31ms. Allocated memory is still 96.5MB. Free memory was 64.5MB in the beginning and 63.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 02:39:57,858 INFO L158 Benchmark]: RCFGBuilder took 325.64ms. Allocated memory is still 96.5MB. Free memory was 63.4MB in the beginning and 49.2MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-08-31 02:39:57,858 INFO L158 Benchmark]: TraceAbstraction took 61301.16ms. Allocated memory was 96.5MB in the beginning and 360.7MB in the end (delta: 264.2MB). Free memory was 48.7MB in the beginning and 215.9MB in the end (delta: -167.2MB). Peak memory consumption was 98.8MB. Max. memory is 16.1GB. [2023-08-31 02:39:57,858 INFO L158 Benchmark]: Witness Printer took 28.57ms. Allocated memory is still 360.7MB. Free memory was 215.9MB in the beginning and 213.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 02:39:57,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 65.0MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 194.79ms. Allocated memory is still 96.5MB. Free memory was 77.2MB in the beginning and 66.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.59ms. Allocated memory is still 96.5MB. Free memory was 66.3MB in the beginning and 64.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.31ms. Allocated memory is still 96.5MB. Free memory was 64.5MB in the beginning and 63.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 325.64ms. Allocated memory is still 96.5MB. Free memory was 63.4MB in the beginning and 49.2MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 61301.16ms. Allocated memory was 96.5MB in the beginning and 360.7MB in the end (delta: 264.2MB). Free memory was 48.7MB in the beginning and 215.9MB in the end (delta: -167.2MB). Peak memory consumption was 98.8MB. Max. memory is 16.1GB. * Witness Printer took 28.57ms. Allocated memory is still 360.7MB. Free memory was 215.9MB in the beginning and 213.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 75 PlacesBefore, 20 PlacesAfterwards, 74 TransitionsBefore, 15 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 6 FixpointIterations, 37 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 68 TotalNumberOfCompositions, 559 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 539, independent: 535, independent conditional: 0, independent unconditional: 535, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 279, independent: 277, independent conditional: 0, independent unconditional: 277, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 539, independent: 258, independent conditional: 0, independent unconditional: 258, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 279, unknown conditional: 0, unknown unconditional: 279] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 99 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 61.2s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 34.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9038 SdHoareTripleChecker+Valid, 14.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8567 mSDsluCounter, 3670 SdHoareTripleChecker+Invalid, 11.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3493 mSDsCounter, 975 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35590 IncrementalHoareTripleChecker+Invalid, 36565 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 975 mSolverCounterUnsat, 177 mSDtfsCounter, 35590 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1942 GetRequests, 544 SyntacticMatches, 51 SemanticMatches, 1347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16179 ImplicationChecksByTransitivity, 21.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4207occurred in iteration=37, InterpolantAutomatonStates: 909, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 15.3s InterpolantComputationTime, 1140 NumberOfCodeBlocks, 1140 NumberOfCodeBlocksAsserted, 110 NumberOfCheckSat, 1563 ConstructedInterpolants, 0 QuantifiedInterpolants, 19719 SizeOfPredicates, 138 NumberOfNonLiveVariables, 4304 ConjunctsInSsa, 879 ConjunctsInUnsatCore, 108 InterpolantComputations, 6 PerfectInterpolantSequences, 23/438 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-31 02:39:57,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE