./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.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 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 19:59:51,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:59:51,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:59:51,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:59:51,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:59:51,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:59:51,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:59:51,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:59:51,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:59:51,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:59:51,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:59:51,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:59:51,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:59:51,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:59:51,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:59:51,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:59:51,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:59:51,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:59:51,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:59:51,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:59:51,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:59:51,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:59:51,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:59:51,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:59:51,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:59:51,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:59:51,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:59:51,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:59:51,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:59:51,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:59:51,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:59:51,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:59:51,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:59:51,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:59:51,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:59:51,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:59:51,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:59:51,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:59:51,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:59:51,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:59:51,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:59:51,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:59:51,386 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:59:51,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:59:51,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:59:51,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:59:51,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:59:51,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:59:51,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:59:51,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:59:51,394 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:59:51,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:59:51,395 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:59:51,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:59:51,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:59:51,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:59:51,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:59:51,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:59:51,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:59:51,397 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:59:51,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:59:51,397 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:59:51,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:59:51,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:59:51,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:59:51,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:59:51,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:59:51,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:59:51,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:59:51,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:59:51,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:59:51,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:59:51,399 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:59:51,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:59:51,399 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:59:51,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:59:51,400 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:59:51,400 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:59:51,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:59:51,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:59:51,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:59:51,720 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:59:51,720 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:59:51,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-30 19:59:52,912 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:59:53,070 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:59:53,071 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-30 19:59:53,075 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4358e8b0a/ea05319a7e714c3e96752b7a57a24f79/FLAG4e674ec6f [2023-08-30 19:59:53,086 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4358e8b0a/ea05319a7e714c3e96752b7a57a24f79 [2023-08-30 19:59:53,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:59:53,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:59:53,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:59:53,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:59:53,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:59:53,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d4e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53, skipping insertion in model container [2023-08-30 19:59:53,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:59:53,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:59:53,252 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-bad-dot-product.wvr.c[2865,2878] [2023-08-30 19:59:53,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:59:53,268 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:59:53,288 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-bad-dot-product.wvr.c[2865,2878] [2023-08-30 19:59:53,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:59:53,302 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:59:53,302 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:59:53,308 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:59:53,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53 WrapperNode [2023-08-30 19:59:53,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:59:53,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:59:53,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:59:53,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:59:53,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,367 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 280 [2023-08-30 19:59:53,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:59:53,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:59:53,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:59:53,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:59:53,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,415 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:59:53,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:59:53,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:59:53,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:59:53,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (1/1) ... [2023-08-30 19:59:53,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:59:53,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:59:53,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 19:59:53,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 19:59:53,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:59:53,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:59:53,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:59:53,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:59:53,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:59:53,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:59:53,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:59:53,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:59:53,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:59:53,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:59:53,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:59:53,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:59:53,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:59:53,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:59:53,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:59:53,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:59:53,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:59:53,483 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 19:59:53,575 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:59:53,577 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:59:53,965 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:59:54,125 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:59:54,128 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-30 19:59:54,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:59:54 BoogieIcfgContainer [2023-08-30 19:59:54,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:59:54,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:59:54,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:59:54,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:59:54,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:59:53" (1/3) ... [2023-08-30 19:59:54,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fee91a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:59:54, skipping insertion in model container [2023-08-30 19:59:54,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:59:53" (2/3) ... [2023-08-30 19:59:54,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fee91a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:59:54, skipping insertion in model container [2023-08-30 19:59:54,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:59:54" (3/3) ... [2023-08-30 19:59:54,137 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-08-30 19:59:54,142 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:59:54,149 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:59:54,150 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:59:54,150 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:59:54,241 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 19:59:54,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 239 transitions, 502 flow [2023-08-30 19:59:54,431 INFO L130 PetriNetUnfolder]: 25/236 cut-off events. [2023-08-30 19:59:54,431 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:59:54,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 236 events. 25/236 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 310 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 182. Up to 2 conditions per place. [2023-08-30 19:59:54,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 239 transitions, 502 flow [2023-08-30 19:59:54,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 226 transitions, 470 flow [2023-08-30 19:59:54,446 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:59:54,453 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 226 transitions, 470 flow [2023-08-30 19:59:54,456 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 226 transitions, 470 flow [2023-08-30 19:59:54,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 226 transitions, 470 flow [2023-08-30 19:59:54,497 INFO L130 PetriNetUnfolder]: 25/226 cut-off events. [2023-08-30 19:59:54,498 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 19:59:54,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 25/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 307 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 182. Up to 2 conditions per place. [2023-08-30 19:59:54,503 INFO L119 LiptonReduction]: Number of co-enabled transitions 6720 [2023-08-30 20:00:00,818 INFO L134 LiptonReduction]: Checked pairs total: 7402 [2023-08-30 20:00:00,818 INFO L136 LiptonReduction]: Total number of compositions: 236 [2023-08-30 20:00:00,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:00:00,834 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;@615a9b00, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:00:00,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 20:00:00,840 INFO L130 PetriNetUnfolder]: 8/33 cut-off events. [2023-08-30 20:00:00,841 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:00:00,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:00,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:00,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:00,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1808989783, now seen corresponding path program 1 times [2023-08-30 20:00:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:00,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880899191] [2023-08-30 20:00:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:00,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:01,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:01,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880899191] [2023-08-30 20:00:01,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880899191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:01,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:01,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:00:01,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173054172] [2023-08-30 20:00:01,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:01,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:00:01,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:01,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:00:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:00:01,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 475 [2023-08-30 20:00:01,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:01,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:01,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 475 [2023-08-30 20:00:01,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:01,630 INFO L130 PetriNetUnfolder]: 1162/1537 cut-off events. [2023-08-30 20:00:01,630 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2023-08-30 20:00:01,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 1537 events. 1162/1537 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5522 event pairs, 394 based on Foata normal form. 0/1016 useless extension candidates. Maximal degree in co-relation 2710. Up to 899 conditions per place. [2023-08-30 20:00:01,640 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 44 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-30 20:00:01,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 220 flow [2023-08-30 20:00:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:00:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:00:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 869 transitions. [2023-08-30 20:00:01,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573684210526316 [2023-08-30 20:00:01,656 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 869 transitions. [2023-08-30 20:00:01,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 869 transitions. [2023-08-30 20:00:01,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:01,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 869 transitions. [2023-08-30 20:00:01,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:01,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 475.0) internal successors, (2375), 5 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:01,672 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 475.0) internal successors, (2375), 5 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:01,674 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 4 states and 869 transitions. [2023-08-30 20:00:01,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 220 flow [2023-08-30 20:00:01,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 20:00:01,680 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2023-08-30 20:00:01,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-08-30 20:00:01,684 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-08-30 20:00:01,685 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2023-08-30 20:00:01,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:01,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:01,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:01,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:00:01,686 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:01,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:01,687 INFO L85 PathProgramCache]: Analyzing trace with hash -120965922, now seen corresponding path program 1 times [2023-08-30 20:00:01,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:01,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365894123] [2023-08-30 20:00:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:01,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:00:01,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:01,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365894123] [2023-08-30 20:00:01,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365894123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:01,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:01,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 20:00:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346012611] [2023-08-30 20:00:01,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:01,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:00:01,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:01,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:00:01,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:00:01,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 475 [2023-08-30 20:00:01,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:01,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:01,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 475 [2023-08-30 20:00:01,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:02,173 INFO L130 PetriNetUnfolder]: 1930/2561 cut-off events. [2023-08-30 20:00:02,173 INFO L131 PetriNetUnfolder]: For 392/570 co-relation queries the response was YES. [2023-08-30 20:00:02,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5940 conditions, 2561 events. 1930/2561 cut-off events. For 392/570 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10098 event pairs, 519 based on Foata normal form. 179/2075 useless extension candidates. Maximal degree in co-relation 1614. Up to 1436 conditions per place. [2023-08-30 20:00:02,185 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 52 selfloop transitions, 4 changer transitions 1/60 dead transitions. [2023-08-30 20:00:02,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 276 flow [2023-08-30 20:00:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:00:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:00:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-08-30 20:00:02,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48140350877192983 [2023-08-30 20:00:02,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-08-30 20:00:02,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-08-30 20:00:02,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:02,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-08-30 20:00:02,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:02,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 475.0) internal successors, (1900), 4 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:02,193 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 475.0) internal successors, (1900), 4 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:02,193 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 95 flow. Second operand 3 states and 686 transitions. [2023-08-30 20:00:02,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 276 flow [2023-08-30 20:00:02,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 20:00:02,197 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 117 flow [2023-08-30 20:00:02,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2023-08-30 20:00:02,198 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-30 20:00:02,198 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 117 flow [2023-08-30 20:00:02,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:02,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:02,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:02,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:00:02,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:02,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:02,200 INFO L85 PathProgramCache]: Analyzing trace with hash 568274986, now seen corresponding path program 1 times [2023-08-30 20:00:02,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:02,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270695069] [2023-08-30 20:00:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:02,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:02,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:02,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270695069] [2023-08-30 20:00:02,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270695069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:02,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:02,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:00:02,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612563332] [2023-08-30 20:00:02,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:02,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:00:02,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:02,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:00:02,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:00:02,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 475 [2023-08-30 20:00:02,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 196.4) internal successors, (982), 5 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:02,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:02,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 475 [2023-08-30 20:00:02,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:03,084 INFO L130 PetriNetUnfolder]: 4453/5922 cut-off events. [2023-08-30 20:00:03,085 INFO L131 PetriNetUnfolder]: For 1504/1504 co-relation queries the response was YES. [2023-08-30 20:00:03,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14415 conditions, 5922 events. 4453/5922 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 26577 event pairs, 2338 based on Foata normal form. 122/4506 useless extension candidates. Maximal degree in co-relation 6160. Up to 3038 conditions per place. [2023-08-30 20:00:03,135 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 78 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-08-30 20:00:03,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 86 transitions, 426 flow [2023-08-30 20:00:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:00:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:00:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1036 transitions. [2023-08-30 20:00:03,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362105263157895 [2023-08-30 20:00:03,139 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1036 transitions. [2023-08-30 20:00:03,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1036 transitions. [2023-08-30 20:00:03,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:03,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1036 transitions. [2023-08-30 20:00:03,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.2) internal successors, (1036), 5 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:03,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:03,147 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:03,147 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 117 flow. Second operand 5 states and 1036 transitions. [2023-08-30 20:00:03,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 86 transitions, 426 flow [2023-08-30 20:00:03,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 86 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:00:03,157 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 169 flow [2023-08-30 20:00:03,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-08-30 20:00:03,158 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2023-08-30 20:00:03,158 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 169 flow [2023-08-30 20:00:03,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.4) internal successors, (982), 5 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:03,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:03,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:03,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 20:00:03,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:03,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:03,160 INFO L85 PathProgramCache]: Analyzing trace with hash 637640884, now seen corresponding path program 1 times [2023-08-30 20:00:03,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:03,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528521164] [2023-08-30 20:00:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:03,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:03,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:03,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528521164] [2023-08-30 20:00:03,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528521164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:03,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556383225] [2023-08-30 20:00:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:03,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:03,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:03,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:03,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:00:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:03,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 20:00:03,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:03,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:03,694 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 23 treesize of output 7 [2023-08-30 20:00:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:03,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556383225] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:03,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:03,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-08-30 20:00:03,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676191378] [2023-08-30 20:00:03,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:03,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:00:03,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:03,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:00:03,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:00:04,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 475 [2023-08-30 20:00:04,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 169 flow. Second operand has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:04,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:04,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 475 [2023-08-30 20:00:04,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:05,180 INFO L130 PetriNetUnfolder]: 6603/8803 cut-off events. [2023-08-30 20:00:05,180 INFO L131 PetriNetUnfolder]: For 3446/3446 co-relation queries the response was YES. [2023-08-30 20:00:05,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22508 conditions, 8803 events. 6603/8803 cut-off events. For 3446/3446 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42366 event pairs, 3381 based on Foata normal form. 122/6628 useless extension candidates. Maximal degree in co-relation 14940. Up to 3038 conditions per place. [2023-08-30 20:00:05,227 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 121 selfloop transitions, 11 changer transitions 0/134 dead transitions. [2023-08-30 20:00:05,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 134 transitions, 697 flow [2023-08-30 20:00:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:00:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:00:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1615 transitions. [2023-08-30 20:00:05,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2023-08-30 20:00:05,232 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1615 transitions. [2023-08-30 20:00:05,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1615 transitions. [2023-08-30 20:00:05,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:05,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1615 transitions. [2023-08-30 20:00:05,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 201.875) internal successors, (1615), 8 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:05,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:05,244 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:05,244 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 169 flow. Second operand 8 states and 1615 transitions. [2023-08-30 20:00:05,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 134 transitions, 697 flow [2023-08-30 20:00:05,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 134 transitions, 693 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:00:05,264 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 241 flow [2023-08-30 20:00:05,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=241, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-08-30 20:00:05,265 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2023-08-30 20:00:05,265 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 241 flow [2023-08-30 20:00:05,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:05,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:05,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:05,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:05,481 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 [2023-08-30 20:00:05,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:05,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash -963449330, now seen corresponding path program 2 times [2023-08-30 20:00:05,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:05,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310571164] [2023-08-30 20:00:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:05,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:00:05,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:05,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310571164] [2023-08-30 20:00:05,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310571164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:05,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:05,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:00:05,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258410430] [2023-08-30 20:00:05,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:05,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:00:05,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:05,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:00:05,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:00:05,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 475 [2023-08-30 20:00:05,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:05,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:05,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 475 [2023-08-30 20:00:05,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:06,642 INFO L130 PetriNetUnfolder]: 6604/8808 cut-off events. [2023-08-30 20:00:06,643 INFO L131 PetriNetUnfolder]: For 5547/5547 co-relation queries the response was YES. [2023-08-30 20:00:06,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24128 conditions, 8808 events. 6604/8808 cut-off events. For 5547/5547 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 42154 event pairs, 3131 based on Foata normal form. 3/6504 useless extension candidates. Maximal degree in co-relation 14672. Up to 7287 conditions per place. [2023-08-30 20:00:06,695 INFO L137 encePairwiseOnDemand]: 470/475 looper letters, 61 selfloop transitions, 3 changer transitions 4/70 dead transitions. [2023-08-30 20:00:06,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 447 flow [2023-08-30 20:00:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:00:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:00:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1031 transitions. [2023-08-30 20:00:06,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341052631578947 [2023-08-30 20:00:06,699 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1031 transitions. [2023-08-30 20:00:06,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1031 transitions. [2023-08-30 20:00:06,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:06,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1031 transitions. [2023-08-30 20:00:06,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:06,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:06,706 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:06,707 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 241 flow. Second operand 5 states and 1031 transitions. [2023-08-30 20:00:06,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 447 flow [2023-08-30 20:00:06,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 415 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-30 20:00:06,741 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 237 flow [2023-08-30 20:00:06,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-08-30 20:00:06,742 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2023-08-30 20:00:06,742 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 237 flow [2023-08-30 20:00:06,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:06,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:06,745 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:06,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 20:00:06,745 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:06,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:06,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1429325870, now seen corresponding path program 1 times [2023-08-30 20:00:06,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:06,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976122147] [2023-08-30 20:00:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:06,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 20:00:06,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:06,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976122147] [2023-08-30 20:00:06,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976122147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:06,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033135621] [2023-08-30 20:00:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:06,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:06,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:06,890 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:06,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:00:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:07,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:00:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 20:00:07,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-30 20:00:07,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033135621] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:07,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:00:07,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-30 20:00:07,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078464152] [2023-08-30 20:00:07,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:07,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:00:07,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:00:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:00:07,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 475 [2023-08-30 20:00:07,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 198.8) internal successors, (994), 5 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:07,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:07,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 475 [2023-08-30 20:00:07,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:07,788 INFO L130 PetriNetUnfolder]: 5990/8152 cut-off events. [2023-08-30 20:00:07,789 INFO L131 PetriNetUnfolder]: For 8947/9589 co-relation queries the response was YES. [2023-08-30 20:00:07,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22769 conditions, 8152 events. 5990/8152 cut-off events. For 8947/9589 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 41270 event pairs, 1923 based on Foata normal form. 642/6955 useless extension candidates. Maximal degree in co-relation 22740. Up to 4077 conditions per place. [2023-08-30 20:00:07,826 INFO L137 encePairwiseOnDemand]: 469/475 looper letters, 66 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-08-30 20:00:07,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 509 flow [2023-08-30 20:00:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:00:07,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:00:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1019 transitions. [2023-08-30 20:00:07,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42905263157894735 [2023-08-30 20:00:07,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1019 transitions. [2023-08-30 20:00:07,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1019 transitions. [2023-08-30 20:00:07,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:07,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1019 transitions. [2023-08-30 20:00:07,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.8) internal successors, (1019), 5 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:07,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:07,835 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:07,835 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 237 flow. Second operand 5 states and 1019 transitions. [2023-08-30 20:00:07,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 509 flow [2023-08-30 20:00:07,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 497 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 20:00:07,872 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 249 flow [2023-08-30 20:00:07,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-08-30 20:00:07,873 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2023-08-30 20:00:07,873 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 249 flow [2023-08-30 20:00:07,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 198.8) internal successors, (994), 5 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:07,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:07,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:07,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:08,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 20:00:08,082 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:08,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:08,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1999844878, now seen corresponding path program 1 times [2023-08-30 20:00:08,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:08,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767852936] [2023-08-30 20:00:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:08,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:08,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:08,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767852936] [2023-08-30 20:00:08,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767852936] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:08,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:08,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:00:08,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363043589] [2023-08-30 20:00:08,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:08,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:00:08,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:08,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:00:08,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:00:08,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 475 [2023-08-30 20:00:08,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:08,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:08,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 475 [2023-08-30 20:00:08,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:09,219 INFO L130 PetriNetUnfolder]: 6264/8556 cut-off events. [2023-08-30 20:00:09,219 INFO L131 PetriNetUnfolder]: For 9787/10463 co-relation queries the response was YES. [2023-08-30 20:00:09,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26431 conditions, 8556 events. 6264/8556 cut-off events. For 9787/10463 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42223 event pairs, 3638 based on Foata normal form. 779/8085 useless extension candidates. Maximal degree in co-relation 26401. Up to 5469 conditions per place. [2023-08-30 20:00:09,267 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 83 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-08-30 20:00:09,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 585 flow [2023-08-30 20:00:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:00:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:00:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2023-08-30 20:00:09,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357894736842105 [2023-08-30 20:00:09,271 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2023-08-30 20:00:09,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2023-08-30 20:00:09,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:09,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2023-08-30 20:00:09,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:09,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:09,279 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 475.0) internal successors, (2850), 6 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:09,279 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 249 flow. Second operand 5 states and 1035 transitions. [2023-08-30 20:00:09,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 585 flow [2023-08-30 20:00:09,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 575 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 20:00:09,316 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 300 flow [2023-08-30 20:00:09,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-08-30 20:00:09,317 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-08-30 20:00:09,317 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 300 flow [2023-08-30 20:00:09,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:09,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:09,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:09,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 20:00:09,318 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:09,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:09,319 INFO L85 PathProgramCache]: Analyzing trace with hash 800859454, now seen corresponding path program 2 times [2023-08-30 20:00:09,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:09,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798722022] [2023-08-30 20:00:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:09,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:09,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:09,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798722022] [2023-08-30 20:00:09,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798722022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:09,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:09,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 20:00:09,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910417718] [2023-08-30 20:00:09,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:09,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:00:09,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:09,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:00:09,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:00:09,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 475 [2023-08-30 20:00:09,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 300 flow. Second operand has 8 states, 8 states have (on average 190.25) internal successors, (1522), 8 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:09,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:09,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 475 [2023-08-30 20:00:09,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:10,748 INFO L130 PetriNetUnfolder]: 6520/8911 cut-off events. [2023-08-30 20:00:10,749 INFO L131 PetriNetUnfolder]: For 12687/13385 co-relation queries the response was YES. [2023-08-30 20:00:10,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28906 conditions, 8911 events. 6520/8911 cut-off events. For 12687/13385 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44134 event pairs, 3696 based on Foata normal form. 788/8394 useless extension candidates. Maximal degree in co-relation 28874. Up to 5466 conditions per place. [2023-08-30 20:00:10,785 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 83 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2023-08-30 20:00:10,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 94 transitions, 631 flow [2023-08-30 20:00:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:00:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:00:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1197 transitions. [2023-08-30 20:00:10,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2023-08-30 20:00:10,789 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1197 transitions. [2023-08-30 20:00:10,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1197 transitions. [2023-08-30 20:00:10,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:10,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1197 transitions. [2023-08-30 20:00:10,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:10,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:10,797 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:10,797 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 300 flow. Second operand 6 states and 1197 transitions. [2023-08-30 20:00:10,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 94 transitions, 631 flow [2023-08-30 20:00:10,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 94 transitions, 626 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 20:00:10,829 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 329 flow [2023-08-30 20:00:10,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-08-30 20:00:10,830 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2023-08-30 20:00:10,830 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 329 flow [2023-08-30 20:00:10,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 190.25) internal successors, (1522), 8 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:10,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:10,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:10,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 20:00:10,831 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:10,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1628528424, now seen corresponding path program 3 times [2023-08-30 20:00:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:10,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334260884] [2023-08-30 20:00:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:11,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:11,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334260884] [2023-08-30 20:00:11,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334260884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:11,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:11,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 20:00:11,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250017380] [2023-08-30 20:00:11,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:11,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:00:11,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:11,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:00:11,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:00:11,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 475 [2023-08-30 20:00:11,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:11,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:11,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 475 [2023-08-30 20:00:11,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:12,162 INFO L130 PetriNetUnfolder]: 5942/8166 cut-off events. [2023-08-30 20:00:12,162 INFO L131 PetriNetUnfolder]: For 15503/16163 co-relation queries the response was YES. [2023-08-30 20:00:12,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27660 conditions, 8166 events. 5942/8166 cut-off events. For 15503/16163 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 40226 event pairs, 3407 based on Foata normal form. 750/7738 useless extension candidates. Maximal degree in co-relation 27626. Up to 5466 conditions per place. [2023-08-30 20:00:12,196 INFO L137 encePairwiseOnDemand]: 468/475 looper letters, 81 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2023-08-30 20:00:12,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 643 flow [2023-08-30 20:00:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:00:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:00:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1188 transitions. [2023-08-30 20:00:12,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4168421052631579 [2023-08-30 20:00:12,201 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1188 transitions. [2023-08-30 20:00:12,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1188 transitions. [2023-08-30 20:00:12,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:12,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1188 transitions. [2023-08-30 20:00:12,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:12,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:12,208 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 475.0) internal successors, (3325), 7 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:12,208 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 329 flow. Second operand 6 states and 1188 transitions. [2023-08-30 20:00:12,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 643 flow [2023-08-30 20:00:12,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 92 transitions, 630 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:00:12,238 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 352 flow [2023-08-30 20:00:12,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-08-30 20:00:12,239 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2023-08-30 20:00:12,239 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 352 flow [2023-08-30 20:00:12,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:12,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:12,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:12,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 20:00:12,240 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:12,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash -541050982, now seen corresponding path program 1 times [2023-08-30 20:00:12,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:12,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661295340] [2023-08-30 20:00:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:12,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:12,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:12,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661295340] [2023-08-30 20:00:12,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661295340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:12,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949504165] [2023-08-30 20:00:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:12,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:12,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:12,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:12,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:00:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:12,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 20:00:12,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:12,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:12,651 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 23 treesize of output 7 [2023-08-30 20:00:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:12,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949504165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:12,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:12,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 20:00:12,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266925015] [2023-08-30 20:00:12,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:12,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:00:12,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:12,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:00:12,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:00:13,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 475 [2023-08-30 20:00:13,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 352 flow. Second operand has 12 states, 12 states have (on average 190.41666666666666) internal successors, (2285), 12 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:13,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:13,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 475 [2023-08-30 20:00:13,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:13,798 INFO L130 PetriNetUnfolder]: 6213/8517 cut-off events. [2023-08-30 20:00:13,799 INFO L131 PetriNetUnfolder]: For 19639/20355 co-relation queries the response was YES. [2023-08-30 20:00:13,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30147 conditions, 8517 events. 6213/8517 cut-off events. For 19639/20355 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 42354 event pairs, 3393 based on Foata normal form. 819/8092 useless extension candidates. Maximal degree in co-relation 30112. Up to 2836 conditions per place. [2023-08-30 20:00:13,833 INFO L137 encePairwiseOnDemand]: 467/475 looper letters, 117 selfloop transitions, 15 changer transitions 0/134 dead transitions. [2023-08-30 20:00:13,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 134 transitions, 917 flow [2023-08-30 20:00:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:00:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:00:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1611 transitions. [2023-08-30 20:00:13,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42394736842105263 [2023-08-30 20:00:13,839 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1611 transitions. [2023-08-30 20:00:13,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1611 transitions. [2023-08-30 20:00:13,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:13,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1611 transitions. [2023-08-30 20:00:13,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 201.375) internal successors, (1611), 8 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:13,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:13,848 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 475.0) internal successors, (4275), 9 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:13,849 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 352 flow. Second operand 8 states and 1611 transitions. [2023-08-30 20:00:13,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 134 transitions, 917 flow [2023-08-30 20:00:13,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 134 transitions, 894 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 20:00:13,880 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 418 flow [2023-08-30 20:00:13,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-08-30 20:00:13,881 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2023-08-30 20:00:13,881 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 418 flow [2023-08-30 20:00:13,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 190.41666666666666) internal successors, (2285), 12 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:13,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:13,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:13,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:14,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:14,089 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:14,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:14,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2109067920, now seen corresponding path program 2 times [2023-08-30 20:00:14,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:14,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857158705] [2023-08-30 20:00:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:14,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:14,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857158705] [2023-08-30 20:00:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857158705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846458661] [2023-08-30 20:00:14,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:00:14,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:14,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:14,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:14,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:00:14,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:00:14,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:00:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 20:00:14,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:14,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 198 [2023-08-30 20:00:14,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 20:00:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:14,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:14,660 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_376 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_376) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (+ |c_thread1Thread1of1ForFork2_~j~0#1| 1))) is different from false [2023-08-30 20:00:14,675 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 41 treesize of output 25 [2023-08-30 20:00:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:14,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846458661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:14,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:14,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:00:14,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006019701] [2023-08-30 20:00:14,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:14,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:00:14,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:14,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:00:14,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=160, Unknown=1, NotChecked=26, Total=240 [2023-08-30 20:00:14,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 475 [2023-08-30 20:00:14,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 418 flow. Second operand has 16 states, 16 states have (on average 152.4375) internal successors, (2439), 16 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:14,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:14,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 475 [2023-08-30 20:00:14,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:15,909 INFO L130 PetriNetUnfolder]: 6973/9575 cut-off events. [2023-08-30 20:00:15,909 INFO L131 PetriNetUnfolder]: For 26518/27290 co-relation queries the response was YES. [2023-08-30 20:00:15,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35706 conditions, 9575 events. 6973/9575 cut-off events. For 26518/27290 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 47927 event pairs, 3387 based on Foata normal form. 862/9034 useless extension candidates. Maximal degree in co-relation 35670. Up to 2833 conditions per place. [2023-08-30 20:00:15,961 INFO L137 encePairwiseOnDemand]: 455/475 looper letters, 115 selfloop transitions, 46 changer transitions 0/163 dead transitions. [2023-08-30 20:00:15,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 163 transitions, 1175 flow [2023-08-30 20:00:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:00:15,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:00:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1789 transitions. [2023-08-30 20:00:15,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34239234449760764 [2023-08-30 20:00:15,968 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1789 transitions. [2023-08-30 20:00:15,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1789 transitions. [2023-08-30 20:00:15,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:15,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1789 transitions. [2023-08-30 20:00:15,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 162.63636363636363) internal successors, (1789), 11 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:15,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 475.0) internal successors, (5700), 12 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:15,979 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 475.0) internal successors, (5700), 12 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:15,979 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 418 flow. Second operand 11 states and 1789 transitions. [2023-08-30 20:00:15,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 163 transitions, 1175 flow [2023-08-30 20:00:16,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 163 transitions, 1134 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-30 20:00:16,037 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 745 flow [2023-08-30 20:00:16,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=745, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2023-08-30 20:00:16,038 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2023-08-30 20:00:16,038 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 745 flow [2023-08-30 20:00:16,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 152.4375) internal successors, (2439), 16 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:16,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:16,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:16,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:16,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:16,245 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:16,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:16,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1281398950, now seen corresponding path program 3 times [2023-08-30 20:00:16,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:16,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135053383] [2023-08-30 20:00:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:16,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:16,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:16,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135053383] [2023-08-30 20:00:16,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135053383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:16,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395936025] [2023-08-30 20:00:16,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:00:16,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:16,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:16,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:16,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:00:16,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:00:16,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:00:16,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 20:00:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:17,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:00:17,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 20:00:17,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:00:17,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 20:00:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:17,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:17,196 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 157 treesize of output 133 [2023-08-30 20:00:17,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-08-30 20:00:17,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-30 20:00:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:00:17,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395936025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:17,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:17,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-08-30 20:00:17,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737565229] [2023-08-30 20:00:17,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:17,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:00:17,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:17,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:00:17,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=340, Unknown=6, NotChecked=0, Total=420 [2023-08-30 20:00:19,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:21,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:23,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:25,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:27,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:29,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:31,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:33,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:36,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:38,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:41,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:43,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:00:43,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 475 [2023-08-30 20:00:43,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 745 flow. Second operand has 21 states, 21 states have (on average 149.42857142857142) internal successors, (3138), 21 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:43,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:43,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 475 [2023-08-30 20:00:43,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:44,316 INFO L130 PetriNetUnfolder]: 6365/8790 cut-off events. [2023-08-30 20:00:44,316 INFO L131 PetriNetUnfolder]: For 30415/31227 co-relation queries the response was YES. [2023-08-30 20:00:44,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43737 conditions, 8790 events. 6365/8790 cut-off events. For 30415/31227 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 43279 event pairs, 3098 based on Foata normal form. 828/8345 useless extension candidates. Maximal degree in co-relation 43697. Up to 4927 conditions per place. [2023-08-30 20:00:44,365 INFO L137 encePairwiseOnDemand]: 468/475 looper letters, 144 selfloop transitions, 18 changer transitions 0/164 dead transitions. [2023-08-30 20:00:44,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 164 transitions, 1516 flow [2023-08-30 20:00:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:00:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:00:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1434 transitions. [2023-08-30 20:00:44,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3354385964912281 [2023-08-30 20:00:44,373 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1434 transitions. [2023-08-30 20:00:44,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1434 transitions. [2023-08-30 20:00:44,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:44,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1434 transitions. [2023-08-30 20:00:44,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:44,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 475.0) internal successors, (4750), 10 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:44,381 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 475.0) internal successors, (4750), 10 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:44,382 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 745 flow. Second operand 9 states and 1434 transitions. [2023-08-30 20:00:44,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 164 transitions, 1516 flow [2023-08-30 20:00:44,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 164 transitions, 1481 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-30 20:00:44,458 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 769 flow [2023-08-30 20:00:44,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=769, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2023-08-30 20:00:44,459 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2023-08-30 20:00:44,459 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 769 flow [2023-08-30 20:00:44,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 149.42857142857142) internal successors, (3138), 21 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:44,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:44,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:44,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:44,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 20:00:44,667 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:44,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash -935293517, now seen corresponding path program 1 times [2023-08-30 20:00:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:44,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316704527] [2023-08-30 20:00:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:44,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:00:45,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:45,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316704527] [2023-08-30 20:00:45,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316704527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:45,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077845957] [2023-08-30 20:00:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:45,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:45,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:45,298 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:45,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:00:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:45,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 20:00:45,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:00:45,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 20:00:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:00:45,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:45,961 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_487 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_487) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))) 1)) is different from false [2023-08-30 20:00:45,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:45,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2023-08-30 20:00:45,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-30 20:00:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:00:46,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077845957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:46,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:46,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2023-08-30 20:00:46,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34103435] [2023-08-30 20:00:46,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:46,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 20:00:46,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:46,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 20:00:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1017, Unknown=1, NotChecked=64, Total=1190 [2023-08-30 20:00:46,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 475 [2023-08-30 20:00:46,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 769 flow. Second operand has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:46,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:46,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 475 [2023-08-30 20:00:46,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:52,875 INFO L130 PetriNetUnfolder]: 33140/45583 cut-off events. [2023-08-30 20:00:52,875 INFO L131 PetriNetUnfolder]: For 183726/183726 co-relation queries the response was YES. [2023-08-30 20:00:53,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233256 conditions, 45583 events. 33140/45583 cut-off events. For 183726/183726 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 270185 event pairs, 5215 based on Foata normal form. 168/40811 useless extension candidates. Maximal degree in co-relation 158746. Up to 21924 conditions per place. [2023-08-30 20:00:53,192 INFO L137 encePairwiseOnDemand]: 450/475 looper letters, 786 selfloop transitions, 317 changer transitions 100/1203 dead transitions. [2023-08-30 20:00:53,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 1203 transitions, 12578 flow [2023-08-30 20:00:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 20:00:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 20:00:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5493 transitions. [2023-08-30 20:00:53,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125462304409673 [2023-08-30 20:00:53,205 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5493 transitions. [2023-08-30 20:00:53,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5493 transitions. [2023-08-30 20:00:53,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:53,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5493 transitions. [2023-08-30 20:00:53,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 148.45945945945945) internal successors, (5493), 37 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:53,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 475.0) internal successors, (18050), 38 states have internal predecessors, (18050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:53,237 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 475.0) internal successors, (18050), 38 states have internal predecessors, (18050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:53,237 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 769 flow. Second operand 37 states and 5493 transitions. [2023-08-30 20:00:53,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 1203 transitions, 12578 flow [2023-08-30 20:00:54,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 1203 transitions, 12125 flow, removed 72 selfloop flow, removed 7 redundant places. [2023-08-30 20:00:54,046 INFO L231 Difference]: Finished difference. Result has 133 places, 420 transitions, 5476 flow [2023-08-30 20:00:54,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5476, PETRI_PLACES=133, PETRI_TRANSITIONS=420} [2023-08-30 20:00:54,048 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 97 predicate places. [2023-08-30 20:00:54,048 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 420 transitions, 5476 flow [2023-08-30 20:00:54,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:54,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:54,049 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:54,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:00:54,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:54,260 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:00:54,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:54,261 INFO L85 PathProgramCache]: Analyzing trace with hash 792253339, now seen corresponding path program 2 times [2023-08-30 20:00:54,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:54,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854114411] [2023-08-30 20:00:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:54,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:00:55,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:55,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854114411] [2023-08-30 20:00:55,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854114411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:55,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912032957] [2023-08-30 20:00:55,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:00:55,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:55,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:55,198 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:55,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:00:55,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:00:55,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:00:55,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 20:00:55,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:00:55,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:55,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:00:55,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-08-30 20:00:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:00:55,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912032957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:55,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:55,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2023-08-30 20:00:55,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393967053] [2023-08-30 20:00:55,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:55,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:00:55,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:55,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:00:55,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:00:58,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 475 [2023-08-30 20:00:58,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 420 transitions, 5476 flow. Second operand has 30 states, 30 states have (on average 174.3) internal successors, (5229), 30 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:58,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:58,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 475 [2023-08-30 20:00:58,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:06,844 INFO L130 PetriNetUnfolder]: 26611/37134 cut-off events. [2023-08-30 20:01:06,844 INFO L131 PetriNetUnfolder]: For 558661/558661 co-relation queries the response was YES. [2023-08-30 20:01:07,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285445 conditions, 37134 events. 26611/37134 cut-off events. For 558661/558661 co-relation queries the response was YES. Maximal size of possible extension queue 1232. Compared 221386 event pairs, 6015 based on Foata normal form. 1475/38513 useless extension candidates. Maximal degree in co-relation 263413. Up to 17769 conditions per place. [2023-08-30 20:01:07,367 INFO L137 encePairwiseOnDemand]: 457/475 looper letters, 736 selfloop transitions, 501 changer transitions 424/1661 dead transitions. [2023-08-30 20:01:07,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1661 transitions, 25517 flow [2023-08-30 20:01:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-30 20:01:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-30 20:01:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 10858 transitions. [2023-08-30 20:01:07,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38098245614035087 [2023-08-30 20:01:07,381 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 10858 transitions. [2023-08-30 20:01:07,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 10858 transitions. [2023-08-30 20:01:07,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:01:07,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 10858 transitions. [2023-08-30 20:01:07,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 180.96666666666667) internal successors, (10858), 60 states have internal predecessors, (10858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:07,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 475.0) internal successors, (28975), 61 states have internal predecessors, (28975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:07,431 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 475.0) internal successors, (28975), 61 states have internal predecessors, (28975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:07,431 INFO L175 Difference]: Start difference. First operand has 133 places, 420 transitions, 5476 flow. Second operand 60 states and 10858 transitions. [2023-08-30 20:01:07,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1661 transitions, 25517 flow [2023-08-30 20:01:11,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 1661 transitions, 24560 flow, removed 295 selfloop flow, removed 3 redundant places. [2023-08-30 20:01:11,240 INFO L231 Difference]: Finished difference. Result has 234 places, 796 transitions, 11744 flow [2023-08-30 20:01:11,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=11744, PETRI_PLACES=234, PETRI_TRANSITIONS=796} [2023-08-30 20:01:11,241 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 198 predicate places. [2023-08-30 20:01:11,241 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 796 transitions, 11744 flow [2023-08-30 20:01:11,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 174.3) internal successors, (5229), 30 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:11,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:01:11,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:01:11,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:01:11,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:11,452 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:01:11,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:01:11,453 INFO L85 PathProgramCache]: Analyzing trace with hash -880731739, now seen corresponding path program 3 times [2023-08-30 20:01:11,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:01:11,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31607525] [2023-08-30 20:01:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:11,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:01:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:01:12,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:01:12,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31607525] [2023-08-30 20:01:12,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31607525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:01:12,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535145230] [2023-08-30 20:01:12,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:01:12,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:12,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:01:12,257 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:01:12,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:01:12,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:01:12,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:01:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 20:01:12,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:01:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:01:12,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:01:12,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:01:12,742 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 23 treesize of output 15 [2023-08-30 20:01:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:01:12,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535145230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:01:12,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:01:12,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-08-30 20:01:12,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936258897] [2023-08-30 20:01:12,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:01:12,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:01:12,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:01:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:01:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:01:15,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 475 [2023-08-30 20:01:15,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 796 transitions, 11744 flow. Second operand has 30 states, 30 states have (on average 173.6) internal successors, (5208), 30 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:15,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:15,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 475 [2023-08-30 20:01:15,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:29,606 INFO L130 PetriNetUnfolder]: 34900/47693 cut-off events. [2023-08-30 20:01:29,606 INFO L131 PetriNetUnfolder]: For 1406199/1406199 co-relation queries the response was YES. [2023-08-30 20:01:30,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432369 conditions, 47693 events. 34900/47693 cut-off events. For 1406199/1406199 co-relation queries the response was YES. Maximal size of possible extension queue 1747. Compared 283381 event pairs, 3862 based on Foata normal form. 140/47593 useless extension candidates. Maximal degree in co-relation 425762. Up to 20582 conditions per place. [2023-08-30 20:01:30,255 INFO L137 encePairwiseOnDemand]: 455/475 looper letters, 1323 selfloop transitions, 1268 changer transitions 114/2705 dead transitions. [2023-08-30 20:01:30,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 2705 transitions, 46578 flow [2023-08-30 20:01:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-30 20:01:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-30 20:01:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 9045 transitions. [2023-08-30 20:01:30,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38084210526315787 [2023-08-30 20:01:30,264 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 9045 transitions. [2023-08-30 20:01:30,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 9045 transitions. [2023-08-30 20:01:30,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:01:30,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 9045 transitions. [2023-08-30 20:01:30,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 180.9) internal successors, (9045), 50 states have internal predecessors, (9045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:30,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 475.0) internal successors, (24225), 51 states have internal predecessors, (24225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:30,295 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 475.0) internal successors, (24225), 51 states have internal predecessors, (24225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:30,295 INFO L175 Difference]: Start difference. First operand has 234 places, 796 transitions, 11744 flow. Second operand 50 states and 9045 transitions. [2023-08-30 20:01:30,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 2705 transitions, 46578 flow [2023-08-30 20:01:45,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 2705 transitions, 41013 flow, removed 2779 selfloop flow, removed 3 redundant places. [2023-08-30 20:01:45,619 INFO L231 Difference]: Finished difference. Result has 315 places, 1695 transitions, 27600 flow [2023-08-30 20:01:45,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=9903, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=27600, PETRI_PLACES=315, PETRI_TRANSITIONS=1695} [2023-08-30 20:01:45,620 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 279 predicate places. [2023-08-30 20:01:45,620 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 1695 transitions, 27600 flow [2023-08-30 20:01:45,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 173.6) internal successors, (5208), 30 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:45,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:01:45,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:01:45,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:01:45,827 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,SelfDestructingSolverStorable14 [2023-08-30 20:01:45,827 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:01:45,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:01:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1482880989, now seen corresponding path program 4 times [2023-08-30 20:01:45,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:01:45,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930182338] [2023-08-30 20:01:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:01:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:01:46,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:01:46,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930182338] [2023-08-30 20:01:46,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930182338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:01:46,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337108485] [2023-08-30 20:01:47,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:01:47,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:47,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:01:47,001 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:01:47,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:01:47,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:01:47,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:01:47,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 20:01:47,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:01:47,393 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:01:47,393 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 17 treesize of output 11 [2023-08-30 20:01:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:01:47,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:01:47,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:01:47,622 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 23 treesize of output 15 [2023-08-30 20:01:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:01:47,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337108485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:01:47,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:01:47,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 30 [2023-08-30 20:01:47,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188792139] [2023-08-30 20:01:47,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:01:47,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:01:47,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:01:47,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:01:47,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:01:50,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 475 [2023-08-30 20:01:50,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1695 transitions, 27600 flow. Second operand has 30 states, 30 states have (on average 174.23333333333332) internal successors, (5227), 30 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:50,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:50,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 475 [2023-08-30 20:01:50,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:02:35,486 INFO L130 PetriNetUnfolder]: 79796/108969 cut-off events. [2023-08-30 20:02:35,486 INFO L131 PetriNetUnfolder]: For 4447174/4448160 co-relation queries the response was YES. [2023-08-30 20:02:37,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120646 conditions, 108969 events. 79796/108969 cut-off events. For 4447174/4448160 co-relation queries the response was YES. Maximal size of possible extension queue 4178. Compared 713820 event pairs, 5130 based on Foata normal form. 1034/109988 useless extension candidates. Maximal degree in co-relation 1115365. Up to 46512 conditions per place. [2023-08-30 20:02:38,277 INFO L137 encePairwiseOnDemand]: 458/475 looper letters, 2414 selfloop transitions, 4243 changer transitions 0/6764 dead transitions. [2023-08-30 20:02:38,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 6764 transitions, 127215 flow [2023-08-30 20:02:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-08-30 20:02:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-08-30 20:02:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 18230 transitions. [2023-08-30 20:02:38,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3837894736842105 [2023-08-30 20:02:38,301 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 18230 transitions. [2023-08-30 20:02:38,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 18230 transitions. [2023-08-30 20:02:38,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:02:38,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 18230 transitions. [2023-08-30 20:02:38,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 182.3) internal successors, (18230), 100 states have internal predecessors, (18230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:38,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 475.0) internal successors, (47975), 101 states have internal predecessors, (47975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:38,378 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 475.0) internal successors, (47975), 101 states have internal predecessors, (47975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:38,378 INFO L175 Difference]: Start difference. First operand has 315 places, 1695 transitions, 27600 flow. Second operand 100 states and 18230 transitions. [2023-08-30 20:02:38,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 6764 transitions, 127215 flow [2023-08-30 20:04:35,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 6764 transitions, 120324 flow, removed 2613 selfloop flow, removed 15 redundant places. [2023-08-30 20:04:35,809 INFO L231 Difference]: Finished difference. Result has 466 places, 5133 transitions, 100916 flow [2023-08-30 20:04:35,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=26183, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=100916, PETRI_PLACES=466, PETRI_TRANSITIONS=5133} [2023-08-30 20:04:35,811 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 430 predicate places. [2023-08-30 20:04:35,811 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 5133 transitions, 100916 flow [2023-08-30 20:04:35,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 174.23333333333332) internal successors, (5227), 30 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:35,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:04:35,812 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:04:35,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:04:36,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 20:04:36,013 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:04:36,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:04:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash 277368277, now seen corresponding path program 5 times [2023-08-30 20:04:36,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:04:36,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170938337] [2023-08-30 20:04:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:04:36,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:04:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:04:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:04:37,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:04:37,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170938337] [2023-08-30 20:04:37,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170938337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:04:37,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888146188] [2023-08-30 20:04:37,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:04:37,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:04:37,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:04:37,334 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:04:37,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:04:37,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:04:37,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:04:37,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 20:04:37,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:04:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:04:37,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:04:37,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:04:37,903 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 23 treesize of output 15 [2023-08-30 20:04:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:04:38,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888146188] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:04:38,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:04:38,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 35 [2023-08-30 20:04:38,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307922601] [2023-08-30 20:04:38,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:04:38,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 20:04:38,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:04:38,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 20:04:38,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 20:04:42,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 475 [2023-08-30 20:04:42,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 5133 transitions, 100916 flow. Second operand has 36 states, 36 states have (on average 164.97222222222223) internal successors, (5939), 36 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:42,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:04:42,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 475 [2023-08-30 20:04:42,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:06:30,195 INFO L130 PetriNetUnfolder]: 91421/125279 cut-off events. [2023-08-30 20:06:30,196 INFO L131 PetriNetUnfolder]: For 5563756/5563756 co-relation queries the response was YES. [2023-08-30 20:06:33,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412408 conditions, 125279 events. 91421/125279 cut-off events. For 5563756/5563756 co-relation queries the response was YES. Maximal size of possible extension queue 4662. Compared 833004 event pairs, 11898 based on Foata normal form. 534/125813 useless extension candidates. Maximal degree in co-relation 1407131. Up to 54207 conditions per place. [2023-08-30 20:06:34,754 INFO L137 encePairwiseOnDemand]: 458/475 looper letters, 3529 selfloop transitions, 4967 changer transitions 0/8496 dead transitions. [2023-08-30 20:06:34,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 8496 transitions, 186655 flow [2023-08-30 20:06:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-30 20:06:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-30 20:06:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 11122 transitions. [2023-08-30 20:06:34,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602267206477733 [2023-08-30 20:06:34,773 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 11122 transitions. [2023-08-30 20:06:34,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 11122 transitions. [2023-08-30 20:06:34,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:06:34,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 11122 transitions. [2023-08-30 20:06:34,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 171.1076923076923) internal successors, (11122), 65 states have internal predecessors, (11122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:34,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 475.0) internal successors, (31350), 66 states have internal predecessors, (31350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:34,819 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 475.0) internal successors, (31350), 66 states have internal predecessors, (31350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:34,819 INFO L175 Difference]: Start difference. First operand has 466 places, 5133 transitions, 100916 flow. Second operand 65 states and 11122 transitions. [2023-08-30 20:06:34,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 8496 transitions, 186655 flow [2023-08-30 20:11:12,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 8496 transitions, 170778 flow, removed 6478 selfloop flow, removed 7 redundant places. [2023-08-30 20:11:13,141 INFO L231 Difference]: Finished difference. Result has 563 places, 7597 transitions, 155021 flow [2023-08-30 20:11:13,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=475, PETRI_DIFFERENCE_MINUEND_FLOW=93488, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2682, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=155021, PETRI_PLACES=563, PETRI_TRANSITIONS=7597} [2023-08-30 20:11:13,145 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 527 predicate places. [2023-08-30 20:11:13,146 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 7597 transitions, 155021 flow [2023-08-30 20:11:13,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 164.97222222222223) internal successors, (5939), 36 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:13,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:11:13,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:11:13,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:11:13,352 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,SelfDestructingSolverStorable16 [2023-08-30 20:11:13,352 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:11:13,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:11:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash 68083267, now seen corresponding path program 6 times [2023-08-30 20:11:13,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:11:13,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828601466] [2023-08-30 20:11:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:11:13,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:11:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:11:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:11:14,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:11:14,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828601466] [2023-08-30 20:11:14,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828601466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:11:14,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693453519] [2023-08-30 20:11:14,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:11:14,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:11:14,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:11:14,019 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:11:14,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:11:14,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:11:14,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:11:14,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 20:11:14,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:11:14,490 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:11:14,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-30 20:11:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:11:14,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:11:14,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:11:14,622 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 23 treesize of output 15 [2023-08-30 20:11:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:11:14,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693453519] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:11:14,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:11:14,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-30 20:11:14,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902180155] [2023-08-30 20:11:14,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:11:14,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:11:14,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:11:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:11:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2023-08-30 20:11:16,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 475 [2023-08-30 20:11:16,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 7597 transitions, 155021 flow. Second operand has 29 states, 29 states have (on average 179.31034482758622) internal successors, (5200), 29 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:11:16,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:11:16,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 475 [2023-08-30 20:11:16,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand