./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive-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-send-receive-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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --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 03:48:03,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:48:03,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:48:03,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:48:03,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:48:03,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:48:03,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:48:03,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:48:03,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:48:03,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:48:03,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:48:03,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:48:03,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:48:03,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:48:03,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:48:03,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:48:03,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:48:03,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:48:03,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:48:03,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:48:03,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:48:03,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:48:03,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:48:03,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:48:03,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:48:03,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:48:03,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:48:03,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:48:03,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:48:03,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:48:03,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:48:03,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:48:03,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:48:03,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:48:03,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:48:03,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:48:03,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:48:03,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:48:03,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:48:03,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:48:03,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:48:03,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:48:03,430 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:48:03,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:48:03,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:48:03,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:48:03,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:48:03,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:48:03,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:48:03,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:48:03,433 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:48:03,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:48:03,433 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:48:03,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:48:03,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:48:03,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:48:03,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:48:03,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:48:03,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:48:03,435 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:48:03,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:48:03,436 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:48:03,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:48:03,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:48:03,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:48:03,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:48:03,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:48:03,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:48:03,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:48:03,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:48:03,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:48:03,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:48:03,439 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:48:03,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:48:03,440 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:48:03,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:48:03,440 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:48:03,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:48:03,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:48:03,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:48:03,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:48:03,793 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:48:03,794 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:48:03,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-31 03:48:05,088 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:48:05,295 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:48:05,296 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-31 03:48:05,302 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e58d9dc48/3f77706afa0f44c2bc101ac0610637e0/FLAG085ca539d [2023-08-31 03:48:05,317 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e58d9dc48/3f77706afa0f44c2bc101ac0610637e0 [2023-08-31 03:48:05,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:48:05,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:48:05,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:48:05,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:48:05,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:48:05,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c878150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05, skipping insertion in model container [2023-08-31 03:48:05,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:48:05,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:48:05,523 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-send-receive-alt.wvr.c[2650,2663] [2023-08-31 03:48:05,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:48:05,547 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:48:05,587 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-send-receive-alt.wvr.c[2650,2663] [2023-08-31 03:48:05,593 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:48:05,602 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:48:05,602 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:48:05,608 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:48:05,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05 WrapperNode [2023-08-31 03:48:05,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:48:05,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:48:05,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:48:05,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:48:05,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,666 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 147 [2023-08-31 03:48:05,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:48:05,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:48:05,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:48:05,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:48:05,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,710 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:48:05,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:48:05,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:48:05,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:48:05,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (1/1) ... [2023-08-31 03:48:05,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:48:05,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:05,799 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 03:48:05,808 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 03:48:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:48:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:48:05,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:48:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:48:05,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:48:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:48:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:48:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:48:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:48:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:48:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 03:48:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:48:05,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:48:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:48:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:48:05,841 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 03:48:05,989 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:48:05,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:48:06,263 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:48:06,351 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:48:06,355 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 03:48:06,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:48:06 BoogieIcfgContainer [2023-08-31 03:48:06,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:48:06,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:48:06,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:48:06,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:48:06,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:48:05" (1/3) ... [2023-08-31 03:48:06,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c7d29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:48:06, skipping insertion in model container [2023-08-31 03:48:06,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:48:05" (2/3) ... [2023-08-31 03:48:06,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c7d29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:48:06, skipping insertion in model container [2023-08-31 03:48:06,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:48:06" (3/3) ... [2023-08-31 03:48:06,367 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-08-31 03:48:06,374 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:48:06,382 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:48:06,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:48:06,382 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:48:06,460 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 03:48:06,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 127 transitions, 270 flow [2023-08-31 03:48:06,590 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2023-08-31 03:48:06,590 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:48:06,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-08-31 03:48:06,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 127 transitions, 270 flow [2023-08-31 03:48:06,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 117 transitions, 246 flow [2023-08-31 03:48:06,613 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:48:06,628 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 117 transitions, 246 flow [2023-08-31 03:48:06,631 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 117 transitions, 246 flow [2023-08-31 03:48:06,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 117 transitions, 246 flow [2023-08-31 03:48:06,667 INFO L130 PetriNetUnfolder]: 11/117 cut-off events. [2023-08-31 03:48:06,668 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:48:06,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 11/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-08-31 03:48:06,671 INFO L119 LiptonReduction]: Number of co-enabled transitions 792 [2023-08-31 03:48:11,164 INFO L134 LiptonReduction]: Checked pairs total: 883 [2023-08-31 03:48:11,164 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-31 03:48:11,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:48:11,184 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;@32093669, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:48:11,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 03:48:11,189 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-08-31 03:48:11,190 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:48:11,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:11,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:11,191 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 03:48:11,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:11,196 INFO L85 PathProgramCache]: Analyzing trace with hash -238231372, now seen corresponding path program 1 times [2023-08-31 03:48:11,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:11,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248256192] [2023-08-31 03:48:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:11,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:11,625 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 03:48:11,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:11,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248256192] [2023-08-31 03:48:11,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248256192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:48:11,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:48:11,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 03:48:11,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54669044] [2023-08-31 03:48:11,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:48:11,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 03:48:11,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:11,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 03:48:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 03:48:11,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 257 [2023-08-31 03:48:11,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 03:48:11,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:11,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 257 [2023-08-31 03:48:11,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:11,771 INFO L130 PetriNetUnfolder]: 64/113 cut-off events. [2023-08-31 03:48:11,771 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 03:48:11,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 332 event pairs, 13 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2023-08-31 03:48:11,775 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2023-08-31 03:48:11,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2023-08-31 03:48:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 03:48:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 03:48:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-31 03:48:11,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656290531776913 [2023-08-31 03:48:11,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-31 03:48:11,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-31 03:48:11,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:11,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-31 03:48:11,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 03:48:11,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states 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 03:48:11,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states 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 03:48:11,810 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 359 transitions. [2023-08-31 03:48:11,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2023-08-31 03:48:11,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 03:48:11,814 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2023-08-31 03:48:11,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-08-31 03:48:11,818 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-31 03:48:11,819 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2023-08-31 03:48:11,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 03:48:11,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:11,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:11,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:48:11,820 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 03:48:11,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:11,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1359864469, now seen corresponding path program 1 times [2023-08-31 03:48:11,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:11,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838101327] [2023-08-31 03:48:11,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:11,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:11,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:11,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838101327] [2023-08-31 03:48:11,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838101327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:48:11,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:48:11,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 03:48:11,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763559501] [2023-08-31 03:48:11,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:48:11,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 03:48:11,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:11,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 03:48:11,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 03:48:11,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 257 [2023-08-31 03:48:11,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 03:48:11,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:11,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 257 [2023-08-31 03:48:11,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:12,009 INFO L130 PetriNetUnfolder]: 48/96 cut-off events. [2023-08-31 03:48:12,010 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-31 03:48:12,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 230 event pairs, 15 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2023-08-31 03:48:12,011 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2023-08-31 03:48:12,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2023-08-31 03:48:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 03:48:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 03:48:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-08-31 03:48:12,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44228274967574577 [2023-08-31 03:48:12,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-08-31 03:48:12,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-08-31 03:48:12,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:12,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-08-31 03:48:12,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states 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 03:48:12,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states 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 03:48:12,022 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states 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 03:48:12,022 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 341 transitions. [2023-08-31 03:48:12,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2023-08-31 03:48:12,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:48:12,024 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2023-08-31 03:48:12,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-31 03:48:12,025 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-08-31 03:48:12,025 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2023-08-31 03:48:12,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 03:48:12,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:12,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:12,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:48:12,026 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 03:48:12,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:12,029 INFO L85 PathProgramCache]: Analyzing trace with hash 210856546, now seen corresponding path program 1 times [2023-08-31 03:48:12,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:12,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856909120] [2023-08-31 03:48:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:12,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:48:12,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:12,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856909120] [2023-08-31 03:48:12,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856909120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:48:12,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:48:12,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:48:12,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976084594] [2023-08-31 03:48:12,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:48:12,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:48:12,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:12,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:48:12,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:48:12,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 257 [2023-08-31 03:48:12,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states 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 03:48:12,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:12,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 257 [2023-08-31 03:48:12,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:12,294 INFO L130 PetriNetUnfolder]: 57/126 cut-off events. [2023-08-31 03:48:12,295 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-31 03:48:12,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 400 event pairs, 40 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2023-08-31 03:48:12,296 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-08-31 03:48:12,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2023-08-31 03:48:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:48:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:48:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 451 transitions. [2023-08-31 03:48:12,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438715953307393 [2023-08-31 03:48:12,299 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 451 transitions. [2023-08-31 03:48:12,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 451 transitions. [2023-08-31 03:48:12,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:12,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 451 transitions. [2023-08-31 03:48:12,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states 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 03:48:12,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states 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 03:48:12,303 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states 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 03:48:12,303 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 451 transitions. [2023-08-31 03:48:12,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2023-08-31 03:48:12,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 03:48:12,305 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2023-08-31 03:48:12,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-08-31 03:48:12,307 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-31 03:48:12,310 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2023-08-31 03:48:12,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states 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 03:48:12,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:12,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 03:48:12,311 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 03:48:12,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash -961979074, now seen corresponding path program 1 times [2023-08-31 03:48:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:12,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528090497] [2023-08-31 03:48:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:12,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:13,190 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 03:48:13,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:13,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528090497] [2023-08-31 03:48:13,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528090497] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:13,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322242056] [2023-08-31 03:48:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:13,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:13,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:13,197 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 03:48:13,204 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 03:48:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:13,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 03:48:13,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:13,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:48:13,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:48:13,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:48:13,758 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 03:48:13,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:14,174 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~back~0) (let ((.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ c_~sum~0 (select .cse0 .cse1)) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse3 .cse2) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse1)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-08-31 03:48:14,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:14,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-31 03:48:14,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:14,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 292 [2023-08-31 03:48:14,275 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:14,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 92 [2023-08-31 03:48:14,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:14,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 79 [2023-08-31 03:48:14,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:14,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-31 03:48:14,547 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:48:14,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 136 [2023-08-31 03:48:14,566 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:48:14,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 112 [2023-08-31 03:48:14,585 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 03:48:14,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2023-08-31 03:48:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-31 03:48:14,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322242056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:14,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:14,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-08-31 03:48:14,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903005552] [2023-08-31 03:48:14,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:14,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:48:14,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:14,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:48:14,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=4, NotChecked=36, Total=420 [2023-08-31 03:48:14,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-08-31 03:48:14,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states 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 03:48:14,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:14,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-08-31 03:48:14,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:16,116 INFO L130 PetriNetUnfolder]: 171/351 cut-off events. [2023-08-31 03:48:16,117 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-31 03:48:16,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 351 events. 171/351 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1451 event pairs, 30 based on Foata normal form. 12/359 useless extension candidates. Maximal degree in co-relation 829. Up to 101 conditions per place. [2023-08-31 03:48:16,119 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 31 selfloop transitions, 15 changer transitions 56/102 dead transitions. [2023-08-31 03:48:16,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 102 transitions, 503 flow [2023-08-31 03:48:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 03:48:16,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 03:48:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1294 transitions. [2023-08-31 03:48:16,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29617761501487755 [2023-08-31 03:48:16,125 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1294 transitions. [2023-08-31 03:48:16,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1294 transitions. [2023-08-31 03:48:16,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:16,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1294 transitions. [2023-08-31 03:48:16,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 76.11764705882354) internal successors, (1294), 17 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states 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 03:48:16,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states 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 03:48:16,137 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states 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 03:48:16,138 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 17 states and 1294 transitions. [2023-08-31 03:48:16,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 102 transitions, 503 flow [2023-08-31 03:48:16,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 102 transitions, 491 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-31 03:48:16,141 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 167 flow [2023-08-31 03:48:16,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=167, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-31 03:48:16,142 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2023-08-31 03:48:16,142 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 167 flow [2023-08-31 03:48:16,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states 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 03:48:16,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:16,143 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:16,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 03:48:16,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:16,352 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 03:48:16,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:16,352 INFO L85 PathProgramCache]: Analyzing trace with hash -438286575, now seen corresponding path program 2 times [2023-08-31 03:48:16,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:16,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334589049] [2023-08-31 03:48:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:16,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:48:16,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:16,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334589049] [2023-08-31 03:48:16,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334589049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:16,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757088009] [2023-08-31 03:48:16,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:48:16,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:16,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:16,518 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 03:48:16,523 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 03:48:16,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:48:16,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:48:16,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:48:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:16,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 86 [2023-08-31 03:48:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:48:16,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:16,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 96 [2023-08-31 03:48:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:48:16,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757088009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:16,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:16,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2023-08-31 03:48:16,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882362956] [2023-08-31 03:48:16,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:16,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 03:48:16,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:16,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 03:48:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-31 03:48:16,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 257 [2023-08-31 03:48:16,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 167 flow. Second operand has 7 states, 7 states have (on average 111.85714285714286) internal successors, (783), 7 states have internal predecessors, (783), 0 states have call successors, (0), 0 states 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 03:48:16,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:16,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 257 [2023-08-31 03:48:16,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:16,995 INFO L130 PetriNetUnfolder]: 198/396 cut-off events. [2023-08-31 03:48:16,996 INFO L131 PetriNetUnfolder]: For 274/276 co-relation queries the response was YES. [2023-08-31 03:48:16,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 396 events. 198/396 cut-off events. For 274/276 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1665 event pairs, 55 based on Foata normal form. 8/392 useless extension candidates. Maximal degree in co-relation 562. Up to 142 conditions per place. [2023-08-31 03:48:16,999 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 38 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-08-31 03:48:16,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 352 flow [2023-08-31 03:48:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:48:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:48:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 465 transitions. [2023-08-31 03:48:17,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45233463035019456 [2023-08-31 03:48:17,002 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 465 transitions. [2023-08-31 03:48:17,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 465 transitions. [2023-08-31 03:48:17,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:17,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 465 transitions. [2023-08-31 03:48:17,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 03:48:17,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states 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 03:48:17,006 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states 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 03:48:17,006 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 167 flow. Second operand 4 states and 465 transitions. [2023-08-31 03:48:17,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 352 flow [2023-08-31 03:48:17,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 329 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-31 03:48:17,013 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 245 flow [2023-08-31 03:48:17,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-31 03:48:17,016 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-08-31 03:48:17,016 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 245 flow [2023-08-31 03:48:17,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.85714285714286) internal successors, (783), 7 states have internal predecessors, (783), 0 states have call successors, (0), 0 states 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 03:48:17,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:17,017 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:17,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:48:17,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:17,224 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 03:48:17,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:17,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1347002828, now seen corresponding path program 3 times [2023-08-31 03:48:17,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:17,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200311398] [2023-08-31 03:48:17,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:17,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:18,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200311398] [2023-08-31 03:48:18,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200311398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130042160] [2023-08-31 03:48:18,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:48:18,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:18,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:18,647 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 03:48:18,676 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 03:48:18,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:48:18,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:48:18,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-31 03:48:18,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:48:18,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:19,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:19,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2023-08-31 03:48:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:48:19,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130042160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:19,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:19,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2023-08-31 03:48:19,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348412181] [2023-08-31 03:48:19,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:19,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:48:19,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:48:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:48:19,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 257 [2023-08-31 03:48:19,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 245 flow. Second operand has 22 states, 22 states have (on average 93.13636363636364) internal successors, (2049), 22 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states 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 03:48:19,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:19,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 257 [2023-08-31 03:48:19,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:20,472 INFO L130 PetriNetUnfolder]: 313/613 cut-off events. [2023-08-31 03:48:20,473 INFO L131 PetriNetUnfolder]: For 727/727 co-relation queries the response was YES. [2023-08-31 03:48:20,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1952 conditions, 613 events. 313/613 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2862 event pairs, 36 based on Foata normal form. 3/616 useless extension candidates. Maximal degree in co-relation 958. Up to 174 conditions per place. [2023-08-31 03:48:20,476 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 49 selfloop transitions, 25 changer transitions 44/118 dead transitions. [2023-08-31 03:48:20,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 118 transitions, 780 flow [2023-08-31 03:48:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 03:48:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 03:48:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1561 transitions. [2023-08-31 03:48:20,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37962062256809337 [2023-08-31 03:48:20,481 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1561 transitions. [2023-08-31 03:48:20,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1561 transitions. [2023-08-31 03:48:20,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:20,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1561 transitions. [2023-08-31 03:48:20,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 97.5625) internal successors, (1561), 16 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 03:48:20,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states 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 03:48:20,492 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states 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 03:48:20,492 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 245 flow. Second operand 16 states and 1561 transitions. [2023-08-31 03:48:20,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 118 transitions, 780 flow [2023-08-31 03:48:20,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 118 transitions, 750 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-31 03:48:20,498 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 378 flow [2023-08-31 03:48:20,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=378, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-08-31 03:48:20,499 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-08-31 03:48:20,499 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 378 flow [2023-08-31 03:48:20,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 93.13636363636364) internal successors, (2049), 22 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states 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 03:48:20,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:20,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:20,508 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 03:48:20,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:20,706 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 03:48:20,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash -218673542, now seen corresponding path program 4 times [2023-08-31 03:48:20,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:20,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728992210] [2023-08-31 03:48:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:20,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728992210] [2023-08-31 03:48:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728992210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:21,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219053078] [2023-08-31 03:48:21,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:48:21,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:21,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:21,746 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 03:48:21,749 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 03:48:21,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:48:21,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:48:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 03:48:21,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:48:22,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:22,357 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:48:22,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 170 [2023-08-31 03:48:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:48:22,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219053078] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:22,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:22,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 21 [2023-08-31 03:48:22,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146017671] [2023-08-31 03:48:22,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:22,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:48:22,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:22,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:48:22,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:48:23,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 257 [2023-08-31 03:48:23,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 378 flow. Second operand has 23 states, 23 states have (on average 93.21739130434783) internal successors, (2144), 23 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:23,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:23,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 257 [2023-08-31 03:48:23,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:24,445 INFO L130 PetriNetUnfolder]: 441/846 cut-off events. [2023-08-31 03:48:24,445 INFO L131 PetriNetUnfolder]: For 1366/1366 co-relation queries the response was YES. [2023-08-31 03:48:24,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2774 conditions, 846 events. 441/846 cut-off events. For 1366/1366 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4210 event pairs, 20 based on Foata normal form. 2/848 useless extension candidates. Maximal degree in co-relation 2087. Up to 186 conditions per place. [2023-08-31 03:48:24,450 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 63 selfloop transitions, 35 changer transitions 63/161 dead transitions. [2023-08-31 03:48:24,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 161 transitions, 1136 flow [2023-08-31 03:48:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 03:48:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 03:48:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2055 transitions. [2023-08-31 03:48:24,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3807670928293496 [2023-08-31 03:48:24,457 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2055 transitions. [2023-08-31 03:48:24,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2055 transitions. [2023-08-31 03:48:24,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:24,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2055 transitions. [2023-08-31 03:48:24,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 97.85714285714286) internal successors, (2055), 21 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states 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 03:48:24,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states 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 03:48:24,471 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states 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 03:48:24,471 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 378 flow. Second operand 21 states and 2055 transitions. [2023-08-31 03:48:24,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 161 transitions, 1136 flow [2023-08-31 03:48:24,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 161 transitions, 1078 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-08-31 03:48:24,478 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 560 flow [2023-08-31 03:48:24,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=560, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2023-08-31 03:48:24,480 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-08-31 03:48:24,480 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 560 flow [2023-08-31 03:48:24,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 93.21739130434783) internal successors, (2144), 23 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:24,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:24,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:24,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:48:24,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:24,690 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 03:48:24,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash -417535956, now seen corresponding path program 5 times [2023-08-31 03:48:24,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:24,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680492780] [2023-08-31 03:48:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:24,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:25,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:25,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680492780] [2023-08-31 03:48:25,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680492780] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:25,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646657339] [2023-08-31 03:48:25,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:48:25,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:25,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:25,820 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 03:48:25,843 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 03:48:25,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:48:25,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:48:25,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 03:48:25,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:26,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:26,637 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-31 03:48:26,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 170 [2023-08-31 03:48:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:27,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646657339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:27,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:27,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-08-31 03:48:27,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99179800] [2023-08-31 03:48:27,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:27,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:48:27,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:27,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:48:27,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:48:28,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 257 [2023-08-31 03:48:28,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 560 flow. Second operand has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states 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 03:48:28,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:28,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 257 [2023-08-31 03:48:28,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:29,244 INFO L130 PetriNetUnfolder]: 569/1117 cut-off events. [2023-08-31 03:48:29,244 INFO L131 PetriNetUnfolder]: For 2192/2192 co-relation queries the response was YES. [2023-08-31 03:48:29,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3764 conditions, 1117 events. 569/1117 cut-off events. For 2192/2192 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6077 event pairs, 72 based on Foata normal form. 41/1158 useless extension candidates. Maximal degree in co-relation 3572. Up to 228 conditions per place. [2023-08-31 03:48:29,251 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 62 selfloop transitions, 33 changer transitions 63/158 dead transitions. [2023-08-31 03:48:29,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 158 transitions, 1263 flow [2023-08-31 03:48:29,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 03:48:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 03:48:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1822 transitions. [2023-08-31 03:48:29,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37313127175916444 [2023-08-31 03:48:29,257 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1822 transitions. [2023-08-31 03:48:29,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1822 transitions. [2023-08-31 03:48:29,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:29,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1822 transitions. [2023-08-31 03:48:29,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 95.89473684210526) internal successors, (1822), 19 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:48:29,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states 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 03:48:29,270 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states 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 03:48:29,271 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 560 flow. Second operand 19 states and 1822 transitions. [2023-08-31 03:48:29,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 158 transitions, 1263 flow [2023-08-31 03:48:29,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 158 transitions, 1123 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-08-31 03:48:29,283 INFO L231 Difference]: Finished difference. Result has 92 places, 63 transitions, 612 flow [2023-08-31 03:48:29,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=612, PETRI_PLACES=92, PETRI_TRANSITIONS=63} [2023-08-31 03:48:29,285 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-31 03:48:29,285 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 63 transitions, 612 flow [2023-08-31 03:48:29,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.85714285714286) internal successors, (2544), 28 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states 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 03:48:29,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:29,287 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:29,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:48:29,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:29,493 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 03:48:29,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:29,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1104904085, now seen corresponding path program 6 times [2023-08-31 03:48:29,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:29,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207603868] [2023-08-31 03:48:29,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:48:29,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:29,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207603868] [2023-08-31 03:48:29,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207603868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:29,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339416184] [2023-08-31 03:48:29,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:48:29,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:29,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:29,730 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 03:48:29,732 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 03:48:29,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:48:29,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:48:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:48:29,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:29,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:48:29,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 108 [2023-08-31 03:48:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:48:30,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:30,250 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 03:48:30,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 126 [2023-08-31 03:48:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:48:30,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339416184] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:30,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:30,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2023-08-31 03:48:30,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052477889] [2023-08-31 03:48:30,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:30,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:48:30,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:48:30,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:48:30,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 257 [2023-08-31 03:48:30,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 63 transitions, 612 flow. Second operand has 18 states, 18 states have (on average 98.5) internal successors, (1773), 18 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states 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 03:48:30,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:30,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 257 [2023-08-31 03:48:30,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:31,025 INFO L130 PetriNetUnfolder]: 899/1721 cut-off events. [2023-08-31 03:48:31,026 INFO L131 PetriNetUnfolder]: For 6557/6557 co-relation queries the response was YES. [2023-08-31 03:48:31,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6677 conditions, 1721 events. 899/1721 cut-off events. For 6557/6557 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10263 event pairs, 134 based on Foata normal form. 20/1729 useless extension candidates. Maximal degree in co-relation 5965. Up to 515 conditions per place. [2023-08-31 03:48:31,037 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 69 selfloop transitions, 47 changer transitions 39/158 dead transitions. [2023-08-31 03:48:31,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 158 transitions, 1502 flow [2023-08-31 03:48:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 03:48:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 03:48:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1542 transitions. [2023-08-31 03:48:31,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-08-31 03:48:31,042 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1542 transitions. [2023-08-31 03:48:31,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1542 transitions. [2023-08-31 03:48:31,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:31,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1542 transitions. [2023-08-31 03:48:31,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 102.8) internal successors, (1542), 15 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states 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 03:48:31,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states 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 03:48:31,054 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states 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 03:48:31,054 INFO L175 Difference]: Start difference. First operand has 92 places, 63 transitions, 612 flow. Second operand 15 states and 1542 transitions. [2023-08-31 03:48:31,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 158 transitions, 1502 flow [2023-08-31 03:48:31,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 158 transitions, 1409 flow, removed 23 selfloop flow, removed 13 redundant places. [2023-08-31 03:48:31,074 INFO L231 Difference]: Finished difference. Result has 92 places, 84 transitions, 1000 flow [2023-08-31 03:48:31,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1000, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2023-08-31 03:48:31,075 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-31 03:48:31,075 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 1000 flow [2023-08-31 03:48:31,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 98.5) internal successors, (1773), 18 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states 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 03:48:31,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:31,076 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:31,085 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 03:48:31,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:31,283 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 03:48:31,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:31,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1313718566, now seen corresponding path program 7 times [2023-08-31 03:48:31,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:31,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886717964] [2023-08-31 03:48:31,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:31,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:32,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:32,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886717964] [2023-08-31 03:48:32,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886717964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:32,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954888086] [2023-08-31 03:48:32,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:48:32,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:32,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:32,713 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 03:48:32,738 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 03:48:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:32,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-31 03:48:32,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:33,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:33,900 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-31 03:48:33,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-31 03:48:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:34,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954888086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:34,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:34,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-08-31 03:48:34,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548462949] [2023-08-31 03:48:34,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:34,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-31 03:48:34,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:34,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-31 03:48:34,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2023-08-31 03:48:36,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 257 [2023-08-31 03:48:36,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 1000 flow. Second operand has 38 states, 38 states have (on average 90.55263157894737) internal successors, (3441), 38 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states 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 03:48:36,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:36,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 257 [2023-08-31 03:48:36,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:47,475 INFO L130 PetriNetUnfolder]: 3356/6261 cut-off events. [2023-08-31 03:48:47,475 INFO L131 PetriNetUnfolder]: For 35857/35857 co-relation queries the response was YES. [2023-08-31 03:48:47,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28714 conditions, 6261 events. 3356/6261 cut-off events. For 35857/35857 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46527 event pairs, 313 based on Foata normal form. 125/6386 useless extension candidates. Maximal degree in co-relation 26164. Up to 1789 conditions per place. [2023-08-31 03:48:47,514 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 338 selfloop transitions, 256 changer transitions 261/855 dead transitions. [2023-08-31 03:48:47,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 855 transitions, 8885 flow [2023-08-31 03:48:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-31 03:48:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-31 03:48:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 8477 transitions. [2023-08-31 03:48:47,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37913144595017667 [2023-08-31 03:48:47,528 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 8477 transitions. [2023-08-31 03:48:47,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 8477 transitions. [2023-08-31 03:48:47,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:47,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 8477 transitions. [2023-08-31 03:48:47,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 97.4367816091954) internal successors, (8477), 87 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states 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 03:48:47,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 0 states have call successors, (0), 0 states 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 03:48:47,626 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 0 states have call successors, (0), 0 states 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 03:48:47,626 INFO L175 Difference]: Start difference. First operand has 92 places, 84 transitions, 1000 flow. Second operand 87 states and 8477 transitions. [2023-08-31 03:48:47,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 855 transitions, 8885 flow [2023-08-31 03:48:47,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 855 transitions, 7509 flow, removed 684 selfloop flow, removed 7 redundant places. [2023-08-31 03:48:47,719 INFO L231 Difference]: Finished difference. Result has 226 places, 336 transitions, 5485 flow [2023-08-31 03:48:47,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=5485, PETRI_PLACES=226, PETRI_TRANSITIONS=336} [2023-08-31 03:48:47,720 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-08-31 03:48:47,721 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 336 transitions, 5485 flow [2023-08-31 03:48:47,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 90.55263157894737) internal successors, (3441), 38 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states 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 03:48:47,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:47,722 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:47,732 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 03:48:47,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:47,933 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 03:48:47,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1326553260, now seen corresponding path program 8 times [2023-08-31 03:48:47,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:47,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532234484] [2023-08-31 03:48:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:47,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:49,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:49,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532234484] [2023-08-31 03:48:49,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532234484] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:49,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68444292] [2023-08-31 03:48:49,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:48:49,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:49,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:49,346 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 03:48:49,350 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 03:48:49,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:48:49,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:48:49,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 03:48:49,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:48:49,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:48:50,520 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-31 03:48:50,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 264 treesize of output 230 [2023-08-31 03:48:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:48:51,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68444292] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:48:51,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:48:51,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 29 [2023-08-31 03:48:51,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449318692] [2023-08-31 03:48:51,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:48:51,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 03:48:51,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:48:51,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 03:48:51,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-08-31 03:48:52,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 257 [2023-08-31 03:48:52,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 336 transitions, 5485 flow. Second operand has 31 states, 31 states have (on average 92.87096774193549) internal successors, (2879), 31 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states 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 03:48:52,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:48:52,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 257 [2023-08-31 03:48:52,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:48:55,966 INFO L130 PetriNetUnfolder]: 3862/7194 cut-off events. [2023-08-31 03:48:55,966 INFO L131 PetriNetUnfolder]: For 175517/175517 co-relation queries the response was YES. [2023-08-31 03:48:56,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33674 conditions, 7194 events. 3862/7194 cut-off events. For 175517/175517 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 54494 event pairs, 997 based on Foata normal form. 49/7243 useless extension candidates. Maximal degree in co-relation 31360. Up to 4109 conditions per place. [2023-08-31 03:48:56,036 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 322 selfloop transitions, 143 changer transitions 135/600 dead transitions. [2023-08-31 03:48:56,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 600 transitions, 8658 flow [2023-08-31 03:48:56,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 03:48:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 03:48:56,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3440 transitions. [2023-08-31 03:48:56,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38243468593663144 [2023-08-31 03:48:56,042 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3440 transitions. [2023-08-31 03:48:56,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3440 transitions. [2023-08-31 03:48:56,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:48:56,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3440 transitions. [2023-08-31 03:48:56,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 98.28571428571429) internal successors, (3440), 35 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states 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 03:48:56,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 257.0) internal successors, (9252), 36 states have internal predecessors, (9252), 0 states have call successors, (0), 0 states 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 03:48:56,056 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 257.0) internal successors, (9252), 36 states have internal predecessors, (9252), 0 states have call successors, (0), 0 states 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 03:48:56,056 INFO L175 Difference]: Start difference. First operand has 226 places, 336 transitions, 5485 flow. Second operand 35 states and 3440 transitions. [2023-08-31 03:48:56,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 600 transitions, 8658 flow [2023-08-31 03:48:56,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 600 transitions, 6342 flow, removed 1138 selfloop flow, removed 8 redundant places. [2023-08-31 03:48:56,776 INFO L231 Difference]: Finished difference. Result has 268 places, 381 transitions, 4894 flow [2023-08-31 03:48:56,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4894, PETRI_PLACES=268, PETRI_TRANSITIONS=381} [2023-08-31 03:48:56,777 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2023-08-31 03:48:56,777 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 381 transitions, 4894 flow [2023-08-31 03:48:56,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 92.87096774193549) internal successors, (2879), 31 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states 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 03:48:56,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:48:56,778 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:48:56,784 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 03:48:56,980 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,SelfDestructingSolverStorable10 [2023-08-31 03:48:56,980 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 03:48:56,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:48:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash -283334480, now seen corresponding path program 9 times [2023-08-31 03:48:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:48:56,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677565745] [2023-08-31 03:48:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:48:56,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:48:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:48:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:58,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:48:58,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677565745] [2023-08-31 03:48:58,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677565745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:48:58,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351549225] [2023-08-31 03:48:58,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:48:58,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:48:58,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:48:58,581 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 03:48:58,604 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 03:48:58,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:48:58,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:48:58,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-31 03:48:58,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:48:58,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 03:48:58,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:48:58,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:48:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:48:59,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:00,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:00,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-08-31 03:49:00,859 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-31 03:49:00,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 378 [2023-08-31 03:49:00,923 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-31 03:49:00,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 298 [2023-08-31 03:49:00,997 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-31 03:49:00,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 229 [2023-08-31 03:49:05,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:05,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-08-31 03:49:05,887 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-31 03:49:05,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 700 [2023-08-31 03:49:05,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:49:05,912 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:49:05,913 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:49:05,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:49:05,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:49:05,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 216 [2023-08-31 03:49:05,948 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-31 03:49:05,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 187 [2023-08-31 03:49:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:06,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351549225] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:06,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:06,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-08-31 03:49:06,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010062054] [2023-08-31 03:49:06,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:06,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-31 03:49:06,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:06,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-31 03:49:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1115, Unknown=4, NotChecked=0, Total=1482 [2023-08-31 03:49:07,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-08-31 03:49:07,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 381 transitions, 4894 flow. Second operand has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states 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 03:49:07,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:07,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-08-31 03:49:07,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:12,321 INFO L130 PetriNetUnfolder]: 3863/7211 cut-off events. [2023-08-31 03:49:12,322 INFO L131 PetriNetUnfolder]: For 193350/193350 co-relation queries the response was YES. [2023-08-31 03:49:12,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31131 conditions, 7211 events. 3863/7211 cut-off events. For 193350/193350 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 54119 event pairs, 1430 based on Foata normal form. 31/7242 useless extension candidates. Maximal degree in co-relation 30589. Up to 5735 conditions per place. [2023-08-31 03:49:12,501 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 389 selfloop transitions, 93 changer transitions 98/580 dead transitions. [2023-08-31 03:49:12,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 580 transitions, 7321 flow [2023-08-31 03:49:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-31 03:49:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-31 03:49:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2908 transitions. [2023-08-31 03:49:12,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29776776571779645 [2023-08-31 03:49:12,506 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2908 transitions. [2023-08-31 03:49:12,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2908 transitions. [2023-08-31 03:49:12,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:12,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2908 transitions. [2023-08-31 03:49:12,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 76.52631578947368) internal successors, (2908), 38 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states 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 03:49:12,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 257.0) internal successors, (10023), 39 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states 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 03:49:12,519 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 257.0) internal successors, (10023), 39 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states 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 03:49:12,519 INFO L175 Difference]: Start difference. First operand has 268 places, 381 transitions, 4894 flow. Second operand 38 states and 2908 transitions. [2023-08-31 03:49:12,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 580 transitions, 7321 flow [2023-08-31 03:49:13,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 580 transitions, 6710 flow, removed 223 selfloop flow, removed 24 redundant places. [2023-08-31 03:49:13,487 INFO L231 Difference]: Finished difference. Result has 294 places, 407 transitions, 5009 flow [2023-08-31 03:49:13,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3962, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5009, PETRI_PLACES=294, PETRI_TRANSITIONS=407} [2023-08-31 03:49:13,488 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 274 predicate places. [2023-08-31 03:49:13,489 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 407 transitions, 5009 flow [2023-08-31 03:49:13,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states 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 03:49:13,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:13,489 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:13,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-31 03:49:13,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:13,690 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 03:49:13,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:13,691 INFO L85 PathProgramCache]: Analyzing trace with hash 600606014, now seen corresponding path program 10 times [2023-08-31 03:49:13,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:13,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416997265] [2023-08-31 03:49:13,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:13,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:16,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:16,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416997265] [2023-08-31 03:49:16,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416997265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:16,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257612089] [2023-08-31 03:49:16,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:49:16,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:16,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:16,210 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 03:49:16,213 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 03:49:16,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:49:16,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:16,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 03:49:16,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:49:16,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:17,422 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-31 03:49:17,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 264 treesize of output 230 [2023-08-31 03:49:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:49:18,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257612089] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:18,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:18,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 32 [2023-08-31 03:49:18,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333686048] [2023-08-31 03:49:18,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:18,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 03:49:18,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:18,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 03:49:18,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2023-08-31 03:49:19,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 257 [2023-08-31 03:49:19,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 407 transitions, 5009 flow. Second operand has 34 states, 34 states have (on average 90.79411764705883) internal successors, (3087), 34 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states 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 03:49:19,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:19,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 257 [2023-08-31 03:49:19,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:25,882 INFO L130 PetriNetUnfolder]: 5799/10763 cut-off events. [2023-08-31 03:49:25,882 INFO L131 PetriNetUnfolder]: For 337153/337153 co-relation queries the response was YES. [2023-08-31 03:49:25,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44026 conditions, 10763 events. 5799/10763 cut-off events. For 337153/337153 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 86101 event pairs, 1113 based on Foata normal form. 60/10823 useless extension candidates. Maximal degree in co-relation 41359. Up to 3694 conditions per place. [2023-08-31 03:49:25,986 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 390 selfloop transitions, 333 changer transitions 174/897 dead transitions. [2023-08-31 03:49:25,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 897 transitions, 10714 flow [2023-08-31 03:49:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-31 03:49:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-31 03:49:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4639 transitions. [2023-08-31 03:49:25,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3760538261997406 [2023-08-31 03:49:25,992 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4639 transitions. [2023-08-31 03:49:25,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4639 transitions. [2023-08-31 03:49:25,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:25,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4639 transitions. [2023-08-31 03:49:25,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 96.64583333333333) internal successors, (4639), 48 states have internal predecessors, (4639), 0 states have call successors, (0), 0 states 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 03:49:26,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 257.0) internal successors, (12593), 49 states have internal predecessors, (12593), 0 states have call successors, (0), 0 states 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 03:49:26,010 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 257.0) internal successors, (12593), 49 states have internal predecessors, (12593), 0 states have call successors, (0), 0 states 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 03:49:26,010 INFO L175 Difference]: Start difference. First operand has 294 places, 407 transitions, 5009 flow. Second operand 48 states and 4639 transitions. [2023-08-31 03:49:26,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 897 transitions, 10714 flow [2023-08-31 03:49:27,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 897 transitions, 10281 flow, removed 185 selfloop flow, removed 16 redundant places. [2023-08-31 03:49:27,254 INFO L231 Difference]: Finished difference. Result has 351 places, 575 transitions, 8243 flow [2023-08-31 03:49:27,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=4651, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=8243, PETRI_PLACES=351, PETRI_TRANSITIONS=575} [2023-08-31 03:49:27,254 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 331 predicate places. [2023-08-31 03:49:27,255 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 575 transitions, 8243 flow [2023-08-31 03:49:27,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 90.79411764705883) internal successors, (3087), 34 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states 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 03:49:27,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:27,256 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:27,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-31 03:49:27,456 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,SelfDestructingSolverStorable12 [2023-08-31 03:49:27,456 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 03:49:27,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:27,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2116468834, now seen corresponding path program 11 times [2023-08-31 03:49:27,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:27,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037417209] [2023-08-31 03:49:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:27,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 03:49:27,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:27,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037417209] [2023-08-31 03:49:27,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037417209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:27,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263769867] [2023-08-31 03:49:27,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:49:27,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:27,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:27,721 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 03:49:27,744 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 03:49:27,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 03:49:27,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:27,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 03:49:27,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:49:28,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:49:28,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263769867] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:28,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:28,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-31 03:49:28,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278723817] [2023-08-31 03:49:28,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:28,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 03:49:28,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:28,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 03:49:28,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2023-08-31 03:49:28,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 257 [2023-08-31 03:49:28,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 575 transitions, 8243 flow. Second operand has 29 states, 29 states have (on average 99.0) internal successors, (2871), 29 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states 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 03:49:28,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:28,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 257 [2023-08-31 03:49:28,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:30,942 INFO L130 PetriNetUnfolder]: 2651/5001 cut-off events. [2023-08-31 03:49:30,942 INFO L131 PetriNetUnfolder]: For 97156/97156 co-relation queries the response was YES. [2023-08-31 03:49:30,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25234 conditions, 5001 events. 2651/5001 cut-off events. For 97156/97156 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 35537 event pairs, 1755 based on Foata normal form. 52/5053 useless extension candidates. Maximal degree in co-relation 24929. Up to 4531 conditions per place. [2023-08-31 03:49:30,992 INFO L137 encePairwiseOnDemand]: 251/257 looper letters, 242 selfloop transitions, 5 changer transitions 87/334 dead transitions. [2023-08-31 03:49:30,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 334 transitions, 5441 flow [2023-08-31 03:49:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 03:49:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 03:49:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1754 transitions. [2023-08-31 03:49:30,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014648661020829 [2023-08-31 03:49:30,995 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1754 transitions. [2023-08-31 03:49:30,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1754 transitions. [2023-08-31 03:49:30,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:30,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1754 transitions. [2023-08-31 03:49:30,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.17647058823529) internal successors, (1754), 17 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states 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 03:49:31,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states 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 03:49:31,002 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 257.0) internal successors, (4626), 18 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states 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 03:49:31,002 INFO L175 Difference]: Start difference. First operand has 351 places, 575 transitions, 8243 flow. Second operand 17 states and 1754 transitions. [2023-08-31 03:49:31,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 334 transitions, 5441 flow [2023-08-31 03:49:31,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 334 transitions, 4645 flow, removed 280 selfloop flow, removed 89 redundant places. [2023-08-31 03:49:31,675 INFO L231 Difference]: Finished difference. Result has 217 places, 247 transitions, 3522 flow [2023-08-31 03:49:31,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3822, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3522, PETRI_PLACES=217, PETRI_TRANSITIONS=247} [2023-08-31 03:49:31,676 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-08-31 03:49:31,676 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 247 transitions, 3522 flow [2023-08-31 03:49:31,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 99.0) internal successors, (2871), 29 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states 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 03:49:31,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:31,677 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:31,683 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 03:49:31,877 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,SelfDestructingSolverStorable13 [2023-08-31 03:49:31,877 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 03:49:31,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:31,878 INFO L85 PathProgramCache]: Analyzing trace with hash 550463705, now seen corresponding path program 12 times [2023-08-31 03:49:31,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:31,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520358485] [2023-08-31 03:49:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:31,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:33,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520358485] [2023-08-31 03:49:33,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520358485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91238339] [2023-08-31 03:49:33,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:49:33,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:33,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:33,859 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 03:49:33,861 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 03:49:34,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:49:34,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:34,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-31 03:49:34,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:34,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:35,521 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-31 03:49:35,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-31 03:49:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:37,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91238339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:37,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:37,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 42 [2023-08-31 03:49:37,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027025598] [2023-08-31 03:49:37,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:37,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-31 03:49:37,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:37,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-31 03:49:37,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2023-08-31 03:49:39,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 257 [2023-08-31 03:49:39,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 247 transitions, 3522 flow. Second operand has 44 states, 44 states have (on average 85.52272727272727) internal successors, (3763), 44 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:39,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:39,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 257 [2023-08-31 03:49:39,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:58,086 INFO L130 PetriNetUnfolder]: 6410/12085 cut-off events. [2023-08-31 03:49:58,087 INFO L131 PetriNetUnfolder]: For 176308/176308 co-relation queries the response was YES. [2023-08-31 03:49:58,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59823 conditions, 12085 events. 6410/12085 cut-off events. For 176308/176308 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 98501 event pairs, 1142 based on Foata normal form. 392/12477 useless extension candidates. Maximal degree in co-relation 59730. Up to 3699 conditions per place. [2023-08-31 03:49:58,185 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 621 selfloop transitions, 412 changer transitions 459/1492 dead transitions. [2023-08-31 03:49:58,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1492 transitions, 18310 flow [2023-08-31 03:49:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2023-08-31 03:49:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2023-08-31 03:49:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 13275 transitions. [2023-08-31 03:49:58,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35870622568093385 [2023-08-31 03:49:58,206 INFO L72 ComplementDD]: Start complementDD. Operand 144 states and 13275 transitions. [2023-08-31 03:49:58,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 144 states and 13275 transitions. [2023-08-31 03:49:58,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:58,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 144 states and 13275 transitions. [2023-08-31 03:49:58,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 145 states, 144 states have (on average 92.1875) internal successors, (13275), 144 states have internal predecessors, (13275), 0 states have call successors, (0), 0 states 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 03:49:58,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 145 states, 145 states have (on average 257.0) internal successors, (37265), 145 states have internal predecessors, (37265), 0 states have call successors, (0), 0 states 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 03:49:58,272 INFO L81 ComplementDD]: Finished complementDD. Result has 145 states, 145 states have (on average 257.0) internal successors, (37265), 145 states have internal predecessors, (37265), 0 states have call successors, (0), 0 states 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 03:49:58,272 INFO L175 Difference]: Start difference. First operand has 217 places, 247 transitions, 3522 flow. Second operand 144 states and 13275 transitions. [2023-08-31 03:49:58,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1492 transitions, 18310 flow [2023-08-31 03:49:58,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1492 transitions, 17740 flow, removed 266 selfloop flow, removed 15 redundant places. [2023-08-31 03:49:58,845 INFO L231 Difference]: Finished difference. Result has 388 places, 622 transitions, 12371 flow [2023-08-31 03:49:58,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=144, PETRI_FLOW=12371, PETRI_PLACES=388, PETRI_TRANSITIONS=622} [2023-08-31 03:49:58,846 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 368 predicate places. [2023-08-31 03:49:58,846 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 622 transitions, 12371 flow [2023-08-31 03:49:58,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 85.52272727272727) internal successors, (3763), 44 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:58,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:58,847 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:58,852 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 03:49:59,047 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,SelfDestructingSolverStorable14 [2023-08-31 03:49:59,048 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 03:49:59,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:59,048 INFO L85 PathProgramCache]: Analyzing trace with hash 435785617, now seen corresponding path program 13 times [2023-08-31 03:49:59,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:59,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898619536] [2023-08-31 03:49:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:59,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:49:59,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:59,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898619536] [2023-08-31 03:49:59,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898619536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:59,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689971345] [2023-08-31 03:49:59,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:49:59,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:59,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:59,332 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 03:49:59,337 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 03:49:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:59,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:49:59,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:59,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:49:59,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 226 treesize of output 140 [2023-08-31 03:49:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:49:59,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:00,197 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-31 03:50:00,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 260 treesize of output 176 [2023-08-31 03:50:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 03:50:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689971345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:00,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:00,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2023-08-31 03:50:00,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951979182] [2023-08-31 03:50:00,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:00,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 03:50:00,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 03:50:00,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2023-08-31 03:50:00,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 257 [2023-08-31 03:50:00,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 622 transitions, 12371 flow. Second operand has 17 states, 17 states have (on average 101.41176470588235) internal successors, (1724), 17 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states 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 03:50:00,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:00,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 257 [2023-08-31 03:50:00,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:04,711 INFO L130 PetriNetUnfolder]: 8402/15845 cut-off events. [2023-08-31 03:50:04,711 INFO L131 PetriNetUnfolder]: For 421652/421652 co-relation queries the response was YES. [2023-08-31 03:50:04,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90259 conditions, 15845 events. 8402/15845 cut-off events. For 421652/421652 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 136050 event pairs, 1858 based on Foata normal form. 64/15909 useless extension candidates. Maximal degree in co-relation 88842. Up to 7532 conditions per place. [2023-08-31 03:50:04,984 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 454 selfloop transitions, 421 changer transitions 16/891 dead transitions. [2023-08-31 03:50:04,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 891 transitions, 20109 flow [2023-08-31 03:50:04,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 03:50:04,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 03:50:04,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1505 transitions. [2023-08-31 03:50:04,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182879377431907 [2023-08-31 03:50:04,986 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1505 transitions. [2023-08-31 03:50:04,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1505 transitions. [2023-08-31 03:50:04,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:04,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1505 transitions. [2023-08-31 03:50:04,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 107.5) internal successors, (1505), 14 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states 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 03:50:04,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 257.0) internal successors, (3855), 15 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states 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 03:50:04,991 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 257.0) internal successors, (3855), 15 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states 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 03:50:04,991 INFO L175 Difference]: Start difference. First operand has 388 places, 622 transitions, 12371 flow. Second operand 14 states and 1505 transitions. [2023-08-31 03:50:04,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 891 transitions, 20109 flow [2023-08-31 03:50:09,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 891 transitions, 15318 flow, removed 2353 selfloop flow, removed 24 redundant places. [2023-08-31 03:50:09,069 INFO L231 Difference]: Finished difference. Result has 383 places, 809 transitions, 13450 flow [2023-08-31 03:50:09,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=8577, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13450, PETRI_PLACES=383, PETRI_TRANSITIONS=809} [2023-08-31 03:50:09,070 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 363 predicate places. [2023-08-31 03:50:09,070 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 809 transitions, 13450 flow [2023-08-31 03:50:09,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 101.41176470588235) internal successors, (1724), 17 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states 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 03:50:09,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:09,071 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:09,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:09,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 03:50:09,272 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 03:50:09,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:09,272 INFO L85 PathProgramCache]: Analyzing trace with hash 530970796, now seen corresponding path program 14 times [2023-08-31 03:50:09,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:09,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108567014] [2023-08-31 03:50:09,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:09,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:11,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:11,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108567014] [2023-08-31 03:50:11,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108567014] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:11,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975445265] [2023-08-31 03:50:11,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:50:11,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:11,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:11,172 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 03:50:11,173 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 03:50:11,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:50:11,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:11,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-31 03:50:11,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:11,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:50:11,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:50:11,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:50:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:12,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:13,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:50:13,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-08-31 03:50:13,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:50:13,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 1050 [2023-08-31 03:50:13,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:50:13,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 340 treesize of output 438 [2023-08-31 03:50:13,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:50:13,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 383 [2023-08-31 03:50:36,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:50:36,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-08-31 03:50:36,753 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-31 03:50:36,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 914 [2023-08-31 03:50:36,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:50:36,782 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:50:36,782 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:50:36,783 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:50:36,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:50:36,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:50:36,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 03:50:36,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 340 treesize of output 286 [2023-08-31 03:50:36,834 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-31 03:50:36,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 247 [2023-08-31 03:50:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:50:37,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975445265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:37,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:37,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2023-08-31 03:50:37,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988862464] [2023-08-31 03:50:37,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:37,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-31 03:50:37,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-31 03:50:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1964, Unknown=3, NotChecked=0, Total=2352 [2023-08-31 03:50:38,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-08-31 03:50:38,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 809 transitions, 13450 flow. Second operand has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states 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 03:50:38,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:38,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-08-31 03:50:38,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:51:11,653 INFO L130 PetriNetUnfolder]: 20260/37630 cut-off events. [2023-08-31 03:51:11,654 INFO L131 PetriNetUnfolder]: For 1536639/1536639 co-relation queries the response was YES. [2023-08-31 03:51:12,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213092 conditions, 37630 events. 20260/37630 cut-off events. For 1536639/1536639 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 356851 event pairs, 3956 based on Foata normal form. 269/37899 useless extension candidates. Maximal degree in co-relation 211685. Up to 11440 conditions per place. [2023-08-31 03:51:12,794 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 1210 selfloop transitions, 1340 changer transitions 460/3010 dead transitions. [2023-08-31 03:51:12,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 3010 transitions, 55742 flow [2023-08-31 03:51:12,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2023-08-31 03:51:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2023-08-31 03:51:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 12840 transitions. [2023-08-31 03:51:12,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30464078959855745 [2023-08-31 03:51:12,811 INFO L72 ComplementDD]: Start complementDD. Operand 164 states and 12840 transitions. [2023-08-31 03:51:12,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 164 states and 12840 transitions. [2023-08-31 03:51:12,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:51:12,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 164 states and 12840 transitions. [2023-08-31 03:51:12,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 165 states, 164 states have (on average 78.29268292682927) internal successors, (12840), 164 states have internal predecessors, (12840), 0 states have call successors, (0), 0 states 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 03:51:12,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 165 states, 165 states have (on average 257.0) internal successors, (42405), 165 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states 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 03:51:12,868 INFO L81 ComplementDD]: Finished complementDD. Result has 165 states, 165 states have (on average 257.0) internal successors, (42405), 165 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states 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 03:51:12,869 INFO L175 Difference]: Start difference. First operand has 383 places, 809 transitions, 13450 flow. Second operand 164 states and 12840 transitions. [2023-08-31 03:51:12,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 3010 transitions, 55742 flow [2023-08-31 03:51:25,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 3010 transitions, 53192 flow, removed 1255 selfloop flow, removed 4 redundant places. [2023-08-31 03:51:25,152 INFO L231 Difference]: Finished difference. Result has 653 places, 2001 transitions, 43422 flow [2023-08-31 03:51:25,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=12774, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=164, PETRI_FLOW=43422, PETRI_PLACES=653, PETRI_TRANSITIONS=2001} [2023-08-31 03:51:25,154 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 633 predicate places. [2023-08-31 03:51:25,154 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 2001 transitions, 43422 flow [2023-08-31 03:51:25,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states 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 03:51:25,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:51:25,155 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:51:25,161 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 03:51:25,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:25,361 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 03:51:25,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:51:25,361 INFO L85 PathProgramCache]: Analyzing trace with hash 630946832, now seen corresponding path program 15 times [2023-08-31 03:51:25,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:51:25,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612419175] [2023-08-31 03:51:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:51:25,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:51:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:51:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:27,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:51:27,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612419175] [2023-08-31 03:51:27,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612419175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:51:27,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348150559] [2023-08-31 03:51:27,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:51:27,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:51:27,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:51:27,388 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 03:51:27,389 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 03:51:27,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:51:27,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:51:27,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-31 03:51:27,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:51:27,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 03:51:27,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:51:27,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 03:51:28,517 INFO L321 Elim1Store]: treesize reduction 196, result has 6.2 percent of original size [2023-08-31 03:51:28,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 36 [2023-08-31 03:51:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:28,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:51:33,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:51:33,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 156 [2023-08-31 03:51:33,496 INFO L321 Elim1Store]: treesize reduction 108, result has 46.3 percent of original size [2023-08-31 03:51:33,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1014 treesize of output 972 [2023-08-31 03:51:33,536 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,540 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,540 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,541 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,544 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,545 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,547 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,548 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,549 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,551 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,552 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,552 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 03:51:33,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:51:33,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 337 treesize of output 378 [2023-08-31 03:51:33,757 INFO L321 Elim1Store]: treesize reduction 108, result has 46.3 percent of original size [2023-08-31 03:51:33,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 333 treesize of output 323 [2023-08-31 03:51:42,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 03:51:42,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 156 [2023-08-31 03:51:42,993 INFO L321 Elim1Store]: treesize reduction 184, result has 8.5 percent of original size [2023-08-31 03:51:42,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 482 treesize of output 431 [2023-08-31 03:51:43,066 INFO L321 Elim1Store]: treesize reduction 184, result has 8.5 percent of original size [2023-08-31 03:51:43,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 415 treesize of output 329 [2023-08-31 03:51:43,136 INFO L321 Elim1Store]: treesize reduction 184, result has 8.5 percent of original size [2023-08-31 03:51:43,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 282 treesize of output 247 [2023-08-31 03:51:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:51:43,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348150559] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:51:43,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:51:43,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2023-08-31 03:51:43,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024695586] [2023-08-31 03:51:43,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:51:43,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-31 03:51:43,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:51:43,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-31 03:51:43,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=1853, Unknown=5, NotChecked=0, Total=2352 [2023-08-31 03:51:46,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-08-31 03:51:46,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 2001 transitions, 43422 flow. Second operand has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states 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 03:51:46,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:51:46,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-08-31 03:51:46,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:52:07,035 WARN L222 SmtUtils]: Spent 19.80s on a formula simplification. DAG size of input: 247 DAG size of output: 241 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:52:23,297 WARN L222 SmtUtils]: Spent 11.64s on a formula simplification. DAG size of input: 246 DAG size of output: 241 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:52:30,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:52:34,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:52:42,486 WARN L222 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 215 DAG size of output: 213 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:52:47,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:52:51,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:53:01,892 WARN L222 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 154 DAG size of output: 133 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:53:12,802 WARN L222 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 170 DAG size of output: 168 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:53:20,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:53:21,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:53:29,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:53:32,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 03:53:45,208 WARN L222 SmtUtils]: Spent 7.92s on a formula simplification. DAG size of input: 162 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:53:52,241 WARN L222 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 162 DAG size of output: 160 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:54:00,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:16,421 WARN L222 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 205 DAG size of output: 203 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:54:18,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:22,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:54:31,087 WARN L222 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:54:41,650 WARN L222 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 161 DAG size of output: 153 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:54:58,122 WARN L222 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 113 DAG size of output: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:55:03,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:55:06,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:55:08,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:55:10,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:55:12,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:55:14,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:55:22,370 WARN L222 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 222 DAG size of output: 212 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:55:38,564 WARN L222 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 196 DAG size of output: 165 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:56:00,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:56:02,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:56:09,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:56:11,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:56:14,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:56:35,121 WARN L222 SmtUtils]: Spent 20.90s on a formula simplification. DAG size of input: 188 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:56:37,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:56:39,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:57:02,841 WARN L222 SmtUtils]: Spent 10.87s on a formula simplification. DAG size of input: 163 DAG size of output: 157 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:57:16,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:57:21,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:57:26,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:57:28,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:57:30,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:57:41,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:57:49,686 WARN L222 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 116 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:58:05,153 WARN L222 SmtUtils]: Spent 8.16s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:58:18,923 WARN L222 SmtUtils]: Spent 7.58s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:58:36,282 WARN L222 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 148 DAG size of output: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:58:43,587 WARN L222 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 196 DAG size of output: 155 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:58:51,498 WARN L222 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 199 DAG size of output: 160 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:58:53,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:58:55,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:58:58,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:59:00,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:59:02,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:59:04,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:59:08,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:59:10,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:59:12,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:59:14,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:59:25,243 WARN L222 SmtUtils]: Spent 9.33s on a formula simplification. DAG size of input: 153 DAG size of output: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:59:36,772 WARN L222 SmtUtils]: Spent 9.50s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 03:59:45,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 03:59:48,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:00:06,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:00:08,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:00:10,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:00:20,955 WARN L222 SmtUtils]: Spent 9.07s on a formula simplification. DAG size of input: 223 DAG size of output: 221 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:00:33,581 WARN L222 SmtUtils]: Spent 11.29s on a formula simplification. DAG size of input: 194 DAG size of output: 155 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:00:44,434 WARN L222 SmtUtils]: Spent 10.28s on a formula simplification. DAG size of input: 189 DAG size of output: 154 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:00:53,555 WARN L222 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 138 DAG size of output: 117 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:00:56,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:01:08,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:01:10,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:01:21,780 WARN L222 SmtUtils]: Spent 11.24s on a formula simplification. DAG size of input: 141 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15