/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 03:45:19,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 03:45:19,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 03:45:19,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 03:45:19,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 03:45:19,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 03:45:19,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 03:45:19,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 03:45:19,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 03:45:19,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 03:45:19,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 03:45:19,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 03:45:19,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 03:45:19,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 03:45:19,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 03:45:19,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 03:45:19,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 03:45:19,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 03:45:19,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 03:45:19,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 03:45:19,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 03:45:19,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 03:45:19,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 03:45:19,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 03:45:19,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 03:45:19,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 03:45:19,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 03:45:19,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 03:45:19,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 03:45:19,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 03:45:19,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 03:45:19,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 03:45:19,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 03:45:19,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 03:45:19,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 03:45:19,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 03:45:19,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 03:45:19,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 03:45:19,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 03:45:19,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 03:45:19,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 03:45:19,405 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 03:45:19,431 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 03:45:19,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 03:45:19,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 03:45:19,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 03:45:19,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 03:45:19,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 03:45:19,433 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 03:45:19,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 03:45:19,434 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 03:45:19,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 03:45:19,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 03:45:19,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 03:45:19,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 03:45:19,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 03:45:19,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 03:45:19,435 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 03:45:19,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 03:45:19,435 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 03:45:19,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 03:45:19,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 03:45:19,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 03:45:19,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 03:45:19,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 03:45:19,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:45:19,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 03:45:19,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 03:45:19,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 03:45:19,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 03:45:19,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 03:45:19,437 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 03:45:19,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 03:45:19,438 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 03:45:19,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 03:45:19,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 03:45:19,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 03:45:19,690 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 03:45:19,690 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 03:45:19,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-01-28 03:45:20,865 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 03:45:21,043 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 03:45:21,044 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-01-28 03:45:21,052 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caad21239/ed7eea472edd4b07aecdda5f89a1bc89/FLAGf2a767ac9 [2023-01-28 03:45:21,068 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caad21239/ed7eea472edd4b07aecdda5f89a1bc89 [2023-01-28 03:45:21,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 03:45:21,071 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 03:45:21,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 03:45:21,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 03:45:21,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 03:45:21,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a748f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21, skipping insertion in model container [2023-01-28 03:45:21,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 03:45:21,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 03:45:21,278 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-counter-queue2.wvr.c[2271,2284] [2023-01-28 03:45:21,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:45:21,306 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 03:45:21,336 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-counter-queue2.wvr.c[2271,2284] [2023-01-28 03:45:21,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:45:21,355 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:45:21,355 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:45:21,363 INFO L208 MainTranslator]: Completed translation [2023-01-28 03:45:21,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21 WrapperNode [2023-01-28 03:45:21,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 03:45:21,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 03:45:21,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 03:45:21,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 03:45:21,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,415 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 140 [2023-01-28 03:45:21,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 03:45:21,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 03:45:21,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 03:45:21,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 03:45:21,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,448 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 03:45:21,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 03:45:21,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 03:45:21,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 03:45:21,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (1/1) ... [2023-01-28 03:45:21,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:45:21,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:21,493 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) [2023-01-28 03:45:21,521 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 [2023-01-28 03:45:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 03:45:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 03:45:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 03:45:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 03:45:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 03:45:21,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 03:45:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 03:45:21,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 03:45:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 03:45:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 03:45:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 03:45:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 03:45:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 03:45:21,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 03:45:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 03:45:21,541 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 03:45:21,645 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 03:45:21,646 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 03:45:21,905 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 03:45:22,008 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 03:45:22,009 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 03:45:22,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:45:22 BoogieIcfgContainer [2023-01-28 03:45:22,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 03:45:22,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 03:45:22,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 03:45:22,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 03:45:22,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 03:45:21" (1/3) ... [2023-01-28 03:45:22,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d57285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:45:22, skipping insertion in model container [2023-01-28 03:45:22,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:45:21" (2/3) ... [2023-01-28 03:45:22,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d57285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:45:22, skipping insertion in model container [2023-01-28 03:45:22,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:45:22" (3/3) ... [2023-01-28 03:45:22,022 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-01-28 03:45:22,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 03:45:22,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 03:45:22,036 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 03:45:22,101 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 03:45:22,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 109 transitions, 234 flow [2023-01-28 03:45:22,169 INFO L130 PetriNetUnfolder]: 9/107 cut-off events. [2023-01-28 03:45:22,169 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:45:22,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 107 events. 9/107 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-01-28 03:45:22,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 109 transitions, 234 flow [2023-01-28 03:45:22,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 99 transitions, 210 flow [2023-01-28 03:45:22,179 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 03:45:22,186 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 99 transitions, 210 flow [2023-01-28 03:45:22,188 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 99 transitions, 210 flow [2023-01-28 03:45:22,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 99 transitions, 210 flow [2023-01-28 03:45:22,219 INFO L130 PetriNetUnfolder]: 9/99 cut-off events. [2023-01-28 03:45:22,219 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:45:22,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 9/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-01-28 03:45:22,225 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-28 03:45:25,689 INFO L134 LiptonReduction]: Checked pairs total: 585 [2023-01-28 03:45:25,689 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-01-28 03:45:25,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 03:45:25,706 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=false, 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;@4cfd4c61, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 03:45:25,706 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 03:45:25,711 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 03:45:25,711 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:45:25,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:25,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:25,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:25,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1648247353, now seen corresponding path program 1 times [2023-01-28 03:45:25,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:25,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605261668] [2023-01-28 03:45:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:25,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:26,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:26,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605261668] [2023-01-28 03:45:26,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605261668] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:45:26,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:45:26,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 03:45:26,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489719073] [2023-01-28 03:45:26,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:45:26,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:45:26,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:45:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 03:45:26,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 206 [2023-01-28 03:45:26,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:26,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 206 [2023-01-28 03:45:26,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:26,157 INFO L130 PetriNetUnfolder]: 66/116 cut-off events. [2023-01-28 03:45:26,158 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 03:45:26,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 324 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-01-28 03:45:26,160 INFO L137 encePairwiseOnDemand]: 202/206 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-01-28 03:45:26,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2023-01-28 03:45:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:45:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:45:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2023-01-28 03:45:26,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49838187702265374 [2023-01-28 03:45:26,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2023-01-28 03:45:26,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2023-01-28 03:45:26,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:26,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2023-01-28 03:45:26,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,194 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,195 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 308 transitions. [2023-01-28 03:45:26,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2023-01-28 03:45:26,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 03:45:26,199 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-01-28 03:45:26,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-01-28 03:45:26,204 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-28 03:45:26,204 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-01-28 03:45:26,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:26,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:26,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 03:45:26,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:26,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:26,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1272507108, now seen corresponding path program 1 times [2023-01-28 03:45:26,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:26,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523780679] [2023-01-28 03:45:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:26,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:26,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:26,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523780679] [2023-01-28 03:45:26,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523780679] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:45:26,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:45:26,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 03:45:26,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889325066] [2023-01-28 03:45:26,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:45:26,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:45:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:26,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:45:26,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 03:45:26,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:45:26,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:26,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:45:26,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:26,434 INFO L130 PetriNetUnfolder]: 113/217 cut-off events. [2023-01-28 03:45:26,434 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-01-28 03:45:26,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 217 events. 113/217 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 819 event pairs, 48 based on Foata normal form. 12/227 useless extension candidates. Maximal degree in co-relation 168. Up to 122 conditions per place. [2023-01-28 03:45:26,438 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 35 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-01-28 03:45:26,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 194 flow [2023-01-28 03:45:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:45:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:45:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 411 transitions. [2023-01-28 03:45:26,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990291262135922 [2023-01-28 03:45:26,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 411 transitions. [2023-01-28 03:45:26,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 411 transitions. [2023-01-28 03:45:26,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:26,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 411 transitions. [2023-01-28 03:45:26,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,450 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,451 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 411 transitions. [2023-01-28 03:45:26,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 194 flow [2023-01-28 03:45:26,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 03:45:26,453 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 84 flow [2023-01-28 03:45:26,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-01-28 03:45:26,454 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-01-28 03:45:26,454 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 84 flow [2023-01-28 03:45:26,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:26,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:26,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 03:45:26,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:26,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:26,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1514912191, now seen corresponding path program 1 times [2023-01-28 03:45:26,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:26,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940232391] [2023-01-28 03:45:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:26,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:26,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:26,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940232391] [2023-01-28 03:45:26,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940232391] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:45:26,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:45:26,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 03:45:26,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145878574] [2023-01-28 03:45:26,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:45:26,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:45:26,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:26,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:45:26,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 03:45:26,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:45:26,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:26,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:45:26,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:26,702 INFO L130 PetriNetUnfolder]: 79/161 cut-off events. [2023-01-28 03:45:26,703 INFO L131 PetriNetUnfolder]: For 65/70 co-relation queries the response was YES. [2023-01-28 03:45:26,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 161 events. 79/161 cut-off events. For 65/70 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 542 event pairs, 40 based on Foata normal form. 11/170 useless extension candidates. Maximal degree in co-relation 300. Up to 116 conditions per place. [2023-01-28 03:45:26,704 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 17 selfloop transitions, 2 changer transitions 16/36 dead transitions. [2023-01-28 03:45:26,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 185 flow [2023-01-28 03:45:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:45:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:45:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2023-01-28 03:45:26,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39611650485436894 [2023-01-28 03:45:26,706 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2023-01-28 03:45:26,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2023-01-28 03:45:26,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:26,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2023-01-28 03:45:26,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,710 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,711 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 84 flow. Second operand 5 states and 408 transitions. [2023-01-28 03:45:26,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 185 flow [2023-01-28 03:45:26,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 179 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 03:45:26,713 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 74 flow [2023-01-28 03:45:26,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-01-28 03:45:26,714 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-01-28 03:45:26,714 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 74 flow [2023-01-28 03:45:26,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:26,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:26,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:26,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 03:45:26,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:26,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:26,715 INFO L85 PathProgramCache]: Analyzing trace with hash 818882596, now seen corresponding path program 1 times [2023-01-28 03:45:26,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:26,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834372212] [2023-01-28 03:45:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:26,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:26,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834372212] [2023-01-28 03:45:26,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834372212] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329892837] [2023-01-28 03:45:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:26,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:26,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:26,796 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) [2023-01-28 03:45:26,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 03:45:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:26,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 03:45:26,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:26,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:27,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329892837] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:27,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 03:45:27,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-28 03:45:27,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987285001] [2023-01-28 03:45:27,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:45:27,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:45:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:27,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:45:27,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-28 03:45:27,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:45:27,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:27,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:27,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:45:27,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:27,144 INFO L130 PetriNetUnfolder]: 68/122 cut-off events. [2023-01-28 03:45:27,144 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-01-28 03:45:27,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 122 events. 68/122 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 350 event pairs, 23 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 312. Up to 92 conditions per place. [2023-01-28 03:45:27,146 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 21 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2023-01-28 03:45:27,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 149 flow [2023-01-28 03:45:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:45:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:45:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 399 transitions. [2023-01-28 03:45:27,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38737864077669903 [2023-01-28 03:45:27,148 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 399 transitions. [2023-01-28 03:45:27,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 399 transitions. [2023-01-28 03:45:27,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:27,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 399 transitions. [2023-01-28 03:45:27,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:27,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:27,151 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:27,152 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 74 flow. Second operand 5 states and 399 transitions. [2023-01-28 03:45:27,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 149 flow [2023-01-28 03:45:27,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 133 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-01-28 03:45:27,153 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2023-01-28 03:45:27,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-01-28 03:45:27,153 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-01-28 03:45:27,154 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2023-01-28 03:45:27,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:27,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:27,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:27,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 03:45:27,362 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 [2023-01-28 03:45:27,363 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:27,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:27,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1062328821, now seen corresponding path program 1 times [2023-01-28 03:45:27,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:27,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288687418] [2023-01-28 03:45:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:27,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:27,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:27,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288687418] [2023-01-28 03:45:27,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288687418] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:27,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831747409] [2023-01-28 03:45:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:27,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:27,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:27,438 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) [2023-01-28 03:45:27,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 03:45:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:27,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 03:45:27,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:27,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:27,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831747409] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:27,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 03:45:27,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-28 03:45:27,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577467141] [2023-01-28 03:45:27,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:45:27,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 03:45:27,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:27,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 03:45:27,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-28 03:45:27,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:45:27,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:27,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:27,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:45:27,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:27,626 INFO L130 PetriNetUnfolder]: 52/97 cut-off events. [2023-01-28 03:45:27,626 INFO L131 PetriNetUnfolder]: For 59/66 co-relation queries the response was YES. [2023-01-28 03:45:27,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 97 events. 52/97 cut-off events. For 59/66 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 220 event pairs, 20 based on Foata normal form. 15/108 useless extension candidates. Maximal degree in co-relation 267. Up to 75 conditions per place. [2023-01-28 03:45:27,627 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 22 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-01-28 03:45:27,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 163 flow [2023-01-28 03:45:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:45:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:45:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 399 transitions. [2023-01-28 03:45:27,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38737864077669903 [2023-01-28 03:45:27,629 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 399 transitions. [2023-01-28 03:45:27,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 399 transitions. [2023-01-28 03:45:27,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:27,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 399 transitions. [2023-01-28 03:45:27,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:27,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:27,633 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:27,633 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 399 transitions. [2023-01-28 03:45:27,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 163 flow [2023-01-28 03:45:27,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 149 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-01-28 03:45:27,634 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2023-01-28 03:45:27,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-01-28 03:45:27,635 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-01-28 03:45:27,635 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2023-01-28 03:45:27,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:27,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:27,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:27,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:27,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:27,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:27,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:27,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1690720491, now seen corresponding path program 1 times [2023-01-28 03:45:27,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:27,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752953991] [2023-01-28 03:45:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:27,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:28,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:28,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752953991] [2023-01-28 03:45:28,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752953991] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:28,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227845428] [2023-01-28 03:45:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:28,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:28,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:28,332 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) [2023-01-28 03:45:28,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 03:45:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:28,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 03:45:28,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:28,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 03:45:28,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:45:28,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:45:28,603 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 [2023-01-28 03:45:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:28,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:28,748 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int))) (<= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ c_~counter~0 1)))) is different from false [2023-01-28 03:45:28,764 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))))) is different from false [2023-01-28 03:45:28,774 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))) (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-01-28 03:45:28,792 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (<= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (< (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) is different from false [2023-01-28 03:45:28,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:28,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2023-01-28 03:45:28,813 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 286 treesize of output 254 [2023-01-28 03:45:28,823 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 13 treesize of output 11 [2023-01-28 03:45:28,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-01-28 03:45:28,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:28,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-01-28 03:45:28,848 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:45:28,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 64 treesize of output 56 [2023-01-28 03:45:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-01-28 03:45:28,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227845428] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:28,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:28,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-01-28 03:45:28,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244557541] [2023-01-28 03:45:28,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:28,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 03:45:28,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:28,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 03:45:28,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=217, Unknown=4, NotChecked=132, Total=420 [2023-01-28 03:45:28,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:45:28,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:28,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:28,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:45:28,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:29,188 INFO L130 PetriNetUnfolder]: 110/198 cut-off events. [2023-01-28 03:45:29,188 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-01-28 03:45:29,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 606 event pairs, 1 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2023-01-28 03:45:29,190 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-01-28 03:45:29,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 55 transitions, 313 flow [2023-01-28 03:45:29,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 03:45:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 03:45:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 534 transitions. [2023-01-28 03:45:29,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32402912621359226 [2023-01-28 03:45:29,192 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 534 transitions. [2023-01-28 03:45:29,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 534 transitions. [2023-01-28 03:45:29,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:29,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 534 transitions. [2023-01-28 03:45:29,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.75) internal successors, (534), 8 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:29,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:29,197 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:29,197 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 534 transitions. [2023-01-28 03:45:29,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 55 transitions, 313 flow [2023-01-28 03:45:29,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 301 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-01-28 03:45:29,199 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 172 flow [2023-01-28 03:45:29,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-01-28 03:45:29,199 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-01-28 03:45:29,199 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 172 flow [2023-01-28 03:45:29,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:29,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:29,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:29,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:29,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:29,406 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:29,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:29,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1211991097, now seen corresponding path program 2 times [2023-01-28 03:45:29,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:29,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391809657] [2023-01-28 03:45:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:29,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:29,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391809657] [2023-01-28 03:45:29,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391809657] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83034374] [2023-01-28 03:45:29,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:45:29,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:29,756 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) [2023-01-28 03:45:29,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 03:45:29,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:45:29,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:29,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 03:45:29,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:29,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:29,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:29,974 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 22 treesize of output 15 [2023-01-28 03:45:29,984 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 03:45:29,985 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 21 treesize of output 10 [2023-01-28 03:45:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:30,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83034374] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:30,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:30,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 03:45:30,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148023175] [2023-01-28 03:45:30,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:30,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 03:45:30,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:30,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 03:45:30,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 03:45:30,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 03:45:30,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 74.81818181818181) internal successors, (823), 11 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:30,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:30,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 03:45:30,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:30,190 INFO L130 PetriNetUnfolder]: 137/246 cut-off events. [2023-01-28 03:45:30,190 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2023-01-28 03:45:30,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 779 event pairs, 25 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2023-01-28 03:45:30,193 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-01-28 03:45:30,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 387 flow [2023-01-28 03:45:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 03:45:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 03:45:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2023-01-28 03:45:30,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-28 03:45:30,195 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2023-01-28 03:45:30,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2023-01-28 03:45:30,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:30,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2023-01-28 03:45:30,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:30,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:30,200 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:30,200 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 172 flow. Second operand 7 states and 549 transitions. [2023-01-28 03:45:30,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 387 flow [2023-01-28 03:45:30,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 362 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-28 03:45:30,202 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 266 flow [2023-01-28 03:45:30,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=266, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-01-28 03:45:30,203 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-01-28 03:45:30,203 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 266 flow [2023-01-28 03:45:30,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.81818181818181) internal successors, (823), 11 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:30,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:30,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:30,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:30,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:30,410 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:30,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:30,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1666552779, now seen corresponding path program 3 times [2023-01-28 03:45:30,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:30,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705659216] [2023-01-28 03:45:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:30,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:30,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:30,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705659216] [2023-01-28 03:45:30,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705659216] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:30,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021497087] [2023-01-28 03:45:30,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:45:30,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:30,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:30,703 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) [2023-01-28 03:45:30,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 03:45:30,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 03:45:30,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:30,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 03:45:30,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:30,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:30,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:30,909 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 22 treesize of output 15 [2023-01-28 03:45:30,921 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 03:45:30,921 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 21 treesize of output 10 [2023-01-28 03:45:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:30,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021497087] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:30,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:30,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 03:45:30,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679988858] [2023-01-28 03:45:30,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:30,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 03:45:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 03:45:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 03:45:30,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 03:45:30,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:30,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:30,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 03:45:30,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:31,149 INFO L130 PetriNetUnfolder]: 159/285 cut-off events. [2023-01-28 03:45:31,150 INFO L131 PetriNetUnfolder]: For 481/481 co-relation queries the response was YES. [2023-01-28 03:45:31,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 285 events. 159/285 cut-off events. For 481/481 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 962 event pairs, 33 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1087. Up to 233 conditions per place. [2023-01-28 03:45:31,152 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 45 selfloop transitions, 14 changer transitions 1/60 dead transitions. [2023-01-28 03:45:31,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 470 flow [2023-01-28 03:45:31,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 03:45:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 03:45:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2023-01-28 03:45:31,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-28 03:45:31,155 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2023-01-28 03:45:31,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2023-01-28 03:45:31,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:31,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2023-01-28 03:45:31,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:31,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:31,160 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:31,160 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 266 flow. Second operand 7 states and 549 transitions. [2023-01-28 03:45:31,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 470 flow [2023-01-28 03:45:31,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 449 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 03:45:31,164 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 339 flow [2023-01-28 03:45:31,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-01-28 03:45:31,166 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-01-28 03:45:31,166 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 339 flow [2023-01-28 03:45:31,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:31,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:31,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:31,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:31,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:31,378 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:31,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:31,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2131943909, now seen corresponding path program 4 times [2023-01-28 03:45:31,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:31,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706673366] [2023-01-28 03:45:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:31,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:31,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:31,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706673366] [2023-01-28 03:45:31,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706673366] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:31,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213373626] [2023-01-28 03:45:31,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:45:31,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:31,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:31,663 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) [2023-01-28 03:45:31,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 03:45:31,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:45:31,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:31,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 03:45:31,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:31,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:31,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:31,889 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 22 treesize of output 15 [2023-01-28 03:45:31,899 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 03:45:31,899 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 21 treesize of output 10 [2023-01-28 03:45:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:31,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213373626] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:31,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:31,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 03:45:31,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760261308] [2023-01-28 03:45:31,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:31,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 03:45:31,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:31,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 03:45:31,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 03:45:31,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 03:45:31,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 339 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:31,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:31,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 03:45:31,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:32,106 INFO L130 PetriNetUnfolder]: 175/314 cut-off events. [2023-01-28 03:45:32,106 INFO L131 PetriNetUnfolder]: For 675/675 co-relation queries the response was YES. [2023-01-28 03:45:32,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 314 events. 175/314 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1106 event pairs, 37 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 1248. Up to 258 conditions per place. [2023-01-28 03:45:32,109 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 50 selfloop transitions, 14 changer transitions 1/65 dead transitions. [2023-01-28 03:45:32,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 547 flow [2023-01-28 03:45:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 03:45:32,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 03:45:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 551 transitions. [2023-01-28 03:45:32,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38210818307905686 [2023-01-28 03:45:32,111 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 551 transitions. [2023-01-28 03:45:32,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 551 transitions. [2023-01-28 03:45:32,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:32,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 551 transitions. [2023-01-28 03:45:32,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:32,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:32,115 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:32,115 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 339 flow. Second operand 7 states and 551 transitions. [2023-01-28 03:45:32,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 547 flow [2023-01-28 03:45:32,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 516 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-28 03:45:32,119 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 383 flow [2023-01-28 03:45:32,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-01-28 03:45:32,120 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-01-28 03:45:32,120 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 383 flow [2023-01-28 03:45:32,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:32,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:32,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:32,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:32,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:32,326 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:32,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:32,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1053559879, now seen corresponding path program 5 times [2023-01-28 03:45:32,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:32,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265080147] [2023-01-28 03:45:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:32,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:32,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:32,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265080147] [2023-01-28 03:45:32,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265080147] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:32,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274922229] [2023-01-28 03:45:32,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:45:32,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:32,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:32,628 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) [2023-01-28 03:45:32,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 03:45:32,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:45:32,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:32,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 03:45:32,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:32,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:32,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:32,833 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 22 treesize of output 15 [2023-01-28 03:45:32,843 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 03:45:32,843 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 21 treesize of output 10 [2023-01-28 03:45:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:32,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274922229] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:32,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:32,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 03:45:32,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64537314] [2023-01-28 03:45:32,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:32,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 03:45:32,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:32,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 03:45:32,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 03:45:32,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 03:45:32,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 383 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:32,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:32,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 03:45:32,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:33,048 INFO L130 PetriNetUnfolder]: 197/353 cut-off events. [2023-01-28 03:45:33,048 INFO L131 PetriNetUnfolder]: For 1017/1017 co-relation queries the response was YES. [2023-01-28 03:45:33,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 353 events. 197/353 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1290 event pairs, 49 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 1455. Up to 301 conditions per place. [2023-01-28 03:45:33,050 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 50 selfloop transitions, 14 changer transitions 1/65 dead transitions. [2023-01-28 03:45:33,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 596 flow [2023-01-28 03:45:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 03:45:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 03:45:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 547 transitions. [2023-01-28 03:45:33,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37933425797503467 [2023-01-28 03:45:33,052 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 547 transitions. [2023-01-28 03:45:33,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 547 transitions. [2023-01-28 03:45:33,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:33,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 547 transitions. [2023-01-28 03:45:33,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.14285714285714) internal successors, (547), 7 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:33,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:33,056 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:33,056 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 383 flow. Second operand 7 states and 547 transitions. [2023-01-28 03:45:33,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 596 flow [2023-01-28 03:45:33,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 554 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-01-28 03:45:33,061 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 431 flow [2023-01-28 03:45:33,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-01-28 03:45:33,061 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-01-28 03:45:33,061 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 431 flow [2023-01-28 03:45:33,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:33,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:33,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:33,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:33,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:33,268 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:33,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:33,268 INFO L85 PathProgramCache]: Analyzing trace with hash 448505845, now seen corresponding path program 6 times [2023-01-28 03:45:33,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:33,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985923155] [2023-01-28 03:45:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:33,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:33,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:33,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985923155] [2023-01-28 03:45:33,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985923155] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:33,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831783938] [2023-01-28 03:45:33,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:45:33,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:33,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:33,491 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) [2023-01-28 03:45:33,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 03:45:33,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 03:45:33,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:33,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 03:45:33,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:33,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:33,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:33,689 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 14 [2023-01-28 03:45:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:33,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831783938] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:33,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:33,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 03:45:33,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739457089] [2023-01-28 03:45:33,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:33,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 03:45:33,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 03:45:33,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-01-28 03:45:33,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 03:45:33,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 431 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:33,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:33,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 03:45:33,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:33,844 INFO L130 PetriNetUnfolder]: 225/402 cut-off events. [2023-01-28 03:45:33,844 INFO L131 PetriNetUnfolder]: For 1259/1259 co-relation queries the response was YES. [2023-01-28 03:45:33,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 402 events. 225/402 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1530 event pairs, 43 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 1682. Up to 330 conditions per place. [2023-01-28 03:45:33,847 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 52 selfloop transitions, 19 changer transitions 1/72 dead transitions. [2023-01-28 03:45:33,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 692 flow [2023-01-28 03:45:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 03:45:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 03:45:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2023-01-28 03:45:33,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-28 03:45:33,850 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2023-01-28 03:45:33,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2023-01-28 03:45:33,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:33,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2023-01-28 03:45:33,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:33,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:33,854 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:33,854 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 431 flow. Second operand 7 states and 549 transitions. [2023-01-28 03:45:33,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 692 flow [2023-01-28 03:45:33,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 645 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-01-28 03:45:33,860 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 525 flow [2023-01-28 03:45:33,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-01-28 03:45:33,861 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-01-28 03:45:33,862 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 525 flow [2023-01-28 03:45:33,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:33,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:33,862 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:33,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 03:45:34,073 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:34,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2097028727, now seen corresponding path program 7 times [2023-01-28 03:45:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:34,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062819316] [2023-01-28 03:45:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:34,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:34,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062819316] [2023-01-28 03:45:34,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062819316] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:34,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572123166] [2023-01-28 03:45:34,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:45:34,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:34,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:34,160 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) [2023-01-28 03:45:34,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 03:45:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:34,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 03:45:34,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:34,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:34,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572123166] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:34,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:34,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 03:45:34,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395338895] [2023-01-28 03:45:34,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:34,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 03:45:34,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:34,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 03:45:34,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-28 03:45:34,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:45:34,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 525 flow. Second operand has 14 states, 14 states have (on average 77.42857142857143) internal successors, (1084), 14 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:34,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:34,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:45:34,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:34,577 INFO L130 PetriNetUnfolder]: 371/695 cut-off events. [2023-01-28 03:45:34,578 INFO L131 PetriNetUnfolder]: For 2683/2712 co-relation queries the response was YES. [2023-01-28 03:45:34,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 695 events. 371/695 cut-off events. For 2683/2712 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3425 event pairs, 82 based on Foata normal form. 56/740 useless extension candidates. Maximal degree in co-relation 2560. Up to 275 conditions per place. [2023-01-28 03:45:34,583 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 103 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2023-01-28 03:45:34,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 123 transitions, 1289 flow [2023-01-28 03:45:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 03:45:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 03:45:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 648 transitions. [2023-01-28 03:45:34,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932038834951456 [2023-01-28 03:45:34,585 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 648 transitions. [2023-01-28 03:45:34,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 648 transitions. [2023-01-28 03:45:34,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:34,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 648 transitions. [2023-01-28 03:45:34,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:34,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:34,591 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:34,592 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 525 flow. Second operand 8 states and 648 transitions. [2023-01-28 03:45:34,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 123 transitions, 1289 flow [2023-01-28 03:45:34,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 1168 flow, removed 52 selfloop flow, removed 2 redundant places. [2023-01-28 03:45:34,603 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 694 flow [2023-01-28 03:45:34,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2023-01-28 03:45:34,604 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-01-28 03:45:34,604 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 694 flow [2023-01-28 03:45:34,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.42857142857143) internal successors, (1084), 14 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:34,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:34,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:34,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:34,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:34,811 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:34,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:34,811 INFO L85 PathProgramCache]: Analyzing trace with hash 559731294, now seen corresponding path program 8 times [2023-01-28 03:45:34,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:34,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519698567] [2023-01-28 03:45:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:34,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:34,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:34,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519698567] [2023-01-28 03:45:34,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519698567] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:34,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197510883] [2023-01-28 03:45:34,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:45:34,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:34,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:34,893 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) [2023-01-28 03:45:34,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 03:45:34,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:45:34,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:34,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 03:45:34,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:35,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:35,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197510883] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:35,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:35,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 03:45:35,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823100521] [2023-01-28 03:45:35,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:35,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 03:45:35,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:35,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 03:45:35,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-28 03:45:35,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:45:35,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 694 flow. Second operand has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:35,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:35,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:45:35,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:35,286 INFO L130 PetriNetUnfolder]: 305/609 cut-off events. [2023-01-28 03:45:35,286 INFO L131 PetriNetUnfolder]: For 1817/1840 co-relation queries the response was YES. [2023-01-28 03:45:35,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2620 conditions, 609 events. 305/609 cut-off events. For 1817/1840 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3096 event pairs, 89 based on Foata normal form. 53/656 useless extension candidates. Maximal degree in co-relation 2322. Up to 251 conditions per place. [2023-01-28 03:45:35,290 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 66 selfloop transitions, 4 changer transitions 36/110 dead transitions. [2023-01-28 03:45:35,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 1137 flow [2023-01-28 03:45:35,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 03:45:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 03:45:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 647 transitions. [2023-01-28 03:45:35,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925970873786408 [2023-01-28 03:45:35,292 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 647 transitions. [2023-01-28 03:45:35,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 647 transitions. [2023-01-28 03:45:35,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:35,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 647 transitions. [2023-01-28 03:45:35,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.875) internal successors, (647), 8 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:35,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:35,297 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:35,297 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 694 flow. Second operand 8 states and 647 transitions. [2023-01-28 03:45:35,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 1137 flow [2023-01-28 03:45:35,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 1129 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 03:45:35,310 INFO L231 Difference]: Finished difference. Result has 86 places, 59 transitions, 567 flow [2023-01-28 03:45:35,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=567, PETRI_PLACES=86, PETRI_TRANSITIONS=59} [2023-01-28 03:45:35,310 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-01-28 03:45:35,310 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 59 transitions, 567 flow [2023-01-28 03:45:35,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:35,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:35,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:35,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:35,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 03:45:35,517 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:35,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:35,518 INFO L85 PathProgramCache]: Analyzing trace with hash 650633796, now seen corresponding path program 9 times [2023-01-28 03:45:35,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:35,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344746102] [2023-01-28 03:45:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:35,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:35,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:35,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344746102] [2023-01-28 03:45:35,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344746102] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:35,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381271736] [2023-01-28 03:45:35,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:45:35,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:35,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:35,596 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) [2023-01-28 03:45:35,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 03:45:35,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 03:45:35,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:35,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 03:45:35,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:35,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:35,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381271736] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:35,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:35,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 03:45:35,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114081216] [2023-01-28 03:45:35,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:35,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 03:45:35,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:35,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 03:45:35,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-28 03:45:35,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:45:35,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 59 transitions, 567 flow. Second operand has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:35,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:35,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:45:35,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:35,934 INFO L130 PetriNetUnfolder]: 165/296 cut-off events. [2023-01-28 03:45:35,935 INFO L131 PetriNetUnfolder]: For 1576/1583 co-relation queries the response was YES. [2023-01-28 03:45:35,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1606 conditions, 296 events. 165/296 cut-off events. For 1576/1583 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1036 event pairs, 28 based on Foata normal form. 51/346 useless extension candidates. Maximal degree in co-relation 1547. Up to 139 conditions per place. [2023-01-28 03:45:35,937 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 41 selfloop transitions, 25 changer transitions 0/70 dead transitions. [2023-01-28 03:45:35,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 70 transitions, 785 flow [2023-01-28 03:45:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 03:45:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 03:45:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-01-28 03:45:35,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855755894590846 [2023-01-28 03:45:35,940 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-01-28 03:45:35,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-01-28 03:45:35,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:35,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-01-28 03:45:35,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:35,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:35,944 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:35,944 INFO L175 Difference]: Start difference. First operand has 86 places, 59 transitions, 567 flow. Second operand 7 states and 556 transitions. [2023-01-28 03:45:35,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 70 transitions, 785 flow [2023-01-28 03:45:35,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 630 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-01-28 03:45:35,951 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 510 flow [2023-01-28 03:45:35,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=510, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-28 03:45:35,952 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-01-28 03:45:35,952 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 510 flow [2023-01-28 03:45:35,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:35,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:35,952 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:35,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:36,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 03:45:36,158 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:36,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:36,158 INFO L85 PathProgramCache]: Analyzing trace with hash -937838569, now seen corresponding path program 10 times [2023-01-28 03:45:36,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:36,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073093479] [2023-01-28 03:45:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:36,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:36,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:36,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073093479] [2023-01-28 03:45:36,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073093479] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:36,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825127321] [2023-01-28 03:45:36,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:45:36,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:36,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:36,236 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:36,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 03:45:36,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:45:36,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:36,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 03:45:36,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:36,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:36,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825127321] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:36,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:36,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 03:45:36,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754538490] [2023-01-28 03:45:36,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:36,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 03:45:36,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 03:45:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-28 03:45:36,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:45:36,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 510 flow. Second operand has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:36,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:36,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:45:36,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:36,530 INFO L130 PetriNetUnfolder]: 120/214 cut-off events. [2023-01-28 03:45:36,530 INFO L131 PetriNetUnfolder]: For 1323/1332 co-relation queries the response was YES. [2023-01-28 03:45:36,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 214 events. 120/214 cut-off events. For 1323/1332 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 650 event pairs, 27 based on Foata normal form. 31/242 useless extension candidates. Maximal degree in co-relation 1167. Up to 118 conditions per place. [2023-01-28 03:45:36,532 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 42 selfloop transitions, 25 changer transitions 0/71 dead transitions. [2023-01-28 03:45:36,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 730 flow [2023-01-28 03:45:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 03:45:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 03:45:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-01-28 03:45:36,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855755894590846 [2023-01-28 03:45:36,535 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-01-28 03:45:36,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-01-28 03:45:36,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:36,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-01-28 03:45:36,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:36,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:36,539 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:36,539 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 510 flow. Second operand 7 states and 556 transitions. [2023-01-28 03:45:36,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 730 flow [2023-01-28 03:45:36,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 648 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-01-28 03:45:36,544 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 522 flow [2023-01-28 03:45:36,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2023-01-28 03:45:36,545 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2023-01-28 03:45:36,545 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 522 flow [2023-01-28 03:45:36,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:36,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:36,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:36,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:36,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 03:45:36,752 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:36,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:36,752 INFO L85 PathProgramCache]: Analyzing trace with hash -603236243, now seen corresponding path program 11 times [2023-01-28 03:45:36,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:36,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430859820] [2023-01-28 03:45:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:36,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:37,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:37,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430859820] [2023-01-28 03:45:37,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430859820] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:37,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737894832] [2023-01-28 03:45:37,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:45:37,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:37,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:37,641 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:37,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 03:45:37,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:45:37,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-28 03:45:37,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:37,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:45:37,906 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 20 treesize of output 20 [2023-01-28 03:45:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:38,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:38,135 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_446 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset))) (+ c_~counter~0 1))) (forall ((v_ArrVal_446 (Array Int Int))) (<= c_~counter~0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~A~0.base))) (+ (select .cse2 .cse1) (select .cse2 c_~A~0.offset))))))) is different from false [2023-01-28 03:45:38,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:38,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 68 [2023-01-28 03:45:38,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:38,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2023-01-28 03:45:38,310 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:45:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:38,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737894832] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:38,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:38,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 29 [2023-01-28 03:45:38,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763938508] [2023-01-28 03:45:38,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:38,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 03:45:38,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:38,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 03:45:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=761, Unknown=7, NotChecked=56, Total=930 [2023-01-28 03:45:38,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:45:38,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 522 flow. Second operand has 31 states, 31 states have (on average 54.645161290322584) internal successors, (1694), 31 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:38,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:38,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:45:38,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:39,332 INFO L130 PetriNetUnfolder]: 182/321 cut-off events. [2023-01-28 03:45:39,332 INFO L131 PetriNetUnfolder]: For 1842/1842 co-relation queries the response was YES. [2023-01-28 03:45:39,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1810 conditions, 321 events. 182/321 cut-off events. For 1842/1842 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1065 event pairs, 11 based on Foata normal form. 1/321 useless extension candidates. Maximal degree in co-relation 1758. Up to 187 conditions per place. [2023-01-28 03:45:39,335 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 65 selfloop transitions, 40 changer transitions 1/106 dead transitions. [2023-01-28 03:45:39,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 991 flow [2023-01-28 03:45:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 03:45:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 03:45:39,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 930 transitions. [2023-01-28 03:45:39,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2821601941747573 [2023-01-28 03:45:39,340 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 930 transitions. [2023-01-28 03:45:39,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 930 transitions. [2023-01-28 03:45:39,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:39,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 930 transitions. [2023-01-28 03:45:39,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.125) internal successors, (930), 16 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:39,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:39,348 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:39,348 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 522 flow. Second operand 16 states and 930 transitions. [2023-01-28 03:45:39,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 991 flow [2023-01-28 03:45:39,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 106 transitions, 924 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-01-28 03:45:39,356 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 726 flow [2023-01-28 03:45:39,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=726, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2023-01-28 03:45:39,357 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-01-28 03:45:39,357 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 726 flow [2023-01-28 03:45:39,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 54.645161290322584) internal successors, (1694), 31 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:39,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:39,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:39,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 03:45:39,563 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:39,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1564132795, now seen corresponding path program 12 times [2023-01-28 03:45:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:39,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326270591] [2023-01-28 03:45:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:40,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:40,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326270591] [2023-01-28 03:45:40,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326270591] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:40,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879938040] [2023-01-28 03:45:40,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:45:40,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:40,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:40,057 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:40,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 03:45:40,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 03:45:40,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:40,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 03:45:40,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:40,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:40,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:40,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 44 [2023-01-28 03:45:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:40,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879938040] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:40,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:40,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-01-28 03:45:40,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888320033] [2023-01-28 03:45:40,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:40,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 03:45:40,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 03:45:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-01-28 03:45:40,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 03:45:40,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 726 flow. Second operand has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:40,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:40,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 03:45:40,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:40,844 INFO L130 PetriNetUnfolder]: 270/480 cut-off events. [2023-01-28 03:45:40,844 INFO L131 PetriNetUnfolder]: For 2965/2965 co-relation queries the response was YES. [2023-01-28 03:45:40,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 480 events. 270/480 cut-off events. For 2965/2965 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1789 event pairs, 29 based on Foata normal form. 2/481 useless extension candidates. Maximal degree in co-relation 2770. Up to 317 conditions per place. [2023-01-28 03:45:40,849 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 95 selfloop transitions, 39 changer transitions 2/136 dead transitions. [2023-01-28 03:45:40,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1436 flow [2023-01-28 03:45:40,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 03:45:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 03:45:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1098 transitions. [2023-01-28 03:45:40,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-28 03:45:40,851 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1098 transitions. [2023-01-28 03:45:40,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1098 transitions. [2023-01-28 03:45:40,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:40,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1098 transitions. [2023-01-28 03:45:40,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 78.42857142857143) internal successors, (1098), 14 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:40,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:40,857 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:40,857 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 726 flow. Second operand 14 states and 1098 transitions. [2023-01-28 03:45:40,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1436 flow [2023-01-28 03:45:40,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 136 transitions, 1295 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-01-28 03:45:40,868 INFO L231 Difference]: Finished difference. Result has 102 places, 93 transitions, 1004 flow [2023-01-28 03:45:40,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1004, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2023-01-28 03:45:40,868 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-01-28 03:45:40,868 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 1004 flow [2023-01-28 03:45:40,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:40,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:40,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:40,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:41,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:41,076 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:41,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:41,077 INFO L85 PathProgramCache]: Analyzing trace with hash -701418181, now seen corresponding path program 13 times [2023-01-28 03:45:41,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:41,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091383741] [2023-01-28 03:45:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:41,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:41,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:41,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091383741] [2023-01-28 03:45:41,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091383741] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:41,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259769556] [2023-01-28 03:45:41,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:45:41,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:41,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:41,758 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:41,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 03:45:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:41,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 03:45:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:41,991 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:45:41,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:41,992 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 31 treesize of output 14 [2023-01-28 03:45:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:42,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:42,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:42,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 44 [2023-01-28 03:45:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:42,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259769556] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:42,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:42,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 18 [2023-01-28 03:45:42,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510526532] [2023-01-28 03:45:42,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:42,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 03:45:42,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:42,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 03:45:42,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-28 03:45:42,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:45:42,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 1004 flow. Second operand has 20 states, 20 states have (on average 62.1) internal successors, (1242), 20 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:42,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:42,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:45:42,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:42,729 INFO L130 PetriNetUnfolder]: 302/538 cut-off events. [2023-01-28 03:45:42,729 INFO L131 PetriNetUnfolder]: For 3587/3587 co-relation queries the response was YES. [2023-01-28 03:45:42,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 538 events. 302/538 cut-off events. For 3587/3587 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2088 event pairs, 47 based on Foata normal form. 2/539 useless extension candidates. Maximal degree in co-relation 3144. Up to 408 conditions per place. [2023-01-28 03:45:42,735 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 96 selfloop transitions, 35 changer transitions 2/133 dead transitions. [2023-01-28 03:45:42,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 1484 flow [2023-01-28 03:45:42,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 03:45:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 03:45:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1045 transitions. [2023-01-28 03:45:42,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170509708737864 [2023-01-28 03:45:42,737 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1045 transitions. [2023-01-28 03:45:42,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1045 transitions. [2023-01-28 03:45:42,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:42,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1045 transitions. [2023-01-28 03:45:42,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.3125) internal successors, (1045), 16 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:42,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:42,745 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:42,745 INFO L175 Difference]: Start difference. First operand has 102 places, 93 transitions, 1004 flow. Second operand 16 states and 1045 transitions. [2023-01-28 03:45:42,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 1484 flow [2023-01-28 03:45:42,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 133 transitions, 1329 flow, removed 71 selfloop flow, removed 3 redundant places. [2023-01-28 03:45:42,760 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 1013 flow [2023-01-28 03:45:42,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1013, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2023-01-28 03:45:42,761 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 95 predicate places. [2023-01-28 03:45:42,761 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 1013 flow [2023-01-28 03:45:42,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.1) internal successors, (1242), 20 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:42,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:42,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:42,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:42,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 03:45:42,968 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:42,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:42,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1056177927, now seen corresponding path program 14 times [2023-01-28 03:45:42,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:42,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420660175] [2023-01-28 03:45:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:42,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:43,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:43,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420660175] [2023-01-28 03:45:43,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420660175] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:43,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179756370] [2023-01-28 03:45:43,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:45:43,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:43,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:43,527 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:43,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 03:45:43,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:45:43,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:43,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 03:45:43,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:43,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:43,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:43,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 03:45:43,947 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 03:45:43,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 03:45:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:44,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179756370] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:44,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:44,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 17 [2023-01-28 03:45:44,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142685453] [2023-01-28 03:45:44,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:44,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 03:45:44,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:44,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 03:45:44,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-01-28 03:45:44,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:45:44,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 1013 flow. Second operand has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:44,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:44,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:45:44,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:44,382 INFO L130 PetriNetUnfolder]: 374/666 cut-off events. [2023-01-28 03:45:44,382 INFO L131 PetriNetUnfolder]: For 4600/4600 co-relation queries the response was YES. [2023-01-28 03:45:44,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3907 conditions, 666 events. 374/666 cut-off events. For 4600/4600 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2769 event pairs, 71 based on Foata normal form. 2/667 useless extension candidates. Maximal degree in co-relation 3841. Up to 536 conditions per place. [2023-01-28 03:45:44,388 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 115 selfloop transitions, 30 changer transitions 2/147 dead transitions. [2023-01-28 03:45:44,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 147 transitions, 1749 flow [2023-01-28 03:45:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 03:45:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 03:45:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1043 transitions. [2023-01-28 03:45:44,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31644417475728154 [2023-01-28 03:45:44,390 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1043 transitions. [2023-01-28 03:45:44,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1043 transitions. [2023-01-28 03:45:44,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:44,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1043 transitions. [2023-01-28 03:45:44,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.1875) internal successors, (1043), 16 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:44,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:44,395 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:44,396 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 1013 flow. Second operand 16 states and 1043 transitions. [2023-01-28 03:45:44,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 147 transitions, 1749 flow [2023-01-28 03:45:44,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 147 transitions, 1647 flow, removed 27 selfloop flow, removed 12 redundant places. [2023-01-28 03:45:44,410 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1287 flow [2023-01-28 03:45:44,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1287, PETRI_PLACES=122, PETRI_TRANSITIONS=111} [2023-01-28 03:45:44,411 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2023-01-28 03:45:44,411 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1287 flow [2023-01-28 03:45:44,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:44,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:44,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:44,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-01-28 03:45:44,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:44,617 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:44,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:44,617 INFO L85 PathProgramCache]: Analyzing trace with hash -425348409, now seen corresponding path program 15 times [2023-01-28 03:45:44,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:44,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828487446] [2023-01-28 03:45:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:45,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:45,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828487446] [2023-01-28 03:45:45,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828487446] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:45,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979391567] [2023-01-28 03:45:45,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:45:45,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:45,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:45,129 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:45,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 03:45:45,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 03:45:45,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:45,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 03:45:45,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:45,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:45,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:45,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 03:45:45,672 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 03:45:45,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 03:45:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:45,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979391567] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:45,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:45,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-01-28 03:45:45,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852089798] [2023-01-28 03:45:45,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:45,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 03:45:45,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:45,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 03:45:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-01-28 03:45:45,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:45:45,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 1287 flow. Second operand has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:45,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:45,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:45:45,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:46,405 INFO L130 PetriNetUnfolder]: 460/822 cut-off events. [2023-01-28 03:45:46,405 INFO L131 PetriNetUnfolder]: For 6438/6438 co-relation queries the response was YES. [2023-01-28 03:45:46,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 822 events. 460/822 cut-off events. For 6438/6438 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3679 event pairs, 94 based on Foata normal form. 2/823 useless extension candidates. Maximal degree in co-relation 4883. Up to 663 conditions per place. [2023-01-28 03:45:46,413 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 134 selfloop transitions, 37 changer transitions 2/173 dead transitions. [2023-01-28 03:45:46,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 173 transitions, 2127 flow [2023-01-28 03:45:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 03:45:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 03:45:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1241 transitions. [2023-01-28 03:45:46,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170669391926418 [2023-01-28 03:45:46,417 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1241 transitions. [2023-01-28 03:45:46,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1241 transitions. [2023-01-28 03:45:46,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:46,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1241 transitions. [2023-01-28 03:45:46,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.3157894736842) internal successors, (1241), 19 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:46,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:46,423 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:46,423 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1287 flow. Second operand 19 states and 1241 transitions. [2023-01-28 03:45:46,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 173 transitions, 2127 flow [2023-01-28 03:45:46,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 173 transitions, 1875 flow, removed 113 selfloop flow, removed 8 redundant places. [2023-01-28 03:45:46,446 INFO L231 Difference]: Finished difference. Result has 137 places, 125 transitions, 1438 flow [2023-01-28 03:45:46,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1438, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2023-01-28 03:45:46,446 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2023-01-28 03:45:46,447 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 1438 flow [2023-01-28 03:45:46,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:46,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:46,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:46,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:46,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:46,653 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:46,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:46,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2097113607, now seen corresponding path program 16 times [2023-01-28 03:45:46,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:46,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990329545] [2023-01-28 03:45:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:46,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:47,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:47,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990329545] [2023-01-28 03:45:47,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990329545] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:47,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460397321] [2023-01-28 03:45:47,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:45:47,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:47,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:47,174 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:47,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 03:45:47,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:45:47,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:47,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 03:45:47,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:47,474 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:45:47,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:47,483 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 31 treesize of output 14 [2023-01-28 03:45:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:47,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:47,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:47,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 03:45:47,692 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 03:45:47,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 03:45:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:47,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460397321] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:47,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:47,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-01-28 03:45:47,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214087397] [2023-01-28 03:45:47,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:47,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 03:45:47,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:47,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 03:45:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-01-28 03:45:47,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:45:47,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 1438 flow. Second operand has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:47,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:47,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:45:47,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:48,319 INFO L130 PetriNetUnfolder]: 532/953 cut-off events. [2023-01-28 03:45:48,319 INFO L131 PetriNetUnfolder]: For 7050/7050 co-relation queries the response was YES. [2023-01-28 03:45:48,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 953 events. 532/953 cut-off events. For 7050/7050 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4488 event pairs, 127 based on Foata normal form. 2/954 useless extension candidates. Maximal degree in co-relation 5526. Up to 806 conditions per place. [2023-01-28 03:45:48,326 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 140 selfloop transitions, 32 changer transitions 3/175 dead transitions. [2023-01-28 03:45:48,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 175 transitions, 2175 flow [2023-01-28 03:45:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 03:45:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 03:45:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 985 transitions. [2023-01-28 03:45:48,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3187702265372168 [2023-01-28 03:45:48,328 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 985 transitions. [2023-01-28 03:45:48,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 985 transitions. [2023-01-28 03:45:48,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:48,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 985 transitions. [2023-01-28 03:45:48,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 65.66666666666667) internal successors, (985), 15 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:48,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:48,333 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:48,333 INFO L175 Difference]: Start difference. First operand has 137 places, 125 transitions, 1438 flow. Second operand 15 states and 985 transitions. [2023-01-28 03:45:48,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 175 transitions, 2175 flow [2023-01-28 03:45:48,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 175 transitions, 1910 flow, removed 109 selfloop flow, removed 12 redundant places. [2023-01-28 03:45:48,359 INFO L231 Difference]: Finished difference. Result has 143 places, 135 transitions, 1486 flow [2023-01-28 03:45:48,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1486, PETRI_PLACES=143, PETRI_TRANSITIONS=135} [2023-01-28 03:45:48,359 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-01-28 03:45:48,359 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 135 transitions, 1486 flow [2023-01-28 03:45:48,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:48,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:48,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:48,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:48,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:48,566 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:48,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:48,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1659998111, now seen corresponding path program 17 times [2023-01-28 03:45:48,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:48,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804827747] [2023-01-28 03:45:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:48,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:49,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:49,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804827747] [2023-01-28 03:45:49,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804827747] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:49,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003678668] [2023-01-28 03:45:49,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:45:49,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:49,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:49,100 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:49,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 03:45:49,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:45:49,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 03:45:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:49,396 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:45:49,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:49,398 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 31 treesize of output 14 [2023-01-28 03:45:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:49,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:49,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:49,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 03:45:49,574 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 03:45:49,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 03:45:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:49,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003678668] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:49,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:49,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-01-28 03:45:49,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214729639] [2023-01-28 03:45:49,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:49,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 03:45:49,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:49,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 03:45:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-01-28 03:45:49,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:45:49,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 135 transitions, 1486 flow. Second operand has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:49,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:49,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:45:49,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:50,168 INFO L130 PetriNetUnfolder]: 564/1011 cut-off events. [2023-01-28 03:45:50,168 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-01-28 03:45:50,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5706 conditions, 1011 events. 564/1011 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4841 event pairs, 135 based on Foata normal form. 2/1012 useless extension candidates. Maximal degree in co-relation 5628. Up to 896 conditions per place. [2023-01-28 03:45:50,176 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 144 selfloop transitions, 26 changer transitions 2/172 dead transitions. [2023-01-28 03:45:50,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 172 transitions, 2082 flow [2023-01-28 03:45:50,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 03:45:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 03:45:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 916 transitions. [2023-01-28 03:45:50,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31761442441054094 [2023-01-28 03:45:50,178 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 916 transitions. [2023-01-28 03:45:50,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 916 transitions. [2023-01-28 03:45:50,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:50,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 916 transitions. [2023-01-28 03:45:50,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.42857142857143) internal successors, (916), 14 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:50,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:50,183 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:50,183 INFO L175 Difference]: Start difference. First operand has 143 places, 135 transitions, 1486 flow. Second operand 14 states and 916 transitions. [2023-01-28 03:45:50,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 172 transitions, 2082 flow [2023-01-28 03:45:50,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 172 transitions, 1928 flow, removed 64 selfloop flow, removed 8 redundant places. [2023-01-28 03:45:50,210 INFO L231 Difference]: Finished difference. Result has 150 places, 139 transitions, 1510 flow [2023-01-28 03:45:50,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1510, PETRI_PLACES=150, PETRI_TRANSITIONS=139} [2023-01-28 03:45:50,211 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2023-01-28 03:45:50,211 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 139 transitions, 1510 flow [2023-01-28 03:45:50,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:50,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:50,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:50,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:50,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:50,417 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:50,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2101988531, now seen corresponding path program 18 times [2023-01-28 03:45:50,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:50,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852232318] [2023-01-28 03:45:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:50,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:50,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:50,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852232318] [2023-01-28 03:45:50,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852232318] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:50,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114416029] [2023-01-28 03:45:50,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:45:50,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:50,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:50,955 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:50,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 03:45:51,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 03:45:51,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:51,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 03:45:51,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:51,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:51,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:51,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 03:45:51,391 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 03:45:51,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 03:45:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:51,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114416029] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:51,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:51,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-01-28 03:45:51,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197139588] [2023-01-28 03:45:51,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:51,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 03:45:51,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:51,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 03:45:51,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-01-28 03:45:51,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:45:51,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 139 transitions, 1510 flow. Second operand has 25 states, 25 states have (on average 61.92) internal successors, (1548), 25 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:51,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:51,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:45:51,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:51,946 INFO L130 PetriNetUnfolder]: 626/1123 cut-off events. [2023-01-28 03:45:51,946 INFO L131 PetriNetUnfolder]: For 8749/8749 co-relation queries the response was YES. [2023-01-28 03:45:51,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6436 conditions, 1123 events. 626/1123 cut-off events. For 8749/8749 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5529 event pairs, 163 based on Foata normal form. 2/1124 useless extension candidates. Maximal degree in co-relation 6355. Up to 995 conditions per place. [2023-01-28 03:45:51,954 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 145 selfloop transitions, 34 changer transitions 2/181 dead transitions. [2023-01-28 03:45:51,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 181 transitions, 2298 flow [2023-01-28 03:45:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 03:45:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 03:45:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 916 transitions. [2023-01-28 03:45:51,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31761442441054094 [2023-01-28 03:45:51,955 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 916 transitions. [2023-01-28 03:45:51,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 916 transitions. [2023-01-28 03:45:51,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:51,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 916 transitions. [2023-01-28 03:45:51,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.42857142857143) internal successors, (916), 14 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:51,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:51,959 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:51,960 INFO L175 Difference]: Start difference. First operand has 150 places, 139 transitions, 1510 flow. Second operand 14 states and 916 transitions. [2023-01-28 03:45:51,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 181 transitions, 2298 flow [2023-01-28 03:45:51,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 181 transitions, 2180 flow, removed 43 selfloop flow, removed 10 redundant places. [2023-01-28 03:45:51,993 INFO L231 Difference]: Finished difference. Result has 157 places, 149 transitions, 1780 flow [2023-01-28 03:45:51,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1780, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2023-01-28 03:45:51,994 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-01-28 03:45:51,994 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 1780 flow [2023-01-28 03:45:51,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.92) internal successors, (1548), 25 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:51,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:51,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:52,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:52,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 03:45:52,200 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:52,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:52,200 INFO L85 PathProgramCache]: Analyzing trace with hash 556637051, now seen corresponding path program 19 times [2023-01-28 03:45:52,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:52,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61513347] [2023-01-28 03:45:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:52,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:52,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:52,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61513347] [2023-01-28 03:45:52,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61513347] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:52,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194906256] [2023-01-28 03:45:52,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:45:52,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:52,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:52,849 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:52,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 03:45:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:52,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 03:45:52,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:53,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:53,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:53,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-28 03:45:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:53,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194906256] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:53,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:53,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 25 [2023-01-28 03:45:53,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082885422] [2023-01-28 03:45:53,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:53,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 03:45:53,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:53,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 03:45:53,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2023-01-28 03:45:53,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:45:53,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 1780 flow. Second operand has 27 states, 27 states have (on average 54.81481481481482) internal successors, (1480), 27 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:53,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:53,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:45:53,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:54,030 INFO L130 PetriNetUnfolder]: 688/1235 cut-off events. [2023-01-28 03:45:54,030 INFO L131 PetriNetUnfolder]: For 11490/11490 co-relation queries the response was YES. [2023-01-28 03:45:54,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7358 conditions, 1235 events. 688/1235 cut-off events. For 11490/11490 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6265 event pairs, 165 based on Foata normal form. 2/1236 useless extension candidates. Maximal degree in co-relation 7272. Up to 993 conditions per place. [2023-01-28 03:45:54,040 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 135 selfloop transitions, 57 changer transitions 2/194 dead transitions. [2023-01-28 03:45:54,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 194 transitions, 2631 flow [2023-01-28 03:45:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 03:45:54,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 03:45:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 983 transitions. [2023-01-28 03:45:54,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2806967447173044 [2023-01-28 03:45:54,043 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 983 transitions. [2023-01-28 03:45:54,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 983 transitions. [2023-01-28 03:45:54,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:54,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 983 transitions. [2023-01-28 03:45:54,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.8235294117647) internal successors, (983), 17 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:54,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:54,048 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:54,049 INFO L175 Difference]: Start difference. First operand has 157 places, 149 transitions, 1780 flow. Second operand 17 states and 983 transitions. [2023-01-28 03:45:54,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 194 transitions, 2631 flow [2023-01-28 03:45:54,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 194 transitions, 2398 flow, removed 105 selfloop flow, removed 7 redundant places. [2023-01-28 03:45:54,086 INFO L231 Difference]: Finished difference. Result has 170 places, 160 transitions, 2024 flow [2023-01-28 03:45:54,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2024, PETRI_PLACES=170, PETRI_TRANSITIONS=160} [2023-01-28 03:45:54,086 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 149 predicate places. [2023-01-28 03:45:54,086 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 160 transitions, 2024 flow [2023-01-28 03:45:54,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.81481481481482) internal successors, (1480), 27 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:54,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:54,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:54,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-28 03:45:54,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-28 03:45:54,292 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:54,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1024293669, now seen corresponding path program 20 times [2023-01-28 03:45:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:54,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358942513] [2023-01-28 03:45:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:54,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:45:54,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:54,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358942513] [2023-01-28 03:45:54,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358942513] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:54,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204319969] [2023-01-28 03:45:54,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:45:54,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:54,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:54,769 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:54,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 03:45:54,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:45:54,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:54,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 03:45:54,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:55,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:55,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:55,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 03:45:55,188 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 03:45:55,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 03:45:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:55,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204319969] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:55,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:55,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 21 [2023-01-28 03:45:55,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612392071] [2023-01-28 03:45:55,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:55,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 03:45:55,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:55,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 03:45:55,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-01-28 03:45:55,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:45:55,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 160 transitions, 2024 flow. Second operand has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:55,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:55,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:45:55,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:55,865 INFO L130 PetriNetUnfolder]: 754/1353 cut-off events. [2023-01-28 03:45:55,865 INFO L131 PetriNetUnfolder]: For 14228/14228 co-relation queries the response was YES. [2023-01-28 03:45:55,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8245 conditions, 1353 events. 754/1353 cut-off events. For 14228/14228 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7022 event pairs, 201 based on Foata normal form. 2/1355 useless extension candidates. Maximal degree in co-relation 8153. Up to 1204 conditions per place. [2023-01-28 03:45:55,878 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 172 selfloop transitions, 32 changer transitions 2/206 dead transitions. [2023-01-28 03:45:55,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 206 transitions, 2973 flow [2023-01-28 03:45:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 03:45:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 03:45:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1041 transitions. [2023-01-28 03:45:55,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3158373786407767 [2023-01-28 03:45:55,880 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1041 transitions. [2023-01-28 03:45:55,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1041 transitions. [2023-01-28 03:45:55,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:55,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1041 transitions. [2023-01-28 03:45:55,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.0625) internal successors, (1041), 16 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:55,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:55,884 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:55,884 INFO L175 Difference]: Start difference. First operand has 170 places, 160 transitions, 2024 flow. Second operand 16 states and 1041 transitions. [2023-01-28 03:45:55,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 206 transitions, 2973 flow [2023-01-28 03:45:55,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 206 transitions, 2665 flow, removed 129 selfloop flow, removed 11 redundant places. [2023-01-28 03:45:55,937 INFO L231 Difference]: Finished difference. Result has 177 places, 172 transitions, 2182 flow [2023-01-28 03:45:55,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2182, PETRI_PLACES=177, PETRI_TRANSITIONS=172} [2023-01-28 03:45:55,937 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2023-01-28 03:45:55,937 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 172 transitions, 2182 flow [2023-01-28 03:45:55,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:55,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:55,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:55,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:56,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:56,143 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:56,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:56,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1652983725, now seen corresponding path program 21 times [2023-01-28 03:45:56,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:56,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323489654] [2023-01-28 03:45:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:56,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:56,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:56,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323489654] [2023-01-28 03:45:56,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323489654] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:56,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316844407] [2023-01-28 03:45:56,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:45:56,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:56,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:56,513 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:56,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 03:45:56,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 03:45:56,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:56,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 03:45:56,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:56,750 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:45:56,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:56,752 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 31 treesize of output 14 [2023-01-28 03:45:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:56,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:56,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:56,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-28 03:45:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:56,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316844407] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:56,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:56,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 14 [2023-01-28 03:45:56,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308168601] [2023-01-28 03:45:56,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:56,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 03:45:56,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 03:45:56,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-01-28 03:45:56,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-01-28 03:45:56,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 172 transitions, 2182 flow. Second operand has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:56,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:56,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-01-28 03:45:56,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:57,335 INFO L130 PetriNetUnfolder]: 802/1441 cut-off events. [2023-01-28 03:45:57,335 INFO L131 PetriNetUnfolder]: For 13951/13951 co-relation queries the response was YES. [2023-01-28 03:45:57,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8558 conditions, 1441 events. 802/1441 cut-off events. For 13951/13951 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7649 event pairs, 217 based on Foata normal form. 2/1443 useless extension candidates. Maximal degree in co-relation 8464. Up to 1285 conditions per place. [2023-01-28 03:45:57,345 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 177 selfloop transitions, 37 changer transitions 3/217 dead transitions. [2023-01-28 03:45:57,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 217 transitions, 2996 flow [2023-01-28 03:45:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 03:45:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 03:45:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1091 transitions. [2023-01-28 03:45:57,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35307443365695795 [2023-01-28 03:45:57,347 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1091 transitions. [2023-01-28 03:45:57,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1091 transitions. [2023-01-28 03:45:57,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:57,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1091 transitions. [2023-01-28 03:45:57,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.73333333333333) internal successors, (1091), 15 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:57,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:57,352 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:57,352 INFO L175 Difference]: Start difference. First operand has 177 places, 172 transitions, 2182 flow. Second operand 15 states and 1091 transitions. [2023-01-28 03:45:57,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 217 transitions, 2996 flow [2023-01-28 03:45:57,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 217 transitions, 2681 flow, removed 143 selfloop flow, removed 9 redundant places. [2023-01-28 03:45:57,407 INFO L231 Difference]: Finished difference. Result has 184 places, 178 transitions, 2162 flow [2023-01-28 03:45:57,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2162, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2023-01-28 03:45:57,407 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 163 predicate places. [2023-01-28 03:45:57,407 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 2162 flow [2023-01-28 03:45:57,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:57,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:57,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:57,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:57,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:57,613 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:57,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:57,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2106113381, now seen corresponding path program 22 times [2023-01-28 03:45:57,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:57,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276712943] [2023-01-28 03:45:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:57,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:57,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:57,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276712943] [2023-01-28 03:45:57,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276712943] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:57,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261765630] [2023-01-28 03:45:57,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:45:57,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:57,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:57,969 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:57,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 03:45:58,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:45:58,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:58,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 03:45:58,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:58,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:58,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:58,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-28 03:45:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:58,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261765630] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:58,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:58,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-01-28 03:45:58,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596184820] [2023-01-28 03:45:58,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:58,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 03:45:58,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 03:45:58,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-01-28 03:45:58,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 03:45:58,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 2162 flow. Second operand has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:58,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:58,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 03:45:58,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:45:58,705 INFO L130 PetriNetUnfolder]: 842/1510 cut-off events. [2023-01-28 03:45:58,705 INFO L131 PetriNetUnfolder]: For 13580/13580 co-relation queries the response was YES. [2023-01-28 03:45:58,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8763 conditions, 1510 events. 842/1510 cut-off events. For 13580/13580 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8091 event pairs, 223 based on Foata normal form. 1/1511 useless extension candidates. Maximal degree in co-relation 8668. Up to 1408 conditions per place. [2023-01-28 03:45:58,714 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 172 selfloop transitions, 32 changer transitions 1/205 dead transitions. [2023-01-28 03:45:58,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 205 transitions, 2888 flow [2023-01-28 03:45:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 03:45:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 03:45:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 776 transitions. [2023-01-28 03:45:58,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3766990291262136 [2023-01-28 03:45:58,716 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 776 transitions. [2023-01-28 03:45:58,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 776 transitions. [2023-01-28 03:45:58,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:45:58,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 776 transitions. [2023-01-28 03:45:58,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.6) internal successors, (776), 10 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:58,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:58,718 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:58,718 INFO L175 Difference]: Start difference. First operand has 184 places, 178 transitions, 2162 flow. Second operand 10 states and 776 transitions. [2023-01-28 03:45:58,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 205 transitions, 2888 flow [2023-01-28 03:45:58,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 205 transitions, 2671 flow, removed 86 selfloop flow, removed 10 redundant places. [2023-01-28 03:45:58,761 INFO L231 Difference]: Finished difference. Result has 186 places, 187 transitions, 2289 flow [2023-01-28 03:45:58,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2289, PETRI_PLACES=186, PETRI_TRANSITIONS=187} [2023-01-28 03:45:58,762 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2023-01-28 03:45:58,762 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 187 transitions, 2289 flow [2023-01-28 03:45:58,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:58,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:45:58,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:45:58,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 03:45:58,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 03:45:58,963 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:45:58,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:45:58,964 INFO L85 PathProgramCache]: Analyzing trace with hash -612048045, now seen corresponding path program 23 times [2023-01-28 03:45:58,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:45:58,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618697237] [2023-01-28 03:45:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:45:58,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:45:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:45:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:59,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:45:59,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618697237] [2023-01-28 03:45:59,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618697237] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:45:59,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039741533] [2023-01-28 03:45:59,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:45:59,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:45:59,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:45:59,337 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:45:59,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 03:45:59,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:45:59,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:45:59,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 03:45:59,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:45:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:45:59,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:45:59,736 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:45:59,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-28 03:45:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:45:59,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039741533] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:45:59,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:45:59,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 14 [2023-01-28 03:45:59,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213882791] [2023-01-28 03:45:59,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:45:59,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 03:45:59,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:45:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 03:45:59,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-01-28 03:45:59,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-01-28 03:45:59,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 187 transitions, 2289 flow. Second operand has 16 states, 16 states have (on average 69.1875) internal successors, (1107), 16 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:45:59,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:45:59,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-01-28 03:45:59,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:00,212 INFO L130 PetriNetUnfolder]: 864/1549 cut-off events. [2023-01-28 03:46:00,212 INFO L131 PetriNetUnfolder]: For 13315/13315 co-relation queries the response was YES. [2023-01-28 03:46:00,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8872 conditions, 1549 events. 864/1549 cut-off events. For 13315/13315 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8374 event pairs, 257 based on Foata normal form. 1/1550 useless extension candidates. Maximal degree in co-relation 8775. Up to 1473 conditions per place. [2023-01-28 03:46:00,222 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 181 selfloop transitions, 26 changer transitions 1/208 dead transitions. [2023-01-28 03:46:00,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 208 transitions, 2945 flow [2023-01-28 03:46:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 03:46:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 03:46:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 722 transitions. [2023-01-28 03:46:00,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3504854368932039 [2023-01-28 03:46:00,230 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 722 transitions. [2023-01-28 03:46:00,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 722 transitions. [2023-01-28 03:46:00,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:00,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 722 transitions. [2023-01-28 03:46:00,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 72.2) internal successors, (722), 10 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:00,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:00,236 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:00,236 INFO L175 Difference]: Start difference. First operand has 186 places, 187 transitions, 2289 flow. Second operand 10 states and 722 transitions. [2023-01-28 03:46:00,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 208 transitions, 2945 flow [2023-01-28 03:46:00,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 208 transitions, 2689 flow, removed 112 selfloop flow, removed 7 redundant places. [2023-01-28 03:46:00,301 INFO L231 Difference]: Finished difference. Result has 191 places, 192 transitions, 2288 flow [2023-01-28 03:46:00,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2288, PETRI_PLACES=191, PETRI_TRANSITIONS=192} [2023-01-28 03:46:00,307 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2023-01-28 03:46:00,307 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 192 transitions, 2288 flow [2023-01-28 03:46:00,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.1875) internal successors, (1107), 16 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:00,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:00,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:00,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 03:46:00,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 03:46:00,513 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:00,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:00,513 INFO L85 PathProgramCache]: Analyzing trace with hash -554497589, now seen corresponding path program 24 times [2023-01-28 03:46:00,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:00,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584171020] [2023-01-28 03:46:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:00,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:01,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:01,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584171020] [2023-01-28 03:46:01,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584171020] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:01,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962432232] [2023-01-28 03:46:01,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:46:01,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:01,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:01,029 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:01,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 03:46:01,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 03:46:01,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 03:46:01,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:01,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:01,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:01,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 03:46:01,431 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 03:46:01,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 03:46:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:01,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962432232] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:01,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:01,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-01-28 03:46:01,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274708550] [2023-01-28 03:46:01,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:01,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 03:46:01,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 03:46:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-01-28 03:46:01,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:46:01,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 192 transitions, 2288 flow. Second operand has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:01,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:01,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:46:01,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:02,056 INFO L130 PetriNetUnfolder]: 933/1673 cut-off events. [2023-01-28 03:46:02,056 INFO L131 PetriNetUnfolder]: For 16706/16706 co-relation queries the response was YES. [2023-01-28 03:46:02,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9864 conditions, 1673 events. 933/1673 cut-off events. For 16706/16706 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9218 event pairs, 268 based on Foata normal form. 2/1675 useless extension candidates. Maximal degree in co-relation 9765. Up to 1542 conditions per place. [2023-01-28 03:46:02,069 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 203 selfloop transitions, 39 changer transitions 2/244 dead transitions. [2023-01-28 03:46:02,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 244 transitions, 3420 flow [2023-01-28 03:46:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 03:46:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 03:46:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1045 transitions. [2023-01-28 03:46:02,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170509708737864 [2023-01-28 03:46:02,079 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1045 transitions. [2023-01-28 03:46:02,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1045 transitions. [2023-01-28 03:46:02,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:02,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1045 transitions. [2023-01-28 03:46:02,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.3125) internal successors, (1045), 16 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:02,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:02,083 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:02,083 INFO L175 Difference]: Start difference. First operand has 191 places, 192 transitions, 2288 flow. Second operand 16 states and 1045 transitions. [2023-01-28 03:46:02,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 244 transitions, 3420 flow [2023-01-28 03:46:02,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 244 transitions, 3271 flow, removed 57 selfloop flow, removed 7 redundant places. [2023-01-28 03:46:02,146 INFO L231 Difference]: Finished difference. Result has 205 places, 211 transitions, 2754 flow [2023-01-28 03:46:02,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2754, PETRI_PLACES=205, PETRI_TRANSITIONS=211} [2023-01-28 03:46:02,149 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2023-01-28 03:46:02,149 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 211 transitions, 2754 flow [2023-01-28 03:46:02,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:02,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:02,149 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:02,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 03:46:02,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 03:46:02,355 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:02,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash -16642011, now seen corresponding path program 25 times [2023-01-28 03:46:02,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:02,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155745054] [2023-01-28 03:46:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:02,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:02,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:02,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155745054] [2023-01-28 03:46:02,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155745054] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:02,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739313910] [2023-01-28 03:46:02,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:46:02,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:02,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:02,818 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:02,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 03:46:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:02,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 03:46:02,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:03,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:03,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:03,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 03:46:03,208 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 03:46:03,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 03:46:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:03,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739313910] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:03,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:03,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-01-28 03:46:03,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44578993] [2023-01-28 03:46:03,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:03,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 03:46:03,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:03,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 03:46:03,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-01-28 03:46:03,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:46:03,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 211 transitions, 2754 flow. Second operand has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:03,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:03,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:46:03,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:04,070 INFO L130 PetriNetUnfolder]: 981/1761 cut-off events. [2023-01-28 03:46:04,070 INFO L131 PetriNetUnfolder]: For 20633/20633 co-relation queries the response was YES. [2023-01-28 03:46:04,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10753 conditions, 1761 events. 981/1761 cut-off events. For 20633/20633 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9804 event pairs, 278 based on Foata normal form. 2/1763 useless extension candidates. Maximal degree in co-relation 10648. Up to 1598 conditions per place. [2023-01-28 03:46:04,081 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 212 selfloop transitions, 45 changer transitions 3/260 dead transitions. [2023-01-28 03:46:04,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 260 transitions, 3733 flow [2023-01-28 03:46:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 03:46:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 03:46:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1303 transitions. [2023-01-28 03:46:04,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3162621359223301 [2023-01-28 03:46:04,086 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1303 transitions. [2023-01-28 03:46:04,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1303 transitions. [2023-01-28 03:46:04,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:04,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1303 transitions. [2023-01-28 03:46:04,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.15) internal successors, (1303), 20 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:04,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 206.0) internal successors, (4326), 21 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:04,091 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 206.0) internal successors, (4326), 21 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:04,091 INFO L175 Difference]: Start difference. First operand has 205 places, 211 transitions, 2754 flow. Second operand 20 states and 1303 transitions. [2023-01-28 03:46:04,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 260 transitions, 3733 flow [2023-01-28 03:46:04,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 260 transitions, 3411 flow, removed 151 selfloop flow, removed 6 redundant places. [2023-01-28 03:46:04,181 INFO L231 Difference]: Finished difference. Result has 220 places, 217 transitions, 2788 flow [2023-01-28 03:46:04,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2788, PETRI_PLACES=220, PETRI_TRANSITIONS=217} [2023-01-28 03:46:04,182 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 199 predicate places. [2023-01-28 03:46:04,182 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 217 transitions, 2788 flow [2023-01-28 03:46:04,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:04,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:04,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:04,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-01-28 03:46:04,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:04,388 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:04,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash 687923611, now seen corresponding path program 26 times [2023-01-28 03:46:04,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:04,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048662113] [2023-01-28 03:46:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:04,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:04,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:04,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048662113] [2023-01-28 03:46:04,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048662113] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:04,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889365275] [2023-01-28 03:46:04,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:46:04,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:04,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:04,872 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:04,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 03:46:04,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:46:04,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:04,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 03:46:04,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:05,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:05,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:05,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 03:46:05,235 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 03:46:05,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 03:46:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:05,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889365275] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:05,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:05,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-01-28 03:46:05,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444808689] [2023-01-28 03:46:05,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:05,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 03:46:05,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:05,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 03:46:05,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-01-28 03:46:05,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:46:05,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 217 transitions, 2788 flow. Second operand has 24 states, 24 states have (on average 62.083333333333336) internal successors, (1490), 24 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:05,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:05,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:46:05,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:05,914 INFO L130 PetriNetUnfolder]: 1045/1877 cut-off events. [2023-01-28 03:46:05,914 INFO L131 PetriNetUnfolder]: For 23742/23742 co-relation queries the response was YES. [2023-01-28 03:46:05,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11497 conditions, 1877 events. 1045/1877 cut-off events. For 23742/23742 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10628 event pairs, 303 based on Foata normal form. 2/1879 useless extension candidates. Maximal degree in co-relation 11388. Up to 1706 conditions per place. [2023-01-28 03:46:05,926 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 237 selfloop transitions, 35 changer transitions 3/275 dead transitions. [2023-01-28 03:46:05,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 275 transitions, 3975 flow [2023-01-28 03:46:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 03:46:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 03:46:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1117 transitions. [2023-01-28 03:46:05,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3189605939463164 [2023-01-28 03:46:05,930 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1117 transitions. [2023-01-28 03:46:05,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1117 transitions. [2023-01-28 03:46:05,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:05,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1117 transitions. [2023-01-28 03:46:05,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:05,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:05,934 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:05,934 INFO L175 Difference]: Start difference. First operand has 220 places, 217 transitions, 2788 flow. Second operand 17 states and 1117 transitions. [2023-01-28 03:46:05,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 275 transitions, 3975 flow [2023-01-28 03:46:06,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 275 transitions, 3693 flow, removed 110 selfloop flow, removed 14 redundant places. [2023-01-28 03:46:06,005 INFO L231 Difference]: Finished difference. Result has 224 places, 227 transitions, 3000 flow [2023-01-28 03:46:06,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3000, PETRI_PLACES=224, PETRI_TRANSITIONS=227} [2023-01-28 03:46:06,006 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 203 predicate places. [2023-01-28 03:46:06,006 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 227 transitions, 3000 flow [2023-01-28 03:46:06,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.083333333333336) internal successors, (1490), 24 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:06,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:06,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:06,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 03:46:06,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:06,211 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:06,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:06,211 INFO L85 PathProgramCache]: Analyzing trace with hash -296912589, now seen corresponding path program 27 times [2023-01-28 03:46:06,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:06,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169026302] [2023-01-28 03:46:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:06,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:06,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:06,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169026302] [2023-01-28 03:46:06,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169026302] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:06,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643814477] [2023-01-28 03:46:06,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:46:06,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:06,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:06,839 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:06,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 03:46:07,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 03:46:07,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:07,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-28 03:46:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:07,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:46:07,109 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 [2023-01-28 03:46:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:46:07,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:07,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:07,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 73 [2023-01-28 03:46:07,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:07,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-01-28 03:46:07,447 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:46:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:07,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643814477] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:07,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:07,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2023-01-28 03:46:07,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155963562] [2023-01-28 03:46:07,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:07,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 03:46:07,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:07,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 03:46:07,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=757, Unknown=7, NotChecked=0, Total=870 [2023-01-28 03:46:07,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:46:07,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 227 transitions, 3000 flow. Second operand has 30 states, 30 states have (on average 54.6) internal successors, (1638), 30 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:07,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:07,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:46:07,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:08,475 INFO L130 PetriNetUnfolder]: 1107/1990 cut-off events. [2023-01-28 03:46:08,475 INFO L131 PetriNetUnfolder]: For 27625/27625 co-relation queries the response was YES. [2023-01-28 03:46:08,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12380 conditions, 1990 events. 1107/1990 cut-off events. For 27625/27625 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11464 event pairs, 309 based on Foata normal form. 1/1991 useless extension candidates. Maximal degree in co-relation 12268. Up to 1716 conditions per place. [2023-01-28 03:46:08,490 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 208 selfloop transitions, 62 changer transitions 1/271 dead transitions. [2023-01-28 03:46:08,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 271 transitions, 4204 flow [2023-01-28 03:46:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 03:46:08,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 03:46:08,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 878 transitions. [2023-01-28 03:46:08,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2841423948220065 [2023-01-28 03:46:08,492 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 878 transitions. [2023-01-28 03:46:08,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 878 transitions. [2023-01-28 03:46:08,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:08,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 878 transitions. [2023-01-28 03:46:08,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 58.53333333333333) internal successors, (878), 15 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:08,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:08,495 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:08,495 INFO L175 Difference]: Start difference. First operand has 224 places, 227 transitions, 3000 flow. Second operand 15 states and 878 transitions. [2023-01-28 03:46:08,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 271 transitions, 4204 flow [2023-01-28 03:46:08,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 271 transitions, 3814 flow, removed 177 selfloop flow, removed 10 redundant places. [2023-01-28 03:46:08,587 INFO L231 Difference]: Finished difference. Result has 231 places, 237 transitions, 3197 flow [2023-01-28 03:46:08,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3197, PETRI_PLACES=231, PETRI_TRANSITIONS=237} [2023-01-28 03:46:08,587 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 210 predicate places. [2023-01-28 03:46:08,587 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 237 transitions, 3197 flow [2023-01-28 03:46:08,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 54.6) internal successors, (1638), 30 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:08,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:08,588 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:08,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 03:46:08,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:08,793 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:08,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:08,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1732503731, now seen corresponding path program 28 times [2023-01-28 03:46:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:08,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500808676] [2023-01-28 03:46:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:08,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:09,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:09,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500808676] [2023-01-28 03:46:09,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500808676] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:09,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095195666] [2023-01-28 03:46:09,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:46:09,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:09,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:09,377 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:09,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 03:46:09,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:46:09,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:09,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 92 conjunts are in the unsatisfiable core [2023-01-28 03:46:09,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:09,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 03:46:09,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:46:09,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:46:09,659 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 [2023-01-28 03:46:09,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:09,791 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 15 treesize of output 14 [2023-01-28 03:46:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:09,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:11,119 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_1 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* 4 v_subst_1)))))) (<= c_~N~0 v_subst_1) (< (+ v_subst_1 1) c_~N~0))) (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_2 Int)) (or (< (+ v_subst_2 1) c_~N~0) (<= c_~N~0 v_subst_2) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (< (+ (select .cse2 c_~A~0.offset) (select .cse2 (+ c_~A~0.offset (* 4 v_subst_2)))) (+ (select .cse2 .cse1) c_~counter~0 1))))))) is different from false [2023-01-28 03:46:11,154 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse1 (+ c_~A~0.offset .cse4 4)) (.cse2 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse4)))) (and (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_2 Int)) (or (< (+ v_subst_2 1) c_~N~0) (<= c_~N~0 v_subst_2) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* 4 v_subst_2)))) (+ (select .cse0 .cse1) .cse2 c_~counter~0 1))))) (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_1 Int)) (or (<= c_~N~0 v_subst_1) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (<= (+ (select .cse3 .cse1) .cse2 c_~counter~0) (+ (select .cse3 c_~A~0.offset) (select .cse3 (+ c_~A~0.offset (* 4 v_subst_1)))))) (< (+ v_subst_1 1) c_~N~0)))))) is different from false [2023-01-28 03:46:11,222 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_1 Int)) (or (<= c_~N~0 v_subst_1) (< (+ v_subst_1 1) c_~N~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (<= (+ .cse0 (select .cse1 .cse2) c_~counter~0) (+ (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset (* 4 v_subst_1)))))))) (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_2 Int)) (or (< (+ v_subst_2 1) c_~N~0) (<= c_~N~0 v_subst_2) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (< (+ (select .cse3 c_~A~0.offset) (select .cse3 (+ c_~A~0.offset (* 4 v_subst_2)))) (+ .cse0 (select .cse3 .cse2) c_~counter~0 1))))))) is different from false [2023-01-28 03:46:11,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:11,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 64 [2023-01-28 03:46:11,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:11,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 506 treesize of output 434 [2023-01-28 03:46:11,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:11,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 96 [2023-01-28 03:46:11,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:11,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 47 [2023-01-28 03:46:11,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:11,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 65 [2023-01-28 03:46:11,706 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:46:11,714 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-01-28 03:46:11,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 88 [2023-01-28 03:46:11,721 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 03:46:11,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2023-01-28 03:46:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-01-28 03:46:11,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095195666] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:11,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:11,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-01-28 03:46:11,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010953683] [2023-01-28 03:46:11,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:11,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 03:46:11,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:11,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 03:46:11,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=936, Unknown=3, NotChecked=192, Total=1260 [2023-01-28 03:46:11,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:46:11,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 237 transitions, 3197 flow. Second operand has 36 states, 36 states have (on average 54.55555555555556) internal successors, (1964), 36 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:11,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:11,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:46:11,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:17,735 INFO L130 PetriNetUnfolder]: 1239/2231 cut-off events. [2023-01-28 03:46:17,735 INFO L131 PetriNetUnfolder]: For 30310/30310 co-relation queries the response was YES. [2023-01-28 03:46:17,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13876 conditions, 2231 events. 1239/2231 cut-off events. For 30310/30310 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13059 event pairs, 338 based on Foata normal form. 2/2233 useless extension candidates. Maximal degree in co-relation 13398. Up to 1941 conditions per place. [2023-01-28 03:46:17,747 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 230 selfloop transitions, 112 changer transitions 3/345 dead transitions. [2023-01-28 03:46:17,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 345 transitions, 5143 flow [2023-01-28 03:46:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 03:46:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 03:46:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1609 transitions. [2023-01-28 03:46:17,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2789528432732316 [2023-01-28 03:46:17,756 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1609 transitions. [2023-01-28 03:46:17,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1609 transitions. [2023-01-28 03:46:17,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:17,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1609 transitions. [2023-01-28 03:46:17,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.464285714285715) internal successors, (1609), 28 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:17,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 206.0) internal successors, (5974), 29 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:17,768 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 206.0) internal successors, (5974), 29 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:17,768 INFO L175 Difference]: Start difference. First operand has 231 places, 237 transitions, 3197 flow. Second operand 28 states and 1609 transitions. [2023-01-28 03:46:17,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 345 transitions, 5143 flow [2023-01-28 03:46:17,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 345 transitions, 4545 flow, removed 242 selfloop flow, removed 10 redundant places. [2023-01-28 03:46:17,873 INFO L231 Difference]: Finished difference. Result has 257 places, 299 transitions, 4029 flow [2023-01-28 03:46:17,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4029, PETRI_PLACES=257, PETRI_TRANSITIONS=299} [2023-01-28 03:46:17,873 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2023-01-28 03:46:17,873 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 299 transitions, 4029 flow [2023-01-28 03:46:17,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 54.55555555555556) internal successors, (1964), 36 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:17,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:17,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:17,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 03:46:18,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-01-28 03:46:18,074 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:18,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:18,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1655123187, now seen corresponding path program 29 times [2023-01-28 03:46:18,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:18,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6735665] [2023-01-28 03:46:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:18,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:18,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:18,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6735665] [2023-01-28 03:46:18,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6735665] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:18,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401985644] [2023-01-28 03:46:18,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:46:18,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:18,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:18,661 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:18,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 03:46:18,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 03:46:18,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:18,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 03:46:18,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:46:18,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:19,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:19,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 03:46:19,057 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 03:46:19,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 03:46:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:19,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401985644] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:19,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:19,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 24 [2023-01-28 03:46:19,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217635836] [2023-01-28 03:46:19,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:19,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 03:46:19,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 03:46:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-01-28 03:46:19,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:46:19,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 299 transitions, 4029 flow. Second operand has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:19,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:19,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:46:19,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:19,886 INFO L130 PetriNetUnfolder]: 1287/2319 cut-off events. [2023-01-28 03:46:19,886 INFO L131 PetriNetUnfolder]: For 26591/26591 co-relation queries the response was YES. [2023-01-28 03:46:19,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14804 conditions, 2319 events. 1287/2319 cut-off events. For 26591/26591 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13672 event pairs, 393 based on Foata normal form. 2/2321 useless extension candidates. Maximal degree in co-relation 14494. Up to 2129 conditions per place. [2023-01-28 03:46:19,903 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 285 selfloop transitions, 55 changer transitions 3/343 dead transitions. [2023-01-28 03:46:19,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 343 transitions, 5237 flow [2023-01-28 03:46:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 03:46:19,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 03:46:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 931 transitions. [2023-01-28 03:46:19,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2824635922330097 [2023-01-28 03:46:19,904 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 931 transitions. [2023-01-28 03:46:19,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 931 transitions. [2023-01-28 03:46:19,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:19,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 931 transitions. [2023-01-28 03:46:19,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.1875) internal successors, (931), 16 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:19,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:19,908 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:19,909 INFO L175 Difference]: Start difference. First operand has 257 places, 299 transitions, 4029 flow. Second operand 16 states and 931 transitions. [2023-01-28 03:46:19,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 343 transitions, 5237 flow [2023-01-28 03:46:20,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 343 transitions, 5162 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-01-28 03:46:20,035 INFO L231 Difference]: Finished difference. Result has 268 places, 305 transitions, 4369 flow [2023-01-28 03:46:20,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=3954, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4369, PETRI_PLACES=268, PETRI_TRANSITIONS=305} [2023-01-28 03:46:20,035 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 247 predicate places. [2023-01-28 03:46:20,036 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 305 transitions, 4369 flow [2023-01-28 03:46:20,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:20,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:20,036 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:20,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-01-28 03:46:20,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:20,240 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:20,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1065444320, now seen corresponding path program 30 times [2023-01-28 03:46:20,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:20,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911263026] [2023-01-28 03:46:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:20,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:20,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:20,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911263026] [2023-01-28 03:46:20,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911263026] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:20,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444333663] [2023-01-28 03:46:20,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:46:20,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:20,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:20,320 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:20,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 03:46:20,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 03:46:20,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:20,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 03:46:20,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:20,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:20,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444333663] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:20,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:20,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 03:46:20,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259231077] [2023-01-28 03:46:20,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:20,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 03:46:20,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 03:46:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-01-28 03:46:20,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:46:20,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 305 transitions, 4369 flow. Second operand has 19 states, 19 states have (on average 77.05263157894737) internal successors, (1464), 19 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:20,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:20,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:46:20,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:21,211 INFO L130 PetriNetUnfolder]: 1964/3502 cut-off events. [2023-01-28 03:46:21,212 INFO L131 PetriNetUnfolder]: For 50367/50390 co-relation queries the response was YES. [2023-01-28 03:46:21,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22566 conditions, 3502 events. 1964/3502 cut-off events. For 50367/50390 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22460 event pairs, 910 based on Foata normal form. 159/3646 useless extension candidates. Maximal degree in co-relation 22251. Up to 2048 conditions per place. [2023-01-28 03:46:21,239 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 389 selfloop transitions, 94 changer transitions 0/500 dead transitions. [2023-01-28 03:46:21,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 500 transitions, 7980 flow [2023-01-28 03:46:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 03:46:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 03:46:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 727 transitions. [2023-01-28 03:46:21,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39212513484358147 [2023-01-28 03:46:21,241 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 727 transitions. [2023-01-28 03:46:21,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 727 transitions. [2023-01-28 03:46:21,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:21,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 727 transitions. [2023-01-28 03:46:21,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.77777777777777) internal successors, (727), 9 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:21,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:21,244 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:21,244 INFO L175 Difference]: Start difference. First operand has 268 places, 305 transitions, 4369 flow. Second operand 9 states and 727 transitions. [2023-01-28 03:46:21,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 500 transitions, 7980 flow [2023-01-28 03:46:21,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 500 transitions, 7454 flow, removed 229 selfloop flow, removed 11 redundant places. [2023-01-28 03:46:21,425 INFO L231 Difference]: Finished difference. Result has 267 places, 366 transitions, 5281 flow [2023-01-28 03:46:21,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5281, PETRI_PLACES=267, PETRI_TRANSITIONS=366} [2023-01-28 03:46:21,425 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2023-01-28 03:46:21,425 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 366 transitions, 5281 flow [2023-01-28 03:46:21,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.05263157894737) internal successors, (1464), 19 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:21,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:21,425 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:21,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-01-28 03:46:21,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:21,626 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:21,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:21,626 INFO L85 PathProgramCache]: Analyzing trace with hash -204995997, now seen corresponding path program 31 times [2023-01-28 03:46:21,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:21,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729678796] [2023-01-28 03:46:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:21,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:21,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:21,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729678796] [2023-01-28 03:46:21,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729678796] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:21,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568287873] [2023-01-28 03:46:21,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:46:21,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:21,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:21,696 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:21,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 03:46:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:21,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 03:46:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:21,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:21,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568287873] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:21,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:21,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 03:46:21,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768512714] [2023-01-28 03:46:21,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:21,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 03:46:21,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 03:46:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-01-28 03:46:21,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:46:21,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 366 transitions, 5281 flow. Second operand has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:21,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:21,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:46:21,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:22,490 INFO L130 PetriNetUnfolder]: 1451/2682 cut-off events. [2023-01-28 03:46:22,490 INFO L131 PetriNetUnfolder]: For 34806/34824 co-relation queries the response was YES. [2023-01-28 03:46:22,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17585 conditions, 2682 events. 1451/2682 cut-off events. For 34806/34824 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17010 event pairs, 390 based on Foata normal form. 154/2820 useless extension candidates. Maximal degree in co-relation 17284. Up to 1037 conditions per place. [2023-01-28 03:46:22,512 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 368 selfloop transitions, 55 changer transitions 0/440 dead transitions. [2023-01-28 03:46:22,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 440 transitions, 7045 flow [2023-01-28 03:46:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 03:46:22,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 03:46:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 805 transitions. [2023-01-28 03:46:22,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907766990291262 [2023-01-28 03:46:22,522 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 805 transitions. [2023-01-28 03:46:22,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 805 transitions. [2023-01-28 03:46:22,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:22,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 805 transitions. [2023-01-28 03:46:22,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.5) internal successors, (805), 10 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:22,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:22,527 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:22,527 INFO L175 Difference]: Start difference. First operand has 267 places, 366 transitions, 5281 flow. Second operand 10 states and 805 transitions. [2023-01-28 03:46:22,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 440 transitions, 7045 flow [2023-01-28 03:46:22,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 440 transitions, 6788 flow, removed 125 selfloop flow, removed 4 redundant places. [2023-01-28 03:46:22,696 INFO L231 Difference]: Finished difference. Result has 274 places, 326 transitions, 4627 flow [2023-01-28 03:46:22,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4627, PETRI_PLACES=274, PETRI_TRANSITIONS=326} [2023-01-28 03:46:22,696 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2023-01-28 03:46:22,696 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 326 transitions, 4627 flow [2023-01-28 03:46:22,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:22,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:22,697 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:22,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-01-28 03:46:22,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-28 03:46:22,897 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:22,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:22,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1422006612, now seen corresponding path program 32 times [2023-01-28 03:46:22,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:22,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399637761] [2023-01-28 03:46:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:22,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:46:22,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:22,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399637761] [2023-01-28 03:46:22,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399637761] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:22,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805335023] [2023-01-28 03:46:22,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:46:22,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:22,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:22,980 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:22,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 03:46:23,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:46:23,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:23,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 03:46:23,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:46:23,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:46:23,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805335023] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:23,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:23,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 03:46:23,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757135748] [2023-01-28 03:46:23,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:23,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 03:46:23,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:23,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 03:46:23,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-01-28 03:46:23,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:46:23,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 326 transitions, 4627 flow. Second operand has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:23,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:23,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:46:23,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:23,737 INFO L130 PetriNetUnfolder]: 1170/2263 cut-off events. [2023-01-28 03:46:23,737 INFO L131 PetriNetUnfolder]: For 24607/24618 co-relation queries the response was YES. [2023-01-28 03:46:23,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14586 conditions, 2263 events. 1170/2263 cut-off events. For 24607/24618 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14439 event pairs, 266 based on Foata normal form. 163/2426 useless extension candidates. Maximal degree in co-relation 14260. Up to 835 conditions per place. [2023-01-28 03:46:23,755 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 311 selfloop transitions, 5 changer transitions 113/434 dead transitions. [2023-01-28 03:46:23,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 434 transitions, 6584 flow [2023-01-28 03:46:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 03:46:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 03:46:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 804 transitions. [2023-01-28 03:46:23,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39029126213592236 [2023-01-28 03:46:23,756 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 804 transitions. [2023-01-28 03:46:23,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 804 transitions. [2023-01-28 03:46:23,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:23,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 804 transitions. [2023-01-28 03:46:23,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.4) internal successors, (804), 10 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:23,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:23,758 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:23,758 INFO L175 Difference]: Start difference. First operand has 274 places, 326 transitions, 4627 flow. Second operand 10 states and 804 transitions. [2023-01-28 03:46:23,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 434 transitions, 6584 flow [2023-01-28 03:46:23,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 434 transitions, 6187 flow, removed 43 selfloop flow, removed 8 redundant places. [2023-01-28 03:46:23,874 INFO L231 Difference]: Finished difference. Result has 279 places, 246 transitions, 3205 flow [2023-01-28 03:46:23,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3205, PETRI_PLACES=279, PETRI_TRANSITIONS=246} [2023-01-28 03:46:23,875 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 258 predicate places. [2023-01-28 03:46:23,875 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 246 transitions, 3205 flow [2023-01-28 03:46:23,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:23,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:23,876 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:23,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 03:46:24,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-28 03:46:24,076 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:24,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:24,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1517944512, now seen corresponding path program 33 times [2023-01-28 03:46:24,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:24,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017420613] [2023-01-28 03:46:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:24,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:46:24,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017420613] [2023-01-28 03:46:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017420613] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135852229] [2023-01-28 03:46:24,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:46:24,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:24,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:24,176 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:24,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 03:46:24,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 03:46:24,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:24,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 03:46:24,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:46:24,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:46:24,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135852229] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:24,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:24,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 03:46:24,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876743341] [2023-01-28 03:46:24,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:24,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 03:46:24,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 03:46:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-01-28 03:46:24,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 03:46:24,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 246 transitions, 3205 flow. Second operand has 19 states, 19 states have (on average 76.84210526315789) internal successors, (1460), 19 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:24,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:24,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 03:46:24,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:24,696 INFO L130 PetriNetUnfolder]: 668/1171 cut-off events. [2023-01-28 03:46:24,696 INFO L131 PetriNetUnfolder]: For 15837/15840 co-relation queries the response was YES. [2023-01-28 03:46:24,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8475 conditions, 1171 events. 668/1171 cut-off events. For 15837/15840 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5539 event pairs, 191 based on Foata normal form. 121/1292 useless extension candidates. Maximal degree in co-relation 8353. Up to 780 conditions per place. [2023-01-28 03:46:24,710 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 168 selfloop transitions, 90 changer transitions 0/263 dead transitions. [2023-01-28 03:46:24,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 263 transitions, 4019 flow [2023-01-28 03:46:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 03:46:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 03:46:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2023-01-28 03:46:24,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38457389428263217 [2023-01-28 03:46:24,712 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 713 transitions. [2023-01-28 03:46:24,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 713 transitions. [2023-01-28 03:46:24,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:24,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 713 transitions. [2023-01-28 03:46:24,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.22222222222223) internal successors, (713), 9 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:24,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:24,714 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:24,715 INFO L175 Difference]: Start difference. First operand has 279 places, 246 transitions, 3205 flow. Second operand 9 states and 713 transitions. [2023-01-28 03:46:24,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 263 transitions, 4019 flow [2023-01-28 03:46:24,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 263 transitions, 3373 flow, removed 226 selfloop flow, removed 35 redundant places. [2023-01-28 03:46:24,826 INFO L231 Difference]: Finished difference. Result has 234 places, 248 transitions, 2902 flow [2023-01-28 03:46:24,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2902, PETRI_PLACES=234, PETRI_TRANSITIONS=248} [2023-01-28 03:46:24,827 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2023-01-28 03:46:24,827 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 248 transitions, 2902 flow [2023-01-28 03:46:24,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 76.84210526315789) internal successors, (1460), 19 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:24,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:24,827 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:24,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-28 03:46:25,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 03:46:25,028 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:25,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:25,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1248224389, now seen corresponding path program 34 times [2023-01-28 03:46:25,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:25,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358304319] [2023-01-28 03:46:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:25,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:25,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:25,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358304319] [2023-01-28 03:46:25,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358304319] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:25,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067827790] [2023-01-28 03:46:25,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:46:25,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:25,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:25,825 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:25,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 03:46:25,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:46:25,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:25,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-01-28 03:46:25,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:46:26,211 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 20 treesize of output 20 [2023-01-28 03:46:26,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:46:26,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:26,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-28 03:46:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:26,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:27,016 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_3 Int)) (or (<= c_~N~0 (+ v_subst_3 1)) (< (+ 2 v_subst_3) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0) (let ((.cse2 (* 4 v_subst_3))) (+ (select .cse0 (+ c_~A~0.offset .cse2)) (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset .cse2 4)))))))) (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_4 Int)) (or (<= c_~N~0 (+ v_subst_4 1)) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (< (let ((.cse4 (* 4 v_subst_4))) (+ (select .cse3 (+ c_~A~0.offset .cse4)) (select .cse3 (+ c_~A~0.offset .cse4 4)) (select .cse3 c_~A~0.offset))) (+ (select .cse3 .cse1) c_~counter~0 1))) (< (+ 2 v_subst_4) c_~N~0))))) is different from false [2023-01-28 03:46:27,040 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_3 Int)) (or (<= c_~N~0 (+ v_subst_3 1)) (< (+ 2 v_subst_3) c_~N~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (<= (+ .cse0 c_~counter~0 (select .cse1 .cse2)) (let ((.cse3 (* 4 v_subst_3))) (+ (select .cse1 (+ c_~A~0.offset .cse3)) (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset .cse3 4)))))))) (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_4 Int)) (or (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (< (let ((.cse5 (* 4 v_subst_4))) (+ (select .cse4 (+ c_~A~0.offset .cse5)) (select .cse4 (+ c_~A~0.offset .cse5 4)) (select .cse4 c_~A~0.offset))) (+ .cse0 c_~counter~0 (select .cse4 .cse2) 1))) (<= c_~N~0 (+ v_subst_4 1)) (< (+ 2 v_subst_4) c_~N~0)))))) is different from false [2023-01-28 03:46:27,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:27,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 154 [2023-01-28 03:46:27,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:27,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 63 [2023-01-28 03:46:28,014 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:46:28,077 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-28 03:46:28,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-01-28 03:46:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-01-28 03:46:28,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067827790] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:28,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:28,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 03:46:28,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078316658] [2023-01-28 03:46:28,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:28,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 03:46:28,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:28,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 03:46:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1639, Unknown=2, NotChecked=166, Total=1980 [2023-01-28 03:46:28,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-01-28 03:46:28,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 248 transitions, 2902 flow. Second operand has 45 states, 45 states have (on average 57.355555555555554) internal successors, (2581), 45 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:28,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:28,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-01-28 03:46:28,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:30,757 INFO L130 PetriNetUnfolder]: 924/1680 cut-off events. [2023-01-28 03:46:30,757 INFO L131 PetriNetUnfolder]: For 25949/25949 co-relation queries the response was YES. [2023-01-28 03:46:30,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12552 conditions, 1680 events. 924/1680 cut-off events. For 25949/25949 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9015 event pairs, 36 based on Foata normal form. 2/1682 useless extension candidates. Maximal degree in co-relation 12262. Up to 965 conditions per place. [2023-01-28 03:46:30,769 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 267 selfloop transitions, 197 changer transitions 9/473 dead transitions. [2023-01-28 03:46:30,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 473 transitions, 6648 flow [2023-01-28 03:46:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 03:46:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 03:46:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2669 transitions. [2023-01-28 03:46:30,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2944616063548102 [2023-01-28 03:46:30,772 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2669 transitions. [2023-01-28 03:46:30,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2669 transitions. [2023-01-28 03:46:30,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:30,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2669 transitions. [2023-01-28 03:46:30,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 60.65909090909091) internal successors, (2669), 44 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:30,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:30,782 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:30,782 INFO L175 Difference]: Start difference. First operand has 234 places, 248 transitions, 2902 flow. Second operand 44 states and 2669 transitions. [2023-01-28 03:46:30,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 473 transitions, 6648 flow [2023-01-28 03:46:30,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 473 transitions, 6386 flow, removed 37 selfloop flow, removed 7 redundant places. [2023-01-28 03:46:30,875 INFO L231 Difference]: Finished difference. Result has 278 places, 371 transitions, 5578 flow [2023-01-28 03:46:30,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5578, PETRI_PLACES=278, PETRI_TRANSITIONS=371} [2023-01-28 03:46:30,876 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-01-28 03:46:30,876 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 371 transitions, 5578 flow [2023-01-28 03:46:30,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 57.355555555555554) internal successors, (2581), 45 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:30,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:30,876 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:30,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-28 03:46:31,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 03:46:31,082 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:31,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:31,082 INFO L85 PathProgramCache]: Analyzing trace with hash -564186213, now seen corresponding path program 35 times [2023-01-28 03:46:31,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:31,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392354745] [2023-01-28 03:46:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:31,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:31,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:31,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392354745] [2023-01-28 03:46:31,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392354745] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:31,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578259224] [2023-01-28 03:46:31,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:46:31,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:31,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:31,918 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:31,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-28 03:46:32,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 03:46:32,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:32,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 03:46:32,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:32,283 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:46:32,284 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:46:32,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:32,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2023-01-28 03:46:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:46:32,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:32,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:32,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 03:46:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:46:32,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578259224] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:32,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:32,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 29 [2023-01-28 03:46:32,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812786951] [2023-01-28 03:46:32,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:32,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 03:46:32,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 03:46:32,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2023-01-28 03:46:32,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:46:32,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 371 transitions, 5578 flow. Second operand has 31 states, 31 states have (on average 54.806451612903224) internal successors, (1699), 31 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:32,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:32,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:46:32,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:33,892 INFO L130 PetriNetUnfolder]: 1004/1816 cut-off events. [2023-01-28 03:46:33,892 INFO L131 PetriNetUnfolder]: For 32473/32473 co-relation queries the response was YES. [2023-01-28 03:46:33,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14495 conditions, 1816 events. 1004/1816 cut-off events. For 32473/32473 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9859 event pairs, 168 based on Foata normal form. 1/1817 useless extension candidates. Maximal degree in co-relation 14367. Up to 1500 conditions per place. [2023-01-28 03:46:33,906 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 304 selfloop transitions, 138 changer transitions 1/443 dead transitions. [2023-01-28 03:46:33,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 443 transitions, 7344 flow [2023-01-28 03:46:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 03:46:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 03:46:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1431 transitions. [2023-01-28 03:46:33,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2778640776699029 [2023-01-28 03:46:33,908 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1431 transitions. [2023-01-28 03:46:33,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1431 transitions. [2023-01-28 03:46:33,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:33,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1431 transitions. [2023-01-28 03:46:33,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.24) internal successors, (1431), 25 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:33,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:33,913 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:33,913 INFO L175 Difference]: Start difference. First operand has 278 places, 371 transitions, 5578 flow. Second operand 25 states and 1431 transitions. [2023-01-28 03:46:33,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 443 transitions, 7344 flow [2023-01-28 03:46:34,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 443 transitions, 6309 flow, removed 462 selfloop flow, removed 15 redundant places. [2023-01-28 03:46:34,032 INFO L231 Difference]: Finished difference. Result has 294 places, 406 transitions, 5650 flow [2023-01-28 03:46:34,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5650, PETRI_PLACES=294, PETRI_TRANSITIONS=406} [2023-01-28 03:46:34,033 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2023-01-28 03:46:34,033 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 406 transitions, 5650 flow [2023-01-28 03:46:34,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 54.806451612903224) internal successors, (1699), 31 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:34,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:34,034 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:34,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-01-28 03:46:34,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 03:46:34,234 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:34,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash 966993389, now seen corresponding path program 36 times [2023-01-28 03:46:34,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:34,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579371430] [2023-01-28 03:46:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:34,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:34,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:34,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579371430] [2023-01-28 03:46:34,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579371430] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:34,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398832608] [2023-01-28 03:46:34,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:46:34,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:34,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:34,993 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:34,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-28 03:46:35,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 03:46:35,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:35,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 03:46:35,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:35,338 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:46:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:46:35,339 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:46:35,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:35,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2023-01-28 03:46:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:46:35,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:35,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:35,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 03:46:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:46:35,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398832608] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:35,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:35,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 29 [2023-01-28 03:46:35,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006250662] [2023-01-28 03:46:35,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:35,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 03:46:35,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:35,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 03:46:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2023-01-28 03:46:35,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:46:35,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 406 transitions, 5650 flow. Second operand has 31 states, 31 states have (on average 61.87096774193548) internal successors, (1918), 31 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:35,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:35,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:46:35,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:37,038 INFO L130 PetriNetUnfolder]: 1087/1965 cut-off events. [2023-01-28 03:46:37,039 INFO L131 PetriNetUnfolder]: For 27325/27325 co-relation queries the response was YES. [2023-01-28 03:46:37,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14919 conditions, 1965 events. 1087/1965 cut-off events. For 27325/27325 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10921 event pairs, 168 based on Foata normal form. 2/1967 useless extension candidates. Maximal degree in co-relation 14797. Up to 1595 conditions per place. [2023-01-28 03:46:37,056 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 327 selfloop transitions, 154 changer transitions 2/483 dead transitions. [2023-01-28 03:46:37,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 483 transitions, 7729 flow [2023-01-28 03:46:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 03:46:37,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 03:46:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1936 transitions. [2023-01-28 03:46:37,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3132686084142395 [2023-01-28 03:46:37,058 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1936 transitions. [2023-01-28 03:46:37,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1936 transitions. [2023-01-28 03:46:37,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:37,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1936 transitions. [2023-01-28 03:46:37,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.53333333333333) internal successors, (1936), 30 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:37,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:37,063 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:37,063 INFO L175 Difference]: Start difference. First operand has 294 places, 406 transitions, 5650 flow. Second operand 30 states and 1936 transitions. [2023-01-28 03:46:37,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 483 transitions, 7729 flow [2023-01-28 03:46:37,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 483 transitions, 7275 flow, removed 169 selfloop flow, removed 12 redundant places. [2023-01-28 03:46:37,171 INFO L231 Difference]: Finished difference. Result has 316 places, 431 transitions, 6443 flow [2023-01-28 03:46:37,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6443, PETRI_PLACES=316, PETRI_TRANSITIONS=431} [2023-01-28 03:46:37,172 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 295 predicate places. [2023-01-28 03:46:37,172 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 431 transitions, 6443 flow [2023-01-28 03:46:37,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 61.87096774193548) internal successors, (1918), 31 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:37,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:37,173 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:37,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-01-28 03:46:37,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-01-28 03:46:37,373 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:37,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:37,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1143816677, now seen corresponding path program 37 times [2023-01-28 03:46:37,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:37,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394097679] [2023-01-28 03:46:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:37,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:38,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:38,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394097679] [2023-01-28 03:46:38,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394097679] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:38,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433872414] [2023-01-28 03:46:38,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:46:38,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:38,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:38,069 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:38,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-28 03:46:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:38,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 03:46:38,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:46:38,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:38,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:38,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 03:46:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:46:38,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433872414] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:38,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:38,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-01-28 03:46:38,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560647225] [2023-01-28 03:46:38,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:38,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 03:46:38,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 03:46:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-01-28 03:46:38,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:46:38,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 431 transitions, 6443 flow. Second operand has 32 states, 32 states have (on average 61.84375) internal successors, (1979), 32 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:38,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:38,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:46:38,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:40,144 INFO L130 PetriNetUnfolder]: 1211/2202 cut-off events. [2023-01-28 03:46:40,145 INFO L131 PetriNetUnfolder]: For 40025/40025 co-relation queries the response was YES. [2023-01-28 03:46:40,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17834 conditions, 2202 events. 1211/2202 cut-off events. For 40025/40025 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12532 event pairs, 197 based on Foata normal form. 3/2205 useless extension candidates. Maximal degree in co-relation 17707. Up to 1636 conditions per place. [2023-01-28 03:46:40,164 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 335 selfloop transitions, 192 changer transitions 4/531 dead transitions. [2023-01-28 03:46:40,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 531 transitions, 9164 flow [2023-01-28 03:46:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 03:46:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 03:46:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1894 transitions. [2023-01-28 03:46:40,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170405088717777 [2023-01-28 03:46:40,166 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1894 transitions. [2023-01-28 03:46:40,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1894 transitions. [2023-01-28 03:46:40,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:40,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1894 transitions. [2023-01-28 03:46:40,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.3103448275862) internal successors, (1894), 29 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:40,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:40,171 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:40,171 INFO L175 Difference]: Start difference. First operand has 316 places, 431 transitions, 6443 flow. Second operand 29 states and 1894 transitions. [2023-01-28 03:46:40,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 531 transitions, 9164 flow [2023-01-28 03:46:40,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 531 transitions, 8352 flow, removed 321 selfloop flow, removed 17 redundant places. [2023-01-28 03:46:40,292 INFO L231 Difference]: Finished difference. Result has 333 places, 462 transitions, 7408 flow [2023-01-28 03:46:40,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7408, PETRI_PLACES=333, PETRI_TRANSITIONS=462} [2023-01-28 03:46:40,292 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 312 predicate places. [2023-01-28 03:46:40,292 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 462 transitions, 7408 flow [2023-01-28 03:46:40,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 61.84375) internal successors, (1979), 32 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:40,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:40,293 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:40,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-28 03:46:40,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-01-28 03:46:40,493 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:40,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash 289376107, now seen corresponding path program 38 times [2023-01-28 03:46:40,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:40,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226092129] [2023-01-28 03:46:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:41,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:41,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226092129] [2023-01-28 03:46:41,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226092129] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:41,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999696821] [2023-01-28 03:46:41,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:46:41,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:41,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:41,260 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:41,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-28 03:46:41,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:46:41,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:41,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-01-28 03:46:41,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:41,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:41,673 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 31 treesize of output 19 [2023-01-28 03:46:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:41,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:42,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:42,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 104 [2023-01-28 03:46:42,550 INFO L321 Elim1Store]: treesize reduction 80, result has 14.0 percent of original size [2023-01-28 03:46:42,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 23 [2023-01-28 03:46:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:42,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999696821] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:42,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:42,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2023-01-28 03:46:42,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275531017] [2023-01-28 03:46:42,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:42,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 03:46:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:42,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 03:46:42,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 03:46:42,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:46:42,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 462 transitions, 7408 flow. Second operand has 34 states, 34 states have (on average 61.411764705882355) internal successors, (2088), 34 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:42,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:42,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:46:42,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:44,010 INFO L130 PetriNetUnfolder]: 1253/2280 cut-off events. [2023-01-28 03:46:44,010 INFO L131 PetriNetUnfolder]: For 41516/41516 co-relation queries the response was YES. [2023-01-28 03:46:44,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18203 conditions, 2280 events. 1253/2280 cut-off events. For 41516/41516 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13073 event pairs, 231 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 18070. Up to 1846 conditions per place. [2023-01-28 03:46:44,031 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 315 selfloop transitions, 193 changer transitions 2/510 dead transitions. [2023-01-28 03:46:44,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 510 transitions, 9143 flow [2023-01-28 03:46:44,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 03:46:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 03:46:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1604 transitions. [2023-01-28 03:46:44,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31145631067961166 [2023-01-28 03:46:44,033 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1604 transitions. [2023-01-28 03:46:44,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1604 transitions. [2023-01-28 03:46:44,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:44,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1604 transitions. [2023-01-28 03:46:44,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.16) internal successors, (1604), 25 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:44,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:44,037 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:44,037 INFO L175 Difference]: Start difference. First operand has 333 places, 462 transitions, 7408 flow. Second operand 25 states and 1604 transitions. [2023-01-28 03:46:44,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 510 transitions, 9143 flow [2023-01-28 03:46:44,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 510 transitions, 8167 flow, removed 400 selfloop flow, removed 20 redundant places. [2023-01-28 03:46:44,233 INFO L231 Difference]: Finished difference. Result has 339 places, 478 transitions, 7393 flow [2023-01-28 03:46:44,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=6474, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7393, PETRI_PLACES=339, PETRI_TRANSITIONS=478} [2023-01-28 03:46:44,233 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 318 predicate places. [2023-01-28 03:46:44,233 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 478 transitions, 7393 flow [2023-01-28 03:46:44,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.411764705882355) internal successors, (2088), 34 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:44,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:44,234 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:44,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-28 03:46:44,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-01-28 03:46:44,435 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:44,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1083728057, now seen corresponding path program 39 times [2023-01-28 03:46:44,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:44,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862440560] [2023-01-28 03:46:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:44,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:45,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:45,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862440560] [2023-01-28 03:46:45,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862440560] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:45,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726648929] [2023-01-28 03:46:45,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:46:45,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:45,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:45,431 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:45,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-28 03:46:45,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 03:46:45,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:45,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 106 conjunts are in the unsatisfiable core [2023-01-28 03:46:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:46,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:46,000 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 14 [2023-01-28 03:46:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:46,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:46,927 INFO L321 Elim1Store]: treesize reduction 38, result has 65.8 percent of original size [2023-01-28 03:46:46,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 83 [2023-01-28 03:46:47,009 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 03:46:47,009 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 22 treesize of output 11 [2023-01-28 03:46:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:46:47,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726648929] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:47,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:47,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-01-28 03:46:47,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341029471] [2023-01-28 03:46:47,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:47,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 03:46:47,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:47,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 03:46:47,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2023-01-28 03:46:47,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:46:47,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 478 transitions, 7393 flow. Second operand has 39 states, 39 states have (on average 54.61538461538461) internal successors, (2130), 39 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:47,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:47,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:46:47,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:50,354 INFO L130 PetriNetUnfolder]: 1328/2430 cut-off events. [2023-01-28 03:46:50,354 INFO L131 PetriNetUnfolder]: For 43014/43014 co-relation queries the response was YES. [2023-01-28 03:46:50,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19039 conditions, 2430 events. 1328/2430 cut-off events. For 43014/43014 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14268 event pairs, 216 based on Foata normal form. 2/2432 useless extension candidates. Maximal degree in co-relation 18904. Up to 1958 conditions per place. [2023-01-28 03:46:50,375 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 366 selfloop transitions, 184 changer transitions 6/556 dead transitions. [2023-01-28 03:46:50,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 556 transitions, 9584 flow [2023-01-28 03:46:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 03:46:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 03:46:50,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1996 transitions. [2023-01-28 03:46:50,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2768377253814147 [2023-01-28 03:46:50,378 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1996 transitions. [2023-01-28 03:46:50,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1996 transitions. [2023-01-28 03:46:50,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:50,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1996 transitions. [2023-01-28 03:46:50,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.02857142857143) internal successors, (1996), 35 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:50,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:50,383 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:50,383 INFO L175 Difference]: Start difference. First operand has 339 places, 478 transitions, 7393 flow. Second operand 35 states and 1996 transitions. [2023-01-28 03:46:50,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 556 transitions, 9584 flow [2023-01-28 03:46:50,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 556 transitions, 8982 flow, removed 190 selfloop flow, removed 19 redundant places. [2023-01-28 03:46:50,530 INFO L231 Difference]: Finished difference. Result has 360 places, 501 transitions, 8067 flow [2023-01-28 03:46:50,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8067, PETRI_PLACES=360, PETRI_TRANSITIONS=501} [2023-01-28 03:46:50,530 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 339 predicate places. [2023-01-28 03:46:50,530 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 501 transitions, 8067 flow [2023-01-28 03:46:50,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.61538461538461) internal successors, (2130), 39 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:50,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:50,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:50,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-01-28 03:46:50,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:50,731 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:50,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:50,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1010617733, now seen corresponding path program 40 times [2023-01-28 03:46:50,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:50,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457044414] [2023-01-28 03:46:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:50,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:51,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:51,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457044414] [2023-01-28 03:46:51,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457044414] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:51,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085718974] [2023-01-28 03:46:51,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:46:51,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:51,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:51,494 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:51,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-28 03:46:51,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:46:51,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:51,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 03:46:51,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:52,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:52,013 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 15 treesize of output 14 [2023-01-28 03:46:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:52,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:52,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:52,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 104 [2023-01-28 03:46:52,886 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-01-28 03:46:52,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-01-28 03:46:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:53,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085718974] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:53,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:53,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-01-28 03:46:53,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458943874] [2023-01-28 03:46:53,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:53,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 03:46:53,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:53,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 03:46:53,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 03:46:53,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:46:53,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 501 transitions, 8067 flow. Second operand has 41 states, 41 states have (on average 61.41463414634146) internal successors, (2518), 41 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:53,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:53,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:46:53,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:54,740 INFO L130 PetriNetUnfolder]: 1481/2703 cut-off events. [2023-01-28 03:46:54,740 INFO L131 PetriNetUnfolder]: For 52388/52388 co-relation queries the response was YES. [2023-01-28 03:46:54,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22669 conditions, 2703 events. 1481/2703 cut-off events. For 52388/52388 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16375 event pairs, 254 based on Foata normal form. 4/2707 useless extension candidates. Maximal degree in co-relation 22528. Up to 2220 conditions per place. [2023-01-28 03:46:54,767 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 402 selfloop transitions, 223 changer transitions 4/629 dead transitions. [2023-01-28 03:46:54,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 629 transitions, 11551 flow [2023-01-28 03:46:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 03:46:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 03:46:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2063 transitions. [2023-01-28 03:46:54,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3129550970873786 [2023-01-28 03:46:54,769 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2063 transitions. [2023-01-28 03:46:54,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2063 transitions. [2023-01-28 03:46:54,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:54,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2063 transitions. [2023-01-28 03:46:54,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 64.46875) internal successors, (2063), 32 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:54,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:54,774 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:54,774 INFO L175 Difference]: Start difference. First operand has 360 places, 501 transitions, 8067 flow. Second operand 32 states and 2063 transitions. [2023-01-28 03:46:54,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 629 transitions, 11551 flow [2023-01-28 03:46:54,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 629 transitions, 10632 flow, removed 323 selfloop flow, removed 27 redundant places. [2023-01-28 03:46:54,973 INFO L231 Difference]: Finished difference. Result has 365 places, 574 transitions, 9506 flow [2023-01-28 03:46:54,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=7182, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9506, PETRI_PLACES=365, PETRI_TRANSITIONS=574} [2023-01-28 03:46:54,973 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 344 predicate places. [2023-01-28 03:46:54,974 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 574 transitions, 9506 flow [2023-01-28 03:46:54,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 61.41463414634146) internal successors, (2518), 41 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:54,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:54,974 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:54,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-28 03:46:55,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:55,180 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:55,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1638284751, now seen corresponding path program 41 times [2023-01-28 03:46:55,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:55,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692981677] [2023-01-28 03:46:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:55,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:46:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:46:56,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:46:56,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692981677] [2023-01-28 03:46:56,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692981677] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:46:56,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749734636] [2023-01-28 03:46:56,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:46:56,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:46:56,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:46:56,149 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:46:56,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-28 03:46:56,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 03:46:56,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:46:56,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 03:46:56,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:46:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:46:56,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:46:56,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:46:56,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 03:46:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:46:56,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749734636] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:46:56,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:46:56,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-28 03:46:56,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506366504] [2023-01-28 03:46:56,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:46:56,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 03:46:56,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:46:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 03:46:56,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 03:46:56,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:46:56,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 574 transitions, 9506 flow. Second operand has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:56,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:46:56,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:46:56,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:46:58,834 INFO L130 PetriNetUnfolder]: 1579/2895 cut-off events. [2023-01-28 03:46:58,834 INFO L131 PetriNetUnfolder]: For 64997/64997 co-relation queries the response was YES. [2023-01-28 03:46:58,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25125 conditions, 2895 events. 1579/2895 cut-off events. For 64997/64997 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17933 event pairs, 289 based on Foata normal form. 2/2897 useless extension candidates. Maximal degree in co-relation 24985. Up to 2350 conditions per place. [2023-01-28 03:46:58,861 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 442 selfloop transitions, 212 changer transitions 2/656 dead transitions. [2023-01-28 03:46:58,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 656 transitions, 12492 flow [2023-01-28 03:46:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 03:46:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 03:46:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1843 transitions. [2023-01-28 03:46:58,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27958131067961167 [2023-01-28 03:46:58,863 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1843 transitions. [2023-01-28 03:46:58,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1843 transitions. [2023-01-28 03:46:58,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:46:58,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1843 transitions. [2023-01-28 03:46:58,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.59375) internal successors, (1843), 32 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:58,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:58,870 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:58,870 INFO L175 Difference]: Start difference. First operand has 365 places, 574 transitions, 9506 flow. Second operand 32 states and 1843 transitions. [2023-01-28 03:46:58,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 656 transitions, 12492 flow [2023-01-28 03:46:59,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 656 transitions, 12013 flow, removed 204 selfloop flow, removed 14 redundant places. [2023-01-28 03:46:59,178 INFO L231 Difference]: Finished difference. Result has 386 places, 594 transitions, 10656 flow [2023-01-28 03:46:59,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=9027, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10656, PETRI_PLACES=386, PETRI_TRANSITIONS=594} [2023-01-28 03:46:59,179 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 365 predicate places. [2023-01-28 03:46:59,180 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 594 transitions, 10656 flow [2023-01-28 03:46:59,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:46:59,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:46:59,180 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:46:59,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-01-28 03:46:59,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-01-28 03:46:59,386 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:46:59,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:46:59,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1223489761, now seen corresponding path program 42 times [2023-01-28 03:46:59,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:46:59,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248894239] [2023-01-28 03:46:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:46:59,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:46:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:47:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:00,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:47:00,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248894239] [2023-01-28 03:47:00,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248894239] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:47:00,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274513319] [2023-01-28 03:47:00,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:47:00,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:47:00,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:47:00,294 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:47:00,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-28 03:47:00,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 03:47:00,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:47:00,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 03:47:00,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:47:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:47:00,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:47:00,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-28 03:47:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:00,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:47:01,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:47:01,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 103 [2023-01-28 03:47:01,789 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-01-28 03:47:01,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 60 [2023-01-28 03:47:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:02,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274513319] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:47:02,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:47:02,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-01-28 03:47:02,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175881230] [2023-01-28 03:47:02,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:47:02,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 03:47:02,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:47:02,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 03:47:02,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 03:47:02,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:47:02,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 594 transitions, 10656 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:02,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:47:02,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:47:02,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:47:04,517 INFO L130 PetriNetUnfolder]: 1879/3601 cut-off events. [2023-01-28 03:47:04,517 INFO L131 PetriNetUnfolder]: For 83662/83662 co-relation queries the response was YES. [2023-01-28 03:47:04,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30501 conditions, 3601 events. 1879/3601 cut-off events. For 83662/83662 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24637 event pairs, 15 based on Foata normal form. 4/3605 useless extension candidates. Maximal degree in co-relation 30356. Up to 1671 conditions per place. [2023-01-28 03:47:04,550 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 421 selfloop transitions, 365 changer transitions 6/792 dead transitions. [2023-01-28 03:47:04,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 792 transitions, 15469 flow [2023-01-28 03:47:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 03:47:04,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 03:47:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1963 transitions. [2023-01-28 03:47:04,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2802684180468304 [2023-01-28 03:47:04,553 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1963 transitions. [2023-01-28 03:47:04,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1963 transitions. [2023-01-28 03:47:04,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:47:04,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1963 transitions. [2023-01-28 03:47:04,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.73529411764706) internal successors, (1963), 34 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:04,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:04,560 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:04,560 INFO L175 Difference]: Start difference. First operand has 386 places, 594 transitions, 10656 flow. Second operand 34 states and 1963 transitions. [2023-01-28 03:47:04,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 792 transitions, 15469 flow [2023-01-28 03:47:04,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 792 transitions, 13410 flow, removed 940 selfloop flow, removed 21 redundant places. [2023-01-28 03:47:04,915 INFO L231 Difference]: Finished difference. Result has 401 places, 722 transitions, 12249 flow [2023-01-28 03:47:04,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=9534, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12249, PETRI_PLACES=401, PETRI_TRANSITIONS=722} [2023-01-28 03:47:04,916 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 380 predicate places. [2023-01-28 03:47:04,916 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 722 transitions, 12249 flow [2023-01-28 03:47:04,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:04,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:47:04,917 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:47:04,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-01-28 03:47:05,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-01-28 03:47:05,117 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:47:05,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:47:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1882185715, now seen corresponding path program 43 times [2023-01-28 03:47:05,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:47:05,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778704731] [2023-01-28 03:47:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:47:05,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:47:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:47:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:05,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:47:05,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778704731] [2023-01-28 03:47:05,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778704731] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:47:05,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261037075] [2023-01-28 03:47:05,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:47:05,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:47:05,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:47:05,829 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:47:05,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-28 03:47:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:47:05,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 03:47:05,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:47:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:47:06,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:47:06,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:47:06,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 03:47:06,571 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 03:47:06,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 03:47:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:47:06,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261037075] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:47:06,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:47:06,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-01-28 03:47:06,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379280359] [2023-01-28 03:47:06,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:47:06,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 03:47:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:47:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 03:47:06,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 03:47:06,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:47:06,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 722 transitions, 12249 flow. Second operand has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:06,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:47:06,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:47:06,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:47:09,177 INFO L130 PetriNetUnfolder]: 2233/4306 cut-off events. [2023-01-28 03:47:09,177 INFO L131 PetriNetUnfolder]: For 127505/127505 co-relation queries the response was YES. [2023-01-28 03:47:09,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39066 conditions, 4306 events. 2233/4306 cut-off events. For 127505/127505 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30575 event pairs, 383 based on Foata normal form. 7/4313 useless extension candidates. Maximal degree in co-relation 38917. Up to 3482 conditions per place. [2023-01-28 03:47:09,213 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 700 selfloop transitions, 217 changer transitions 11/928 dead transitions. [2023-01-28 03:47:09,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 928 transitions, 19470 flow [2023-01-28 03:47:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 03:47:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 03:47:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2291 transitions. [2023-01-28 03:47:09,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.317753120665742 [2023-01-28 03:47:09,216 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2291 transitions. [2023-01-28 03:47:09,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2291 transitions. [2023-01-28 03:47:09,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:47:09,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2291 transitions. [2023-01-28 03:47:09,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 65.45714285714286) internal successors, (2291), 35 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:09,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:09,228 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:09,228 INFO L175 Difference]: Start difference. First operand has 401 places, 722 transitions, 12249 flow. Second operand 35 states and 2291 transitions. [2023-01-28 03:47:09,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 928 transitions, 19470 flow [2023-01-28 03:47:09,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 928 transitions, 18660 flow, removed 368 selfloop flow, removed 17 redundant places. [2023-01-28 03:47:09,754 INFO L231 Difference]: Finished difference. Result has 427 places, 817 transitions, 16330 flow [2023-01-28 03:47:09,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=11881, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16330, PETRI_PLACES=427, PETRI_TRANSITIONS=817} [2023-01-28 03:47:09,755 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 406 predicate places. [2023-01-28 03:47:09,755 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 817 transitions, 16330 flow [2023-01-28 03:47:09,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:09,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:47:09,756 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:47:09,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-28 03:47:09,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-28 03:47:09,961 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:47:09,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:47:09,962 INFO L85 PathProgramCache]: Analyzing trace with hash 379627409, now seen corresponding path program 44 times [2023-01-28 03:47:09,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:47:09,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052710876] [2023-01-28 03:47:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:47:09,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:47:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:47:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:10,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:47:10,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052710876] [2023-01-28 03:47:10,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052710876] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:47:10,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471631676] [2023-01-28 03:47:10,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:47:10,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:47:10,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:47:10,819 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:47:10,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-28 03:47:10,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:47:10,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:47:10,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-01-28 03:47:10,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:47:11,261 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:47:11,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:47:11,262 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 15 treesize of output 9 [2023-01-28 03:47:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:11,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:47:11,630 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-01-28 03:47:11,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 95 [2023-01-28 03:47:11,843 INFO L321 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-01-28 03:47:11,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 24 [2023-01-28 03:47:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:12,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471631676] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:47:12,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:47:12,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2023-01-28 03:47:12,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241688878] [2023-01-28 03:47:12,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:47:12,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 03:47:12,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:47:12,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 03:47:12,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 03:47:12,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:47:12,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 817 transitions, 16330 flow. Second operand has 41 states, 41 states have (on average 54.41463414634146) internal successors, (2231), 41 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:12,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:47:12,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:47:12,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:47:22,552 WARN L222 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 56 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 03:47:35,364 INFO L130 PetriNetUnfolder]: 3219/5857 cut-off events. [2023-01-28 03:47:35,364 INFO L131 PetriNetUnfolder]: For 251151/251151 co-relation queries the response was YES. [2023-01-28 03:47:35,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64250 conditions, 5857 events. 3219/5857 cut-off events. For 251151/251151 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41789 event pairs, 20 based on Foata normal form. 6/5863 useless extension candidates. Maximal degree in co-relation 64091. Up to 1805 conditions per place. [2023-01-28 03:47:35,431 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 597 selfloop transitions, 666 changer transitions 19/1282 dead transitions. [2023-01-28 03:47:35,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1282 transitions, 32630 flow [2023-01-28 03:47:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-28 03:47:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-28 03:47:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3467 transitions. [2023-01-28 03:47:35,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28050161812297736 [2023-01-28 03:47:35,434 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3467 transitions. [2023-01-28 03:47:35,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3467 transitions. [2023-01-28 03:47:35,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:47:35,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3467 transitions. [2023-01-28 03:47:35,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.78333333333333) internal successors, (3467), 60 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:35,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:35,444 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:35,445 INFO L175 Difference]: Start difference. First operand has 427 places, 817 transitions, 16330 flow. Second operand 60 states and 3467 transitions. [2023-01-28 03:47:35,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1282 transitions, 32630 flow [2023-01-28 03:47:36,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1282 transitions, 28404 flow, removed 2055 selfloop flow, removed 19 redundant places. [2023-01-28 03:47:36,499 INFO L231 Difference]: Finished difference. Result has 487 places, 1147 transitions, 27152 flow [2023-01-28 03:47:36,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=14088, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=27152, PETRI_PLACES=487, PETRI_TRANSITIONS=1147} [2023-01-28 03:47:36,500 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 466 predicate places. [2023-01-28 03:47:36,500 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1147 transitions, 27152 flow [2023-01-28 03:47:36,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 54.41463414634146) internal successors, (2231), 41 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:36,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:47:36,500 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:47:36,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-28 03:47:36,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:47:36,701 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:47:36,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:47:36,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1007294427, now seen corresponding path program 45 times [2023-01-28 03:47:36,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:47:36,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58359621] [2023-01-28 03:47:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:47:36,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:47:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:47:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:37,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:47:37,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58359621] [2023-01-28 03:47:37,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58359621] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:47:37,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376410336] [2023-01-28 03:47:37,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:47:37,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:47:37,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:47:37,707 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:47:37,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-28 03:47:37,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 03:47:37,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:47:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 112 conjunts are in the unsatisfiable core [2023-01-28 03:47:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:47:38,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:47:38,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:47:38,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:47:38,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 33 [2023-01-28 03:47:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:38,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:47:39,203 INFO L321 Elim1Store]: treesize reduction 42, result has 64.1 percent of original size [2023-01-28 03:47:39,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 86 [2023-01-28 03:47:39,353 INFO L321 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2023-01-28 03:47:39,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 59 [2023-01-28 03:47:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:39,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376410336] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:47:39,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:47:39,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 03:47:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048829868] [2023-01-28 03:47:39,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:47:39,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 03:47:39,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:47:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 03:47:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1741, Unknown=0, NotChecked=0, Total=1980 [2023-01-28 03:47:39,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:47:39,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1147 transitions, 27152 flow. Second operand has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:39,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:47:39,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:47:39,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:47:48,220 INFO L130 PetriNetUnfolder]: 3338/6153 cut-off events. [2023-01-28 03:47:48,221 INFO L131 PetriNetUnfolder]: For 246599/246599 co-relation queries the response was YES. [2023-01-28 03:47:48,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67061 conditions, 6153 events. 3338/6153 cut-off events. For 246599/246599 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 45167 event pairs, 154 based on Foata normal form. 3/6156 useless extension candidates. Maximal degree in co-relation 66881. Up to 3429 conditions per place. [2023-01-28 03:47:48,296 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 850 selfloop transitions, 532 changer transitions 42/1424 dead transitions. [2023-01-28 03:47:48,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1424 transitions, 36072 flow [2023-01-28 03:47:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-01-28 03:47:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-01-28 03:47:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3808 transitions. [2023-01-28 03:47:48,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2759020431821475 [2023-01-28 03:47:48,300 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3808 transitions. [2023-01-28 03:47:48,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3808 transitions. [2023-01-28 03:47:48,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:47:48,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3808 transitions. [2023-01-28 03:47:48,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 56.83582089552239) internal successors, (3808), 67 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:48,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 206.0) internal successors, (14008), 68 states have internal predecessors, (14008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:48,312 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 206.0) internal successors, (14008), 68 states have internal predecessors, (14008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:48,312 INFO L175 Difference]: Start difference. First operand has 487 places, 1147 transitions, 27152 flow. Second operand 67 states and 3808 transitions. [2023-01-28 03:47:48,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1424 transitions, 36072 flow [2023-01-28 03:47:50,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1424 transitions, 28740 flow, removed 3601 selfloop flow, removed 18 redundant places. [2023-01-28 03:47:50,380 INFO L231 Difference]: Finished difference. Result has 547 places, 1269 transitions, 26162 flow [2023-01-28 03:47:50,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=21300, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=26162, PETRI_PLACES=547, PETRI_TRANSITIONS=1269} [2023-01-28 03:47:50,381 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 526 predicate places. [2023-01-28 03:47:50,381 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1269 transitions, 26162 flow [2023-01-28 03:47:50,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:50,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:47:50,382 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:47:50,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-01-28 03:47:50,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-28 03:47:50,583 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:47:50,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:47:50,583 INFO L85 PathProgramCache]: Analyzing trace with hash -186725331, now seen corresponding path program 46 times [2023-01-28 03:47:50,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:47:50,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454969972] [2023-01-28 03:47:50,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:47:50,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:47:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:47:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:51,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:47:51,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454969972] [2023-01-28 03:47:51,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454969972] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:47:51,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742205437] [2023-01-28 03:47:51,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:47:51,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:47:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:47:51,317 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:47:51,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-28 03:47:51,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:47:51,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:47:51,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 03:47:51,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:47:51,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:47:51,766 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 15 treesize of output 14 [2023-01-28 03:47:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:51,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:47:52,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:47:52,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-01-28 03:47:52,899 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-28 03:47:52,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-01-28 03:47:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:47:53,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742205437] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:47:53,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:47:53,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-01-28 03:47:53,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011315470] [2023-01-28 03:47:53,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:47:53,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 03:47:53,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:47:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 03:47:53,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1570, Unknown=0, NotChecked=0, Total=1806 [2023-01-28 03:47:53,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:47:53,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1269 transitions, 26162 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:53,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:47:53,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:47:53,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:47:57,236 INFO L130 PetriNetUnfolder]: 3339/6135 cut-off events. [2023-01-28 03:47:57,237 INFO L131 PetriNetUnfolder]: For 179133/179133 co-relation queries the response was YES. [2023-01-28 03:47:57,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59792 conditions, 6135 events. 3339/6135 cut-off events. For 179133/179133 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 44792 event pairs, 449 based on Foata normal form. 2/6137 useless extension candidates. Maximal degree in co-relation 59602. Up to 5541 conditions per place. [2023-01-28 03:47:57,313 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 1060 selfloop transitions, 274 changer transitions 6/1340 dead transitions. [2023-01-28 03:47:57,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1340 transitions, 29792 flow [2023-01-28 03:47:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 03:47:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 03:47:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1950 transitions. [2023-01-28 03:47:57,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27841233580810965 [2023-01-28 03:47:57,316 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1950 transitions. [2023-01-28 03:47:57,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1950 transitions. [2023-01-28 03:47:57,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:47:57,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1950 transitions. [2023-01-28 03:47:57,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.35294117647059) internal successors, (1950), 34 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:57,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:57,321 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:57,321 INFO L175 Difference]: Start difference. First operand has 547 places, 1269 transitions, 26162 flow. Second operand 34 states and 1950 transitions. [2023-01-28 03:47:57,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1340 transitions, 29792 flow [2023-01-28 03:47:59,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1340 transitions, 28029 flow, removed 727 selfloop flow, removed 45 redundant places. [2023-01-28 03:47:59,216 INFO L231 Difference]: Finished difference. Result has 538 places, 1285 transitions, 25673 flow [2023-01-28 03:47:59,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=24465, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=25673, PETRI_PLACES=538, PETRI_TRANSITIONS=1285} [2023-01-28 03:47:59,217 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 517 predicate places. [2023-01-28 03:47:59,217 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 1285 transitions, 25673 flow [2023-01-28 03:47:59,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:47:59,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:47:59,218 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:47:59,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-01-28 03:47:59,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:47:59,418 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:47:59,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:47:59,419 INFO L85 PathProgramCache]: Analyzing trace with hash -399050777, now seen corresponding path program 47 times [2023-01-28 03:47:59,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:47:59,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930511979] [2023-01-28 03:47:59,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:47:59,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:47:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:48:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:48:00,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930511979] [2023-01-28 03:48:00,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930511979] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:48:00,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299117777] [2023-01-28 03:48:00,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:48:00,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:48:00,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:48:00,063 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:48:00,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-28 03:48:00,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 03:48:00,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:48:00,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 03:48:00,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:48:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:48:00,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:48:00,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:00,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 03:48:00,785 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 03:48:00,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 03:48:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:48:00,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299117777] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:48:00,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:48:00,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-01-28 03:48:00,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735458131] [2023-01-28 03:48:00,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:48:00,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 03:48:00,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:48:00,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 03:48:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 03:48:00,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:48:00,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1285 transitions, 25673 flow. Second operand has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:00,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:48:00,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:48:00,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:48:04,513 INFO L130 PetriNetUnfolder]: 3478/6414 cut-off events. [2023-01-28 03:48:04,514 INFO L131 PetriNetUnfolder]: For 207016/207016 co-relation queries the response was YES. [2023-01-28 03:48:04,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63777 conditions, 6414 events. 3478/6414 cut-off events. For 207016/207016 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 47246 event pairs, 492 based on Foata normal form. 6/6420 useless extension candidates. Maximal degree in co-relation 63586. Up to 5814 conditions per place. [2023-01-28 03:48:04,580 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1209 selfloop transitions, 190 changer transitions 3/1402 dead transitions. [2023-01-28 03:48:04,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1402 transitions, 31904 flow [2023-01-28 03:48:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 03:48:04,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 03:48:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1561 transitions. [2023-01-28 03:48:04,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3157362459546926 [2023-01-28 03:48:04,582 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1561 transitions. [2023-01-28 03:48:04,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1561 transitions. [2023-01-28 03:48:04,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:48:04,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1561 transitions. [2023-01-28 03:48:04,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.04166666666667) internal successors, (1561), 24 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:04,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 206.0) internal successors, (5150), 25 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:04,587 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 206.0) internal successors, (5150), 25 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:04,587 INFO L175 Difference]: Start difference. First operand has 538 places, 1285 transitions, 25673 flow. Second operand 24 states and 1561 transitions. [2023-01-28 03:48:04,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1402 transitions, 31904 flow [2023-01-28 03:48:06,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1402 transitions, 31461 flow, removed 71 selfloop flow, removed 26 redundant places. [2023-01-28 03:48:06,377 INFO L231 Difference]: Finished difference. Result has 542 places, 1327 transitions, 28186 flow [2023-01-28 03:48:06,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=25230, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=28186, PETRI_PLACES=542, PETRI_TRANSITIONS=1327} [2023-01-28 03:48:06,378 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 521 predicate places. [2023-01-28 03:48:06,378 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 1327 transitions, 28186 flow [2023-01-28 03:48:06,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:06,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:48:06,379 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:48:06,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-28 03:48:06,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-01-28 03:48:06,580 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:48:06,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:48:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1441966515, now seen corresponding path program 48 times [2023-01-28 03:48:06,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:48:06,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799487447] [2023-01-28 03:48:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:48:06,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:48:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:48:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:07,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:48:07,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799487447] [2023-01-28 03:48:07,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799487447] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:48:07,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610771176] [2023-01-28 03:48:07,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:48:07,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:48:07,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:48:07,628 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:48:07,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-28 03:48:07,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 03:48:07,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:48:07,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-01-28 03:48:07,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:48:07,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 03:48:07,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:48:07,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:48:08,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:48:08,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:08,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-28 03:48:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:08,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:48:09,128 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse3 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_1782 (Array Int Int)) (v_subst_20 Int)) (or (< (+ 2 v_subst_20) c_~N~0) (<= c_~N~0 (+ v_subst_20 1)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1782) c_~A~0.base))) (< (let ((.cse1 (* v_subst_20 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 4)) (select .cse0 (+ c_~A~0.offset .cse1)))) (+ c_~counter~0 (select .cse0 .cse2) (select .cse0 .cse3) 1))))) (forall ((v_subst_19 Int) (v_ArrVal_1782 (Array Int Int))) (or (< (+ 2 v_subst_19) c_~N~0) (<= c_~N~0 (+ v_subst_19 1)) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1782) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse4 .cse2) (select .cse4 .cse3)) (let ((.cse5 (* v_subst_19 4))) (+ (select .cse4 (+ c_~A~0.offset 4 .cse5)) (select .cse4 (+ c_~A~0.offset .cse5)))))))))) is different from false [2023-01-28 03:48:09,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:09,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 74 [2023-01-28 03:48:09,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:09,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 318 treesize of output 292 [2023-01-28 03:48:09,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:09,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 64 [2023-01-28 03:48:09,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:09,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 63 [2023-01-28 03:48:09,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:09,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 75 [2023-01-28 03:48:09,570 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-28 03:48:09,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 137 [2023-01-28 03:48:09,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:48:09,577 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:48:09,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:48:09,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 49 [2023-01-28 03:48:09,595 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-28 03:48:09,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 66 [2023-01-28 03:48:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:09,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610771176] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:48:09,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:48:09,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2023-01-28 03:48:09,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862502039] [2023-01-28 03:48:09,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:48:09,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 03:48:09,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:48:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 03:48:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1603, Unknown=1, NotChecked=82, Total=1892 [2023-01-28 03:48:09,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:48:09,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 1327 transitions, 28186 flow. Second operand has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:09,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:48:09,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:48:09,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:48:16,498 INFO L130 PetriNetUnfolder]: 3741/6911 cut-off events. [2023-01-28 03:48:16,498 INFO L131 PetriNetUnfolder]: For 232221/232221 co-relation queries the response was YES. [2023-01-28 03:48:16,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70475 conditions, 6911 events. 3741/6911 cut-off events. For 232221/232221 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 52069 event pairs, 191 based on Foata normal form. 6/6917 useless extension candidates. Maximal degree in co-relation 70203. Up to 4844 conditions per place. [2023-01-28 03:48:16,573 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1150 selfloop transitions, 393 changer transitions 21/1564 dead transitions. [2023-01-28 03:48:16,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1564 transitions, 35990 flow [2023-01-28 03:48:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-28 03:48:16,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-28 03:48:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2805 transitions. [2023-01-28 03:48:16,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27788785417079453 [2023-01-28 03:48:16,576 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2805 transitions. [2023-01-28 03:48:16,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2805 transitions. [2023-01-28 03:48:16,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:48:16,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2805 transitions. [2023-01-28 03:48:16,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 57.244897959183675) internal successors, (2805), 49 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:16,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:16,586 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:16,586 INFO L175 Difference]: Start difference. First operand has 542 places, 1327 transitions, 28186 flow. Second operand 49 states and 2805 transitions. [2023-01-28 03:48:16,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1564 transitions, 35990 flow [2023-01-28 03:48:18,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 1564 transitions, 34590 flow, removed 651 selfloop flow, removed 13 redundant places. [2023-01-28 03:48:18,558 INFO L231 Difference]: Finished difference. Result has 585 places, 1431 transitions, 31139 flow [2023-01-28 03:48:18,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=26811, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1001, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=31139, PETRI_PLACES=585, PETRI_TRANSITIONS=1431} [2023-01-28 03:48:18,559 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 564 predicate places. [2023-01-28 03:48:18,559 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 1431 transitions, 31139 flow [2023-01-28 03:48:18,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:18,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:48:18,559 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:48:18,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-28 03:48:18,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-01-28 03:48:18,760 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:48:18,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:48:18,760 INFO L85 PathProgramCache]: Analyzing trace with hash -970493305, now seen corresponding path program 49 times [2023-01-28 03:48:18,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:48:18,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206011236] [2023-01-28 03:48:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:48:18,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:48:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:48:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:19,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:48:19,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206011236] [2023-01-28 03:48:19,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206011236] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:48:19,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243217841] [2023-01-28 03:48:19,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:48:19,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:48:19,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:48:19,646 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:48:19,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-28 03:48:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:48:19,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 03:48:19,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:48:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:48:20,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:48:20,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:20,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 03:48:20,371 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 03:48:20,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 03:48:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:48:20,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243217841] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:48:20,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:48:20,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-28 03:48:20,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129173053] [2023-01-28 03:48:20,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:48:20,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 03:48:20,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:48:20,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 03:48:20,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 03:48:20,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:48:20,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 1431 transitions, 31139 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:20,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:48:20,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:48:20,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:48:25,393 INFO L130 PetriNetUnfolder]: 3917/7265 cut-off events. [2023-01-28 03:48:25,393 INFO L131 PetriNetUnfolder]: For 268519/268519 co-relation queries the response was YES. [2023-01-28 03:48:25,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76501 conditions, 7265 events. 3917/7265 cut-off events. For 268519/268519 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 54792 event pairs, 570 based on Foata normal form. 4/7269 useless extension candidates. Maximal degree in co-relation 75946. Up to 6433 conditions per place. [2023-01-28 03:48:25,478 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1252 selfloop transitions, 312 changer transitions 2/1566 dead transitions. [2023-01-28 03:48:25,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1566 transitions, 38372 flow [2023-01-28 03:48:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 03:48:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 03:48:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1844 transitions. [2023-01-28 03:48:25,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2797330097087379 [2023-01-28 03:48:25,481 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1844 transitions. [2023-01-28 03:48:25,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1844 transitions. [2023-01-28 03:48:25,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:48:25,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1844 transitions. [2023-01-28 03:48:25,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.625) internal successors, (1844), 32 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:25,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:25,486 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:25,486 INFO L175 Difference]: Start difference. First operand has 585 places, 1431 transitions, 31139 flow. Second operand 32 states and 1844 transitions. [2023-01-28 03:48:25,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1566 transitions, 38372 flow [2023-01-28 03:48:27,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 1566 transitions, 37711 flow, removed 277 selfloop flow, removed 23 redundant places. [2023-01-28 03:48:27,901 INFO L231 Difference]: Finished difference. Result has 601 places, 1493 transitions, 34392 flow [2023-01-28 03:48:27,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=30478, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=34392, PETRI_PLACES=601, PETRI_TRANSITIONS=1493} [2023-01-28 03:48:27,902 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 580 predicate places. [2023-01-28 03:48:27,902 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 1493 transitions, 34392 flow [2023-01-28 03:48:27,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:27,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:48:27,902 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:48:27,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-28 03:48:28,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:48:28,103 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:48:28,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:48:28,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1952573787, now seen corresponding path program 50 times [2023-01-28 03:48:28,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:48:28,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465857125] [2023-01-28 03:48:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:48:28,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:48:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:48:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:28,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:48:28,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465857125] [2023-01-28 03:48:28,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465857125] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:48:28,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983738892] [2023-01-28 03:48:28,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:48:28,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:48:28,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:48:28,816 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:48:28,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-28 03:48:28,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:48:28,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:48:28,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 03:48:28,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:48:29,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:29,302 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 15 treesize of output 14 [2023-01-28 03:48:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:29,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:48:29,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:29,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 114 [2023-01-28 03:48:30,344 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-28 03:48:30,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 65 [2023-01-28 03:48:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983738892] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:48:30,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:48:30,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-01-28 03:48:30,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890340376] [2023-01-28 03:48:30,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:48:30,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 03:48:30,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:48:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 03:48:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1586, Unknown=0, NotChecked=0, Total=1806 [2023-01-28 03:48:30,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:48:30,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 1493 transitions, 34392 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:30,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:48:30,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:48:30,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:48:36,060 INFO L130 PetriNetUnfolder]: 3959/7348 cut-off events. [2023-01-28 03:48:36,060 INFO L131 PetriNetUnfolder]: For 276502/276502 co-relation queries the response was YES. [2023-01-28 03:48:36,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78197 conditions, 7348 events. 3959/7348 cut-off events. For 276502/276502 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 55516 event pairs, 620 based on Foata normal form. 3/7351 useless extension candidates. Maximal degree in co-relation 77980. Up to 7025 conditions per place. [2023-01-28 03:48:36,146 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 1402 selfloop transitions, 154 changer transitions 3/1559 dead transitions. [2023-01-28 03:48:36,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 1559 transitions, 38657 flow [2023-01-28 03:48:36,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 03:48:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 03:48:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1942 transitions. [2023-01-28 03:48:36,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2772701313535123 [2023-01-28 03:48:36,148 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1942 transitions. [2023-01-28 03:48:36,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1942 transitions. [2023-01-28 03:48:36,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:48:36,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1942 transitions. [2023-01-28 03:48:36,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.11764705882353) internal successors, (1942), 34 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:36,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:36,153 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:36,153 INFO L175 Difference]: Start difference. First operand has 601 places, 1493 transitions, 34392 flow. Second operand 34 states and 1942 transitions. [2023-01-28 03:48:36,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 1559 transitions, 38657 flow [2023-01-28 03:48:38,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 1559 transitions, 36409 flow, removed 1048 selfloop flow, removed 18 redundant places. [2023-01-28 03:48:38,619 INFO L231 Difference]: Finished difference. Result has 619 places, 1506 transitions, 33323 flow [2023-01-28 03:48:38,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=32626, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=33323, PETRI_PLACES=619, PETRI_TRANSITIONS=1506} [2023-01-28 03:48:38,621 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 598 predicate places. [2023-01-28 03:48:38,621 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 1506 transitions, 33323 flow [2023-01-28 03:48:38,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:38,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:48:38,621 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:48:38,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-01-28 03:48:38,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-01-28 03:48:38,822 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:48:38,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:48:38,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1356416081, now seen corresponding path program 51 times [2023-01-28 03:48:38,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:48:38,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283368654] [2023-01-28 03:48:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:48:38,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:48:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:48:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:39,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:48:39,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283368654] [2023-01-28 03:48:39,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283368654] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:48:39,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201364463] [2023-01-28 03:48:39,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:48:39,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:48:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:48:39,579 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:48:39,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-28 03:48:39,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 03:48:39,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:48:39,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-01-28 03:48:39,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:48:39,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-01-28 03:48:39,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:48:39,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:48:40,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:40,165 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 14 [2023-01-28 03:48:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:48:40,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:48:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:48:41,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201364463] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:48:41,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:48:41,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 39 [2023-01-28 03:48:41,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920104310] [2023-01-28 03:48:41,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:48:41,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 03:48:41,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:48:41,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 03:48:41,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 03:48:41,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:48:41,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 1506 transitions, 33323 flow. Second operand has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:41,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:48:41,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:48:41,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:48:48,770 INFO L130 PetriNetUnfolder]: 4110/7661 cut-off events. [2023-01-28 03:48:48,770 INFO L131 PetriNetUnfolder]: For 290183/290183 co-relation queries the response was YES. [2023-01-28 03:48:48,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81401 conditions, 7661 events. 4110/7661 cut-off events. For 290183/290183 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 58709 event pairs, 588 based on Foata normal form. 4/7665 useless extension candidates. Maximal degree in co-relation 81180. Up to 6861 conditions per place. [2023-01-28 03:48:48,868 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1331 selfloop transitions, 314 changer transitions 8/1653 dead transitions. [2023-01-28 03:48:48,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 1653 transitions, 40722 flow [2023-01-28 03:48:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 03:48:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 03:48:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2290 transitions. [2023-01-28 03:48:48,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2779126213592233 [2023-01-28 03:48:48,871 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2290 transitions. [2023-01-28 03:48:48,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2290 transitions. [2023-01-28 03:48:48,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:48:48,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2290 transitions. [2023-01-28 03:48:48,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.25) internal successors, (2290), 40 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:48,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:48,876 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:48,876 INFO L175 Difference]: Start difference. First operand has 619 places, 1506 transitions, 33323 flow. Second operand 40 states and 2290 transitions. [2023-01-28 03:48:48,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 1653 transitions, 40722 flow [2023-01-28 03:48:51,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 1653 transitions, 40533 flow, removed 21 selfloop flow, removed 24 redundant places. [2023-01-28 03:48:51,824 INFO L231 Difference]: Finished difference. Result has 646 places, 1574 transitions, 37265 flow [2023-01-28 03:48:51,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=33134, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=37265, PETRI_PLACES=646, PETRI_TRANSITIONS=1574} [2023-01-28 03:48:51,825 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 625 predicate places. [2023-01-28 03:48:51,825 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 1574 transitions, 37265 flow [2023-01-28 03:48:51,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:51,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:48:51,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:48:51,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-01-28 03:48:52,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-28 03:48:52,026 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:48:52,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:48:52,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1894271659, now seen corresponding path program 52 times [2023-01-28 03:48:52,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:48:52,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388085809] [2023-01-28 03:48:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:48:52,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:48:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:48:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:52,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:48:52,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388085809] [2023-01-28 03:48:52,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388085809] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:48:52,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323265505] [2023-01-28 03:48:52,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:48:52,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:48:52,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:48:52,887 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:48:52,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-28 03:48:53,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:48:53,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:48:53,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 03:48:53,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:48:53,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:53,416 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 15 treesize of output 14 [2023-01-28 03:48:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:53,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:48:53,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:48:53,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-01-28 03:48:54,335 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-28 03:48:54,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-01-28 03:48:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:48:54,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323265505] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:48:54,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:48:54,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-01-28 03:48:54,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873124135] [2023-01-28 03:48:54,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:48:54,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 03:48:54,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:48:54,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 03:48:54,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 03:48:54,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:48:54,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 1574 transitions, 37265 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:48:54,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:48:54,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:48:54,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:49:00,337 INFO L130 PetriNetUnfolder]: 4212/7877 cut-off events. [2023-01-28 03:49:00,338 INFO L131 PetriNetUnfolder]: For 385078/385078 co-relation queries the response was YES. [2023-01-28 03:49:00,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90144 conditions, 7877 events. 4212/7877 cut-off events. For 385078/385078 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 61321 event pairs, 587 based on Foata normal form. 8/7885 useless extension candidates. Maximal degree in co-relation 89910. Up to 7280 conditions per place. [2023-01-28 03:49:00,436 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1432 selfloop transitions, 246 changer transitions 6/1684 dead transitions. [2023-01-28 03:49:00,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 1684 transitions, 43221 flow [2023-01-28 03:49:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 03:49:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 03:49:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1726 transitions. [2023-01-28 03:49:00,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27928802588996765 [2023-01-28 03:49:00,438 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1726 transitions. [2023-01-28 03:49:00,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1726 transitions. [2023-01-28 03:49:00,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:49:00,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1726 transitions. [2023-01-28 03:49:00,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.53333333333333) internal successors, (1726), 30 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:00,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:00,442 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:00,442 INFO L175 Difference]: Start difference. First operand has 646 places, 1574 transitions, 37265 flow. Second operand 30 states and 1726 transitions. [2023-01-28 03:49:00,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 1684 transitions, 43221 flow [2023-01-28 03:49:03,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 1684 transitions, 41064 flow, removed 958 selfloop flow, removed 25 redundant places. [2023-01-28 03:49:03,783 INFO L231 Difference]: Finished difference. Result has 654 places, 1622 transitions, 37692 flow [2023-01-28 03:49:03,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=35152, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=37692, PETRI_PLACES=654, PETRI_TRANSITIONS=1622} [2023-01-28 03:49:03,784 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 633 predicate places. [2023-01-28 03:49:03,784 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 1622 transitions, 37692 flow [2023-01-28 03:49:03,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:03,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:49:03,785 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:49:03,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-28 03:49:04,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:49:04,092 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:49:04,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:49:04,093 INFO L85 PathProgramCache]: Analyzing trace with hash 823650291, now seen corresponding path program 53 times [2023-01-28 03:49:04,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:49:04,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78360710] [2023-01-28 03:49:04,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:49:04,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:49:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:49:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:49:04,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:49:04,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78360710] [2023-01-28 03:49:04,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78360710] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:49:04,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008010505] [2023-01-28 03:49:04,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:49:04,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:49:04,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:49:04,798 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:49:04,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-28 03:49:04,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 03:49:04,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:49:04,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 03:49:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:49:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:49:05,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:49:05,320 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:05,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 03:49:05,451 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 03:49:05,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 03:49:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:49:05,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008010505] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:49:05,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:49:05,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-01-28 03:49:05,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678413736] [2023-01-28 03:49:05,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:49:05,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 03:49:05,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:49:05,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 03:49:05,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 03:49:05,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:49:05,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 1622 transitions, 37692 flow. Second operand has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:05,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:49:05,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:49:05,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:49:11,592 INFO L130 PetriNetUnfolder]: 4364/8216 cut-off events. [2023-01-28 03:49:11,593 INFO L131 PetriNetUnfolder]: For 425820/425820 co-relation queries the response was YES. [2023-01-28 03:49:11,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95495 conditions, 8216 events. 4364/8216 cut-off events. For 425820/425820 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 64669 event pairs, 625 based on Foata normal form. 6/8222 useless extension candidates. Maximal degree in co-relation 95259. Up to 7429 conditions per place. [2023-01-28 03:49:11,699 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 1522 selfloop transitions, 231 changer transitions 4/1757 dead transitions. [2023-01-28 03:49:11,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 1757 transitions, 45808 flow [2023-01-28 03:49:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 03:49:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 03:49:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1914 transitions. [2023-01-28 03:49:11,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2815533980582524 [2023-01-28 03:49:11,701 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1914 transitions. [2023-01-28 03:49:11,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1914 transitions. [2023-01-28 03:49:11,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:49:11,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1914 transitions. [2023-01-28 03:49:11,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.0) internal successors, (1914), 33 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:11,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:11,705 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:11,705 INFO L175 Difference]: Start difference. First operand has 654 places, 1622 transitions, 37692 flow. Second operand 33 states and 1914 transitions. [2023-01-28 03:49:11,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 1757 transitions, 45808 flow [2023-01-28 03:49:15,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 1757 transitions, 45274 flow, removed 222 selfloop flow, removed 17 redundant places. [2023-01-28 03:49:15,447 INFO L231 Difference]: Finished difference. Result has 673 places, 1665 transitions, 40638 flow [2023-01-28 03:49:15,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=37158, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=40638, PETRI_PLACES=673, PETRI_TRANSITIONS=1665} [2023-01-28 03:49:15,448 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 652 predicate places. [2023-01-28 03:49:15,448 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 1665 transitions, 40638 flow [2023-01-28 03:49:15,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:15,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:49:15,448 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:49:15,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-01-28 03:49:15,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:49:15,649 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:49:15,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:49:15,649 INFO L85 PathProgramCache]: Analyzing trace with hash -45333221, now seen corresponding path program 54 times [2023-01-28 03:49:15,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:49:15,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891237095] [2023-01-28 03:49:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:49:15,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:49:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:49:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:49:16,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:49:16,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891237095] [2023-01-28 03:49:16,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891237095] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:49:16,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711236632] [2023-01-28 03:49:16,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:49:16,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:49:16,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:49:16,304 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:49:16,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-28 03:49:16,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 03:49:16,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:49:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 110 conjunts are in the unsatisfiable core [2023-01-28 03:49:16,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:49:16,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:16,753 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 14 [2023-01-28 03:49:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:49:16,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:49:17,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:17,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 03:49:17,136 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 03:49:17,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 03:49:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:49:17,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711236632] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:49:17,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:49:17,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 35 [2023-01-28 03:49:17,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304436865] [2023-01-28 03:49:17,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:49:17,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 03:49:17,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:49:17,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 03:49:17,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 03:49:17,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:49:17,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 1665 transitions, 40638 flow. Second operand has 37 states, 37 states have (on average 61.62162162162162) internal successors, (2280), 37 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:17,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:49:17,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:49:17,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:49:23,878 INFO L130 PetriNetUnfolder]: 4388/8270 cut-off events. [2023-01-28 03:49:23,878 INFO L131 PetriNetUnfolder]: For 420261/420261 co-relation queries the response was YES. [2023-01-28 03:49:23,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96160 conditions, 8270 events. 4388/8270 cut-off events. For 420261/420261 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 65528 event pairs, 622 based on Foata normal form. 2/8272 useless extension candidates. Maximal degree in co-relation 95919. Up to 7513 conditions per place. [2023-01-28 03:49:24,002 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1473 selfloop transitions, 261 changer transitions 8/1742 dead transitions. [2023-01-28 03:49:24,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 1742 transitions, 45346 flow [2023-01-28 03:49:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 03:49:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 03:49:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2117 transitions. [2023-01-28 03:49:24,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31141512209473377 [2023-01-28 03:49:24,007 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2117 transitions. [2023-01-28 03:49:24,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2117 transitions. [2023-01-28 03:49:24,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:49:24,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2117 transitions. [2023-01-28 03:49:24,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 64.15151515151516) internal successors, (2117), 33 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:24,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:24,015 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:24,015 INFO L175 Difference]: Start difference. First operand has 673 places, 1665 transitions, 40638 flow. Second operand 33 states and 2117 transitions. [2023-01-28 03:49:24,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 1742 transitions, 45346 flow [2023-01-28 03:49:28,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1742 transitions, 43259 flow, removed 962 selfloop flow, removed 20 redundant places. [2023-01-28 03:49:28,199 INFO L231 Difference]: Finished difference. Result has 689 places, 1672 transitions, 39323 flow [2023-01-28 03:49:28,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38542, PETRI_DIFFERENCE_MINUEND_PLACES=652, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=39323, PETRI_PLACES=689, PETRI_TRANSITIONS=1672} [2023-01-28 03:49:28,201 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 668 predicate places. [2023-01-28 03:49:28,201 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 1672 transitions, 39323 flow [2023-01-28 03:49:28,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 61.62162162162162) internal successors, (2280), 37 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:28,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:49:28,201 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:49:28,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-28 03:49:28,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:49:28,402 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:49:28,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:49:28,402 INFO L85 PathProgramCache]: Analyzing trace with hash -934274975, now seen corresponding path program 55 times [2023-01-28 03:49:28,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:49:28,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966641997] [2023-01-28 03:49:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:49:28,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:49:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:49:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:49:29,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:49:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966641997] [2023-01-28 03:49:29,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966641997] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:49:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222129673] [2023-01-28 03:49:29,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:49:29,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:49:29,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:49:29,180 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:49:29,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-28 03:49:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:49:29,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-01-28 03:49:29,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:49:29,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:49:29,519 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 25 treesize of output 23 [2023-01-28 03:49:29,641 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:49:29,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:49:29,642 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:49:29,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:29,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2023-01-28 03:49:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:49:29,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:49:29,859 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse3 (+ c_~A~0.offset 8)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_2053 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053) c_~A~0.base))) (+ (select .cse1 c_~A~0.offset) (select .cse1 .cse2) (select .cse1 .cse3))))) (forall ((v_ArrVal_2053 (Array Int Int))) (< (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053) c_~A~0.base))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse2) (select .cse4 .cse3))) (+ .cse0 c_~counter~0 1))))) is different from false [2023-01-28 03:49:29,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:29,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 118 [2023-01-28 03:49:29,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:29,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 14 [2023-01-28 03:49:30,120 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:49:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-01-28 03:49:30,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222129673] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:49:30,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:49:30,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 35 [2023-01-28 03:49:30,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648930772] [2023-01-28 03:49:30,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:49:30,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 03:49:30,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:49:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 03:49:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1122, Unknown=16, NotChecked=68, Total=1332 [2023-01-28 03:49:30,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:49:30,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 1672 transitions, 39323 flow. Second operand has 37 states, 37 states have (on average 54.567567567567565) internal successors, (2019), 37 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:30,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:49:30,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:49:30,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:49:36,148 INFO L130 PetriNetUnfolder]: 4533/8543 cut-off events. [2023-01-28 03:49:36,148 INFO L131 PetriNetUnfolder]: For 439591/439591 co-relation queries the response was YES. [2023-01-28 03:49:36,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99420 conditions, 8543 events. 4533/8543 cut-off events. For 439591/439591 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 68156 event pairs, 571 based on Foata normal form. 5/8548 useless extension candidates. Maximal degree in co-relation 99173. Up to 7219 conditions per place. [2023-01-28 03:49:36,262 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1365 selfloop transitions, 408 changer transitions 1/1774 dead transitions. [2023-01-28 03:49:36,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 1774 transitions, 45010 flow [2023-01-28 03:49:36,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 03:49:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 03:49:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1270 transitions. [2023-01-28 03:49:36,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2802294792586055 [2023-01-28 03:49:36,263 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1270 transitions. [2023-01-28 03:49:36,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1270 transitions. [2023-01-28 03:49:36,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:49:36,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1270 transitions. [2023-01-28 03:49:36,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 57.72727272727273) internal successors, (1270), 22 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:36,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:36,267 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:36,267 INFO L175 Difference]: Start difference. First operand has 689 places, 1672 transitions, 39323 flow. Second operand 22 states and 1270 transitions. [2023-01-28 03:49:36,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 1774 transitions, 45010 flow [2023-01-28 03:49:40,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1774 transitions, 44415 flow, removed 97 selfloop flow, removed 26 redundant places. [2023-01-28 03:49:40,497 INFO L231 Difference]: Finished difference. Result has 689 places, 1716 transitions, 41348 flow [2023-01-28 03:49:40,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38728, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=41348, PETRI_PLACES=689, PETRI_TRANSITIONS=1716} [2023-01-28 03:49:40,498 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 668 predicate places. [2023-01-28 03:49:40,498 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 1716 transitions, 41348 flow [2023-01-28 03:49:40,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.567567567567565) internal successors, (2019), 37 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:40,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:49:40,499 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:49:40,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-01-28 03:49:40,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-01-28 03:49:40,704 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:49:40,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:49:40,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1135077057, now seen corresponding path program 56 times [2023-01-28 03:49:40,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:49:40,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740636641] [2023-01-28 03:49:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:49:40,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:49:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:49:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:49:41,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:49:41,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740636641] [2023-01-28 03:49:41,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740636641] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:49:41,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334948579] [2023-01-28 03:49:41,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:49:41,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:49:41,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:49:41,445 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:49:41,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-28 03:49:41,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:49:41,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:49:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 102 conjunts are in the unsatisfiable core [2023-01-28 03:49:41,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:49:41,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:49:41,719 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 20 treesize of output 20 [2023-01-28 03:49:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:49:41,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:49:42,042 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (.cse1 (+ c_~A~0.offset 4)) (.cse2 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_2092 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2092) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ c_~counter~0 (select .cse0 .cse3) 1)))) (forall ((v_ArrVal_2092 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2092) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse4 .cse3)) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1) (select .cse4 .cse2))))))) is different from false [2023-01-28 03:49:42,050 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse4 (+ c_~A~0.offset 8)) (.cse1 (+ c_~A~0.offset .cse6 4)) (.cse2 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6)))) (and (forall ((v_ArrVal_2092 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2092) c_~A~0.base))) (<= (+ (select .cse0 .cse1) .cse2 c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse3) (select .cse0 .cse4))))) (forall ((v_ArrVal_2092 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2092) c_~A~0.base))) (< (+ (select .cse5 c_~A~0.offset) (select .cse5 .cse3) (select .cse5 .cse4)) (+ (select .cse5 .cse1) .cse2 c_~counter~0 1))))))) is different from false [2023-01-28 03:49:42,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:42,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 125 [2023-01-28 03:49:42,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:42,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-01-28 03:49:42,231 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:49:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-01-28 03:49:42,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334948579] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:49:42,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:49:42,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2023-01-28 03:49:42,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236169175] [2023-01-28 03:49:42,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:49:42,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 03:49:42,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:49:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 03:49:42,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1004, Unknown=2, NotChecked=130, Total=1260 [2023-01-28 03:49:42,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:49:42,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 1716 transitions, 41348 flow. Second operand has 36 states, 36 states have (on average 54.5) internal successors, (1962), 36 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:42,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:49:42,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:49:42,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:49:49,780 INFO L130 PetriNetUnfolder]: 4929/9297 cut-off events. [2023-01-28 03:49:49,780 INFO L131 PetriNetUnfolder]: For 521108/521108 co-relation queries the response was YES. [2023-01-28 03:49:49,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111079 conditions, 9297 events. 4929/9297 cut-off events. For 521108/521108 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 75577 event pairs, 658 based on Foata normal form. 2/9299 useless extension candidates. Maximal degree in co-relation 110828. Up to 7983 conditions per place. [2023-01-28 03:49:49,905 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1487 selfloop transitions, 451 changer transitions 1/1939 dead transitions. [2023-01-28 03:49:49,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 1939 transitions, 51515 flow [2023-01-28 03:49:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 03:49:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 03:49:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2018 transitions. [2023-01-28 03:49:49,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2798890429958391 [2023-01-28 03:49:49,908 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2018 transitions. [2023-01-28 03:49:49,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2018 transitions. [2023-01-28 03:49:49,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:49:49,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2018 transitions. [2023-01-28 03:49:49,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.65714285714286) internal successors, (2018), 35 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:49,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:49,912 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:49,912 INFO L175 Difference]: Start difference. First operand has 689 places, 1716 transitions, 41348 flow. Second operand 35 states and 2018 transitions. [2023-01-28 03:49:49,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 1939 transitions, 51515 flow [2023-01-28 03:49:54,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 707 places, 1939 transitions, 49952 flow, removed 588 selfloop flow, removed 16 redundant places. [2023-01-28 03:49:54,746 INFO L231 Difference]: Finished difference. Result has 718 places, 1846 transitions, 46147 flow [2023-01-28 03:49:54,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=40181, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=46147, PETRI_PLACES=718, PETRI_TRANSITIONS=1846} [2023-01-28 03:49:54,748 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 697 predicate places. [2023-01-28 03:49:54,748 INFO L495 AbstractCegarLoop]: Abstraction has has 718 places, 1846 transitions, 46147 flow [2023-01-28 03:49:54,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 54.5) internal successors, (1962), 36 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:54,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:49:54,749 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:49:54,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-01-28 03:49:54,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-01-28 03:49:54,949 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:49:54,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:49:54,950 INFO L85 PathProgramCache]: Analyzing trace with hash 701657255, now seen corresponding path program 57 times [2023-01-28 03:49:54,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:49:54,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615266790] [2023-01-28 03:49:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:49:54,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:49:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:49:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:49:55,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:49:55,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615266790] [2023-01-28 03:49:55,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615266790] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:49:55,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237213489] [2023-01-28 03:49:55,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:49:55,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:49:55,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:49:55,667 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:49:55,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-28 03:49:55,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 03:49:55,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:49:55,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-01-28 03:49:55,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:49:55,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 03:49:55,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:49:55,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:49:56,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:49:56,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:56,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-28 03:49:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:49:56,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:49:57,068 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_subst_29 Int) (v_ArrVal_2134 (Array Int Int))) (or (<= c_~N~0 (+ v_subst_29 1)) (< (+ 2 v_subst_29) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2134) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 .cse2)) (let ((.cse3 (* v_subst_29 4))) (+ (select .cse0 (+ c_~A~0.offset 4 .cse3)) c_~counter~0 1 (select .cse0 (+ c_~A~0.offset .cse3)))))))) (forall ((v_ArrVal_2134 (Array Int Int)) (v_subst_30 Int)) (or (<= c_~N~0 (+ v_subst_30 1)) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2134) c_~A~0.base))) (<= (let ((.cse5 (* v_subst_30 4))) (+ (select .cse4 (+ c_~A~0.offset .cse5 4)) c_~counter~0 (select .cse4 (+ c_~A~0.offset .cse5)))) (+ (select .cse4 .cse1) (select .cse4 .cse2)))) (< (+ 2 v_subst_30) c_~N~0))))) is different from false [2023-01-28 03:49:57,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:57,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 75 [2023-01-28 03:49:57,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:57,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 300 [2023-01-28 03:49:57,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:57,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 66 [2023-01-28 03:49:57,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:57,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 65 [2023-01-28 03:49:57,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:49:57,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 74 [2023-01-28 03:49:57,546 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-28 03:49:57,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 318 treesize of output 268 [2023-01-28 03:49:57,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:49:57,577 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:49:57,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:49:57,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 21 [2023-01-28 03:49:57,592 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-28 03:49:57,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 39 [2023-01-28 03:49:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:49:57,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237213489] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:49:57,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:49:57,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 03:49:57,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600758917] [2023-01-28 03:49:57,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:49:57,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 03:49:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:49:57,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 03:49:57,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1686, Unknown=1, NotChecked=84, Total=1980 [2023-01-28 03:49:57,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:49:57,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 718 places, 1846 transitions, 46147 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:49:57,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:49:57,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:49:57,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:07,610 INFO L130 PetriNetUnfolder]: 5192/9756 cut-off events. [2023-01-28 03:50:07,610 INFO L131 PetriNetUnfolder]: For 580389/580389 co-relation queries the response was YES. [2023-01-28 03:50:07,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119830 conditions, 9756 events. 5192/9756 cut-off events. For 580389/580389 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 79564 event pairs, 85 based on Foata normal form. 4/9760 useless extension candidates. Maximal degree in co-relation 119568. Up to 4843 conditions per place. [2023-01-28 03:50:07,748 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 1327 selfloop transitions, 750 changer transitions 17/2094 dead transitions. [2023-01-28 03:50:07,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 2094 transitions, 57277 flow [2023-01-28 03:50:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-28 03:50:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-28 03:50:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3423 transitions. [2023-01-28 03:50:07,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27694174757281553 [2023-01-28 03:50:07,751 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3423 transitions. [2023-01-28 03:50:07,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3423 transitions. [2023-01-28 03:50:07,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:07,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3423 transitions. [2023-01-28 03:50:07,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.05) internal successors, (3423), 60 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:07,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:07,763 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:07,763 INFO L175 Difference]: Start difference. First operand has 718 places, 1846 transitions, 46147 flow. Second operand 60 states and 3423 transitions. [2023-01-28 03:50:07,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 2094 transitions, 57277 flow [2023-01-28 03:50:13,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 2094 transitions, 55142 flow, removed 911 selfloop flow, removed 20 redundant places. [2023-01-28 03:50:13,168 INFO L231 Difference]: Finished difference. Result has 771 places, 1984 transitions, 52001 flow [2023-01-28 03:50:13,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=44058, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=630, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=52001, PETRI_PLACES=771, PETRI_TRANSITIONS=1984} [2023-01-28 03:50:13,170 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 750 predicate places. [2023-01-28 03:50:13,170 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 1984 transitions, 52001 flow [2023-01-28 03:50:13,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:13,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:13,171 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:50:13,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-28 03:50:13,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-01-28 03:50:13,377 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:50:13,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash -783199649, now seen corresponding path program 58 times [2023-01-28 03:50:13,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:13,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213329427] [2023-01-28 03:50:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:13,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:50:14,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:14,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213329427] [2023-01-28 03:50:14,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213329427] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:50:14,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547825096] [2023-01-28 03:50:14,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:50:14,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:14,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:14,126 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:50:14,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-28 03:50:14,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:50:14,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:50:14,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 03:50:14,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:50:14,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:14,671 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 15 treesize of output 14 [2023-01-28 03:50:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:50:14,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:50:15,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:15,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 114 [2023-01-28 03:50:15,703 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-28 03:50:15,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 65 [2023-01-28 03:50:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:50:16,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547825096] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:50:16,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:50:16,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-01-28 03:50:16,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314565039] [2023-01-28 03:50:16,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:50:16,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 03:50:16,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 03:50:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 03:50:16,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:50:16,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 1984 transitions, 52001 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:16,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:16,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:50:16,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:25,999 INFO L130 PetriNetUnfolder]: 5417/10209 cut-off events. [2023-01-28 03:50:25,999 INFO L131 PetriNetUnfolder]: For 688406/688406 co-relation queries the response was YES. [2023-01-28 03:50:26,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131190 conditions, 10209 events. 5417/10209 cut-off events. For 688406/688406 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 84274 event pairs, 768 based on Foata normal form. 8/10217 useless extension candidates. Maximal degree in co-relation 130915. Up to 9498 conditions per place. [2023-01-28 03:50:26,253 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1900 selfloop transitions, 254 changer transitions 8/2162 dead transitions. [2023-01-28 03:50:26,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 2162 transitions, 60522 flow [2023-01-28 03:50:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 03:50:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 03:50:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2414 transitions. [2023-01-28 03:50:26,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27901063337956544 [2023-01-28 03:50:26,256 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2414 transitions. [2023-01-28 03:50:26,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2414 transitions. [2023-01-28 03:50:26,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:26,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2414 transitions. [2023-01-28 03:50:26,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.476190476190474) internal successors, (2414), 42 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:26,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 206.0) internal successors, (8858), 43 states have internal predecessors, (8858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:26,261 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 206.0) internal successors, (8858), 43 states have internal predecessors, (8858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:26,261 INFO L175 Difference]: Start difference. First operand has 771 places, 1984 transitions, 52001 flow. Second operand 42 states and 2414 transitions. [2023-01-28 03:50:26,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 2162 transitions, 60522 flow [2023-01-28 03:50:34,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 791 places, 2162 transitions, 57341 flow, removed 1535 selfloop flow, removed 21 redundant places. [2023-01-28 03:50:34,575 INFO L231 Difference]: Finished difference. Result has 797 places, 2061 transitions, 52765 flow [2023-01-28 03:50:34,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=49011, PETRI_DIFFERENCE_MINUEND_PLACES=750, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=52765, PETRI_PLACES=797, PETRI_TRANSITIONS=2061} [2023-01-28 03:50:34,576 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 776 predicate places. [2023-01-28 03:50:34,576 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 2061 transitions, 52765 flow [2023-01-28 03:50:34,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:34,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:34,577 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:50:34,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-01-28 03:50:34,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:34,777 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:50:34,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash -254990151, now seen corresponding path program 59 times [2023-01-28 03:50:34,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:34,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908273951] [2023-01-28 03:50:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:34,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:50:35,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:35,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908273951] [2023-01-28 03:50:35,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908273951] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:50:35,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982975855] [2023-01-28 03:50:35,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:50:35,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:35,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:35,392 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:50:35,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-28 03:50:35,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 03:50:35,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:50:35,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 03:50:35,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:50:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:50:35,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:50:36,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:36,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 03:50:36,129 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 03:50:36,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 03:50:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:50:36,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982975855] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:50:36,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:50:36,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-01-28 03:50:36,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87479728] [2023-01-28 03:50:36,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:50:36,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 03:50:36,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:36,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 03:50:36,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 03:50:36,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:50:36,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 2061 transitions, 52765 flow. Second operand has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:36,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:36,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:50:36,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:44,523 INFO L130 PetriNetUnfolder]: 5542/10476 cut-off events. [2023-01-28 03:50:44,523 INFO L131 PetriNetUnfolder]: For 711356/711356 co-relation queries the response was YES. [2023-01-28 03:50:44,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133793 conditions, 10476 events. 5542/10476 cut-off events. For 711356/711356 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 86741 event pairs, 940 based on Foata normal form. 8/10484 useless extension candidates. Maximal degree in co-relation 133513. Up to 9928 conditions per place. [2023-01-28 03:50:44,683 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1947 selfloop transitions, 216 changer transitions 4/2167 dead transitions. [2023-01-28 03:50:44,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 823 places, 2167 transitions, 60646 flow [2023-01-28 03:50:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 03:50:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 03:50:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1741 transitions. [2023-01-28 03:50:44,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3130169003955412 [2023-01-28 03:50:44,685 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1741 transitions. [2023-01-28 03:50:44,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1741 transitions. [2023-01-28 03:50:44,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:44,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1741 transitions. [2023-01-28 03:50:44,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 64.48148148148148) internal successors, (1741), 27 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:44,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 206.0) internal successors, (5768), 28 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:44,689 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 206.0) internal successors, (5768), 28 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:44,689 INFO L175 Difference]: Start difference. First operand has 797 places, 2061 transitions, 52765 flow. Second operand 27 states and 1741 transitions. [2023-01-28 03:50:44,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 823 places, 2167 transitions, 60646 flow [2023-01-28 03:50:53,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 2167 transitions, 59673 flow, removed 412 selfloop flow, removed 23 redundant places. [2023-01-28 03:50:53,043 INFO L231 Difference]: Finished difference. Result has 806 places, 2107 transitions, 54892 flow [2023-01-28 03:50:53,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=51792, PETRI_DIFFERENCE_MINUEND_PLACES=774, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=54892, PETRI_PLACES=806, PETRI_TRANSITIONS=2107} [2023-01-28 03:50:53,045 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 785 predicate places. [2023-01-28 03:50:53,045 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 2107 transitions, 54892 flow [2023-01-28 03:50:53,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:53,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:53,046 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:50:53,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-01-28 03:50:53,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:53,248 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:50:53,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash 60483307, now seen corresponding path program 60 times [2023-01-28 03:50:53,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:53,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954498427] [2023-01-28 03:50:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:53,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:50:53,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:53,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954498427] [2023-01-28 03:50:53,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954498427] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:50:53,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58483338] [2023-01-28 03:50:53,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:50:53,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:53,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:53,768 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:50:53,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-01-28 03:50:54,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 03:50:54,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:50:54,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-01-28 03:50:54,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:50:54,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 03:50:54,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:50:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:50:54,366 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 20 treesize of output 20 [2023-01-28 03:50:54,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:54,541 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 14 [2023-01-28 03:50:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:50:54,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:50:55,002 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2252 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2252) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset))) (+ .cse2 c_~counter~0 1))) (forall ((v_ArrVal_2252 (Array Int Int))) (<= (+ .cse2 c_~counter~0) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2252) c_~A~0.base))) (+ (select .cse3 .cse1) (select .cse3 c_~A~0.offset))))))) is different from false [2023-01-28 03:50:55,012 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| c_~A~0.base)) (.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse2 (select .cse5 (+ c_~A~0.offset .cse6))) (.cse3 (select .cse5 (+ c_~A~0.offset .cse6 4))) (.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2252 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2252) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset))) (+ .cse2 c_~counter~0 .cse3 1))) (forall ((v_ArrVal_2252 (Array Int Int))) (<= (+ .cse2 c_~counter~0 .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2252) c_~A~0.base))) (+ (select .cse4 .cse1) (select .cse4 c_~A~0.offset)))))))) is different from false [2023-01-28 03:50:55,019 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset 4)) (.cse5 (select |c_#memory_int| c_~A~0.base))) (let ((.cse0 (select .cse5 c_~A~0.offset)) (.cse1 (select .cse5 .cse3))) (and (forall ((v_ArrVal_2252 (Array Int Int))) (<= (+ .cse0 c_~counter~0 .cse1) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2252) c_~A~0.base))) (+ (select .cse2 .cse3) (select .cse2 c_~A~0.offset))))) (forall ((v_ArrVal_2252 (Array Int Int))) (< (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2252) c_~A~0.base))) (+ (select .cse4 .cse3) (select .cse4 c_~A~0.offset))) (+ .cse0 c_~counter~0 .cse1 1)))))) is different from false [2023-01-28 03:50:55,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:55,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 59 [2023-01-28 03:50:55,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:55,104 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 212 treesize of output 172 [2023-01-28 03:50:55,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:55,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2023-01-28 03:50:55,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:55,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 25 [2023-01-28 03:50:55,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:55,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 60 [2023-01-28 03:50:55,136 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:50:55,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:55,139 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 90 treesize of output 70 [2023-01-28 03:50:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-01-28 03:50:55,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58483338] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:50:55,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:50:55,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 43 [2023-01-28 03:50:55,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457186134] [2023-01-28 03:50:55,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:50:55,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 03:50:55,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:55,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 03:50:55,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1510, Unknown=9, NotChecked=246, Total=1980 [2023-01-28 03:50:55,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:50:55,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 2107 transitions, 54892 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:55,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:55,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:50:55,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:51:10,674 INFO L130 PetriNetUnfolder]: 5965/11337 cut-off events. [2023-01-28 03:51:10,674 INFO L131 PetriNetUnfolder]: For 795811/795811 co-relation queries the response was YES. [2023-01-28 03:51:10,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146030 conditions, 11337 events. 5965/11337 cut-off events. For 795811/795811 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 95961 event pairs, 897 based on Foata normal form. 7/11344 useless extension candidates. Maximal degree in co-relation 145743. Up to 10082 conditions per place. [2023-01-28 03:51:10,854 INFO L137 encePairwiseOnDemand]: 193/206 looper letters, 1959 selfloop transitions, 411 changer transitions 8/2378 dead transitions. [2023-01-28 03:51:10,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 855 places, 2378 transitions, 66792 flow [2023-01-28 03:51:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-01-28 03:51:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-01-28 03:51:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2896 transitions. [2023-01-28 03:51:10,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28116504854368934 [2023-01-28 03:51:10,857 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2896 transitions. [2023-01-28 03:51:10,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2896 transitions. [2023-01-28 03:51:10,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:51:10,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2896 transitions. [2023-01-28 03:51:10,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.92) internal successors, (2896), 50 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:51:10,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 206.0) internal successors, (10506), 51 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:51:10,864 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 206.0) internal successors, (10506), 51 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:51:10,864 INFO L175 Difference]: Start difference. First operand has 806 places, 2107 transitions, 54892 flow. Second operand 50 states and 2896 transitions. [2023-01-28 03:51:10,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 855 places, 2378 transitions, 66792 flow [2023-01-28 03:51:21,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 2378 transitions, 65009 flow, removed 802 selfloop flow, removed 14 redundant places. [2023-01-28 03:51:21,071 INFO L231 Difference]: Finished difference. Result has 855 places, 2264 transitions, 59584 flow [2023-01-28 03:51:21,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=53127, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=59584, PETRI_PLACES=855, PETRI_TRANSITIONS=2264} [2023-01-28 03:51:21,072 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 834 predicate places. [2023-01-28 03:51:21,072 INFO L495 AbstractCegarLoop]: Abstraction has has 855 places, 2264 transitions, 59584 flow [2023-01-28 03:51:21,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:51:21,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:51:21,073 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:51:21,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-01-28 03:51:21,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-01-28 03:51:21,273 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:51:21,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:51:21,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1818222523, now seen corresponding path program 61 times [2023-01-28 03:51:21,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:51:21,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711413012] [2023-01-28 03:51:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:51:21,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:51:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:51:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:51:22,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:51:22,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711413012] [2023-01-28 03:51:22,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711413012] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:51:22,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371024532] [2023-01-28 03:51:22,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:51:22,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:51:22,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:51:22,109 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:51:22,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-01-28 03:51:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:51:22,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 110 conjunts are in the unsatisfiable core [2023-01-28 03:51:22,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:51:22,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:51:22,422 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 [2023-01-28 03:51:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:51:22,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:51:22,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:51:22,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 134 [2023-01-28 03:51:22,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:51:22,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 70 [2023-01-28 03:51:23,237 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:51:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:51:23,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371024532] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:51:23,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:51:23,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-01-28 03:51:23,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861625693] [2023-01-28 03:51:23,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:51:23,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 03:51:23,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:51:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 03:51:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1321, Unknown=9, NotChecked=0, Total=1482 [2023-01-28 03:51:23,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:51:23,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 855 places, 2264 transitions, 59584 flow. Second operand has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:51:23,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:51:23,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:51:23,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:51:34,041 INFO L130 PetriNetUnfolder]: 6175/11726 cut-off events. [2023-01-28 03:51:34,042 INFO L131 PetriNetUnfolder]: For 928366/928366 co-relation queries the response was YES. [2023-01-28 03:51:34,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160273 conditions, 11726 events. 6175/11726 cut-off events. For 928366/928366 co-relation queries the response was YES. Maximal size of possible extension queue 912. Compared 99790 event pairs, 930 based on Foata normal form. 6/11732 useless extension candidates. Maximal degree in co-relation 159971. Up to 10009 conditions per place. [2023-01-28 03:51:34,390 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1882 selfloop transitions, 542 changer transitions 3/2427 dead transitions. [2023-01-28 03:51:34,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 882 places, 2427 transitions, 70394 flow [2023-01-28 03:51:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 03:51:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 03:51:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1682 transitions. [2023-01-28 03:51:34,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2815533980582524 [2023-01-28 03:51:34,392 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1682 transitions. [2023-01-28 03:51:34,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1682 transitions. [2023-01-28 03:51:34,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:51:34,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1682 transitions. [2023-01-28 03:51:34,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 58.0) internal successors, (1682), 29 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:51:34,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:51:34,396 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:51:34,396 INFO L175 Difference]: Start difference. First operand has 855 places, 2264 transitions, 59584 flow. Second operand 29 states and 1682 transitions. [2023-01-28 03:51:34,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 882 places, 2427 transitions, 70394 flow [2023-01-28 03:51:46,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 862 places, 2427 transitions, 69486 flow, removed 377 selfloop flow, removed 20 redundant places. [2023-01-28 03:51:46,086 INFO L231 Difference]: Finished difference. Result has 869 places, 2339 transitions, 64511 flow [2023-01-28 03:51:46,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=58680, PETRI_DIFFERENCE_MINUEND_PLACES=834, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=64511, PETRI_PLACES=869, PETRI_TRANSITIONS=2339} [2023-01-28 03:51:46,088 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 848 predicate places. [2023-01-28 03:51:46,088 INFO L495 AbstractCegarLoop]: Abstraction has has 869 places, 2339 transitions, 64511 flow [2023-01-28 03:51:46,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:51:46,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:51:46,089 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:51:46,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-01-28 03:51:46,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-01-28 03:51:46,293 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:51:46,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:51:46,293 INFO L85 PathProgramCache]: Analyzing trace with hash -245344071, now seen corresponding path program 62 times [2023-01-28 03:51:46,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:51:46,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42426312] [2023-01-28 03:51:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:51:46,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:51:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:51:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:51:46,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:51:46,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42426312] [2023-01-28 03:51:46,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42426312] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:51:46,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954410550] [2023-01-28 03:51:46,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:51:46,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:51:46,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:51:46,917 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:51:46,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-01-28 03:51:47,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:51:47,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:51:47,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-01-28 03:51:47,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:51:47,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:51:47,413 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 15 treesize of output 14 [2023-01-28 03:51:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:51:47,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:51:51,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:51:51,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-01-28 03:51:51,606 INFO L321 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-01-28 03:51:51,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 24 [2023-01-28 03:51:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:51:51,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954410550] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:51:51,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:51:51,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-01-28 03:51:51,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306734677] [2023-01-28 03:51:51,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:51:51,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 03:51:51,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:51:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 03:51:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1433, Unknown=1, NotChecked=0, Total=1640 [2023-01-28 03:51:51,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:51:51,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 869 places, 2339 transitions, 64511 flow. Second operand has 41 states, 41 states have (on average 54.4390243902439) internal successors, (2232), 41 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:51:51,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:51:51,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:51:51,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:52:03,096 INFO L130 PetriNetUnfolder]: 6258/11890 cut-off events. [2023-01-28 03:52:03,096 INFO L131 PetriNetUnfolder]: For 949583/949583 co-relation queries the response was YES. [2023-01-28 03:52:03,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164950 conditions, 11890 events. 6258/11890 cut-off events. For 949583/949583 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 101505 event pairs, 1092 based on Foata normal form. 3/11893 useless extension candidates. Maximal degree in co-relation 164641. Up to 11323 conditions per place. [2023-01-28 03:52:03,298 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 2188 selfloop transitions, 228 changer transitions 1/2417 dead transitions. [2023-01-28 03:52:03,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 889 places, 2417 transitions, 71718 flow [2023-01-28 03:52:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 03:52:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 03:52:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1217 transitions. [2023-01-28 03:52:03,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28132223763291725 [2023-01-28 03:52:03,300 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1217 transitions. [2023-01-28 03:52:03,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1217 transitions. [2023-01-28 03:52:03,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:52:03,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1217 transitions. [2023-01-28 03:52:03,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.95238095238095) internal successors, (1217), 21 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:03,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 206.0) internal successors, (4532), 22 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:03,303 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 206.0) internal successors, (4532), 22 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:03,303 INFO L175 Difference]: Start difference. First operand has 869 places, 2339 transitions, 64511 flow. Second operand 21 states and 1217 transitions. [2023-01-28 03:52:03,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 889 places, 2417 transitions, 71718 flow [2023-01-28 03:52:15,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 871 places, 2417 transitions, 69671 flow, removed 912 selfloop flow, removed 18 redundant places. [2023-01-28 03:52:15,888 INFO L231 Difference]: Finished difference. Result has 875 places, 2365 transitions, 64805 flow [2023-01-28 03:52:15,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=62520, PETRI_DIFFERENCE_MINUEND_PLACES=851, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=64805, PETRI_PLACES=875, PETRI_TRANSITIONS=2365} [2023-01-28 03:52:15,890 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 854 predicate places. [2023-01-28 03:52:15,890 INFO L495 AbstractCegarLoop]: Abstraction has has 875 places, 2365 transitions, 64805 flow [2023-01-28 03:52:15,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 54.4390243902439) internal successors, (2232), 41 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:15,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:52:15,890 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:52:15,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-01-28 03:52:16,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:52:16,091 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:52:16,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:52:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1644674265, now seen corresponding path program 63 times [2023-01-28 03:52:16,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:52:16,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971931421] [2023-01-28 03:52:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:52:16,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:52:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:52:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:52:16,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:52:16,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971931421] [2023-01-28 03:52:16,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971931421] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:52:16,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617875405] [2023-01-28 03:52:16,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:52:16,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:52:16,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:52:16,791 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:52:16,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-01-28 03:52:17,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 03:52:17,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:52:17,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-01-28 03:52:17,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:52:17,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-01-28 03:52:17,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:52:17,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:52:18,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:52:18,052 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 14 [2023-01-28 03:52:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:52:18,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:52:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:52:19,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617875405] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:52:19,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:52:19,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 39 [2023-01-28 03:52:19,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751637009] [2023-01-28 03:52:19,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:52:19,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 03:52:19,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:52:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 03:52:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1468, Unknown=1, NotChecked=0, Total=1640 [2023-01-28 03:52:19,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:52:19,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 875 places, 2365 transitions, 64805 flow. Second operand has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:19,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:52:19,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:52:19,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:52:35,702 INFO L130 PetriNetUnfolder]: 6390/12147 cut-off events. [2023-01-28 03:52:35,702 INFO L131 PetriNetUnfolder]: For 967453/967453 co-relation queries the response was YES. [2023-01-28 03:52:35,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168404 conditions, 12147 events. 6390/12147 cut-off events. For 967453/967453 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 104190 event pairs, 1119 based on Foata normal form. 1/12148 useless extension candidates. Maximal degree in co-relation 168091. Up to 11231 conditions per place. [2023-01-28 03:52:35,902 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2085 selfloop transitions, 408 changer transitions 5/2498 dead transitions. [2023-01-28 03:52:35,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 913 places, 2498 transitions, 74014 flow [2023-01-28 03:52:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 03:52:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 03:52:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2217 transitions. [2023-01-28 03:52:35,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2759522031366692 [2023-01-28 03:52:35,903 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2217 transitions. [2023-01-28 03:52:35,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2217 transitions. [2023-01-28 03:52:35,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:52:35,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2217 transitions. [2023-01-28 03:52:35,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.84615384615385) internal successors, (2217), 39 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:35,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:35,908 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:35,909 INFO L175 Difference]: Start difference. First operand has 875 places, 2365 transitions, 64805 flow. Second operand 39 states and 2217 transitions. [2023-01-28 03:52:35,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 913 places, 2498 transitions, 74014 flow [2023-01-28 03:52:48,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 902 places, 2498 transitions, 72983 flow, removed 446 selfloop flow, removed 11 redundant places. [2023-01-28 03:52:48,407 INFO L231 Difference]: Finished difference. Result has 911 places, 2428 transitions, 68207 flow [2023-01-28 03:52:48,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=63774, PETRI_DIFFERENCE_MINUEND_PLACES=864, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=68207, PETRI_PLACES=911, PETRI_TRANSITIONS=2428} [2023-01-28 03:52:48,408 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 890 predicate places. [2023-01-28 03:52:48,408 INFO L495 AbstractCegarLoop]: Abstraction has has 911 places, 2428 transitions, 68207 flow [2023-01-28 03:52:48,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:48,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:52:48,409 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:52:48,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-01-28 03:52:48,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-01-28 03:52:48,609 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:52:48,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:52:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash 270342909, now seen corresponding path program 64 times [2023-01-28 03:52:48,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:52:48,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824837831] [2023-01-28 03:52:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:52:48,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:52:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:52:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:52:49,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:52:49,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824837831] [2023-01-28 03:52:49,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824837831] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:52:49,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92423702] [2023-01-28 03:52:49,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:52:49,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:52:49,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:52:49,437 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:52:49,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-01-28 03:52:49,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:52:49,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:52:49,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 114 conjunts are in the unsatisfiable core [2023-01-28 03:52:49,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:52:49,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:52:49,795 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 [2023-01-28 03:52:49,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:52:49,977 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 15 treesize of output 14 [2023-01-28 03:52:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:52:50,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:52:56,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:52:56,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 156 [2023-01-28 03:52:56,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:52:56,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 90 [2023-01-28 03:52:56,724 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:52:56,751 INFO L321 Elim1Store]: treesize reduction 86, result has 13.1 percent of original size [2023-01-28 03:52:56,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 23 [2023-01-28 03:52:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:52:57,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92423702] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:52:57,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:52:57,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 03:52:57,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599717995] [2023-01-28 03:52:57,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:52:57,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 03:52:57,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:52:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 03:52:57,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1733, Unknown=10, NotChecked=0, Total=1980 [2023-01-28 03:52:57,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:52:57,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 2428 transitions, 68207 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:57,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:52:57,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:52:57,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:53:13,181 INFO L130 PetriNetUnfolder]: 6544/12439 cut-off events. [2023-01-28 03:53:13,181 INFO L131 PetriNetUnfolder]: For 1066182/1066182 co-relation queries the response was YES. [2023-01-28 03:53:13,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176584 conditions, 12439 events. 6544/12439 cut-off events. For 1066182/1066182 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 107164 event pairs, 947 based on Foata normal form. 3/12442 useless extension candidates. Maximal degree in co-relation 176261. Up to 10792 conditions per place. [2023-01-28 03:53:13,405 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 1899 selfloop transitions, 676 changer transitions 3/2578 dead transitions. [2023-01-28 03:53:13,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 958 places, 2578 transitions, 77702 flow [2023-01-28 03:53:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-01-28 03:53:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-01-28 03:53:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2744 transitions. [2023-01-28 03:53:13,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27750809061488674 [2023-01-28 03:53:13,408 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2744 transitions. [2023-01-28 03:53:13,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2744 transitions. [2023-01-28 03:53:13,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:53:13,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2744 transitions. [2023-01-28 03:53:13,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 57.166666666666664) internal successors, (2744), 48 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:13,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 206.0) internal successors, (10094), 49 states have internal predecessors, (10094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:13,414 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 206.0) internal successors, (10094), 49 states have internal predecessors, (10094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:13,414 INFO L175 Difference]: Start difference. First operand has 911 places, 2428 transitions, 68207 flow. Second operand 48 states and 2744 transitions. [2023-01-28 03:53:13,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 958 places, 2578 transitions, 77702 flow [2023-01-28 03:53:27,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 934 places, 2578 transitions, 74922 flow, removed 1234 selfloop flow, removed 24 redundant places. [2023-01-28 03:53:27,771 INFO L231 Difference]: Finished difference. Result has 944 places, 2486 transitions, 70242 flow [2023-01-28 03:53:27,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=65427, PETRI_DIFFERENCE_MINUEND_PLACES=887, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=70242, PETRI_PLACES=944, PETRI_TRANSITIONS=2486} [2023-01-28 03:53:27,773 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 923 predicate places. [2023-01-28 03:53:27,773 INFO L495 AbstractCegarLoop]: Abstraction has has 944 places, 2486 transitions, 70242 flow [2023-01-28 03:53:27,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:27,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:53:27,774 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:53:27,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-01-28 03:53:27,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-01-28 03:53:27,980 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:53:27,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:53:27,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1236504761, now seen corresponding path program 65 times [2023-01-28 03:53:27,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:53:27,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330533443] [2023-01-28 03:53:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:53:27,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:53:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:53:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:53:28,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:53:28,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330533443] [2023-01-28 03:53:28,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330533443] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:53:28,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693981584] [2023-01-28 03:53:28,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:53:28,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:53:28,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:53:28,754 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:53:28,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-01-28 03:53:28,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 03:53:28,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:53:28,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 03:53:28,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:53:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:53:29,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:53:29,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:53:29,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 03:53:29,538 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 03:53:29,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 03:53:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:53:29,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693981584] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:53:29,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:53:29,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-28 03:53:29,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287763116] [2023-01-28 03:53:29,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:53:29,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 03:53:29,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:53:29,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 03:53:29,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 03:53:29,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:53:29,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 944 places, 2486 transitions, 70242 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:29,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:53:29,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:53:29,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:53:42,891 INFO L130 PetriNetUnfolder]: 6780/12927 cut-off events. [2023-01-28 03:53:42,891 INFO L131 PetriNetUnfolder]: For 1208952/1208952 co-relation queries the response was YES. [2023-01-28 03:53:43,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188530 conditions, 12927 events. 6780/12927 cut-off events. For 1208952/1208952 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 112069 event pairs, 1175 based on Foata normal form. 6/12933 useless extension candidates. Maximal degree in co-relation 188197. Up to 11956 conditions per place. [2023-01-28 03:53:43,122 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 2319 selfloop transitions, 338 changer transitions 3/2660 dead transitions. [2023-01-28 03:53:43,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 976 places, 2660 transitions, 83374 flow [2023-01-28 03:53:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 03:53:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 03:53:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1917 transitions. [2023-01-28 03:53:43,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2819947043248014 [2023-01-28 03:53:43,124 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1917 transitions. [2023-01-28 03:53:43,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1917 transitions. [2023-01-28 03:53:43,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:53:43,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1917 transitions. [2023-01-28 03:53:43,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.09090909090909) internal successors, (1917), 33 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:43,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:43,129 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:43,129 INFO L175 Difference]: Start difference. First operand has 944 places, 2486 transitions, 70242 flow. Second operand 33 states and 1917 transitions. [2023-01-28 03:53:43,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 976 places, 2660 transitions, 83374 flow [2023-01-28 03:53:58,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 947 places, 2660 transitions, 80600 flow, removed 1147 selfloop flow, removed 29 redundant places. [2023-01-28 03:53:58,721 INFO L231 Difference]: Finished difference. Result has 954 places, 2553 transitions, 73446 flow [2023-01-28 03:53:58,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=67600, PETRI_DIFFERENCE_MINUEND_PLACES=915, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=73446, PETRI_PLACES=954, PETRI_TRANSITIONS=2553} [2023-01-28 03:53:58,723 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 933 predicate places. [2023-01-28 03:53:58,723 INFO L495 AbstractCegarLoop]: Abstraction has has 954 places, 2553 transitions, 73446 flow [2023-01-28 03:53:58,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:58,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:53:58,723 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:53:58,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-01-28 03:53:58,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-01-28 03:53:58,924 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:53:58,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:53:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1331496917, now seen corresponding path program 66 times [2023-01-28 03:53:58,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:53:58,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773549447] [2023-01-28 03:53:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:53:58,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:53:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:53:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:53:59,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:53:59,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773549447] [2023-01-28 03:53:59,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773549447] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:53:59,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490624122] [2023-01-28 03:53:59,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:53:59,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:53:59,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:53:59,634 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:53:59,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-01-28 03:53:59,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 03:53:59,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:53:59,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 03:53:59,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:54:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:54:00,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:54:00,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:54:00,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 03:54:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:54:00,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490624122] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:54:00,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:54:00,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-01-28 03:54:00,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937724249] [2023-01-28 03:54:00,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:54:00,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 03:54:00,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:54:00,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 03:54:00,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 03:54:00,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:54:00,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 954 places, 2553 transitions, 73446 flow. Second operand has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:00,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:54:00,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:54:00,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:54:14,494 INFO L130 PetriNetUnfolder]: 6991/13329 cut-off events. [2023-01-28 03:54:14,494 INFO L131 PetriNetUnfolder]: For 1263247/1263247 co-relation queries the response was YES. [2023-01-28 03:54:14,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195340 conditions, 13329 events. 6991/13329 cut-off events. For 1263247/1263247 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 115771 event pairs, 1093 based on Foata normal form. 6/13335 useless extension candidates. Maximal degree in co-relation 195000. Up to 12522 conditions per place. [2023-01-28 03:54:14,743 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 2365 selfloop transitions, 360 changer transitions 4/2729 dead transitions. [2023-01-28 03:54:14,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 984 places, 2729 transitions, 85939 flow [2023-01-28 03:54:14,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 03:54:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 03:54:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1775 transitions. [2023-01-28 03:54:14,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.277951769495772 [2023-01-28 03:54:14,745 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1775 transitions. [2023-01-28 03:54:14,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1775 transitions. [2023-01-28 03:54:14,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:54:14,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1775 transitions. [2023-01-28 03:54:14,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.25806451612903) internal successors, (1775), 31 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:14,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:14,749 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:14,749 INFO L175 Difference]: Start difference. First operand has 954 places, 2553 transitions, 73446 flow. Second operand 31 states and 1775 transitions. [2023-01-28 03:54:14,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 984 places, 2729 transitions, 85939 flow [2023-01-28 03:54:31,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 966 places, 2729 transitions, 83029 flow, removed 1355 selfloop flow, removed 18 redundant places. [2023-01-28 03:54:31,281 INFO L231 Difference]: Finished difference. Result has 972 places, 2656 transitions, 77135 flow [2023-01-28 03:54:31,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=70549, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=77135, PETRI_PLACES=972, PETRI_TRANSITIONS=2656} [2023-01-28 03:54:31,283 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 951 predicate places. [2023-01-28 03:54:31,283 INFO L495 AbstractCegarLoop]: Abstraction has has 972 places, 2656 transitions, 77135 flow [2023-01-28 03:54:31,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:31,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:54:31,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:54:31,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-01-28 03:54:31,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2023-01-28 03:54:31,490 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:54:31,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:54:31,490 INFO L85 PathProgramCache]: Analyzing trace with hash -747601155, now seen corresponding path program 67 times [2023-01-28 03:54:31,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:54:31,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964657217] [2023-01-28 03:54:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:54:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:54:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:54:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:54:32,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:54:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964657217] [2023-01-28 03:54:32,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964657217] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:54:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569125103] [2023-01-28 03:54:32,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:54:32,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:54:32,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:54:32,309 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:54:32,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-01-28 03:54:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:54:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-01-28 03:54:32,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:54:32,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:54:32,628 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 [2023-01-28 03:54:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:54:32,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:54:33,035 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 8)) (.cse4 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset .cse6)) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_2525 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2525) c_~A~0.base))) (<= (+ (select .cse0 .cse1) (select .cse0 .cse2) c_~counter~0) (+ (select .cse0 .cse3) (select .cse0 .cse4) (select .cse0 c_~A~0.offset))))) (forall ((v_ArrVal_2525 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2525) c_~A~0.base))) (< (+ (select .cse5 .cse3) (select .cse5 .cse4) (select .cse5 c_~A~0.offset)) (+ (select .cse5 .cse1) (select .cse5 .cse2) c_~counter~0 1))))))) is different from false [2023-01-28 03:54:33,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:54:33,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 132 [2023-01-28 03:54:33,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:54:33,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-01-28 03:54:33,345 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:54:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:54:33,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569125103] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:54:33,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:54:33,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-01-28 03:54:33,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474034688] [2023-01-28 03:54:33,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:54:33,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 03:54:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:54:33,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 03:54:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1264, Unknown=1, NotChecked=72, Total=1482 [2023-01-28 03:54:33,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:54:33,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 972 places, 2656 transitions, 77135 flow. Second operand has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:33,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:54:33,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:54:33,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:54:48,135 INFO L130 PetriNetUnfolder]: 7105/13552 cut-off events. [2023-01-28 03:54:48,135 INFO L131 PetriNetUnfolder]: For 1266103/1266103 co-relation queries the response was YES. [2023-01-28 03:54:48,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197767 conditions, 13552 events. 7105/13552 cut-off events. For 1266103/1266103 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 118545 event pairs, 1166 based on Foata normal form. 3/13555 useless extension candidates. Maximal degree in co-relation 197420. Up to 12258 conditions per place. [2023-01-28 03:54:48,527 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 2202 selfloop transitions, 554 changer transitions 2/2758 dead transitions. [2023-01-28 03:54:48,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1001 places, 2758 transitions, 86096 flow [2023-01-28 03:54:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 03:54:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 03:54:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1716 transitions. [2023-01-28 03:54:48,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27766990291262134 [2023-01-28 03:54:48,529 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1716 transitions. [2023-01-28 03:54:48,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1716 transitions. [2023-01-28 03:54:48,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:54:48,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1716 transitions. [2023-01-28 03:54:48,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.2) internal successors, (1716), 30 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:48,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:48,535 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:48,535 INFO L175 Difference]: Start difference. First operand has 972 places, 2656 transitions, 77135 flow. Second operand 30 states and 1716 transitions. [2023-01-28 03:54:48,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1001 places, 2758 transitions, 86096 flow [2023-01-28 03:55:06,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 987 places, 2758 transitions, 83901 flow, removed 1013 selfloop flow, removed 14 redundant places. [2023-01-28 03:55:06,994 INFO L231 Difference]: Finished difference. Result has 991 places, 2700 transitions, 78504 flow [2023-01-28 03:55:06,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=74940, PETRI_DIFFERENCE_MINUEND_PLACES=958, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=519, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=78504, PETRI_PLACES=991, PETRI_TRANSITIONS=2700} [2023-01-28 03:55:06,997 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 970 predicate places. [2023-01-28 03:55:06,997 INFO L495 AbstractCegarLoop]: Abstraction has has 991 places, 2700 transitions, 78504 flow [2023-01-28 03:55:06,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:55:06,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:55:06,997 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:55:07,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-01-28 03:55:07,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:55:07,203 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:55:07,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:55:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1929892953, now seen corresponding path program 68 times [2023-01-28 03:55:07,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:55:07,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260651182] [2023-01-28 03:55:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:55:07,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:55:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:55:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:55:07,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:55:07,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260651182] [2023-01-28 03:55:07,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260651182] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:55:07,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939224428] [2023-01-28 03:55:07,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:55:07,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:55:07,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:55:07,940 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:55:07,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-01-28 03:55:08,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:55:08,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:55:08,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 03:55:08,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:55:08,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:55:08,484 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 15 treesize of output 14 [2023-01-28 03:55:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:55:08,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:55:09,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:55:09,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 109 [2023-01-28 03:55:09,698 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-01-28 03:55:09,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 66 [2023-01-28 03:55:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:55:10,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939224428] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:55:10,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:55:10,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-01-28 03:55:10,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694699874] [2023-01-28 03:55:10,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:55:10,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 03:55:10,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:55:10,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 03:55:10,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2023-01-28 03:55:10,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:55:10,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 991 places, 2700 transitions, 78504 flow. Second operand has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:55:10,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:55:10,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:55:10,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:55:26,118 INFO L130 PetriNetUnfolder]: 7179/13725 cut-off events. [2023-01-28 03:55:26,118 INFO L131 PetriNetUnfolder]: For 1244861/1244861 co-relation queries the response was YES. [2023-01-28 03:55:26,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199271 conditions, 13725 events. 7179/13725 cut-off events. For 1244861/1244861 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 120550 event pairs, 1308 based on Foata normal form. 4/13729 useless extension candidates. Maximal degree in co-relation 198920. Up to 13085 conditions per place. [2023-01-28 03:55:26,516 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2492 selfloop transitions, 295 changer transitions 6/2793 dead transitions. [2023-01-28 03:55:26,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1029 places, 2793 transitions, 86033 flow [2023-01-28 03:55:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 03:55:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 03:55:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2216 transitions. [2023-01-28 03:55:26,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2758277321384118 [2023-01-28 03:55:26,519 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2216 transitions. [2023-01-28 03:55:26,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2216 transitions. [2023-01-28 03:55:26,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:55:26,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2216 transitions. [2023-01-28 03:55:26,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.82051282051282) internal successors, (2216), 39 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:55:26,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:55:26,527 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:55:26,527 INFO L175 Difference]: Start difference. First operand has 991 places, 2700 transitions, 78504 flow. Second operand 39 states and 2216 transitions. [2023-01-28 03:55:26,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1029 places, 2793 transitions, 86033 flow [2023-01-28 03:55:44,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1007 places, 2793 transitions, 83672 flow, removed 985 selfloop flow, removed 22 redundant places. [2023-01-28 03:55:44,123 INFO L231 Difference]: Finished difference. Result has 1011 places, 2730 transitions, 77871 flow [2023-01-28 03:55:44,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=76143, PETRI_DIFFERENCE_MINUEND_PLACES=969, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=77871, PETRI_PLACES=1011, PETRI_TRANSITIONS=2730} [2023-01-28 03:55:44,125 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 990 predicate places. [2023-01-28 03:55:44,125 INFO L495 AbstractCegarLoop]: Abstraction has has 1011 places, 2730 transitions, 77871 flow [2023-01-28 03:55:44,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:55:44,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:55:44,126 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:55:44,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-01-28 03:55:44,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:55:44,326 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:55:44,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:55:44,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1311876257, now seen corresponding path program 69 times [2023-01-28 03:55:44,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:55:44,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864472459] [2023-01-28 03:55:44,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:55:44,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:55:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:55:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:55:44,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:55:44,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864472459] [2023-01-28 03:55:44,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864472459] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:55:44,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992753815] [2023-01-28 03:55:44,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:55:44,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:55:44,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:55:44,882 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:55:44,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-01-28 03:55:45,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 03:55:45,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:55:45,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-01-28 03:55:45,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:55:45,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 03:55:45,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:55:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:55:45,443 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 [2023-01-28 03:55:45,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:55:45,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 51 [2023-01-28 03:55:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:55:45,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:55:48,805 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_2605 (Array Int Int)) (v_subst_39 Int)) (or (forall ((v_subst_41 Int)) (or (<= c_~N~0 v_subst_41) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2605) c_~A~0.base))) (< (let ((.cse1 (* v_subst_39 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 4)) (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset .cse1)))) (+ (select .cse0 (+ c_~A~0.offset (* v_subst_41 4))) c_~counter~0 (select .cse0 .cse2) 1))) (< (+ v_subst_41 1) c_~N~0))) (< (+ 2 v_subst_39) c_~N~0) (<= c_~N~0 (+ v_subst_39 1)))) (forall ((v_ArrVal_2605 (Array Int Int)) (v_subst_40 Int)) (or (< (+ 2 v_subst_40) c_~N~0) (<= c_~N~0 (+ v_subst_40 1)) (forall ((v_subst_42 Int)) (or (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2605) c_~A~0.base))) (<= (+ (select .cse3 (+ c_~A~0.offset (* v_subst_42 4))) c_~counter~0 (select .cse3 .cse2)) (let ((.cse4 (* v_subst_40 4))) (+ (select .cse3 (+ c_~A~0.offset .cse4)) (select .cse3 c_~A~0.offset) (select .cse3 (+ c_~A~0.offset .cse4 4)))))) (< (+ v_subst_42 1) c_~N~0) (<= c_~N~0 v_subst_42))))))) is different from false [2023-01-28 03:55:50,855 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_2605 (Array Int Int)) (v_subst_40 Int)) (or (< (+ 2 v_subst_40) c_~N~0) (<= c_~N~0 (+ v_subst_40 1)) (forall ((v_subst_42 Int)) (or (< (+ v_subst_42 1) c_~N~0) (<= c_~N~0 v_subst_42) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2605) c_~A~0.base))) (<= (+ .cse0 (select .cse1 (+ c_~A~0.offset (* v_subst_42 4))) c_~counter~0 (select .cse1 .cse2)) (let ((.cse3 (* v_subst_40 4))) (+ (select .cse1 (+ c_~A~0.offset .cse3)) (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset .cse3 4)))))))))) (forall ((v_ArrVal_2605 (Array Int Int)) (v_subst_39 Int)) (or (forall ((v_subst_41 Int)) (or (<= c_~N~0 v_subst_41) (< (+ v_subst_41 1) c_~N~0) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2605) c_~A~0.base))) (< (let ((.cse5 (* v_subst_39 4))) (+ (select .cse4 (+ c_~A~0.offset .cse5 4)) (select .cse4 c_~A~0.offset) (select .cse4 (+ c_~A~0.offset .cse5)))) (+ (select .cse4 (+ c_~A~0.offset (* v_subst_41 4))) .cse0 c_~counter~0 (select .cse4 .cse2) 1))))) (< (+ 2 v_subst_39) c_~N~0) (<= c_~N~0 (+ v_subst_39 1))))))) is different from false [2023-01-28 03:55:52,910 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2605 (Array Int Int)) (v_subst_40 Int)) (or (< (+ 2 v_subst_40) c_~N~0) (<= c_~N~0 (+ v_subst_40 1)) (forall ((v_subst_42 Int)) (or (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2605) c_~A~0.base))) (<= (+ .cse0 (select .cse1 (+ c_~A~0.offset (* v_subst_42 4))) c_~counter~0 (select .cse1 .cse2)) (let ((.cse3 (* v_subst_40 4))) (+ (select .cse1 (+ c_~A~0.offset .cse3)) (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset .cse3 4)))))) (< (+ v_subst_42 1) c_~N~0) (<= c_~N~0 v_subst_42))))) (forall ((v_ArrVal_2605 (Array Int Int)) (v_subst_39 Int)) (or (< (+ 2 v_subst_39) c_~N~0) (forall ((v_subst_41 Int)) (or (<= c_~N~0 v_subst_41) (< (+ v_subst_41 1) c_~N~0) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2605) c_~A~0.base))) (< (let ((.cse5 (* v_subst_39 4))) (+ (select .cse4 (+ c_~A~0.offset .cse5 4)) (select .cse4 c_~A~0.offset) (select .cse4 (+ c_~A~0.offset .cse5)))) (+ .cse0 (select .cse4 (+ c_~A~0.offset (* v_subst_41 4))) c_~counter~0 (select .cse4 .cse2) 1))))) (<= c_~N~0 (+ v_subst_39 1)))))) is different from false [2023-01-28 03:55:59,145 WARN L222 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 03:55:59,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:55:59,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 96 [2023-01-28 03:55:59,231 INFO L321 Elim1Store]: treesize reduction 32, result has 53.6 percent of original size [2023-01-28 03:55:59,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 386 treesize of output 344 [2023-01-28 03:55:59,279 INFO L321 Elim1Store]: treesize reduction 32, result has 53.6 percent of original size [2023-01-28 03:55:59,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 142 treesize of output 128 [2023-01-28 03:55:59,329 INFO L321 Elim1Store]: treesize reduction 30, result has 56.5 percent of original size [2023-01-28 03:55:59,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 71 [2023-01-28 03:55:59,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:55:59,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 95 [2023-01-28 03:55:59,497 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:55:59,518 INFO L321 Elim1Store]: treesize reduction 60, result has 13.0 percent of original size [2023-01-28 03:55:59,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 186 treesize of output 124 [2023-01-28 03:55:59,535 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-01-28 03:55:59,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 21 [2023-01-28 03:55:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-01-28 03:55:59,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992753815] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:55:59,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:55:59,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 43 [2023-01-28 03:55:59,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237436637] [2023-01-28 03:55:59,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:55:59,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 03:55:59,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:55:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 03:55:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1528, Unknown=3, NotChecked=246, Total=1980 [2023-01-28 03:55:59,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:55:59,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1011 places, 2730 transitions, 77871 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:55:59,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:55:59,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:55:59,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:56:20,548 INFO L130 PetriNetUnfolder]: 7447/14261 cut-off events. [2023-01-28 03:56:20,548 INFO L131 PetriNetUnfolder]: For 1358496/1358496 co-relation queries the response was YES. [2023-01-28 03:56:20,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209313 conditions, 14261 events. 7447/14261 cut-off events. For 1358496/1358496 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 126543 event pairs, 408 based on Foata normal form. 5/14266 useless extension candidates. Maximal degree in co-relation 208960. Up to 8356 conditions per place. [2023-01-28 03:56:20,822 INFO L137 encePairwiseOnDemand]: 193/206 looper letters, 1888 selfloop transitions, 1064 changer transitions 48/3000 dead transitions. [2023-01-28 03:56:20,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 3000 transitions, 92224 flow [2023-01-28 03:56:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-28 03:56:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-28 03:56:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2823 transitions. [2023-01-28 03:56:20,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27967109173766597 [2023-01-28 03:56:20,824 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2823 transitions. [2023-01-28 03:56:20,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2823 transitions. [2023-01-28 03:56:20,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:56:20,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2823 transitions. [2023-01-28 03:56:20,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 57.61224489795919) internal successors, (2823), 49 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:56:20,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:56:20,831 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:56:20,831 INFO L175 Difference]: Start difference. First operand has 1011 places, 2730 transitions, 77871 flow. Second operand 49 states and 2823 transitions. [2023-01-28 03:56:20,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 3000 transitions, 92224 flow [2023-01-28 03:56:39,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1032 places, 3000 transitions, 91723 flow, removed 141 selfloop flow, removed 27 redundant places. [2023-01-28 03:56:39,993 INFO L231 Difference]: Finished difference. Result has 1040 places, 2828 transitions, 85500 flow [2023-01-28 03:56:39,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=77373, PETRI_DIFFERENCE_MINUEND_PLACES=984, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=978, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=85500, PETRI_PLACES=1040, PETRI_TRANSITIONS=2828} [2023-01-28 03:56:39,995 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1019 predicate places. [2023-01-28 03:56:39,995 INFO L495 AbstractCegarLoop]: Abstraction has has 1040 places, 2828 transitions, 85500 flow [2023-01-28 03:56:39,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:56:39,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:56:39,996 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:56:40,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-01-28 03:56:40,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:56:40,196 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:56:40,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:56:40,196 INFO L85 PathProgramCache]: Analyzing trace with hash 715396595, now seen corresponding path program 70 times [2023-01-28 03:56:40,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:56:40,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404898738] [2023-01-28 03:56:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:56:40,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:56:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:56:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:56:40,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:56:40,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404898738] [2023-01-28 03:56:40,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404898738] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:56:40,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916940720] [2023-01-28 03:56:40,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:56:40,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:56:40,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:56:40,957 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:56:40,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-01-28 03:56:41,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:56:41,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:56:41,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-01-28 03:56:41,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:56:41,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:56:41,346 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 [2023-01-28 03:56:41,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:56:41,555 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 15 treesize of output 14 [2023-01-28 03:56:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:56:41,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:56:42,149 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset .cse5 4)) (.cse2 (+ c_~A~0.offset .cse5))) (and (forall ((v_ArrVal_2644 (Array Int Int)) (v_subst_43 Int)) (or (< (+ v_subst_43 1) c_~N~0) (<= c_~N~0 v_subst_43) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2644) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0 (select .cse0 .cse2)) (+ (select .cse0 (+ c_~A~0.offset (* v_subst_43 4))) (select .cse0 .cse3) (select .cse0 c_~A~0.offset)))))) (forall ((v_ArrVal_2644 (Array Int Int)) (v_subst_44 Int)) (or (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2644) c_~A~0.base))) (< (+ (select .cse4 (+ c_~A~0.offset (* v_subst_44 4))) (select .cse4 .cse3) (select .cse4 c_~A~0.offset)) (+ (select .cse4 .cse1) c_~counter~0 (select .cse4 .cse2) 1))) (< (+ v_subst_44 1) c_~N~0) (<= c_~N~0 v_subst_44)))))) is different from false [2023-01-28 03:56:42,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:56:42,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 154 [2023-01-28 03:56:42,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:56:42,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 89 [2023-01-28 03:56:42,952 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:56:43,005 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-01-28 03:56:43,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 66 [2023-01-28 03:56:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:56:43,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916940720] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:56:43,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:56:43,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 03:56:43,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629638473] [2023-01-28 03:56:43,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:56:43,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 03:56:43,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:56:43,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 03:56:43,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1689, Unknown=1, NotChecked=84, Total=1980 [2023-01-28 03:56:43,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:56:43,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1040 places, 2828 transitions, 85500 flow. Second operand has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:56:43,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:56:43,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:56:43,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:57:01,173 INFO L130 PetriNetUnfolder]: 7526/14406 cut-off events. [2023-01-28 03:57:01,173 INFO L131 PetriNetUnfolder]: For 1480811/1480811 co-relation queries the response was YES. [2023-01-28 03:57:01,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220444 conditions, 14406 events. 7526/14406 cut-off events. For 1480811/1480811 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 127562 event pairs, 1143 based on Foata normal form. 4/14410 useless extension candidates. Maximal degree in co-relation 220083. Up to 13130 conditions per place. [2023-01-28 03:57:01,451 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 2376 selfloop transitions, 551 changer transitions 5/2932 dead transitions. [2023-01-28 03:57:01,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1078 places, 2932 transitions, 94281 flow [2023-01-28 03:57:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 03:57:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 03:57:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2300 transitions. [2023-01-28 03:57:01,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.279126213592233 [2023-01-28 03:57:01,453 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2300 transitions. [2023-01-28 03:57:01,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2300 transitions. [2023-01-28 03:57:01,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:57:01,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2300 transitions. [2023-01-28 03:57:01,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.5) internal successors, (2300), 40 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:01,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:01,460 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:01,460 INFO L175 Difference]: Start difference. First operand has 1040 places, 2828 transitions, 85500 flow. Second operand 40 states and 2300 transitions. [2023-01-28 03:57:01,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1078 places, 2932 transitions, 94281 flow [2023-01-28 03:57:24,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1052 places, 2932 transitions, 91401 flow, removed 1250 selfloop flow, removed 26 redundant places. [2023-01-28 03:57:24,818 INFO L231 Difference]: Finished difference. Result has 1057 places, 2852 transitions, 85632 flow [2023-01-28 03:57:24,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=82720, PETRI_DIFFERENCE_MINUEND_PLACES=1013, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=533, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=85632, PETRI_PLACES=1057, PETRI_TRANSITIONS=2852} [2023-01-28 03:57:24,820 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1036 predicate places. [2023-01-28 03:57:24,820 INFO L495 AbstractCegarLoop]: Abstraction has has 1057 places, 2852 transitions, 85632 flow [2023-01-28 03:57:24,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:24,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:57:24,821 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:57:24,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-01-28 03:57:25,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-01-28 03:57:25,025 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:57:25,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:57:25,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2016469053, now seen corresponding path program 71 times [2023-01-28 03:57:25,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:57:25,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010643673] [2023-01-28 03:57:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:57:25,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:57:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:57:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:57:25,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:57:25,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010643673] [2023-01-28 03:57:25,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010643673] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:57:25,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643639986] [2023-01-28 03:57:25,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:57:25,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:57:25,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:57:25,593 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:57:25,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-01-28 03:57:25,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 03:57:25,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:57:25,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 114 conjunts are in the unsatisfiable core [2023-01-28 03:57:25,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:57:25,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 03:57:25,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:57:25,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 03:57:26,047 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:57:26,048 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:57:26,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:57:26,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2023-01-28 03:57:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:57:26,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:57:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:57:26,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643639986] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:57:26,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:57:26,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 8] total 28 [2023-01-28 03:57:26,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476725726] [2023-01-28 03:57:26,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:57:26,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 03:57:26,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:57:26,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 03:57:26,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-01-28 03:57:26,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 03:57:26,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1057 places, 2852 transitions, 85632 flow. Second operand has 30 states, 30 states have (on average 61.6) internal successors, (1848), 30 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:26,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:57:26,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 03:57:26,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:57:42,738 INFO L130 PetriNetUnfolder]: 7694/14754 cut-off events. [2023-01-28 03:57:42,738 INFO L131 PetriNetUnfolder]: For 1583190/1583190 co-relation queries the response was YES. [2023-01-28 03:57:42,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229108 conditions, 14754 events. 7694/14754 cut-off events. For 1583190/1583190 co-relation queries the response was YES. Maximal size of possible extension queue 1157. Compared 131181 event pairs, 1416 based on Foata normal form. 6/14760 useless extension candidates. Maximal degree in co-relation 228747. Up to 14115 conditions per place. [2023-01-28 03:57:43,025 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 2792 selfloop transitions, 172 changer transitions 3/2967 dead transitions. [2023-01-28 03:57:43,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1079 places, 2967 transitions, 97951 flow [2023-01-28 03:57:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 03:57:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 03:57:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1506 transitions. [2023-01-28 03:57:43,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31785563528915156 [2023-01-28 03:57:43,027 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1506 transitions. [2023-01-28 03:57:43,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1506 transitions. [2023-01-28 03:57:43,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:57:43,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1506 transitions. [2023-01-28 03:57:43,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 65.47826086956522) internal successors, (1506), 23 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:43,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 206.0) internal successors, (4944), 24 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:43,031 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 206.0) internal successors, (4944), 24 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:43,032 INFO L175 Difference]: Start difference. First operand has 1057 places, 2852 transitions, 85632 flow. Second operand 23 states and 1506 transitions. [2023-01-28 03:57:43,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1079 places, 2967 transitions, 97951 flow [2023-01-28 03:58:06,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1052 places, 2967 transitions, 96442 flow, removed 518 selfloop flow, removed 27 redundant places. [2023-01-28 03:58:06,494 INFO L231 Difference]: Finished difference. Result has 1058 places, 2894 transitions, 88714 flow [2023-01-28 03:58:06,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=84123, PETRI_DIFFERENCE_MINUEND_PLACES=1030, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=88714, PETRI_PLACES=1058, PETRI_TRANSITIONS=2894} [2023-01-28 03:58:06,497 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1037 predicate places. [2023-01-28 03:58:06,497 INFO L495 AbstractCegarLoop]: Abstraction has has 1058 places, 2894 transitions, 88714 flow [2023-01-28 03:58:06,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 61.6) internal successors, (1848), 30 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:06,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:58:06,497 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:58:06,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-01-28 03:58:06,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:58:06,698 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:58:06,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:58:06,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1868066389, now seen corresponding path program 72 times [2023-01-28 03:58:06,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:58:06,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756841740] [2023-01-28 03:58:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:58:06,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:58:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:58:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:58:07,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:58:07,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756841740] [2023-01-28 03:58:07,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756841740] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:58:07,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500426482] [2023-01-28 03:58:07,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:58:07,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:58:07,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:58:07,479 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:58:07,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-01-28 03:58:07,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 03:58:07,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:58:07,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 03:58:07,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:58:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:58:07,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:58:08,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:58:08,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 03:58:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:58:08,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500426482] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:58:08,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:58:08,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-01-28 03:58:08,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676052654] [2023-01-28 03:58:08,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:58:08,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 03:58:08,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:58:08,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 03:58:08,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 03:58:08,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 03:58:08,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1058 places, 2894 transitions, 88714 flow. Second operand has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:08,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:58:08,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 03:58:08,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 03:58:19,508 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 03:58:19,518 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 03:58:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 03:58:19,634 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 03:58:19,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-01-28 03:58:19,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:58:19,837 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (33states, 53/206 universal loopers) in iteration 77,while PetriNetUnfolder was constructing finite prefix that currently has 155890 conditions, 10017 events (5723/10016 cut-off events. For 999202/999202 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 84496 event pairs, 775 based on Foata normal form. 0/11036 useless extension candidates. Maximal degree in co-relation 155548. Up to 9527 conditions per place.). [2023-01-28 03:58:19,838 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 03:58:19,838 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 03:58:19,838 INFO L445 BasicCegarLoop]: Path program histogram: [72, 1, 1, 1, 1, 1] [2023-01-28 03:58:19,840 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 03:58:19,840 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 03:58:19,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 03:58:19 BasicIcfg [2023-01-28 03:58:19,842 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 03:58:19,842 INFO L158 Benchmark]: Toolchain (without parser) took 778771.32ms. Allocated memory was 343.9MB in the beginning and 8.9GB in the end (delta: 8.5GB). Free memory was 304.9MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-01-28 03:58:19,842 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 214.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 03:58:19,842 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.85ms. Allocated memory is still 343.9MB. Free memory was 304.9MB in the beginning and 293.4MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 03:58:19,842 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.41ms. Allocated memory is still 343.9MB. Free memory was 293.4MB in the beginning and 291.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 03:58:19,843 INFO L158 Benchmark]: Boogie Preprocessor took 47.65ms. Allocated memory is still 343.9MB. Free memory was 291.4MB in the beginning and 289.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 03:58:19,843 INFO L158 Benchmark]: RCFGBuilder took 546.42ms. Allocated memory is still 343.9MB. Free memory was 289.7MB in the beginning and 264.0MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-01-28 03:58:19,843 INFO L158 Benchmark]: TraceAbstraction took 777826.56ms. Allocated memory was 343.9MB in the beginning and 8.9GB in the end (delta: 8.5GB). Free memory was 263.4MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-01-28 03:58:19,844 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 214.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 291.85ms. Allocated memory is still 343.9MB. Free memory was 304.9MB in the beginning and 293.4MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 50.41ms. Allocated memory is still 343.9MB. Free memory was 293.4MB in the beginning and 291.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 47.65ms. Allocated memory is still 343.9MB. Free memory was 291.4MB in the beginning and 289.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 546.42ms. Allocated memory is still 343.9MB. Free memory was 289.7MB in the beginning and 264.0MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 777826.56ms. Allocated memory was 343.9MB in the beginning and 8.9GB in the end (delta: 8.5GB). Free memory was 263.4MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 97 PlacesBefore, 21 PlacesAfterwards, 99 TransitionsBefore, 17 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 7 FixpointIterations, 56 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 97 TotalNumberOfCompositions, 585 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 553, independent: 544, independent conditional: 0, independent unconditional: 544, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 264, independent: 259, independent conditional: 0, independent unconditional: 259, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 553, independent: 285, independent conditional: 0, independent unconditional: 285, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 264, unknown conditional: 0, unknown unconditional: 264] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (33states, 53/206 universal loopers) in iteration 77,while PetriNetUnfolder was constructing finite prefix that currently has 155890 conditions, 10017 events (5723/10016 cut-off events. For 999202/999202 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 84496 event pairs, 775 based on Foata normal form. 0/11036 useless extension candidates. Maximal degree in co-relation 155548. Up to 9527 conditions per place.). - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (33states, 53/206 universal loopers) in iteration 77,while PetriNetUnfolder was constructing finite prefix that currently has 155890 conditions, 10017 events (5723/10016 cut-off events. For 999202/999202 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 84496 event pairs, 775 based on Foata normal form. 0/11036 useless extension candidates. Maximal degree in co-relation 155548. Up to 9527 conditions per place.). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (33states, 53/206 universal loopers) in iteration 77,while PetriNetUnfolder was constructing finite prefix that currently has 155890 conditions, 10017 events (5723/10016 cut-off events. For 999202/999202 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 84496 event pairs, 775 based on Foata normal form. 0/11036 useless extension candidates. Maximal degree in co-relation 155548. Up to 9527 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 121 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 777.7s, OverallIterations: 77, TraceHistogramMax: 3, PathProgramHistogramMax: 72, EmptinessCheckTime: 0.0s, AutomataDifference: 622.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 17 mSolverCounterUnknown, 8633 SdHoareTripleChecker+Valid, 38.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8633 mSDsluCounter, 2779 SdHoareTripleChecker+Invalid, 33.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3566 IncrementalHoareTripleChecker+Unchecked, 2495 mSDsCounter, 1837 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 65999 IncrementalHoareTripleChecker+Invalid, 71419 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1837 mSolverCounterUnsat, 284 mSDtfsCounter, 65999 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5068 GetRequests, 1645 SyntacticMatches, 218 SemanticMatches, 3205 ConstructedPredicates, 23 IntricatePredicates, 3 DeprecatedPredicates, 47954 ImplicationChecksByTransitivity, 146.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88714occurred in iteration=76, InterpolantAutomatonStates: 1813, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 4.1s SatisfiabilityAnalysisTime, 124.5s InterpolantComputationTime, 3184 NumberOfCodeBlocks, 3184 NumberOfCodeBlocksAsserted, 247 NumberOfCheckSat, 4529 ConstructedInterpolants, 194 QuantifiedInterpolants, 90579 SizeOfPredicates, 2324 NumberOfNonLiveVariables, 19722 ConjunctsInSsa, 5973 ConjunctsInUnsatCore, 225 InterpolantComputations, 5 PerfectInterpolantSequences, 464/2912 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown