/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 AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 11:42:03,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 11:42:03,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 11:42:03,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 11:42:03,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 11:42:03,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 11:42:03,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 11:42:03,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 11:42:03,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 11:42:03,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 11:42:03,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 11:42:03,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 11:42:03,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 11:42:03,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 11:42:03,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 11:42:03,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 11:42:03,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 11:42:03,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 11:42:03,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 11:42:03,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 11:42:03,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 11:42:03,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 11:42:03,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 11:42:03,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 11:42:03,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 11:42:03,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 11:42:03,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 11:42:03,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 11:42:03,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 11:42:03,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 11:42:03,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 11:42:03,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 11:42:03,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 11:42:03,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 11:42:03,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 11:42:03,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 11:42:03,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 11:42:03,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 11:42:03,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 11:42:03,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 11:42:03,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 11:42:03,693 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 11:42:03,709 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 11:42:03,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 11:42:03,709 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 11:42:03,709 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 11:42:03,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 11:42:03,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 11:42:03,710 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 11:42:03,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 11:42:03,710 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 11:42:03,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 11:42:03,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 11:42:03,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 11:42:03,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 11:42:03,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 11:42:03,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 11:42:03,711 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 11:42:03,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 11:42:03,711 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 11:42:03,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 11:42:03,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 11:42:03,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 11:42:03,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 11:42:03,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 11:42:03,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:42:03,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 11:42:03,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 11:42:03,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 11:42:03,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 11:42:03,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 11:42:03,712 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 11:42:03,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 11:42:03,712 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 11:42:03,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 11:42:03,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 11:42:03,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 11:42:03,931 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 11:42:03,933 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 11:42:03,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-01-28 11:42:04,951 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 11:42:05,055 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 11:42:05,055 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-01-28 11:42:05,059 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97b180684/69abc408477048349bcd5c5115b38bbb/FLAG435f5d3e9 [2023-01-28 11:42:05,068 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97b180684/69abc408477048349bcd5c5115b38bbb [2023-01-28 11:42:05,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 11:42:05,071 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 11:42:05,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 11:42:05,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 11:42:05,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 11:42:05,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3615a146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05, skipping insertion in model container [2023-01-28 11:42:05,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 11:42:05,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 11:42:05,196 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-simple-queue.wvr.c[2438,2451] [2023-01-28 11:42:05,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:42:05,207 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 11:42:05,218 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-simple-queue.wvr.c[2438,2451] [2023-01-28 11:42:05,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:42:05,225 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:42:05,225 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:42:05,229 INFO L208 MainTranslator]: Completed translation [2023-01-28 11:42:05,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05 WrapperNode [2023-01-28 11:42:05,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 11:42:05,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 11:42:05,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 11:42:05,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 11:42:05,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,253 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 133 [2023-01-28 11:42:05,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 11:42:05,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 11:42:05,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 11:42:05,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 11:42:05,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,272 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 11:42:05,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 11:42:05,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 11:42:05,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 11:42:05,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (1/1) ... [2023-01-28 11:42:05,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:42:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:05,299 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 11:42:05,302 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 11:42:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 11:42:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 11:42:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 11:42:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 11:42:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 11:42:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 11:42:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 11:42:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 11:42:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 11:42:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 11:42:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 11:42:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 11:42:05,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 11:42:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 11:42:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 11:42:05,324 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 11:42:05,387 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 11:42:05,388 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 11:42:05,535 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 11:42:05,623 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 11:42:05,623 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 11:42:05,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:42:05 BoogieIcfgContainer [2023-01-28 11:42:05,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 11:42:05,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 11:42:05,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 11:42:05,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 11:42:05,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 11:42:05" (1/3) ... [2023-01-28 11:42:05,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78236a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:42:05, skipping insertion in model container [2023-01-28 11:42:05,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:42:05" (2/3) ... [2023-01-28 11:42:05,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78236a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:42:05, skipping insertion in model container [2023-01-28 11:42:05,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:42:05" (3/3) ... [2023-01-28 11:42:05,640 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-01-28 11:42:05,653 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 11:42:05,653 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 11:42:05,653 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 11:42:05,732 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 11:42:05,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 246 flow [2023-01-28 11:42:05,802 INFO L130 PetriNetUnfolder]: 9/113 cut-off events. [2023-01-28 11:42:05,802 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:42:05,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 113 events. 9/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-28 11:42:05,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 115 transitions, 246 flow [2023-01-28 11:42:05,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2023-01-28 11:42:05,819 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 11:42:05,825 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 105 transitions, 222 flow [2023-01-28 11:42:05,827 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 105 transitions, 222 flow [2023-01-28 11:42:05,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 105 transitions, 222 flow [2023-01-28 11:42:05,846 INFO L130 PetriNetUnfolder]: 9/105 cut-off events. [2023-01-28 11:42:05,846 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:42:05,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 105 events. 9/105 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-28 11:42:05,847 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-01-28 11:42:08,626 INFO L134 LiptonReduction]: Checked pairs total: 467 [2023-01-28 11:42:08,626 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-01-28 11:42:08,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 11:42:08,641 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;@12179ab, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 11:42:08,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 11:42:08,646 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-28 11:42:08,646 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:42:08,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:08,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:08,647 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 11:42:08,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:08,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1505763338, now seen corresponding path program 1 times [2023-01-28 11:42:08,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:08,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76941570] [2023-01-28 11:42:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:08,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:08,925 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 11:42:08,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:08,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76941570] [2023-01-28 11:42:08,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76941570] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:42:08,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:42:08,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 11:42:08,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130329965] [2023-01-28 11:42:08,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:42:08,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 11:42:08,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 11:42:08,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 11:42:08,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 224 [2023-01-28 11:42:08,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:08,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:08,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 224 [2023-01-28 11:42:08,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:09,008 INFO L130 PetriNetUnfolder]: 38/71 cut-off events. [2023-01-28 11:42:09,008 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 11:42:09,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 71 events. 38/71 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 133 event pairs, 9 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 100. Up to 37 conditions per place. [2023-01-28 11:42:09,009 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 19 selfloop transitions, 2 changer transitions 2/23 dead transitions. [2023-01-28 11:42:09,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 110 flow [2023-01-28 11:42:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 11:42:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 11:42:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-01-28 11:42:09,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47767857142857145 [2023-01-28 11:42:09,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-01-28 11:42:09,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-01-28 11:42:09,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:09,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-01-28 11:42:09,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,031 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 321 transitions. [2023-01-28 11:42:09,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 110 flow [2023-01-28 11:42:09,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 11:42:09,034 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 46 flow [2023-01-28 11:42:09,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-01-28 11:42:09,038 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-01-28 11:42:09,038 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 46 flow [2023-01-28 11:42:09,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:09,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:09,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 11:42:09,039 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 11:42:09,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1116336325, now seen corresponding path program 1 times [2023-01-28 11:42:09,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:09,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103472729] [2023-01-28 11:42:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:09,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:09,152 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 11:42:09,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:09,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103472729] [2023-01-28 11:42:09,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103472729] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:42:09,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:42:09,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 11:42:09,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533825853] [2023-01-28 11:42:09,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:42:09,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 11:42:09,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:09,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 11:42:09,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 11:42:09,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 224 [2023-01-28 11:42:09,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:09,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 224 [2023-01-28 11:42:09,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:09,215 INFO L130 PetriNetUnfolder]: 52/102 cut-off events. [2023-01-28 11:42:09,216 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-01-28 11:42:09,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 102 events. 52/102 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 257 event pairs, 17 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 135. Up to 74 conditions per place. [2023-01-28 11:42:09,216 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 18 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2023-01-28 11:42:09,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 117 flow [2023-01-28 11:42:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 11:42:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 11:42:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-01-28 11:42:09,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2023-01-28 11:42:09,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-01-28 11:42:09,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-01-28 11:42:09,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:09,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-01-28 11:42:09,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,222 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 46 flow. Second operand 3 states and 310 transitions. [2023-01-28 11:42:09,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 117 flow [2023-01-28 11:42:09,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 11:42:09,223 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 56 flow [2023-01-28 11:42:09,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-01-28 11:42:09,224 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-01-28 11:42:09,224 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 56 flow [2023-01-28 11:42:09,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:09,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:09,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 11:42:09,225 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 11:42:09,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash -128502642, now seen corresponding path program 1 times [2023-01-28 11:42:09,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:09,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237564787] [2023-01-28 11:42:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:09,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:09,288 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 11:42:09,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:09,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237564787] [2023-01-28 11:42:09,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237564787] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:42:09,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:42:09,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 11:42:09,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195176546] [2023-01-28 11:42:09,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:42:09,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:42:09,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:09,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:42:09,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:42:09,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 224 [2023-01-28 11:42:09,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:09,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 224 [2023-01-28 11:42:09,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:09,336 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2023-01-28 11:42:09,336 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-01-28 11:42:09,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 130 events. 61/130 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 368 event pairs, 44 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 212. Up to 103 conditions per place. [2023-01-28 11:42:09,337 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-01-28 11:42:09,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 138 flow [2023-01-28 11:42:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:42:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:42:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2023-01-28 11:42:09,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42299107142857145 [2023-01-28 11:42:09,339 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2023-01-28 11:42:09,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2023-01-28 11:42:09,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:09,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2023-01-28 11:42:09,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,344 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,344 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 56 flow. Second operand 4 states and 379 transitions. [2023-01-28 11:42:09,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 138 flow [2023-01-28 11:42:09,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 11:42:09,346 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 68 flow [2023-01-28 11:42:09,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-01-28 11:42:09,346 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-01-28 11:42:09,349 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 68 flow [2023-01-28 11:42:09,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:09,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:09,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:09,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 11:42:09,350 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 11:42:09,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:09,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1064831031, now seen corresponding path program 1 times [2023-01-28 11:42:09,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:09,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545745545] [2023-01-28 11:42:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:09,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:09,753 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 11:42:09,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:09,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545745545] [2023-01-28 11:42:09,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545745545] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:09,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173805074] [2023-01-28 11:42:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:09,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:09,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:09,771 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 11:42:09,801 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 11:42:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:09,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 11:42:09,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:10,035 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 11:42:10,081 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 11:42:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:42:10,172 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 16 treesize of output 18 [2023-01-28 11:42:10,230 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 11:42:10,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:10,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:10,383 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 57 treesize of output 45 [2023-01-28 11:42:10,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:10,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 162 [2023-01-28 11:42:10,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:10,422 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 52 treesize of output 48 [2023-01-28 11:42:10,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-01-28 11:42:10,496 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 11:42:10,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173805074] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:10,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:10,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-01-28 11:42:10,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613550507] [2023-01-28 11:42:10,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:10,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 11:42:10,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:10,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 11:42:10,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-01-28 11:42:10,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 224 [2023-01-28 11:42:10,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 68 flow. Second operand has 17 states, 17 states have (on average 66.05882352941177) internal successors, (1123), 17 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:10,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:10,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 224 [2023-01-28 11:42:10,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:10,771 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_73 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) (= 5 c_~x~0)) is different from false [2023-01-28 11:42:12,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:42:13,130 INFO L130 PetriNetUnfolder]: 233/456 cut-off events. [2023-01-28 11:42:13,130 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2023-01-28 11:42:13,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 456 events. 233/456 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2005 event pairs, 35 based on Foata normal form. 3/455 useless extension candidates. Maximal degree in co-relation 1117. Up to 120 conditions per place. [2023-01-28 11:42:13,135 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 76 selfloop transitions, 30 changer transitions 24/130 dead transitions. [2023-01-28 11:42:13,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 130 transitions, 659 flow [2023-01-28 11:42:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 11:42:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 11:42:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1346 transitions. [2023-01-28 11:42:13,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31625939849624063 [2023-01-28 11:42:13,139 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1346 transitions. [2023-01-28 11:42:13,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1346 transitions. [2023-01-28 11:42:13,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:13,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1346 transitions. [2023-01-28 11:42:13,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:13,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 224.0) internal successors, (4480), 20 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:13,177 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 224.0) internal successors, (4480), 20 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:13,177 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 68 flow. Second operand 19 states and 1346 transitions. [2023-01-28 11:42:13,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 130 transitions, 659 flow [2023-01-28 11:42:13,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 130 transitions, 645 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-01-28 11:42:13,181 INFO L231 Difference]: Finished difference. Result has 45 places, 50 transitions, 300 flow [2023-01-28 11:42:13,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=300, PETRI_PLACES=45, PETRI_TRANSITIONS=50} [2023-01-28 11:42:13,182 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 26 predicate places. [2023-01-28 11:42:13,182 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 50 transitions, 300 flow [2023-01-28 11:42:13,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 66.05882352941177) internal successors, (1123), 17 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:13,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:13,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:13,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 11:42:13,388 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 11:42:13,390 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 11:42:13,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:13,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1849941358, now seen corresponding path program 2 times [2023-01-28 11:42:13,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:13,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932261900] [2023-01-28 11:42:13,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:13,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:14,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:14,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932261900] [2023-01-28 11:42:14,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932261900] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:14,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308351196] [2023-01-28 11:42:14,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:42:14,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:14,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:14,052 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 11:42:14,068 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 11:42:14,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:42:14,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 11:42:14,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:42:14,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:14,236 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:42:14,237 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 24 treesize of output 11 [2023-01-28 11:42:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:42:14,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308351196] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:14,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:14,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 9 [2023-01-28 11:42:14,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820820156] [2023-01-28 11:42:14,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:14,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 11:42:14,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 11:42:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-01-28 11:42:14,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:42:14,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 50 transitions, 300 flow. Second operand has 11 states, 11 states have (on average 73.72727272727273) internal successors, (811), 11 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:14,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:14,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:42:14,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:14,509 INFO L130 PetriNetUnfolder]: 373/712 cut-off events. [2023-01-28 11:42:14,509 INFO L131 PetriNetUnfolder]: For 1243/1243 co-relation queries the response was YES. [2023-01-28 11:42:14,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 712 events. 373/712 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3550 event pairs, 72 based on Foata normal form. 1/710 useless extension candidates. Maximal degree in co-relation 2123. Up to 250 conditions per place. [2023-01-28 11:42:14,512 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 55 selfloop transitions, 33 changer transitions 16/104 dead transitions. [2023-01-28 11:42:14,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 104 transitions, 749 flow [2023-01-28 11:42:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 11:42:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 11:42:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 777 transitions. [2023-01-28 11:42:14,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346875 [2023-01-28 11:42:14,515 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 777 transitions. [2023-01-28 11:42:14,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 777 transitions. [2023-01-28 11:42:14,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:14,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 777 transitions. [2023-01-28 11:42:14,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.7) internal successors, (777), 10 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:14,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:14,519 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:14,519 INFO L175 Difference]: Start difference. First operand has 45 places, 50 transitions, 300 flow. Second operand 10 states and 777 transitions. [2023-01-28 11:42:14,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 104 transitions, 749 flow [2023-01-28 11:42:14,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 104 transitions, 695 flow, removed 25 selfloop flow, removed 2 redundant places. [2023-01-28 11:42:14,527 INFO L231 Difference]: Finished difference. Result has 54 places, 62 transitions, 444 flow [2023-01-28 11:42:14,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=444, PETRI_PLACES=54, PETRI_TRANSITIONS=62} [2023-01-28 11:42:14,529 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 35 predicate places. [2023-01-28 11:42:14,529 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 62 transitions, 444 flow [2023-01-28 11:42:14,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 73.72727272727273) internal successors, (811), 11 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:14,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:14,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:14,537 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 11:42:14,734 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 11:42:14,735 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 11:42:14,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash -169763452, now seen corresponding path program 3 times [2023-01-28 11:42:14,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:14,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780210976] [2023-01-28 11:42:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:14,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:15,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:15,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780210976] [2023-01-28 11:42:15,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780210976] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:15,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843883964] [2023-01-28 11:42:15,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:42:15,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:15,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:15,195 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 11:42:15,199 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 11:42:15,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:42:15,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:15,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 11:42:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:15,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:42:15,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:42:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:42:15,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:15,385 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_142 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_142) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2023-01-28 11:42:15,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:15,396 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 42 treesize of output 34 [2023-01-28 11:42:15,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-01-28 11:42:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 11:42:15,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843883964] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:15,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:15,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 15 [2023-01-28 11:42:15,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391870849] [2023-01-28 11:42:15,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:15,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 11:42:15,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:15,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 11:42:15,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=200, Unknown=1, NotChecked=28, Total=272 [2023-01-28 11:42:15,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 11:42:15,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 62 transitions, 444 flow. Second operand has 17 states, 17 states have (on average 69.11764705882354) internal successors, (1175), 17 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:15,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:15,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 11:42:15,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:15,869 INFO L130 PetriNetUnfolder]: 447/849 cut-off events. [2023-01-28 11:42:15,869 INFO L131 PetriNetUnfolder]: For 2200/2200 co-relation queries the response was YES. [2023-01-28 11:42:15,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3043 conditions, 849 events. 447/849 cut-off events. For 2200/2200 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4399 event pairs, 101 based on Foata normal form. 1/848 useless extension candidates. Maximal degree in co-relation 2664. Up to 250 conditions per place. [2023-01-28 11:42:15,873 INFO L137 encePairwiseOnDemand]: 213/224 looper letters, 60 selfloop transitions, 39 changer transitions 22/121 dead transitions. [2023-01-28 11:42:15,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 121 transitions, 931 flow [2023-01-28 11:42:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 11:42:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 11:42:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 888 transitions. [2023-01-28 11:42:15,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33035714285714285 [2023-01-28 11:42:15,876 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 888 transitions. [2023-01-28 11:42:15,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 888 transitions. [2023-01-28 11:42:15,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:15,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 888 transitions. [2023-01-28 11:42:15,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 74.0) internal successors, (888), 12 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:15,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:15,882 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:15,882 INFO L175 Difference]: Start difference. First operand has 54 places, 62 transitions, 444 flow. Second operand 12 states and 888 transitions. [2023-01-28 11:42:15,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 121 transitions, 931 flow [2023-01-28 11:42:15,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 121 transitions, 906 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-01-28 11:42:15,888 INFO L231 Difference]: Finished difference. Result has 63 places, 73 transitions, 632 flow [2023-01-28 11:42:15,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=632, PETRI_PLACES=63, PETRI_TRANSITIONS=73} [2023-01-28 11:42:15,890 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 44 predicate places. [2023-01-28 11:42:15,890 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 73 transitions, 632 flow [2023-01-28 11:42:15,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 69.11764705882354) internal successors, (1175), 17 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:15,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:15,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:15,913 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 11:42:16,096 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 11:42:16,096 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 11:42:16,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1698945970, now seen corresponding path program 4 times [2023-01-28 11:42:16,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:16,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132839873] [2023-01-28 11:42:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:16,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:16,190 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 11:42:16,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:16,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132839873] [2023-01-28 11:42:16,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132839873] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:16,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343206318] [2023-01-28 11:42:16,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:42:16,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:16,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:16,192 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 11:42:16,208 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 11:42:16,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:42:16,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:16,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:42:16,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:16,279 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 11:42:16,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:16,341 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 11:42:16,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343206318] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:16,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:16,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-01-28 11:42:16,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013640552] [2023-01-28 11:42:16,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:16,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 11:42:16,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 11:42:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-01-28 11:42:16,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2023-01-28 11:42:16,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 632 flow. Second operand has 8 states, 8 states have (on average 102.625) internal successors, (821), 8 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 11:42:16,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:16,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2023-01-28 11:42:16,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:16,464 INFO L130 PetriNetUnfolder]: 649/1254 cut-off events. [2023-01-28 11:42:16,464 INFO L131 PetriNetUnfolder]: For 5191/5191 co-relation queries the response was YES. [2023-01-28 11:42:16,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5401 conditions, 1254 events. 649/1254 cut-off events. For 5191/5191 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7226 event pairs, 178 based on Foata normal form. 42/1295 useless extension candidates. Maximal degree in co-relation 4475. Up to 688 conditions per place. [2023-01-28 11:42:16,469 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 64 selfloop transitions, 28 changer transitions 6/98 dead transitions. [2023-01-28 11:42:16,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 98 transitions, 1048 flow [2023-01-28 11:42:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:42:16,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:42:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 429 transitions. [2023-01-28 11:42:16,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47879464285714285 [2023-01-28 11:42:16,470 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 429 transitions. [2023-01-28 11:42:16,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 429 transitions. [2023-01-28 11:42:16,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:16,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 429 transitions. [2023-01-28 11:42:16,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:16,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:16,472 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:16,472 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 632 flow. Second operand 4 states and 429 transitions. [2023-01-28 11:42:16,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 98 transitions, 1048 flow [2023-01-28 11:42:16,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 98 transitions, 959 flow, removed 18 selfloop flow, removed 10 redundant places. [2023-01-28 11:42:16,484 INFO L231 Difference]: Finished difference. Result has 56 places, 76 transitions, 774 flow [2023-01-28 11:42:16,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=774, PETRI_PLACES=56, PETRI_TRANSITIONS=76} [2023-01-28 11:42:16,485 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 37 predicate places. [2023-01-28 11:42:16,485 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 76 transitions, 774 flow [2023-01-28 11:42:16,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.625) internal successors, (821), 8 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 11:42:16,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:16,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:16,497 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 11:42:16,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:16,690 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:42:16,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:16,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1715728177, now seen corresponding path program 5 times [2023-01-28 11:42:16,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:16,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822805432] [2023-01-28 11:42:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:16,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:42:16,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:16,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822805432] [2023-01-28 11:42:16,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822805432] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:16,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855227842] [2023-01-28 11:42:16,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:42:16,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:16,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:16,764 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 11:42:16,766 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 11:42:16,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:42:16,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:16,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:42:16,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:16,872 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 11:42:16,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:42:16,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855227842] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:16,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:16,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 11:42:16,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682360831] [2023-01-28 11:42:16,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:16,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 11:42:16,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:16,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 11:42:16,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 11:42:16,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 224 [2023-01-28 11:42:16,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 76 transitions, 774 flow. Second operand has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:16,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:16,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 224 [2023-01-28 11:42:16,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:17,098 INFO L130 PetriNetUnfolder]: 454/901 cut-off events. [2023-01-28 11:42:17,098 INFO L131 PetriNetUnfolder]: For 4107/4107 co-relation queries the response was YES. [2023-01-28 11:42:17,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4091 conditions, 901 events. 454/901 cut-off events. For 4107/4107 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4834 event pairs, 291 based on Foata normal form. 19/919 useless extension candidates. Maximal degree in co-relation 2491. Up to 770 conditions per place. [2023-01-28 11:42:17,102 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 55 selfloop transitions, 3 changer transitions 21/79 dead transitions. [2023-01-28 11:42:17,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 851 flow [2023-01-28 11:42:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:42:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:42:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 554 transitions. [2023-01-28 11:42:17,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41220238095238093 [2023-01-28 11:42:17,104 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 554 transitions. [2023-01-28 11:42:17,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 554 transitions. [2023-01-28 11:42:17,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:17,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 554 transitions. [2023-01-28 11:42:17,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.33333333333333) internal successors, (554), 6 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:17,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:17,106 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:17,106 INFO L175 Difference]: Start difference. First operand has 56 places, 76 transitions, 774 flow. Second operand 6 states and 554 transitions. [2023-01-28 11:42:17,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 851 flow [2023-01-28 11:42:17,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 835 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-01-28 11:42:17,112 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 566 flow [2023-01-28 11:42:17,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=566, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2023-01-28 11:42:17,113 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 40 predicate places. [2023-01-28 11:42:17,113 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 566 flow [2023-01-28 11:42:17,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:17,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:17,114 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:17,127 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 11:42:17,318 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 11:42:17,318 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 11:42:17,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:17,319 INFO L85 PathProgramCache]: Analyzing trace with hash 38426356, now seen corresponding path program 6 times [2023-01-28 11:42:17,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:17,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184154720] [2023-01-28 11:42:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:17,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:17,650 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 11:42:17,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:17,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184154720] [2023-01-28 11:42:17,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184154720] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:17,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270991325] [2023-01-28 11:42:17,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:42:17,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:17,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:17,651 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 11:42:17,653 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 11:42:17,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 11:42:17,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:17,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-28 11:42:17,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:17,794 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 11:42:17,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:17,813 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:42:17,813 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 25 treesize of output 13 [2023-01-28 11:42:17,825 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 11:42:17,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270991325] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:17,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:17,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 13 [2023-01-28 11:42:17,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265559455] [2023-01-28 11:42:17,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:17,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 11:42:17,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:17,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 11:42:17,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-01-28 11:42:17,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:42:17,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 566 flow. Second operand has 15 states, 15 states have (on average 73.26666666666667) internal successors, (1099), 15 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:17,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:17,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:42:17,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:18,456 INFO L130 PetriNetUnfolder]: 756/1430 cut-off events. [2023-01-28 11:42:18,456 INFO L131 PetriNetUnfolder]: For 5145/5145 co-relation queries the response was YES. [2023-01-28 11:42:18,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6360 conditions, 1430 events. 756/1430 cut-off events. For 5145/5145 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8388 event pairs, 86 based on Foata normal form. 9/1438 useless extension candidates. Maximal degree in co-relation 6331. Up to 811 conditions per place. [2023-01-28 11:42:18,461 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 103 selfloop transitions, 65 changer transitions 79/247 dead transitions. [2023-01-28 11:42:18,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 247 transitions, 2136 flow [2023-01-28 11:42:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 11:42:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 11:42:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2212 transitions. [2023-01-28 11:42:18,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35267857142857145 [2023-01-28 11:42:18,466 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2212 transitions. [2023-01-28 11:42:18,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2212 transitions. [2023-01-28 11:42:18,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:18,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2212 transitions. [2023-01-28 11:42:18,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 79.0) internal successors, (2212), 28 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:18,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 224.0) internal successors, (6496), 29 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:18,476 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 224.0) internal successors, (6496), 29 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:18,476 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 566 flow. Second operand 28 states and 2212 transitions. [2023-01-28 11:42:18,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 247 transitions, 2136 flow [2023-01-28 11:42:18,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 247 transitions, 2070 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-01-28 11:42:18,486 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 1141 flow [2023-01-28 11:42:18,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1141, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2023-01-28 11:42:18,486 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 67 predicate places. [2023-01-28 11:42:18,486 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 1141 flow [2023-01-28 11:42:18,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.26666666666667) internal successors, (1099), 15 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:18,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:18,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:18,507 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 11:42:18,691 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 11:42:18,692 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 11:42:18,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1519550220, now seen corresponding path program 7 times [2023-01-28 11:42:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:18,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317528580] [2023-01-28 11:42:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:18,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:19,062 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 11:42:19,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:19,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317528580] [2023-01-28 11:42:19,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317528580] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:19,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667033719] [2023-01-28 11:42:19,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:42:19,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:19,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:19,063 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 11:42:19,126 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 11:42:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:19,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 11:42:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:19,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:42:19,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:42:19,476 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:42:19,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-28 11:42:19,482 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 11:42:19,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:19,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:19,572 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 44 treesize of output 37 [2023-01-28 11:42:19,581 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 10 treesize of output 3 [2023-01-28 11:42:19,850 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 11:42:19,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667033719] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:19,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:19,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-28 11:42:19,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140302447] [2023-01-28 11:42:19,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:19,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 11:42:19,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:19,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 11:42:19,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=608, Unknown=1, NotChecked=0, Total=702 [2023-01-28 11:42:19,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 11:42:19,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 1141 flow. Second operand has 27 states, 27 states have (on average 68.77777777777777) internal successors, (1857), 27 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:19,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:19,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 11:42:19,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:21,964 INFO L130 PetriNetUnfolder]: 1188/2219 cut-off events. [2023-01-28 11:42:21,964 INFO L131 PetriNetUnfolder]: For 11776/11776 co-relation queries the response was YES. [2023-01-28 11:42:21,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10594 conditions, 2219 events. 1188/2219 cut-off events. For 11776/11776 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13623 event pairs, 180 based on Foata normal form. 6/2224 useless extension candidates. Maximal degree in co-relation 9756. Up to 1243 conditions per place. [2023-01-28 11:42:21,977 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 152 selfloop transitions, 75 changer transitions 32/259 dead transitions. [2023-01-28 11:42:21,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 259 transitions, 2961 flow [2023-01-28 11:42:21,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 11:42:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 11:42:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1797 transitions. [2023-01-28 11:42:21,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33426339285714285 [2023-01-28 11:42:21,982 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1797 transitions. [2023-01-28 11:42:21,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1797 transitions. [2023-01-28 11:42:21,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:21,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1797 transitions. [2023-01-28 11:42:21,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 74.875) internal successors, (1797), 24 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:21,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:21,991 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:21,991 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 1141 flow. Second operand 24 states and 1797 transitions. [2023-01-28 11:42:21,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 259 transitions, 2961 flow [2023-01-28 11:42:22,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 259 transitions, 2560 flow, removed 135 selfloop flow, removed 9 redundant places. [2023-01-28 11:42:22,012 INFO L231 Difference]: Finished difference. Result has 106 places, 134 transitions, 1668 flow [2023-01-28 11:42:22,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1668, PETRI_PLACES=106, PETRI_TRANSITIONS=134} [2023-01-28 11:42:22,013 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 87 predicate places. [2023-01-28 11:42:22,013 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 134 transitions, 1668 flow [2023-01-28 11:42:22,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.77777777777777) internal successors, (1857), 27 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:22,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:22,014 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:22,023 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 11:42:22,218 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 11:42:22,219 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 11:42:22,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1524792205, now seen corresponding path program 8 times [2023-01-28 11:42:22,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:22,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110593936] [2023-01-28 11:42:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:22,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:23,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:23,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110593936] [2023-01-28 11:42:23,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110593936] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:23,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134084339] [2023-01-28 11:42:23,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:42:23,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:23,092 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 11:42:23,127 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 11:42:23,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:42:23,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:23,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 11:42:23,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:23,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:42:23,355 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 19 treesize of output 21 [2023-01-28 11:42:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:42:23,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:23,429 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_310 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_310) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2023-01-28 11:42:23,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:23,443 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 44 treesize of output 37 [2023-01-28 11:42:23,451 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 10 treesize of output 3 [2023-01-28 11:42:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-01-28 11:42:23,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134084339] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:23,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:23,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 22 [2023-01-28 11:42:23,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809678428] [2023-01-28 11:42:23,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:23,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 11:42:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:23,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 11:42:23,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=451, Unknown=1, NotChecked=42, Total=552 [2023-01-28 11:42:23,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 11:42:23,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 134 transitions, 1668 flow. Second operand has 24 states, 24 states have (on average 68.79166666666667) internal successors, (1651), 24 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:23,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:23,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 11:42:23,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:25,038 INFO L130 PetriNetUnfolder]: 1572/2882 cut-off events. [2023-01-28 11:42:25,038 INFO L131 PetriNetUnfolder]: For 13850/13850 co-relation queries the response was YES. [2023-01-28 11:42:25,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13538 conditions, 2882 events. 1572/2882 cut-off events. For 13850/13850 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18088 event pairs, 242 based on Foata normal form. 1/2882 useless extension candidates. Maximal degree in co-relation 12581. Up to 1640 conditions per place. [2023-01-28 11:42:25,051 INFO L137 encePairwiseOnDemand]: 213/224 looper letters, 108 selfloop transitions, 123 changer transitions 42/273 dead transitions. [2023-01-28 11:42:25,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 273 transitions, 3323 flow [2023-01-28 11:42:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 11:42:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 11:42:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1409 transitions. [2023-01-28 11:42:25,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.331062030075188 [2023-01-28 11:42:25,053 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1409 transitions. [2023-01-28 11:42:25,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1409 transitions. [2023-01-28 11:42:25,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:25,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1409 transitions. [2023-01-28 11:42:25,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 74.15789473684211) internal successors, (1409), 19 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:25,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 224.0) internal successors, (4480), 20 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:25,061 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 224.0) internal successors, (4480), 20 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:25,061 INFO L175 Difference]: Start difference. First operand has 106 places, 134 transitions, 1668 flow. Second operand 19 states and 1409 transitions. [2023-01-28 11:42:25,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 273 transitions, 3323 flow [2023-01-28 11:42:25,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 273 transitions, 3019 flow, removed 147 selfloop flow, removed 4 redundant places. [2023-01-28 11:42:25,097 INFO L231 Difference]: Finished difference. Result has 123 places, 177 transitions, 2379 flow [2023-01-28 11:42:25,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2379, PETRI_PLACES=123, PETRI_TRANSITIONS=177} [2023-01-28 11:42:25,098 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 104 predicate places. [2023-01-28 11:42:25,098 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 177 transitions, 2379 flow [2023-01-28 11:42:25,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.79166666666667) internal successors, (1651), 24 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:25,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:25,098 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:25,105 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 11:42:25,303 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 11:42:25,304 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 11:42:25,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:25,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2103044417, now seen corresponding path program 9 times [2023-01-28 11:42:25,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:25,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185917078] [2023-01-28 11:42:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:25,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:25,390 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 11:42:25,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:25,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185917078] [2023-01-28 11:42:25,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185917078] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:25,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571078289] [2023-01-28 11:42:25,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:42:25,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:25,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:25,392 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 11:42:25,419 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 11:42:25,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:42:25,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 11:42:25,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:25,739 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-01-28 11:42:25,740 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 34 treesize of output 13 [2023-01-28 11:42:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:42:25,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:25,954 INFO L321 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-01-28 11:42:25,954 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 36 treesize of output 18 [2023-01-28 11:42:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:42:26,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571078289] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:26,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:26,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2023-01-28 11:42:26,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621732147] [2023-01-28 11:42:26,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:26,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 11:42:26,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 11:42:26,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-01-28 11:42:26,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 224 [2023-01-28 11:42:26,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 177 transitions, 2379 flow. Second operand has 18 states, 18 states have (on average 75.61111111111111) internal successors, (1361), 18 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:26,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:26,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 224 [2023-01-28 11:42:26,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:27,178 INFO L130 PetriNetUnfolder]: 2710/5062 cut-off events. [2023-01-28 11:42:27,179 INFO L131 PetriNetUnfolder]: For 32543/32543 co-relation queries the response was YES. [2023-01-28 11:42:27,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27851 conditions, 5062 events. 2710/5062 cut-off events. For 32543/32543 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36798 event pairs, 297 based on Foata normal form. 63/5124 useless extension candidates. Maximal degree in co-relation 26809. Up to 2842 conditions per place. [2023-01-28 11:42:27,199 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 154 selfloop transitions, 104 changer transitions 239/497 dead transitions. [2023-01-28 11:42:27,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 497 transitions, 6509 flow [2023-01-28 11:42:27,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 11:42:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 11:42:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2683 transitions. [2023-01-28 11:42:27,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36295995670995673 [2023-01-28 11:42:27,202 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2683 transitions. [2023-01-28 11:42:27,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2683 transitions. [2023-01-28 11:42:27,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:27,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2683 transitions. [2023-01-28 11:42:27,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 81.3030303030303) internal successors, (2683), 33 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:27,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:27,211 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:27,211 INFO L175 Difference]: Start difference. First operand has 123 places, 177 transitions, 2379 flow. Second operand 33 states and 2683 transitions. [2023-01-28 11:42:27,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 497 transitions, 6509 flow [2023-01-28 11:42:27,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 497 transitions, 6202 flow, removed 129 selfloop flow, removed 7 redundant places. [2023-01-28 11:42:27,285 INFO L231 Difference]: Finished difference. Result has 164 places, 158 transitions, 2386 flow [2023-01-28 11:42:27,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2386, PETRI_PLACES=164, PETRI_TRANSITIONS=158} [2023-01-28 11:42:27,285 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 145 predicate places. [2023-01-28 11:42:27,286 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 158 transitions, 2386 flow [2023-01-28 11:42:27,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 75.61111111111111) internal successors, (1361), 18 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:27,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:27,286 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:27,291 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 11:42:27,492 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 11:42:27,492 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 11:42:27,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1865335762, now seen corresponding path program 10 times [2023-01-28 11:42:27,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:27,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098619208] [2023-01-28 11:42:27,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:27,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:42:27,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:27,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098619208] [2023-01-28 11:42:27,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098619208] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:27,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282652533] [2023-01-28 11:42:27,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:42:27,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:27,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:27,588 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 11:42:27,590 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 11:42:27,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:42:27,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:27,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:42:27,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:27,728 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 11:42:27,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:27,792 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 11:42:27,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282652533] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:27,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:27,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 11:42:27,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258771406] [2023-01-28 11:42:27,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:27,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 11:42:27,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:27,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 11:42:27,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-01-28 11:42:27,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 224 [2023-01-28 11:42:27,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 158 transitions, 2386 flow. Second operand has 18 states, 18 states have (on average 88.11111111111111) internal successors, (1586), 18 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:27,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:27,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 224 [2023-01-28 11:42:27,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:28,062 INFO L130 PetriNetUnfolder]: 1153/2197 cut-off events. [2023-01-28 11:42:28,062 INFO L131 PetriNetUnfolder]: For 16730/16730 co-relation queries the response was YES. [2023-01-28 11:42:28,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13140 conditions, 2197 events. 1153/2197 cut-off events. For 16730/16730 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14218 event pairs, 719 based on Foata normal form. 14/2210 useless extension candidates. Maximal degree in co-relation 13090. Up to 2115 conditions per place. [2023-01-28 11:42:28,088 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 118 selfloop transitions, 4 changer transitions 15/137 dead transitions. [2023-01-28 11:42:28,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 137 transitions, 2256 flow [2023-01-28 11:42:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 11:42:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 11:42:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 721 transitions. [2023-01-28 11:42:28,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40234375 [2023-01-28 11:42:28,090 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 721 transitions. [2023-01-28 11:42:28,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 721 transitions. [2023-01-28 11:42:28,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:28,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 721 transitions. [2023-01-28 11:42:28,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.125) internal successors, (721), 8 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:28,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 224.0) internal successors, (2016), 9 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:28,092 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 224.0) internal successors, (2016), 9 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:28,092 INFO L175 Difference]: Start difference. First operand has 164 places, 158 transitions, 2386 flow. Second operand 8 states and 721 transitions. [2023-01-28 11:42:28,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 137 transitions, 2256 flow [2023-01-28 11:42:28,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 137 transitions, 2087 flow, removed 51 selfloop flow, removed 32 redundant places. [2023-01-28 11:42:28,119 INFO L231 Difference]: Finished difference. Result has 103 places, 122 transitions, 1711 flow [2023-01-28 11:42:28,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1711, PETRI_PLACES=103, PETRI_TRANSITIONS=122} [2023-01-28 11:42:28,120 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 84 predicate places. [2023-01-28 11:42:28,120 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 122 transitions, 1711 flow [2023-01-28 11:42:28,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.11111111111111) internal successors, (1586), 18 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:28,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:28,120 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:28,125 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 11:42:28,324 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 11:42:28,325 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 11:42:28,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash -367953955, now seen corresponding path program 11 times [2023-01-28 11:42:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:28,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639574168] [2023-01-28 11:42:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:28,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:28,766 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 11:42:28,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:28,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639574168] [2023-01-28 11:42:28,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639574168] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:28,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498822912] [2023-01-28 11:42:28,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:42:28,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:28,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:28,773 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 11:42:28,775 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 11:42:28,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:42:28,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:28,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 11:42:28,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:29,119 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:42:29,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-28 11:42:29,123 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 11:42:29,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:29,196 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:42:29,196 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 25 treesize of output 13 [2023-01-28 11:42:29,543 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 11:42:29,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498822912] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:29,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:29,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-28 11:42:29,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293215122] [2023-01-28 11:42:29,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:29,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 11:42:29,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:29,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 11:42:29,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 11:42:29,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:42:29,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 122 transitions, 1711 flow. Second operand has 33 states, 33 states have (on average 72.72727272727273) internal successors, (2400), 33 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:29,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:29,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:42:29,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:34,317 INFO L130 PetriNetUnfolder]: 3236/6017 cut-off events. [2023-01-28 11:42:34,317 INFO L131 PetriNetUnfolder]: For 34774/34774 co-relation queries the response was YES. [2023-01-28 11:42:34,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32149 conditions, 6017 events. 3236/6017 cut-off events. For 34774/34774 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42993 event pairs, 334 based on Foata normal form. 27/6043 useless extension candidates. Maximal degree in co-relation 32116. Up to 3241 conditions per place. [2023-01-28 11:42:34,345 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 477 selfloop transitions, 247 changer transitions 108/832 dead transitions. [2023-01-28 11:42:34,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 832 transitions, 9328 flow [2023-01-28 11:42:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-01-28 11:42:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-01-28 11:42:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 6436 transitions. [2023-01-28 11:42:34,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35471781305114636 [2023-01-28 11:42:34,352 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 6436 transitions. [2023-01-28 11:42:34,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 6436 transitions. [2023-01-28 11:42:34,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:34,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 6436 transitions. [2023-01-28 11:42:34,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 79.45679012345678) internal successors, (6436), 81 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:34,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 224.0) internal successors, (18368), 82 states have internal predecessors, (18368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:34,377 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 224.0) internal successors, (18368), 82 states have internal predecessors, (18368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:34,377 INFO L175 Difference]: Start difference. First operand has 103 places, 122 transitions, 1711 flow. Second operand 81 states and 6436 transitions. [2023-01-28 11:42:34,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 832 transitions, 9328 flow [2023-01-28 11:42:34,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 832 transitions, 9320 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 11:42:34,413 INFO L231 Difference]: Finished difference. Result has 201 places, 340 transitions, 5273 flow [2023-01-28 11:42:34,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=5273, PETRI_PLACES=201, PETRI_TRANSITIONS=340} [2023-01-28 11:42:34,414 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 182 predicate places. [2023-01-28 11:42:34,414 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 340 transitions, 5273 flow [2023-01-28 11:42:34,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 72.72727272727273) internal successors, (2400), 33 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:34,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:34,414 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:34,421 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 11:42:34,619 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 11:42:34,619 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 11:42:34,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:34,619 INFO L85 PathProgramCache]: Analyzing trace with hash 601946815, now seen corresponding path program 12 times [2023-01-28 11:42:34,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:34,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238408113] [2023-01-28 11:42:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:34,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:34,937 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 11:42:34,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:34,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238408113] [2023-01-28 11:42:34,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238408113] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:34,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826968349] [2023-01-28 11:42:34,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:42:34,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:34,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:34,953 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 11:42:34,954 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 11:42:35,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:42:35,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:35,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 11:42:35,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:35,261 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 11:42:35,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:35,303 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:42:35,304 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 25 treesize of output 13 [2023-01-28 11:42:35,572 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 11:42:35,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826968349] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:35,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:35,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-28 11:42:35,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436253463] [2023-01-28 11:42:35,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:35,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 11:42:35,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:35,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 11:42:35,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 11:42:35,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:42:35,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 340 transitions, 5273 flow. Second operand has 33 states, 33 states have (on average 72.54545454545455) internal successors, (2394), 33 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:35,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:35,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:42:35,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:38,132 INFO L130 PetriNetUnfolder]: 1833/3550 cut-off events. [2023-01-28 11:42:38,132 INFO L131 PetriNetUnfolder]: For 39653/39653 co-relation queries the response was YES. [2023-01-28 11:42:38,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20698 conditions, 3550 events. 1833/3550 cut-off events. For 39653/39653 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24584 event pairs, 168 based on Foata normal form. 126/3675 useless extension candidates. Maximal degree in co-relation 20633. Up to 1844 conditions per place. [2023-01-28 11:42:38,152 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 196 selfloop transitions, 133 changer transitions 195/524 dead transitions. [2023-01-28 11:42:38,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 524 transitions, 6941 flow [2023-01-28 11:42:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-01-28 11:42:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-01-28 11:42:38,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4270 transitions. [2023-01-28 11:42:38,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35300925925925924 [2023-01-28 11:42:38,156 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4270 transitions. [2023-01-28 11:42:38,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4270 transitions. [2023-01-28 11:42:38,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:38,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4270 transitions. [2023-01-28 11:42:38,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 79.07407407407408) internal successors, (4270), 54 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:38,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 224.0) internal successors, (12320), 55 states have internal predecessors, (12320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:38,167 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 224.0) internal successors, (12320), 55 states have internal predecessors, (12320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:38,167 INFO L175 Difference]: Start difference. First operand has 201 places, 340 transitions, 5273 flow. Second operand 54 states and 4270 transitions. [2023-01-28 11:42:38,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 524 transitions, 6941 flow [2023-01-28 11:42:38,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 524 transitions, 6200 flow, removed 352 selfloop flow, removed 30 redundant places. [2023-01-28 11:42:38,230 INFO L231 Difference]: Finished difference. Result has 187 places, 173 transitions, 2937 flow [2023-01-28 11:42:38,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=2937, PETRI_PLACES=187, PETRI_TRANSITIONS=173} [2023-01-28 11:42:38,231 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 168 predicate places. [2023-01-28 11:42:38,231 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 173 transitions, 2937 flow [2023-01-28 11:42:38,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 72.54545454545455) internal successors, (2394), 33 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:38,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:38,231 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:38,239 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 11:42:38,436 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 11:42:38,436 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 11:42:38,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash -736098531, now seen corresponding path program 13 times [2023-01-28 11:42:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:38,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772006348] [2023-01-28 11:42:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:39,056 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 11:42:39,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:39,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772006348] [2023-01-28 11:42:39,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772006348] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:39,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488926673] [2023-01-28 11:42:39,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:42:39,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:39,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:39,061 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 11:42:39,063 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 11:42:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:39,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 11:42:39,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:39,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:42:39,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:42:39,520 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:42:39,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-28 11:42:39,525 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 11:42:39,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:39,596 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_493 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_493) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)) 5)) is different from false [2023-01-28 11:42:39,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:39,609 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 44 treesize of output 37 [2023-01-28 11:42:39,617 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 10 treesize of output 3 [2023-01-28 11:42:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-01-28 11:42:40,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488926673] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:40,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:40,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-01-28 11:42:40,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502135230] [2023-01-28 11:42:40,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:40,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 11:42:40,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 11:42:40,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1054, Unknown=1, NotChecked=66, Total=1260 [2023-01-28 11:42:40,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 11:42:40,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 173 transitions, 2937 flow. Second operand has 36 states, 36 states have (on average 68.58333333333333) internal successors, (2469), 36 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:40,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:40,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 11:42:40,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:42,690 INFO L130 PetriNetUnfolder]: 1609/3145 cut-off events. [2023-01-28 11:42:42,690 INFO L131 PetriNetUnfolder]: For 25326/25326 co-relation queries the response was YES. [2023-01-28 11:42:42,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18885 conditions, 3145 events. 1609/3145 cut-off events. For 25326/25326 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21480 event pairs, 481 based on Foata normal form. 1/3145 useless extension candidates. Maximal degree in co-relation 18829. Up to 1869 conditions per place. [2023-01-28 11:42:42,720 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 171 selfloop transitions, 65 changer transitions 46/282 dead transitions. [2023-01-28 11:42:42,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 282 transitions, 4222 flow [2023-01-28 11:42:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 11:42:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 11:42:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1624 transitions. [2023-01-28 11:42:42,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2023-01-28 11:42:42,738 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1624 transitions. [2023-01-28 11:42:42,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1624 transitions. [2023-01-28 11:42:42,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:42,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1624 transitions. [2023-01-28 11:42:42,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 73.81818181818181) internal successors, (1624), 22 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:42,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:42,743 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:42,743 INFO L175 Difference]: Start difference. First operand has 187 places, 173 transitions, 2937 flow. Second operand 22 states and 1624 transitions. [2023-01-28 11:42:42,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 282 transitions, 4222 flow [2023-01-28 11:42:42,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 282 transitions, 3977 flow, removed 95 selfloop flow, removed 14 redundant places. [2023-01-28 11:42:42,845 INFO L231 Difference]: Finished difference. Result has 179 places, 175 transitions, 2878 flow [2023-01-28 11:42:42,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2878, PETRI_PLACES=179, PETRI_TRANSITIONS=175} [2023-01-28 11:42:42,846 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 160 predicate places. [2023-01-28 11:42:42,846 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 175 transitions, 2878 flow [2023-01-28 11:42:42,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 68.58333333333333) internal successors, (2469), 36 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:42,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:42,847 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:42,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 11:42:43,052 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 11:42:43,052 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 11:42:43,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:43,052 INFO L85 PathProgramCache]: Analyzing trace with hash -966795058, now seen corresponding path program 14 times [2023-01-28 11:42:43,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:43,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753627499] [2023-01-28 11:42:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:43,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:44,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:44,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753627499] [2023-01-28 11:42:44,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753627499] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:44,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867358164] [2023-01-28 11:42:44,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:42:44,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:44,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:44,130 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 11:42:44,132 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 11:42:44,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:42:44,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:44,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 11:42:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:42:44,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:44,429 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:42:44,430 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 25 treesize of output 13 [2023-01-28 11:42:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:42:44,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867358164] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:44,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:44,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 21 [2023-01-28 11:42:44,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399426534] [2023-01-28 11:42:44,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:44,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 11:42:44,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:44,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 11:42:44,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2023-01-28 11:42:44,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:42:44,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 175 transitions, 2878 flow. Second operand has 23 states, 23 states have (on average 72.82608695652173) internal successors, (1675), 23 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:44,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:44,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:42:44,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:46,960 INFO L130 PetriNetUnfolder]: 2392/4570 cut-off events. [2023-01-28 11:42:46,960 INFO L131 PetriNetUnfolder]: For 36404/36404 co-relation queries the response was YES. [2023-01-28 11:42:46,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26789 conditions, 4570 events. 2392/4570 cut-off events. For 36404/36404 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 32539 event pairs, 205 based on Foata normal form. 14/4582 useless extension candidates. Maximal degree in co-relation 26737. Up to 2421 conditions per place. [2023-01-28 11:42:46,982 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 185 selfloop transitions, 233 changer transitions 152/570 dead transitions. [2023-01-28 11:42:46,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 570 transitions, 7457 flow [2023-01-28 11:42:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-01-28 11:42:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-01-28 11:42:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3948 transitions. [2023-01-28 11:42:46,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3525 [2023-01-28 11:42:46,986 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3948 transitions. [2023-01-28 11:42:46,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3948 transitions. [2023-01-28 11:42:46,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:46,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3948 transitions. [2023-01-28 11:42:46,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 78.96) internal successors, (3948), 50 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:46,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 224.0) internal successors, (11424), 51 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:46,996 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 224.0) internal successors, (11424), 51 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:46,997 INFO L175 Difference]: Start difference. First operand has 179 places, 175 transitions, 2878 flow. Second operand 50 states and 3948 transitions. [2023-01-28 11:42:46,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 570 transitions, 7457 flow [2023-01-28 11:42:47,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 570 transitions, 7242 flow, removed 34 selfloop flow, removed 18 redundant places. [2023-01-28 11:42:47,070 INFO L231 Difference]: Finished difference. Result has 218 places, 262 transitions, 4795 flow [2023-01-28 11:42:47,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4795, PETRI_PLACES=218, PETRI_TRANSITIONS=262} [2023-01-28 11:42:47,071 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 199 predicate places. [2023-01-28 11:42:47,071 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 262 transitions, 4795 flow [2023-01-28 11:42:47,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 72.82608695652173) internal successors, (1675), 23 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:47,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:47,071 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:47,081 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 11:42:47,276 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 11:42:47,276 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 11:42:47,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash 26327022, now seen corresponding path program 15 times [2023-01-28 11:42:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:47,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125323486] [2023-01-28 11:42:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:47,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:42:47,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:47,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125323486] [2023-01-28 11:42:47,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125323486] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:47,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697024361] [2023-01-28 11:42:47,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:42:47,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:47,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:47,373 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 11:42:47,394 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 11:42:47,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:42:47,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:47,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 11:42:47,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:42:47,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:42:47,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697024361] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:47,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:47,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 14 [2023-01-28 11:42:47,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313506134] [2023-01-28 11:42:47,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:47,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 11:42:47,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:47,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 11:42:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2023-01-28 11:42:47,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 224 [2023-01-28 11:42:47,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 262 transitions, 4795 flow. Second operand has 15 states, 15 states have (on average 98.13333333333334) internal successors, (1472), 15 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:47,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:47,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 224 [2023-01-28 11:42:47,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:48,630 INFO L130 PetriNetUnfolder]: 3850/7231 cut-off events. [2023-01-28 11:42:48,631 INFO L131 PetriNetUnfolder]: For 67832/67832 co-relation queries the response was YES. [2023-01-28 11:42:48,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43697 conditions, 7231 events. 3850/7231 cut-off events. For 67832/67832 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 55150 event pairs, 708 based on Foata normal form. 24/7254 useless extension candidates. Maximal degree in co-relation 43637. Up to 3912 conditions per place. [2023-01-28 11:42:48,667 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 119 selfloop transitions, 217 changer transitions 52/388 dead transitions. [2023-01-28 11:42:48,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 388 transitions, 7735 flow [2023-01-28 11:42:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:42:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:42:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 629 transitions. [2023-01-28 11:42:48,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680059523809524 [2023-01-28 11:42:48,669 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 629 transitions. [2023-01-28 11:42:48,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 629 transitions. [2023-01-28 11:42:48,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:48,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 629 transitions. [2023-01-28 11:42:48,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.83333333333333) internal successors, (629), 6 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:48,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:48,670 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:48,670 INFO L175 Difference]: Start difference. First operand has 218 places, 262 transitions, 4795 flow. Second operand 6 states and 629 transitions. [2023-01-28 11:42:48,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 388 transitions, 7735 flow [2023-01-28 11:42:48,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 388 transitions, 7318 flow, removed 132 selfloop flow, removed 12 redundant places. [2023-01-28 11:42:48,822 INFO L231 Difference]: Finished difference. Result has 212 places, 302 transitions, 5788 flow [2023-01-28 11:42:48,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=4478, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5788, PETRI_PLACES=212, PETRI_TRANSITIONS=302} [2023-01-28 11:42:48,822 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 193 predicate places. [2023-01-28 11:42:48,822 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 302 transitions, 5788 flow [2023-01-28 11:42:48,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.13333333333334) internal successors, (1472), 15 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:48,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:48,823 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:48,830 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 11:42:49,028 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 11:42:49,028 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 11:42:49,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:49,028 INFO L85 PathProgramCache]: Analyzing trace with hash -785981026, now seen corresponding path program 16 times [2023-01-28 11:42:49,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:49,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647382596] [2023-01-28 11:42:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:49,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:50,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:50,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647382596] [2023-01-28 11:42:50,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647382596] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:50,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076833092] [2023-01-28 11:42:50,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:42:50,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:50,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:50,190 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 11:42:50,191 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 11:42:50,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:42:50,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:50,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 11:42:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:42:50,466 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 19 treesize of output 21 [2023-01-28 11:42:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:42:50,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:50,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:42:50,608 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 44 treesize of output 37 [2023-01-28 11:42:50,611 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 10 treesize of output 3 [2023-01-28 11:42:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:42:50,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076833092] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:50,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:50,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 29 [2023-01-28 11:42:50,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255562014] [2023-01-28 11:42:50,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:50,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 11:42:50,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 11:42:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=847, Unknown=4, NotChecked=0, Total=930 [2023-01-28 11:42:50,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 11:42:50,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 302 transitions, 5788 flow. Second operand has 31 states, 31 states have (on average 68.45161290322581) internal successors, (2122), 31 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:50,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:50,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 11:42:50,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:42:53,125 INFO L130 PetriNetUnfolder]: 3655/6729 cut-off events. [2023-01-28 11:42:53,125 INFO L131 PetriNetUnfolder]: For 62450/62450 co-relation queries the response was YES. [2023-01-28 11:42:53,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42585 conditions, 6729 events. 3655/6729 cut-off events. For 62450/62450 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 50060 event pairs, 392 based on Foata normal form. 5/6733 useless extension candidates. Maximal degree in co-relation 42525. Up to 3705 conditions per place. [2023-01-28 11:42:53,161 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 106 selfloop transitions, 282 changer transitions 49/437 dead transitions. [2023-01-28 11:42:53,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 437 transitions, 7900 flow [2023-01-28 11:42:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 11:42:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 11:42:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1553 transitions. [2023-01-28 11:42:53,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33014455782312924 [2023-01-28 11:42:53,166 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1553 transitions. [2023-01-28 11:42:53,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1553 transitions. [2023-01-28 11:42:53,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:42:53,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1553 transitions. [2023-01-28 11:42:53,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 73.95238095238095) internal successors, (1553), 21 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:53,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:53,174 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:53,174 INFO L175 Difference]: Start difference. First operand has 212 places, 302 transitions, 5788 flow. Second operand 21 states and 1553 transitions. [2023-01-28 11:42:53,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 437 transitions, 7900 flow [2023-01-28 11:42:53,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 437 transitions, 6962 flow, removed 409 selfloop flow, removed 14 redundant places. [2023-01-28 11:42:53,341 INFO L231 Difference]: Finished difference. Result has 179 places, 315 transitions, 5993 flow [2023-01-28 11:42:53,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5168, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5993, PETRI_PLACES=179, PETRI_TRANSITIONS=315} [2023-01-28 11:42:53,342 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 160 predicate places. [2023-01-28 11:42:53,342 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 315 transitions, 5993 flow [2023-01-28 11:42:53,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 68.45161290322581) internal successors, (2122), 31 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:53,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:42:53,342 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:53,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 11:42:53,547 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 11:42:53,547 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 11:42:53,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:42:53,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1260842560, now seen corresponding path program 17 times [2023-01-28 11:42:53,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:42:53,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634931835] [2023-01-28 11:42:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:42:53,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:42:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:42:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:53,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:42:53,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634931835] [2023-01-28 11:42:53,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634931835] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:42:53,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857574960] [2023-01-28 11:42:53,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:42:53,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:53,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:42:53,945 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 11:42:53,948 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 11:42:54,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:42:54,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:42:54,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 11:42:54,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:42:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:54,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:42:54,448 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:42:54,448 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 25 treesize of output 13 [2023-01-28 11:42:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:42:54,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857574960] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:42:54,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:42:54,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-01-28 11:42:54,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492462774] [2023-01-28 11:42:54,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:42:54,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 11:42:54,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:42:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 11:42:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 11:42:54,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:42:54,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 315 transitions, 5993 flow. Second operand has 42 states, 42 states have (on average 72.57142857142857) internal successors, (3048), 42 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:54,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:42:54,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:42:54,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:43:05,225 INFO L130 PetriNetUnfolder]: 10063/18427 cut-off events. [2023-01-28 11:43:05,225 INFO L131 PetriNetUnfolder]: For 152817/152817 co-relation queries the response was YES. [2023-01-28 11:43:05,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98199 conditions, 18427 events. 10063/18427 cut-off events. For 152817/152817 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 156184 event pairs, 455 based on Foata normal form. 40/18466 useless extension candidates. Maximal degree in co-relation 98149. Up to 10134 conditions per place. [2023-01-28 11:43:05,317 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 889 selfloop transitions, 843 changer transitions 307/2039 dead transitions. [2023-01-28 11:43:05,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 2039 transitions, 26773 flow [2023-01-28 11:43:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2023-01-28 11:43:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2023-01-28 11:43:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 14375 transitions. [2023-01-28 11:43:05,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3545530781373323 [2023-01-28 11:43:05,330 INFO L72 ComplementDD]: Start complementDD. Operand 181 states and 14375 transitions. [2023-01-28 11:43:05,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 181 states and 14375 transitions. [2023-01-28 11:43:05,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:43:05,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 181 states and 14375 transitions. [2023-01-28 11:43:05,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 182 states, 181 states have (on average 79.41988950276243) internal successors, (14375), 181 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:05,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 182 states, 182 states have (on average 224.0) internal successors, (40768), 182 states have internal predecessors, (40768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:05,377 INFO L81 ComplementDD]: Finished complementDD. Result has 182 states, 182 states have (on average 224.0) internal successors, (40768), 182 states have internal predecessors, (40768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:05,377 INFO L175 Difference]: Start difference. First operand has 179 places, 315 transitions, 5993 flow. Second operand 181 states and 14375 transitions. [2023-01-28 11:43:05,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 2039 transitions, 26773 flow [2023-01-28 11:43:05,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 2039 transitions, 25145 flow, removed 580 selfloop flow, removed 14 redundant places. [2023-01-28 11:43:05,736 INFO L231 Difference]: Finished difference. Result has 385 places, 919 transitions, 16350 flow [2023-01-28 11:43:05,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5656, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=181, PETRI_FLOW=16350, PETRI_PLACES=385, PETRI_TRANSITIONS=919} [2023-01-28 11:43:05,736 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 366 predicate places. [2023-01-28 11:43:05,736 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 919 transitions, 16350 flow [2023-01-28 11:43:05,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 72.57142857142857) internal successors, (3048), 42 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:05,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:43:05,737 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:43:05,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-28 11:43:05,941 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 11:43:05,941 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 11:43:05,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:43:05,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1962125600, now seen corresponding path program 18 times [2023-01-28 11:43:05,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:43:05,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983120690] [2023-01-28 11:43:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:43:05,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:43:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:43:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:06,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:43:06,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983120690] [2023-01-28 11:43:06,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983120690] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:43:06,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817445950] [2023-01-28 11:43:06,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:43:06,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:43:06,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:43:06,370 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 11:43:06,371 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 11:43:06,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 11:43:06,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:43:06,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 11:43:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:43:06,874 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:43:06,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:43:06,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2023-01-28 11:43:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:06,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:43:06,929 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:43:06,929 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 24 treesize of output 11 [2023-01-28 11:43:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:07,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817445950] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:43:07,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:43:07,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-01-28 11:43:07,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239517804] [2023-01-28 11:43:07,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:43:07,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 11:43:07,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:43:07,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 11:43:07,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1336, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 11:43:07,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:43:07,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 919 transitions, 16350 flow. Second operand has 41 states, 41 states have (on average 72.58536585365853) internal successors, (2976), 41 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:07,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:43:07,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:43:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:43:11,850 INFO L130 PetriNetUnfolder]: 6149/11683 cut-off events. [2023-01-28 11:43:11,850 INFO L131 PetriNetUnfolder]: For 154416/154416 co-relation queries the response was YES. [2023-01-28 11:43:11,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65668 conditions, 11683 events. 6149/11683 cut-off events. For 154416/154416 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 97418 event pairs, 422 based on Foata normal form. 406/12088 useless extension candidates. Maximal degree in co-relation 65579. Up to 6297 conditions per place. [2023-01-28 11:43:11,914 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 332 selfloop transitions, 439 changer transitions 225/996 dead transitions. [2023-01-28 11:43:11,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 996 transitions, 16468 flow [2023-01-28 11:43:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-01-28 11:43:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-01-28 11:43:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5606 transitions. [2023-01-28 11:43:11,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.352489939637827 [2023-01-28 11:43:11,917 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5606 transitions. [2023-01-28 11:43:11,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5606 transitions. [2023-01-28 11:43:11,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:43:11,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5606 transitions. [2023-01-28 11:43:11,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 78.95774647887323) internal successors, (5606), 71 states have internal predecessors, (5606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:11,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 224.0) internal successors, (16128), 72 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:11,930 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 224.0) internal successors, (16128), 72 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:11,931 INFO L175 Difference]: Start difference. First operand has 385 places, 919 transitions, 16350 flow. Second operand 71 states and 5606 transitions. [2023-01-28 11:43:11,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 996 transitions, 16468 flow [2023-01-28 11:43:12,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 996 transitions, 14960 flow, removed 716 selfloop flow, removed 42 redundant places. [2023-01-28 11:43:12,383 INFO L231 Difference]: Finished difference. Result has 328 places, 549 transitions, 11257 flow [2023-01-28 11:43:12,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=11257, PETRI_PLACES=328, PETRI_TRANSITIONS=549} [2023-01-28 11:43:12,383 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 309 predicate places. [2023-01-28 11:43:12,383 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 549 transitions, 11257 flow [2023-01-28 11:43:12,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 72.58536585365853) internal successors, (2976), 41 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:12,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:43:12,384 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:43:12,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-28 11:43:12,588 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 11:43:12,588 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 11:43:12,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:43:12,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1932928448, now seen corresponding path program 19 times [2023-01-28 11:43:12,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:43:12,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525741054] [2023-01-28 11:43:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:43:12,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:43:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:43:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:13,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:43:13,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525741054] [2023-01-28 11:43:13,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525741054] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:43:13,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509340123] [2023-01-28 11:43:13,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:43:13,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:43:13,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:43:13,150 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 11:43:13,179 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 11:43:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:43:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 11:43:13,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:43:13,633 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:43:13,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-28 11:43:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:13,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:43:13,700 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:43:13,700 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 25 treesize of output 13 [2023-01-28 11:43:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:14,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509340123] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:43:14,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:43:14,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-01-28 11:43:14,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804412614] [2023-01-28 11:43:14,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:43:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 11:43:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:43:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 11:43:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1526, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 11:43:14,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:43:14,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 549 transitions, 11257 flow. Second operand has 42 states, 42 states have (on average 72.57142857142857) internal successors, (3048), 42 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:14,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:43:14,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:43:14,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:43:19,603 INFO L130 PetriNetUnfolder]: 6345/12128 cut-off events. [2023-01-28 11:43:19,603 INFO L131 PetriNetUnfolder]: For 124504/124504 co-relation queries the response was YES. [2023-01-28 11:43:19,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69401 conditions, 12128 events. 6345/12128 cut-off events. For 124504/124504 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 102572 event pairs, 1480 based on Foata normal form. 3/12131 useless extension candidates. Maximal degree in co-relation 69321. Up to 6541 conditions per place. [2023-01-28 11:43:19,677 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 452 selfloop transitions, 264 changer transitions 247/963 dead transitions. [2023-01-28 11:43:19,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 963 transitions, 16040 flow [2023-01-28 11:43:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-01-28 11:43:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-01-28 11:43:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4935 transitions. [2023-01-28 11:43:19,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34970238095238093 [2023-01-28 11:43:19,680 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4935 transitions. [2023-01-28 11:43:19,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4935 transitions. [2023-01-28 11:43:19,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:43:19,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4935 transitions. [2023-01-28 11:43:19,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 78.33333333333333) internal successors, (4935), 63 states have internal predecessors, (4935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:19,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 224.0) internal successors, (14336), 64 states have internal predecessors, (14336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:19,691 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 224.0) internal successors, (14336), 64 states have internal predecessors, (14336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:19,691 INFO L175 Difference]: Start difference. First operand has 328 places, 549 transitions, 11257 flow. Second operand 63 states and 4935 transitions. [2023-01-28 11:43:19,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 963 transitions, 16040 flow [2023-01-28 11:43:20,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 963 transitions, 15555 flow, removed 125 selfloop flow, removed 14 redundant places. [2023-01-28 11:43:20,344 INFO L231 Difference]: Finished difference. Result has 375 places, 557 transitions, 11581 flow [2023-01-28 11:43:20,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=10829, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=11581, PETRI_PLACES=375, PETRI_TRANSITIONS=557} [2023-01-28 11:43:20,345 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 356 predicate places. [2023-01-28 11:43:20,345 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 557 transitions, 11581 flow [2023-01-28 11:43:20,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 72.57142857142857) internal successors, (3048), 42 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:20,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:43:20,345 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:43:20,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-01-28 11:43:20,554 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 11:43:20,554 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 11:43:20,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:43:20,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1027816736, now seen corresponding path program 20 times [2023-01-28 11:43:20,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:43:20,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669771066] [2023-01-28 11:43:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:43:20,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:43:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:43:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:21,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:43:21,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669771066] [2023-01-28 11:43:21,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669771066] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:43:21,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401942844] [2023-01-28 11:43:21,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:43:21,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:43:21,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:43:21,149 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 11:43:21,150 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 11:43:21,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:43:21,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:43:21,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 11:43:21,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:43:21,674 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:43:21,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-28 11:43:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:21,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:43:21,837 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:43:21,838 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 24 treesize of output 11 [2023-01-28 11:43:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:22,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401942844] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:43:22,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:43:22,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-01-28 11:43:22,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582905457] [2023-01-28 11:43:22,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:43:22,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 11:43:22,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:43:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 11:43:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 11:43:22,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:43:22,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 557 transitions, 11581 flow. Second operand has 42 states, 42 states have (on average 72.57142857142857) internal successors, (3048), 42 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:22,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:43:22,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:43:22,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:43:34,451 INFO L130 PetriNetUnfolder]: 6841/13125 cut-off events. [2023-01-28 11:43:34,451 INFO L131 PetriNetUnfolder]: For 135986/135986 co-relation queries the response was YES. [2023-01-28 11:43:34,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75763 conditions, 13125 events. 6841/13125 cut-off events. For 135986/135986 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 112141 event pairs, 1416 based on Foata normal form. 75/13200 useless extension candidates. Maximal degree in co-relation 75680. Up to 7145 conditions per place. [2023-01-28 11:43:34,522 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 304 selfloop transitions, 33 changer transitions 966/1303 dead transitions. [2023-01-28 11:43:34,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1303 transitions, 19509 flow [2023-01-28 11:43:34,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-01-28 11:43:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2023-01-28 11:43:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 8635 transitions. [2023-01-28 11:43:34,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35044642857142855 [2023-01-28 11:43:34,558 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 8635 transitions. [2023-01-28 11:43:34,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 8635 transitions. [2023-01-28 11:43:34,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:43:34,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 8635 transitions. [2023-01-28 11:43:34,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 78.5) internal successors, (8635), 110 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:34,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 224.0) internal successors, (24864), 111 states have internal predecessors, (24864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:34,604 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 224.0) internal successors, (24864), 111 states have internal predecessors, (24864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:34,604 INFO L175 Difference]: Start difference. First operand has 375 places, 557 transitions, 11581 flow. Second operand 110 states and 8635 transitions. [2023-01-28 11:43:34,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1303 transitions, 19509 flow [2023-01-28 11:43:35,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1303 transitions, 18383 flow, removed 91 selfloop flow, removed 45 redundant places. [2023-01-28 11:43:35,332 INFO L231 Difference]: Finished difference. Result has 423 places, 311 transitions, 5968 flow [2023-01-28 11:43:35,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=10144, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=5968, PETRI_PLACES=423, PETRI_TRANSITIONS=311} [2023-01-28 11:43:35,333 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 404 predicate places. [2023-01-28 11:43:35,333 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 311 transitions, 5968 flow [2023-01-28 11:43:35,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 72.57142857142857) internal successors, (3048), 42 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:35,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:43:35,334 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:43:35,338 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 11:43:35,538 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 11:43:35,538 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 11:43:35,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:43:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash -276467372, now seen corresponding path program 21 times [2023-01-28 11:43:35,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:43:35,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811714373] [2023-01-28 11:43:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:43:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:43:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:43:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:36,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:43:36,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811714373] [2023-01-28 11:43:36,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811714373] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:43:36,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68128076] [2023-01-28 11:43:36,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:43:36,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:43:36,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:43:36,221 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 11:43:36,249 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 11:43:36,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:43:36,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:43:36,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 46 conjunts are in the unsatisfiable core [2023-01-28 11:43:36,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:43:36,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:43:36,975 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 19 treesize of output 21 [2023-01-28 11:43:37,169 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-01-28 11:43:37,170 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 24 treesize of output 10 [2023-01-28 11:43:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:37,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:43:37,297 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_827 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_827) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2023-01-28 11:43:37,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:43:37,321 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 44 treesize of output 37 [2023-01-28 11:43:37,326 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 10 treesize of output 3 [2023-01-28 11:43:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-01-28 11:43:37,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68128076] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:43:37,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:43:37,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 11:43:37,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135192756] [2023-01-28 11:43:37,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:43:37,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 11:43:37,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:43:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 11:43:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1715, Unknown=1, NotChecked=84, Total=1980 [2023-01-28 11:43:37,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 11:43:37,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 311 transitions, 5968 flow. Second operand has 45 states, 45 states have (on average 68.46666666666667) internal successors, (3081), 45 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:37,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:43:37,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 11:43:37,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:43:40,550 INFO L130 PetriNetUnfolder]: 3587/6704 cut-off events. [2023-01-28 11:43:40,550 INFO L131 PetriNetUnfolder]: For 68893/68893 co-relation queries the response was YES. [2023-01-28 11:43:40,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37990 conditions, 6704 events. 3587/6704 cut-off events. For 68893/68893 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50035 event pairs, 1306 based on Foata normal form. 1/6705 useless extension candidates. Maximal degree in co-relation 37907. Up to 5763 conditions per place. [2023-01-28 11:43:40,597 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 309 selfloop transitions, 39 changer transitions 41/389 dead transitions. [2023-01-28 11:43:40,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 389 transitions, 7205 flow [2023-01-28 11:43:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 11:43:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 11:43:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1316 transitions. [2023-01-28 11:43:40,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3263888888888889 [2023-01-28 11:43:40,598 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1316 transitions. [2023-01-28 11:43:40,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1316 transitions. [2023-01-28 11:43:40,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:43:40,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1316 transitions. [2023-01-28 11:43:40,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 73.11111111111111) internal successors, (1316), 18 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:40,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:40,602 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:40,602 INFO L175 Difference]: Start difference. First operand has 423 places, 311 transitions, 5968 flow. Second operand 18 states and 1316 transitions. [2023-01-28 11:43:40,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 389 transitions, 7205 flow [2023-01-28 11:43:41,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 389 transitions, 6816 flow, removed 50 selfloop flow, removed 47 redundant places. [2023-01-28 11:43:41,029 INFO L231 Difference]: Finished difference. Result has 217 places, 312 transitions, 5715 flow [2023-01-28 11:43:41,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5715, PETRI_PLACES=217, PETRI_TRANSITIONS=312} [2023-01-28 11:43:41,030 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 198 predicate places. [2023-01-28 11:43:41,030 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 312 transitions, 5715 flow [2023-01-28 11:43:41,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 68.46666666666667) internal successors, (3081), 45 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:41,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:43:41,031 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:43:41,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 11:43:41,235 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 11:43:41,236 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 11:43:41,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:43:41,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1678853779, now seen corresponding path program 22 times [2023-01-28 11:43:41,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:43:41,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131097110] [2023-01-28 11:43:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:43:41,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:43:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:43:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:41,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:43:41,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131097110] [2023-01-28 11:43:41,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131097110] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:43:41,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533346064] [2023-01-28 11:43:41,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:43:41,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:43:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:43:41,800 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 11:43:41,801 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 11:43:41,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:43:41,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:43:41,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 11:43:41,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:43:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:43:42,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:43:42,146 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:43:42,147 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 25 treesize of output 13 [2023-01-28 11:43:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-01-28 11:43:42,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533346064] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:43:42,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:43:42,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 26 [2023-01-28 11:43:42,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549709353] [2023-01-28 11:43:42,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:43:42,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 11:43:42,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:43:42,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 11:43:42,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2023-01-28 11:43:42,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:43:42,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 312 transitions, 5715 flow. Second operand has 28 states, 28 states have (on average 72.71428571428571) internal successors, (2036), 28 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:42,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:43:42,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:43:42,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:43:44,998 INFO L130 PetriNetUnfolder]: 5114/9477 cut-off events. [2023-01-28 11:43:44,998 INFO L131 PetriNetUnfolder]: For 87639/87639 co-relation queries the response was YES. [2023-01-28 11:43:45,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50988 conditions, 9477 events. 5114/9477 cut-off events. For 87639/87639 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 73948 event pairs, 342 based on Foata normal form. 18/9495 useless extension candidates. Maximal degree in co-relation 50924. Up to 5212 conditions per place. [2023-01-28 11:43:45,055 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 227 selfloop transitions, 419 changer transitions 249/895 dead transitions. [2023-01-28 11:43:45,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 895 transitions, 12331 flow [2023-01-28 11:43:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-01-28 11:43:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-01-28 11:43:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5617 transitions. [2023-01-28 11:43:45,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35318158953722334 [2023-01-28 11:43:45,058 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5617 transitions. [2023-01-28 11:43:45,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5617 transitions. [2023-01-28 11:43:45,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:43:45,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5617 transitions. [2023-01-28 11:43:45,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 79.11267605633803) internal successors, (5617), 71 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:45,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 224.0) internal successors, (16128), 72 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:45,069 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 224.0) internal successors, (16128), 72 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:45,069 INFO L175 Difference]: Start difference. First operand has 217 places, 312 transitions, 5715 flow. Second operand 71 states and 5617 transitions. [2023-01-28 11:43:45,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 895 transitions, 12331 flow [2023-01-28 11:43:45,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 895 transitions, 12061 flow, removed 85 selfloop flow, removed 15 redundant places. [2023-01-28 11:43:45,333 INFO L231 Difference]: Finished difference. Result has 287 places, 459 transitions, 9565 flow [2023-01-28 11:43:45,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5513, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=9565, PETRI_PLACES=287, PETRI_TRANSITIONS=459} [2023-01-28 11:43:45,334 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 268 predicate places. [2023-01-28 11:43:45,334 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 459 transitions, 9565 flow [2023-01-28 11:43:45,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 72.71428571428571) internal successors, (2036), 28 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:45,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:43:45,334 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:43:45,339 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 11:43:45,537 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 11:43:45,538 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 11:43:45,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:43:45,539 INFO L85 PathProgramCache]: Analyzing trace with hash -47311637, now seen corresponding path program 23 times [2023-01-28 11:43:45,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:43:45,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349982421] [2023-01-28 11:43:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:43:45,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:43:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:43:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:43:45,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:43:45,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349982421] [2023-01-28 11:43:45,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349982421] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:43:45,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163390608] [2023-01-28 11:43:45,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:43:45,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:43:45,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:43:45,703 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 11:43:45,706 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 11:43:45,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 11:43:45,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:43:45,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 11:43:45,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:43:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:43:45,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:43:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:43:45,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163390608] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:43:45,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:43:45,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10] total 17 [2023-01-28 11:43:45,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706737798] [2023-01-28 11:43:45,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:43:45,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 11:43:45,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:43:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 11:43:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2023-01-28 11:43:45,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 224 [2023-01-28 11:43:45,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 459 transitions, 9565 flow. Second operand has 18 states, 18 states have (on average 97.66666666666667) internal successors, (1758), 18 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:45,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:43:45,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 224 [2023-01-28 11:43:45,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:43:48,333 INFO L130 PetriNetUnfolder]: 8298/15272 cut-off events. [2023-01-28 11:43:48,333 INFO L131 PetriNetUnfolder]: For 157597/157597 co-relation queries the response was YES. [2023-01-28 11:43:48,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83022 conditions, 15272 events. 8298/15272 cut-off events. For 157597/157597 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 128476 event pairs, 1215 based on Foata normal form. 24/15296 useless extension candidates. Maximal degree in co-relation 82944. Up to 8430 conditions per place. [2023-01-28 11:43:48,447 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 198 selfloop transitions, 503 changer transitions 16/717 dead transitions. [2023-01-28 11:43:48,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 717 transitions, 15467 flow [2023-01-28 11:43:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 11:43:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 11:43:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 735 transitions. [2023-01-28 11:43:48,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-01-28 11:43:48,448 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 735 transitions. [2023-01-28 11:43:48,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 735 transitions. [2023-01-28 11:43:48,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:43:48,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 735 transitions. [2023-01-28 11:43:48,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.0) internal successors, (735), 7 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:48,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:48,449 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:48,449 INFO L175 Difference]: Start difference. First operand has 287 places, 459 transitions, 9565 flow. Second operand 7 states and 735 transitions. [2023-01-28 11:43:48,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 717 transitions, 15467 flow [2023-01-28 11:43:49,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 717 transitions, 15313 flow, removed 28 selfloop flow, removed 14 redundant places. [2023-01-28 11:43:49,115 INFO L231 Difference]: Finished difference. Result has 279 places, 659 transitions, 14335 flow [2023-01-28 11:43:49,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=9400, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14335, PETRI_PLACES=279, PETRI_TRANSITIONS=659} [2023-01-28 11:43:49,115 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 260 predicate places. [2023-01-28 11:43:49,116 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 659 transitions, 14335 flow [2023-01-28 11:43:49,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 97.66666666666667) internal successors, (1758), 18 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:49,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:43:49,116 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:43:49,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-28 11:43:49,320 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 11:43:49,320 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 11:43:49,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:43:49,321 INFO L85 PathProgramCache]: Analyzing trace with hash -493421391, now seen corresponding path program 24 times [2023-01-28 11:43:49,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:43:49,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382645399] [2023-01-28 11:43:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:43:49,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:43:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:43:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:50,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:43:50,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382645399] [2023-01-28 11:43:50,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382645399] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:43:50,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283777041] [2023-01-28 11:43:50,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:43:50,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:43:50,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:43:50,268 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 11:43:50,268 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 11:43:50,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 11:43:50,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:43:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 11:43:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:43:50,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:43:50,729 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 19 treesize of output 21 [2023-01-28 11:43:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:43:50,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:43:50,864 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_962 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_962) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2023-01-28 11:43:50,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:43:50,871 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 44 treesize of output 37 [2023-01-28 11:43:50,873 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 10 treesize of output 3 [2023-01-28 11:43:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:43:51,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283777041] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:43:51,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:43:51,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 11] total 36 [2023-01-28 11:43:51,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675248589] [2023-01-28 11:43:51,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:43:51,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 11:43:51,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:43:51,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 11:43:51,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1241, Unknown=1, NotChecked=70, Total=1406 [2023-01-28 11:43:51,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 11:43:51,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 659 transitions, 14335 flow. Second operand has 38 states, 38 states have (on average 68.36842105263158) internal successors, (2598), 38 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:51,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:43:51,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 11:43:51,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:43:56,067 INFO L130 PetriNetUnfolder]: 10069/18386 cut-off events. [2023-01-28 11:43:56,068 INFO L131 PetriNetUnfolder]: For 194169/194169 co-relation queries the response was YES. [2023-01-28 11:43:56,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105322 conditions, 18386 events. 10069/18386 cut-off events. For 194169/194169 co-relation queries the response was YES. Maximal size of possible extension queue 1075. Compared 158008 event pairs, 1001 based on Foata normal form. 6/18392 useless extension candidates. Maximal degree in co-relation 105244. Up to 10163 conditions per place. [2023-01-28 11:43:56,210 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 170 selfloop transitions, 738 changer transitions 80/988 dead transitions. [2023-01-28 11:43:56,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 988 transitions, 19976 flow [2023-01-28 11:43:56,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 11:43:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 11:43:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2225 transitions. [2023-01-28 11:43:56,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33110119047619047 [2023-01-28 11:43:56,212 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2225 transitions. [2023-01-28 11:43:56,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2225 transitions. [2023-01-28 11:43:56,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:43:56,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2225 transitions. [2023-01-28 11:43:56,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 74.16666666666667) internal successors, (2225), 30 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:56,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 224.0) internal successors, (6944), 31 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:56,216 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 224.0) internal successors, (6944), 31 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:56,216 INFO L175 Difference]: Start difference. First operand has 279 places, 659 transitions, 14335 flow. Second operand 30 states and 2225 transitions. [2023-01-28 11:43:56,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 988 transitions, 19976 flow [2023-01-28 11:43:57,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 988 transitions, 19705 flow, removed 39 selfloop flow, removed 7 redundant places. [2023-01-28 11:43:57,238 INFO L231 Difference]: Finished difference. Result has 284 places, 795 transitions, 18111 flow [2023-01-28 11:43:57,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=14108, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=602, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=18111, PETRI_PLACES=284, PETRI_TRANSITIONS=795} [2023-01-28 11:43:57,238 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 265 predicate places. [2023-01-28 11:43:57,239 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 795 transitions, 18111 flow [2023-01-28 11:43:57,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 68.36842105263158) internal successors, (2598), 38 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:57,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:43:57,239 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:43:57,243 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 11:43:57,443 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 11:43:57,444 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 11:43:57,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:43:57,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2086186457, now seen corresponding path program 25 times [2023-01-28 11:43:57,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:43:57,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524999804] [2023-01-28 11:43:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:43:57,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:43:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:43:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:58,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:43:58,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524999804] [2023-01-28 11:43:58,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524999804] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:43:58,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363914558] [2023-01-28 11:43:58,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:43:58,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:43:58,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:43:58,054 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 11:43:58,055 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 11:43:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:43:58,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 11:43:58,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:43:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:58,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:43:58,700 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:43:58,700 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 25 treesize of output 13 [2023-01-28 11:43:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:43:59,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363914558] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:43:59,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:43:59,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-01-28 11:43:59,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696754297] [2023-01-28 11:43:59,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:43:59,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-28 11:43:59,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:43:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-28 11:43:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2023-01-28 11:43:59,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:43:59,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 795 transitions, 18111 flow. Second operand has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:43:59,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:43:59,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:43:59,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:44:29,634 INFO L130 PetriNetUnfolder]: 27959/50937 cut-off events. [2023-01-28 11:44:29,634 INFO L131 PetriNetUnfolder]: For 581326/581326 co-relation queries the response was YES. [2023-01-28 11:44:29,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281621 conditions, 50937 events. 27959/50937 cut-off events. For 581326/581326 co-relation queries the response was YES. Maximal size of possible extension queue 2425. Compared 491635 event pairs, 1022 based on Foata normal form. 74/51011 useless extension candidates. Maximal degree in co-relation 281546. Up to 28080 conditions per place. [2023-01-28 11:44:30,105 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 1785 selfloop transitions, 2353 changer transitions 585/4723 dead transitions. [2023-01-28 11:44:30,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 4723 transitions, 72590 flow [2023-01-28 11:44:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 348 states. [2023-01-28 11:44:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2023-01-28 11:44:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 27640 transitions. [2023-01-28 11:44:30,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35457717569786534 [2023-01-28 11:44:30,141 INFO L72 ComplementDD]: Start complementDD. Operand 348 states and 27640 transitions. [2023-01-28 11:44:30,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 348 states and 27640 transitions. [2023-01-28 11:44:30,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:44:30,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 348 states and 27640 transitions. [2023-01-28 11:44:30,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 349 states, 348 states have (on average 79.42528735632185) internal successors, (27640), 348 states have internal predecessors, (27640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:30,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 349 states, 349 states have (on average 224.0) internal successors, (78176), 349 states have internal predecessors, (78176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:30,236 INFO L81 ComplementDD]: Finished complementDD. Result has 349 states, 349 states have (on average 224.0) internal successors, (78176), 349 states have internal predecessors, (78176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:30,236 INFO L175 Difference]: Start difference. First operand has 284 places, 795 transitions, 18111 flow. Second operand 348 states and 27640 transitions. [2023-01-28 11:44:30,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 4723 transitions, 72590 flow [2023-01-28 11:44:33,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 4723 transitions, 70096 flow, removed 1047 selfloop flow, removed 13 redundant places. [2023-01-28 11:44:33,592 INFO L231 Difference]: Finished difference. Result has 704 places, 2536 transitions, 50386 flow [2023-01-28 11:44:33,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=17898, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=772, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=348, PETRI_FLOW=50386, PETRI_PLACES=704, PETRI_TRANSITIONS=2536} [2023-01-28 11:44:33,593 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 685 predicate places. [2023-01-28 11:44:33,593 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 2536 transitions, 50386 flow [2023-01-28 11:44:33,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:33,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:44:33,594 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:44:33,598 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 11:44:33,798 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 11:44:33,798 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 11:44:33,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:44:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1051818535, now seen corresponding path program 26 times [2023-01-28 11:44:33,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:44:33,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786279353] [2023-01-28 11:44:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:44:33,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:44:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:44:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:44:34,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:44:34,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786279353] [2023-01-28 11:44:34,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786279353] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:44:34,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372521438] [2023-01-28 11:44:34,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:44:34,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:44:34,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:44:34,338 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 11:44:34,340 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 11:44:34,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:44:34,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:44:34,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 11:44:34,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:44:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:44:35,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:44:35,047 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:44:35,047 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 24 treesize of output 11 [2023-01-28 11:44:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:44:35,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372521438] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:44:35,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:44:35,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-01-28 11:44:35,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840299731] [2023-01-28 11:44:35,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:44:35,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-28 11:44:35,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:44:35,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-28 11:44:35,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=2087, Unknown=0, NotChecked=0, Total=2550 [2023-01-28 11:44:35,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:44:35,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 2536 transitions, 50386 flow. Second operand has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:35,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:44:35,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:44:35,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:44:50,883 INFO L130 PetriNetUnfolder]: 13930/26111 cut-off events. [2023-01-28 11:44:50,883 INFO L131 PetriNetUnfolder]: For 556088/556088 co-relation queries the response was YES. [2023-01-28 11:44:51,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164643 conditions, 26111 events. 13930/26111 cut-off events. For 556088/556088 co-relation queries the response was YES. Maximal size of possible extension queue 1517. Compared 243281 event pairs, 1125 based on Foata normal form. 757/26868 useless extension candidates. Maximal degree in co-relation 164482. Up to 14134 conditions per place. [2023-01-28 11:44:51,229 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 540 selfloop transitions, 919 changer transitions 290/1749 dead transitions. [2023-01-28 11:44:51,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 1749 transitions, 38081 flow [2023-01-28 11:44:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-01-28 11:44:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-01-28 11:44:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 6878 transitions. [2023-01-28 11:44:51,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3529351395730706 [2023-01-28 11:44:51,257 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 6878 transitions. [2023-01-28 11:44:51,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 6878 transitions. [2023-01-28 11:44:51,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:44:51,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 6878 transitions. [2023-01-28 11:44:51,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 79.05747126436782) internal successors, (6878), 87 states have internal predecessors, (6878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:51,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 224.0) internal successors, (19712), 88 states have internal predecessors, (19712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:51,271 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 224.0) internal successors, (19712), 88 states have internal predecessors, (19712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:51,271 INFO L175 Difference]: Start difference. First operand has 704 places, 2536 transitions, 50386 flow. Second operand 87 states and 6878 transitions. [2023-01-28 11:44:51,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 1749 transitions, 38081 flow [2023-01-28 11:44:55,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 1749 transitions, 35974 flow, removed 1027 selfloop flow, removed 71 redundant places. [2023-01-28 11:44:55,160 INFO L231 Difference]: Finished difference. Result has 502 places, 1209 transitions, 30536 flow [2023-01-28 11:44:55,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=26036, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=803, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=30536, PETRI_PLACES=502, PETRI_TRANSITIONS=1209} [2023-01-28 11:44:55,161 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 483 predicate places. [2023-01-28 11:44:55,161 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1209 transitions, 30536 flow [2023-01-28 11:44:55,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:44:55,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:44:55,162 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:44:55,168 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 11:44:55,366 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 11:44:55,366 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 11:44:55,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:44:55,366 INFO L85 PathProgramCache]: Analyzing trace with hash -20180601, now seen corresponding path program 27 times [2023-01-28 11:44:55,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:44:55,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893466251] [2023-01-28 11:44:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:44:55,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:44:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:44:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:44:55,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:44:55,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893466251] [2023-01-28 11:44:55,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893466251] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:44:55,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757723781] [2023-01-28 11:44:55,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:44:55,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:44:55,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:44:55,880 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 11:44:55,883 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 11:44:56,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 11:44:56,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:44:56,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-28 11:44:56,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:44:56,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:44:56,408 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 11:44:56,438 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 11:44:56,789 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:44:56,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-28 11:44:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:44:56,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:45:00,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:45:00,503 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 60 treesize of output 48 [2023-01-28 11:45:00,512 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:45:00,512 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 300 treesize of output 271 [2023-01-28 11:45:00,544 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:45:00,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 80 [2023-01-28 11:45:00,559 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 11:45:00,560 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 91 treesize of output 67 [2023-01-28 11:45:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:45:00,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757723781] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:45:00,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:45:00,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 51 [2023-01-28 11:45:00,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243676325] [2023-01-28 11:45:00,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:45:00,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-01-28 11:45:00,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:45:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-01-28 11:45:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=2307, Unknown=8, NotChecked=0, Total=2756 [2023-01-28 11:45:00,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 224 [2023-01-28 11:45:00,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 1209 transitions, 30536 flow. Second operand has 53 states, 53 states have (on average 65.41509433962264) internal successors, (3467), 53 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 11:45:00,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:45:00,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 224 [2023-01-28 11:45:00,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:45:29,117 INFO L130 PetriNetUnfolder]: 31074/58277 cut-off events. [2023-01-28 11:45:29,117 INFO L131 PetriNetUnfolder]: For 918314/918314 co-relation queries the response was YES. [2023-01-28 11:45:29,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384237 conditions, 58277 events. 31074/58277 cut-off events. For 918314/918314 co-relation queries the response was YES. Maximal size of possible extension queue 2503. Compared 582482 event pairs, 7204 based on Foata normal form. 421/58698 useless extension candidates. Maximal degree in co-relation 384117. Up to 31822 conditions per place. [2023-01-28 11:45:30,029 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 666 selfloop transitions, 87 changer transitions 2697/3450 dead transitions. [2023-01-28 11:45:30,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 3450 transitions, 85587 flow [2023-01-28 11:45:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-01-28 11:45:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-01-28 11:45:30,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 6151 transitions. [2023-01-28 11:45:30,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3193002491694352 [2023-01-28 11:45:30,033 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 6151 transitions. [2023-01-28 11:45:30,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 6151 transitions. [2023-01-28 11:45:30,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:45:30,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 6151 transitions. [2023-01-28 11:45:30,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 71.52325581395348) internal successors, (6151), 86 states have internal predecessors, (6151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:45:30,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 224.0) internal successors, (19488), 87 states have internal predecessors, (19488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:45:30,046 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 224.0) internal successors, (19488), 87 states have internal predecessors, (19488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:45:30,046 INFO L175 Difference]: Start difference. First operand has 502 places, 1209 transitions, 30536 flow. Second operand 86 states and 6151 transitions. [2023-01-28 11:45:30,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 3450 transitions, 85587 flow [2023-01-28 11:45:46,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 3450 transitions, 83783 flow, removed 569 selfloop flow, removed 33 redundant places. [2023-01-28 11:45:46,072 INFO L231 Difference]: Finished difference. Result has 573 places, 664 transitions, 17397 flow [2023-01-28 11:45:46,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=26515, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=968, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=17397, PETRI_PLACES=573, PETRI_TRANSITIONS=664} [2023-01-28 11:45:46,073 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 554 predicate places. [2023-01-28 11:45:46,073 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 664 transitions, 17397 flow [2023-01-28 11:45:46,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 65.41509433962264) internal successors, (3467), 53 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 11:45:46,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:45:46,074 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:45:46,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 11:45:46,278 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 11:45:46,278 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 11:45:46,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:45:46,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1081015687, now seen corresponding path program 28 times [2023-01-28 11:45:46,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:45:46,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747860787] [2023-01-28 11:45:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:45:46,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:45:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:45:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:45:46,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:45:46,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747860787] [2023-01-28 11:45:46,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747860787] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:45:46,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729458828] [2023-01-28 11:45:46,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:45:46,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:45:46,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:45:46,791 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 11:45:46,791 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 11:45:46,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:45:46,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:45:46,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 11:45:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:45:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:45:47,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:45:47,446 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:45:47,446 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 25 treesize of output 13 [2023-01-28 11:45:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:45:47,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729458828] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:45:47,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:45:47,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-01-28 11:45:47,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122681902] [2023-01-28 11:45:47,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:45:47,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-28 11:45:47,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:45:47,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-28 11:45:47,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=2124, Unknown=0, NotChecked=0, Total=2550 [2023-01-28 11:45:47,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:45:47,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 664 transitions, 17397 flow. Second operand has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:45:47,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:45:47,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:45:47,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:45:55,689 INFO L130 PetriNetUnfolder]: 9250/17137 cut-off events. [2023-01-28 11:45:55,689 INFO L131 PetriNetUnfolder]: For 462921/462921 co-relation queries the response was YES. [2023-01-28 11:45:55,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113455 conditions, 17137 events. 9250/17137 cut-off events. For 462921/462921 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 144944 event pairs, 794 based on Foata normal form. 28/17165 useless extension candidates. Maximal degree in co-relation 113311. Up to 9454 conditions per place. [2023-01-28 11:45:55,858 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 512 selfloop transitions, 589 changer transitions 193/1294 dead transitions. [2023-01-28 11:45:55,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 1294 transitions, 28538 flow [2023-01-28 11:45:55,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-01-28 11:45:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2023-01-28 11:45:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 6324 transitions. [2023-01-28 11:45:55,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3529017857142857 [2023-01-28 11:45:55,862 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 6324 transitions. [2023-01-28 11:45:55,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 6324 transitions. [2023-01-28 11:45:55,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:45:55,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 6324 transitions. [2023-01-28 11:45:55,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 79.05) internal successors, (6324), 80 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:45:55,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 224.0) internal successors, (18144), 81 states have internal predecessors, (18144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:45:55,875 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 224.0) internal successors, (18144), 81 states have internal predecessors, (18144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:45:55,875 INFO L175 Difference]: Start difference. First operand has 573 places, 664 transitions, 17397 flow. Second operand 80 states and 6324 transitions. [2023-01-28 11:45:55,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 1294 transitions, 28538 flow [2023-01-28 11:45:58,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1294 transitions, 24109 flow, removed 1346 selfloop flow, removed 106 redundant places. [2023-01-28 11:45:58,670 INFO L231 Difference]: Finished difference. Result has 428 places, 786 transitions, 18132 flow [2023-01-28 11:45:58,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=14764, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=18132, PETRI_PLACES=428, PETRI_TRANSITIONS=786} [2023-01-28 11:45:58,670 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 409 predicate places. [2023-01-28 11:45:58,671 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 786 transitions, 18132 flow [2023-01-28 11:45:58,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:45:58,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:45:58,671 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:45:58,683 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 11:45:58,876 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 11:45:58,876 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 11:45:58,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:45:58,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1986127399, now seen corresponding path program 29 times [2023-01-28 11:45:58,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:45:58,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403479989] [2023-01-28 11:45:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:45:58,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:45:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:45:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:45:59,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:45:59,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403479989] [2023-01-28 11:45:59,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403479989] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:45:59,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417005770] [2023-01-28 11:45:59,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:45:59,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:45:59,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:45:59,437 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 11:45:59,438 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 11:45:59,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 11:45:59,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:45:59,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 11:45:59,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:46:00,084 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:46:00,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-28 11:46:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:46:00,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:46:00,185 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:46:00,185 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 25 treesize of output 13 [2023-01-28 11:46:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:46:00,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417005770] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:46:00,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:46:00,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-01-28 11:46:00,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797883475] [2023-01-28 11:46:00,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:46:00,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-28 11:46:00,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:46:00,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-28 11:46:00,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2023-01-28 11:46:00,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:46:00,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 786 transitions, 18132 flow. Second operand has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:00,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:46:00,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:46:00,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:46:06,518 INFO L130 PetriNetUnfolder]: 9130/16899 cut-off events. [2023-01-28 11:46:06,518 INFO L131 PetriNetUnfolder]: For 276705/276705 co-relation queries the response was YES. [2023-01-28 11:46:06,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105950 conditions, 16899 events. 9130/16899 cut-off events. For 276705/276705 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 143430 event pairs, 3385 based on Foata normal form. 1/16900 useless extension candidates. Maximal degree in co-relation 105839. Up to 15156 conditions per place. [2023-01-28 11:46:06,670 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 737 selfloop transitions, 40 changer transitions 160/937 dead transitions. [2023-01-28 11:46:06,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 937 transitions, 20840 flow [2023-01-28 11:46:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 11:46:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 11:46:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2326 transitions. [2023-01-28 11:46:06,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3461309523809524 [2023-01-28 11:46:06,672 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2326 transitions. [2023-01-28 11:46:06,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2326 transitions. [2023-01-28 11:46:06,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:46:06,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2326 transitions. [2023-01-28 11:46:06,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 77.53333333333333) internal successors, (2326), 30 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:06,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 224.0) internal successors, (6944), 31 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:06,676 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 224.0) internal successors, (6944), 31 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:06,676 INFO L175 Difference]: Start difference. First operand has 428 places, 786 transitions, 18132 flow. Second operand 30 states and 2326 transitions. [2023-01-28 11:46:06,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 937 transitions, 20840 flow [2023-01-28 11:46:08,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 937 transitions, 19401 flow, removed 193 selfloop flow, removed 36 redundant places. [2023-01-28 11:46:08,486 INFO L231 Difference]: Finished difference. Result has 411 places, 750 transitions, 16098 flow [2023-01-28 11:46:08,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=16697, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=16098, PETRI_PLACES=411, PETRI_TRANSITIONS=750} [2023-01-28 11:46:08,488 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 392 predicate places. [2023-01-28 11:46:08,488 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 750 transitions, 16098 flow [2023-01-28 11:46:08,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:08,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:46:08,489 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:46:08,495 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 11:46:08,693 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 11:46:08,694 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 11:46:08,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:46:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash 882289853, now seen corresponding path program 30 times [2023-01-28 11:46:08,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:46:08,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937894180] [2023-01-28 11:46:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:46:08,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:46:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:46:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:46:09,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:46:09,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937894180] [2023-01-28 11:46:09,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937894180] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:46:09,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239645404] [2023-01-28 11:46:09,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:46:09,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:46:09,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:46:09,358 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 11:46:09,360 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 11:46:09,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 11:46:09,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:46:09,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 11:46:09,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:46:10,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:46:10,143 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 19 treesize of output 21 [2023-01-28 11:46:10,422 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-01-28 11:46:10,422 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 24 treesize of output 10 [2023-01-28 11:46:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:46:10,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:46:10,595 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1243 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1243) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))) is different from false [2023-01-28 11:46:10,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:46:10,607 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 44 treesize of output 37 [2023-01-28 11:46:10,612 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 10 treesize of output 3 [2023-01-28 11:46:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-01-28 11:46:11,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239645404] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:46:11,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:46:11,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-01-28 11:46:11,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972730032] [2023-01-28 11:46:11,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:46:11,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-01-28 11:46:11,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:46:11,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-01-28 11:46:11,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2485, Unknown=1, NotChecked=102, Total=2862 [2023-01-28 11:46:11,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 11:46:11,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 750 transitions, 16098 flow. Second operand has 54 states, 54 states have (on average 68.38888888888889) internal successors, (3693), 54 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:11,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:46:11,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 11:46:11,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:46:16,903 INFO L130 PetriNetUnfolder]: 8766/16129 cut-off events. [2023-01-28 11:46:16,904 INFO L131 PetriNetUnfolder]: For 250664/250664 co-relation queries the response was YES. [2023-01-28 11:46:16,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97729 conditions, 16129 events. 8766/16129 cut-off events. For 250664/250664 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 135283 event pairs, 3366 based on Foata normal form. 1/16130 useless extension candidates. Maximal degree in co-relation 97617. Up to 15156 conditions per place. [2023-01-28 11:46:17,016 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 713 selfloop transitions, 30 changer transitions 90/833 dead transitions. [2023-01-28 11:46:17,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 833 transitions, 18140 flow [2023-01-28 11:46:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 11:46:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 11:46:17,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1456 transitions. [2023-01-28 11:46:17,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.325 [2023-01-28 11:46:17,018 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1456 transitions. [2023-01-28 11:46:17,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1456 transitions. [2023-01-28 11:46:17,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:46:17,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1456 transitions. [2023-01-28 11:46:17,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 72.8) internal successors, (1456), 20 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:17,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 224.0) internal successors, (4704), 21 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:17,021 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 224.0) internal successors, (4704), 21 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:17,021 INFO L175 Difference]: Start difference. First operand has 411 places, 750 transitions, 16098 flow. Second operand 20 states and 1456 transitions. [2023-01-28 11:46:17,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 833 transitions, 18140 flow [2023-01-28 11:46:18,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 833 transitions, 17969 flow, removed 4 selfloop flow, removed 24 redundant places. [2023-01-28 11:46:18,409 INFO L231 Difference]: Finished difference. Result has 365 places, 738 transitions, 15779 flow [2023-01-28 11:46:18,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=15927, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15779, PETRI_PLACES=365, PETRI_TRANSITIONS=738} [2023-01-28 11:46:18,410 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 346 predicate places. [2023-01-28 11:46:18,410 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 738 transitions, 15779 flow [2023-01-28 11:46:18,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 68.38888888888889) internal successors, (3693), 54 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:18,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:46:18,411 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:46:18,416 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 11:46:18,615 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 11:46:18,616 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 11:46:18,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:46:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash 263586920, now seen corresponding path program 31 times [2023-01-28 11:46:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:46:18,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845572363] [2023-01-28 11:46:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:46:18,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:46:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:46:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:46:19,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:46:19,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845572363] [2023-01-28 11:46:19,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845572363] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:46:19,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245686326] [2023-01-28 11:46:19,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:46:19,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:46:19,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:46:19,376 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 11:46:19,378 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 11:46:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:46:19,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 11:46:19,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:46:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:46:19,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:46:19,863 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:46:19,864 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 25 treesize of output 13 [2023-01-28 11:46:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-01-28 11:46:19,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245686326] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:46:19,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:46:19,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 10] total 32 [2023-01-28 11:46:19,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104686633] [2023-01-28 11:46:19,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:46:19,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 11:46:19,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:46:19,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 11:46:19,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 11:46:19,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:46:19,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 738 transitions, 15779 flow. Second operand has 34 states, 34 states have (on average 72.58823529411765) internal successors, (2468), 34 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:19,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:46:19,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:46:19,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:46:28,166 INFO L130 PetriNetUnfolder]: 13337/24315 cut-off events. [2023-01-28 11:46:28,166 INFO L131 PetriNetUnfolder]: For 401286/401286 co-relation queries the response was YES. [2023-01-28 11:46:28,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143225 conditions, 24315 events. 13337/24315 cut-off events. For 401286/401286 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 214984 event pairs, 723 based on Foata normal form. 54/24369 useless extension candidates. Maximal degree in co-relation 143116. Up to 13443 conditions per place. [2023-01-28 11:46:28,402 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 378 selfloop transitions, 1175 changer transitions 365/1918 dead transitions. [2023-01-28 11:46:28,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 1918 transitions, 32940 flow [2023-01-28 11:46:28,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-01-28 11:46:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2023-01-28 11:46:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 8153 transitions. [2023-01-28 11:46:28,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.353372052704577 [2023-01-28 11:46:28,406 INFO L72 ComplementDD]: Start complementDD. Operand 103 states and 8153 transitions. [2023-01-28 11:46:28,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 8153 transitions. [2023-01-28 11:46:28,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:46:28,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 103 states and 8153 transitions. [2023-01-28 11:46:28,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 104 states, 103 states have (on average 79.15533980582525) internal successors, (8153), 103 states have internal predecessors, (8153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:28,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 104 states, 104 states have (on average 224.0) internal successors, (23296), 104 states have internal predecessors, (23296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:28,425 INFO L81 ComplementDD]: Finished complementDD. Result has 104 states, 104 states have (on average 224.0) internal successors, (23296), 104 states have internal predecessors, (23296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:28,425 INFO L175 Difference]: Start difference. First operand has 365 places, 738 transitions, 15779 flow. Second operand 103 states and 8153 transitions. [2023-01-28 11:46:28,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 1918 transitions, 32940 flow [2023-01-28 11:46:29,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1918 transitions, 32020 flow, removed 273 selfloop flow, removed 19 redundant places. [2023-01-28 11:46:30,004 INFO L231 Difference]: Finished difference. Result has 441 places, 1223 transitions, 28462 flow [2023-01-28 11:46:30,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=15219, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=690, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=28462, PETRI_PLACES=441, PETRI_TRANSITIONS=1223} [2023-01-28 11:46:30,005 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 422 predicate places. [2023-01-28 11:46:30,005 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1223 transitions, 28462 flow [2023-01-28 11:46:30,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 72.58823529411765) internal successors, (2468), 34 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:30,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:46:30,006 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:46:30,011 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 11:46:30,210 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 11:46:30,211 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 11:46:30,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:46:30,211 INFO L85 PathProgramCache]: Analyzing trace with hash 436178500, now seen corresponding path program 32 times [2023-01-28 11:46:30,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:46:30,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015690332] [2023-01-28 11:46:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:46:30,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:46:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:46:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:46:31,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:46:31,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015690332] [2023-01-28 11:46:31,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015690332] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:46:31,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113070725] [2023-01-28 11:46:31,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:46:31,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:46:31,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:46:31,349 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 11:46:31,350 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 11:46:31,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:46:31,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:46:31,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-28 11:46:31,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:46:31,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:46:31,836 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 19 treesize of output 21 [2023-01-28 11:46:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:46:32,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:46:32,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:46:32,090 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 44 treesize of output 37 [2023-01-28 11:46:32,107 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 10 treesize of output 3 [2023-01-28 11:46:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 11:46:32,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113070725] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:46:32,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:46:32,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 13] total 43 [2023-01-28 11:46:32,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597583235] [2023-01-28 11:46:32,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:46:32,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 11:46:32,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:46:32,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 11:46:32,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1846, Unknown=1, NotChecked=0, Total=1980 [2023-01-28 11:46:32,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 11:46:32,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1223 transitions, 28462 flow. Second operand has 45 states, 45 states have (on average 68.42222222222222) internal successors, (3079), 45 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:32,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:46:32,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 11:46:32,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:46:43,640 INFO L130 PetriNetUnfolder]: 17197/31312 cut-off events. [2023-01-28 11:46:43,641 INFO L131 PetriNetUnfolder]: For 392200/392200 co-relation queries the response was YES. [2023-01-28 11:46:43,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192067 conditions, 31312 events. 17197/31312 cut-off events. For 392200/392200 co-relation queries the response was YES. Maximal size of possible extension queue 1638. Compared 286410 event pairs, 1205 based on Foata normal form. 1/31313 useless extension candidates. Maximal degree in co-relation 191949. Up to 17305 conditions per place. [2023-01-28 11:46:44,023 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 160 selfloop transitions, 1521 changer transitions 99/1780 dead transitions. [2023-01-28 11:46:44,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 1780 transitions, 39997 flow [2023-01-28 11:46:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 11:46:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 11:46:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2672 transitions. [2023-01-28 11:46:44,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33134920634920634 [2023-01-28 11:46:44,025 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2672 transitions. [2023-01-28 11:46:44,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2672 transitions. [2023-01-28 11:46:44,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:46:44,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2672 transitions. [2023-01-28 11:46:44,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 74.22222222222223) internal successors, (2672), 36 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:44,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 224.0) internal successors, (8288), 37 states have internal predecessors, (8288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:44,031 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 224.0) internal successors, (8288), 37 states have internal predecessors, (8288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:44,031 INFO L175 Difference]: Start difference. First operand has 441 places, 1223 transitions, 28462 flow. Second operand 36 states and 2672 transitions. [2023-01-28 11:46:44,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 1780 transitions, 39997 flow [2023-01-28 11:46:47,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1780 transitions, 39842 flow, removed 40 selfloop flow, removed 15 redundant places. [2023-01-28 11:46:47,176 INFO L231 Difference]: Finished difference. Result has 462 places, 1570 transitions, 38212 flow [2023-01-28 11:46:47,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=28311, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=38212, PETRI_PLACES=462, PETRI_TRANSITIONS=1570} [2023-01-28 11:46:47,183 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 443 predicate places. [2023-01-28 11:46:47,183 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 1570 transitions, 38212 flow [2023-01-28 11:46:47,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 68.42222222222222) internal successors, (3079), 45 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:47,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:46:47,184 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:46:47,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-28 11:46:47,389 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 11:46:47,389 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 11:46:47,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:46:47,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1192271129, now seen corresponding path program 33 times [2023-01-28 11:46:47,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:46:47,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675642691] [2023-01-28 11:46:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:46:47,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:46:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:46:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 11:46:47,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:46:47,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675642691] [2023-01-28 11:46:47,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675642691] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:46:47,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208899141] [2023-01-28 11:46:47,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:46:47,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:46:47,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:46:47,506 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 11:46:47,544 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 11:46:47,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 11:46:47,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:46:47,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 11:46:48,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:46:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 11:46:48,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:46:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-28 11:46:48,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208899141] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:46:48,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:46:48,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 12] total 20 [2023-01-28 11:46:48,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352280727] [2023-01-28 11:46:48,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:46:48,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 11:46:48,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:46:48,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 11:46:48,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2023-01-28 11:46:48,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 224 [2023-01-28 11:46:48,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1570 transitions, 38212 flow. Second operand has 21 states, 21 states have (on average 97.61904761904762) internal successors, (2050), 21 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:46:48,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:46:48,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 224 [2023-01-28 11:46:48,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:47:06,354 INFO L130 PetriNetUnfolder]: 27959/50844 cut-off events. [2023-01-28 11:47:06,355 INFO L131 PetriNetUnfolder]: For 721094/721094 co-relation queries the response was YES. [2023-01-28 11:47:07,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310351 conditions, 50844 events. 27959/50844 cut-off events. For 721094/721094 co-relation queries the response was YES. Maximal size of possible extension queue 2699. Compared 497662 event pairs, 3383 based on Foata normal form. 18/50862 useless extension candidates. Maximal degree in co-relation 310232. Up to 28099 conditions per place. [2023-01-28 11:47:07,109 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 487 selfloop transitions, 1864 changer transitions 0/2351 dead transitions. [2023-01-28 11:47:07,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 2351 transitions, 60493 flow [2023-01-28 11:47:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 11:47:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 11:47:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 841 transitions. [2023-01-28 11:47:07,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693080357142857 [2023-01-28 11:47:07,110 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 841 transitions. [2023-01-28 11:47:07,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 841 transitions. [2023-01-28 11:47:07,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:47:07,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 841 transitions. [2023-01-28 11:47:07,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.125) internal successors, (841), 8 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:47:07,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 224.0) internal successors, (2016), 9 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:47:07,111 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 224.0) internal successors, (2016), 9 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:47:07,111 INFO L175 Difference]: Start difference. First operand has 462 places, 1570 transitions, 38212 flow. Second operand 8 states and 841 transitions. [2023-01-28 11:47:07,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 2351 transitions, 60493 flow [2023-01-28 11:47:13,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 2351 transitions, 60194 flow, removed 56 selfloop flow, removed 15 redundant places. [2023-01-28 11:47:13,612 INFO L231 Difference]: Finished difference. Result has 455 places, 2301 transitions, 59292 flow [2023-01-28 11:47:13,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=38011, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=59292, PETRI_PLACES=455, PETRI_TRANSITIONS=2301} [2023-01-28 11:47:13,614 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 436 predicate places. [2023-01-28 11:47:13,614 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 2301 transitions, 59292 flow [2023-01-28 11:47:13,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.61904761904762) internal successors, (2050), 21 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:47:13,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:47:13,614 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:47:13,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 11:47:13,818 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 11:47:13,818 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 11:47:13,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:47:13,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1620776276, now seen corresponding path program 34 times [2023-01-28 11:47:13,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:47:13,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043577134] [2023-01-28 11:47:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:47:13,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:47:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:47:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:47:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:47:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043577134] [2023-01-28 11:47:14,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043577134] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:47:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818613305] [2023-01-28 11:47:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:47:14,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:47:14,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:47:14,385 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 11:47:14,387 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 11:47:14,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:47:14,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:47:14,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 11:47:14,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:47:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:47:15,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:47:15,182 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:47:15,182 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 25 treesize of output 13 [2023-01-28 11:47:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:47:15,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818613305] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:47:15,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:47:15,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2023-01-28 11:47:15,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726954216] [2023-01-28 11:47:15,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:47:15,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-01-28 11:47:15,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:47:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-01-28 11:47:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=3036, Unknown=0, NotChecked=0, Total=3540 [2023-01-28 11:47:15,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:47:15,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 2301 transitions, 59292 flow. Second operand has 60 states, 60 states have (on average 72.26666666666667) internal successors, (4336), 60 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:47:15,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:47:15,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:47:15,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:48:07,448 INFO L130 PetriNetUnfolder]: 46330/86499 cut-off events. [2023-01-28 11:48:07,448 INFO L131 PetriNetUnfolder]: For 1592186/1592186 co-relation queries the response was YES. [2023-01-28 11:48:08,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535413 conditions, 86499 events. 46330/86499 cut-off events. For 1592186/1592186 co-relation queries the response was YES. Maximal size of possible extension queue 4640. Compared 926721 event pairs, 2925 based on Foata normal form. 2691/89190 useless extension candidates. Maximal degree in co-relation 535293. Up to 46584 conditions per place. [2023-01-28 11:48:08,809 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 1643 selfloop transitions, 3434 changer transitions 784/5861 dead transitions. [2023-01-28 11:48:08,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 5861 transitions, 128593 flow [2023-01-28 11:48:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2023-01-28 11:48:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2023-01-28 11:48:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 20900 transitions. [2023-01-28 11:48:08,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3547664312873438 [2023-01-28 11:48:08,819 INFO L72 ComplementDD]: Start complementDD. Operand 263 states and 20900 transitions. [2023-01-28 11:48:08,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 263 states and 20900 transitions. [2023-01-28 11:48:08,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:48:08,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 263 states and 20900 transitions. [2023-01-28 11:48:08,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 264 states, 263 states have (on average 79.46768060836501) internal successors, (20900), 263 states have internal predecessors, (20900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:08,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 264 states, 264 states have (on average 224.0) internal successors, (59136), 264 states have internal predecessors, (59136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:09,007 INFO L81 ComplementDD]: Finished complementDD. Result has 264 states, 264 states have (on average 224.0) internal successors, (59136), 264 states have internal predecessors, (59136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:09,007 INFO L175 Difference]: Start difference. First operand has 455 places, 2301 transitions, 59292 flow. Second operand 263 states and 20900 transitions. [2023-01-28 11:48:09,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 5861 transitions, 128593 flow [2023-01-28 11:48:28,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 5861 transitions, 127605 flow, removed 494 selfloop flow, removed 0 redundant places. [2023-01-28 11:48:28,869 INFO L231 Difference]: Finished difference. Result has 793 places, 3902 transitions, 98250 flow [2023-01-28 11:48:28,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=58606, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=263, PETRI_FLOW=98250, PETRI_PLACES=793, PETRI_TRANSITIONS=3902} [2023-01-28 11:48:28,871 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 774 predicate places. [2023-01-28 11:48:28,871 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 3902 transitions, 98250 flow [2023-01-28 11:48:28,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 72.26666666666667) internal successors, (4336), 60 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:28,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:48:28,871 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:48:28,879 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 11:48:29,076 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 11:48:29,076 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 11:48:29,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:48:29,077 INFO L85 PathProgramCache]: Analyzing trace with hash 67733728, now seen corresponding path program 35 times [2023-01-28 11:48:29,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:48:29,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787374909] [2023-01-28 11:48:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:48:29,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:48:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:48:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:48:29,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:48:29,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787374909] [2023-01-28 11:48:29,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787374909] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:48:29,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95496239] [2023-01-28 11:48:29,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:48:29,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:48:29,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:48:29,921 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 11:48:29,958 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 11:48:30,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 11:48:30,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:48:30,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 11:48:30,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:48:30,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:48:30,387 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 11:48:30,425 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 11:48:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:48:30,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:48:31,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:48:31,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-01-28 11:48:31,575 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:48:31,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 283 [2023-01-28 11:48:31,584 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:48:31,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 82 [2023-01-28 11:48:31,593 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 11:48:31,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 67 [2023-01-28 11:48:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:48:31,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95496239] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:48:31,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:48:31,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 60 [2023-01-28 11:48:31,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279401921] [2023-01-28 11:48:31,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:48:31,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-01-28 11:48:31,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:48:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-01-28 11:48:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=3359, Unknown=4, NotChecked=0, Total=3782 [2023-01-28 11:48:31,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 224 [2023-01-28 11:48:31,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 3902 transitions, 98250 flow. Second operand has 62 states, 62 states have (on average 65.35483870967742) internal successors, (4052), 62 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:48:31,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:48:31,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 224 [2023-01-28 11:48:31,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:48:40,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:50:24,812 INFO L130 PetriNetUnfolder]: 60632/113864 cut-off events. [2023-01-28 11:50:24,812 INFO L131 PetriNetUnfolder]: For 3820108/3820108 co-relation queries the response was YES. [2023-01-28 11:50:27,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741456 conditions, 113864 events. 60632/113864 cut-off events. For 3820108/3820108 co-relation queries the response was YES. Maximal size of possible extension queue 5805. Compared 1268504 event pairs, 16137 based on Foata normal form. 328/114192 useless extension candidates. Maximal degree in co-relation 741259. Up to 63111 conditions per place. [2023-01-28 11:50:28,187 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 3744 selfloop transitions, 2675 changer transitions 711/7130 dead transitions. [2023-01-28 11:50:28,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1031 places, 7130 transitions, 163935 flow [2023-01-28 11:50:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2023-01-28 11:50:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2023-01-28 11:50:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 18594 transitions. [2023-01-28 11:50:28,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3204977937120794 [2023-01-28 11:50:28,198 INFO L72 ComplementDD]: Start complementDD. Operand 259 states and 18594 transitions. [2023-01-28 11:50:28,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 259 states and 18594 transitions. [2023-01-28 11:50:28,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:50:28,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 259 states and 18594 transitions. [2023-01-28 11:50:28,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 260 states, 259 states have (on average 71.7915057915058) internal successors, (18594), 259 states have internal predecessors, (18594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:50:28,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 260 states, 260 states have (on average 224.0) internal successors, (58240), 260 states have internal predecessors, (58240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:50:28,248 INFO L81 ComplementDD]: Finished complementDD. Result has 260 states, 260 states have (on average 224.0) internal successors, (58240), 260 states have internal predecessors, (58240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:50:28,248 INFO L175 Difference]: Start difference. First operand has 793 places, 3902 transitions, 98250 flow. Second operand 259 states and 18594 transitions. [2023-01-28 11:50:28,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1031 places, 7130 transitions, 163935 flow [2023-01-28 11:51:39,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1011 places, 7130 transitions, 161917 flow, removed 981 selfloop flow, removed 20 redundant places. [2023-01-28 11:51:39,488 INFO L231 Difference]: Finished difference. Result has 1083 places, 5531 transitions, 142626 flow [2023-01-28 11:51:39,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=94327, PETRI_DIFFERENCE_MINUEND_PLACES=753, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2032, PETRI_DIFFERENCE_SUBTRAHEND_STATES=259, PETRI_FLOW=142626, PETRI_PLACES=1083, PETRI_TRANSITIONS=5531} [2023-01-28 11:51:39,495 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1064 predicate places. [2023-01-28 11:51:39,495 INFO L495 AbstractCegarLoop]: Abstraction has has 1083 places, 5531 transitions, 142626 flow [2023-01-28 11:51:39,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 65.35483870967742) internal successors, (4052), 62 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:51:39,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:51:39,496 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:51:39,504 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 11:51:39,701 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 11:51:39,701 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 11:51:39,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:51:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1467556480, now seen corresponding path program 36 times [2023-01-28 11:51:39,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:51:39,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730495074] [2023-01-28 11:51:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:51:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:51:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:51:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:51:40,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:51:40,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730495074] [2023-01-28 11:51:40,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730495074] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:51:40,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277112603] [2023-01-28 11:51:40,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:51:40,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:51:40,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:51:40,430 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 11:51:40,430 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 11:51:40,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-28 11:51:40,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:51:40,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 11:51:40,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:51:41,348 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:51:41,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-28 11:51:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:51:41,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:51:41,428 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:51:41,429 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 24 treesize of output 11 [2023-01-28 11:51:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:51:42,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277112603] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:51:42,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:51:42,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 50 [2023-01-28 11:51:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630396131] [2023-01-28 11:51:42,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:51:42,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-01-28 11:51:42,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:51:42,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-01-28 11:51:42,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2287, Unknown=0, NotChecked=0, Total=2652 [2023-01-28 11:51:42,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:51:42,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1083 places, 5531 transitions, 142626 flow. Second operand has 52 states, 52 states have (on average 72.5) internal successors, (3770), 52 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:51:42,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:51:42,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:51:42,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:53:05,585 INFO L130 PetriNetUnfolder]: 30582/57328 cut-off events. [2023-01-28 11:53:05,585 INFO L131 PetriNetUnfolder]: For 1747335/1747335 co-relation queries the response was YES. [2023-01-28 11:53:07,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393444 conditions, 57328 events. 30582/57328 cut-off events. For 1747335/1747335 co-relation queries the response was YES. Maximal size of possible extension queue 2925. Compared 585025 event pairs, 8809 based on Foata normal form. 1296/58624 useless extension candidates. Maximal degree in co-relation 393174. Up to 38736 conditions per place. [2023-01-28 11:53:07,827 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 1908 selfloop transitions, 147 changer transitions 1274/3329 dead transitions. [2023-01-28 11:53:07,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1106 places, 3329 transitions, 84440 flow [2023-01-28 11:53:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-01-28 11:53:07,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2023-01-28 11:53:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 8156 transitions. [2023-01-28 11:53:07,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35010302197802196 [2023-01-28 11:53:07,831 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 8156 transitions. [2023-01-28 11:53:07,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 8156 transitions. [2023-01-28 11:53:07,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:53:07,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 8156 transitions. [2023-01-28 11:53:07,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 78.42307692307692) internal successors, (8156), 104 states have internal predecessors, (8156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:53:07,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 224.0) internal successors, (23520), 105 states have internal predecessors, (23520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:53:07,847 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 224.0) internal successors, (23520), 105 states have internal predecessors, (23520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:53:07,847 INFO L175 Difference]: Start difference. First operand has 1083 places, 5531 transitions, 142626 flow. Second operand 104 states and 8156 transitions. [2023-01-28 11:53:07,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1106 places, 3329 transitions, 84440 flow [2023-01-28 11:53:40,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 983 places, 3329 transitions, 81110 flow, removed 484 selfloop flow, removed 123 redundant places. [2023-01-28 11:53:40,926 INFO L231 Difference]: Finished difference. Result has 1012 places, 1968 transitions, 47238 flow [2023-01-28 11:53:40,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=64850, PETRI_DIFFERENCE_MINUEND_PLACES=880, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=47238, PETRI_PLACES=1012, PETRI_TRANSITIONS=1968} [2023-01-28 11:53:40,929 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 993 predicate places. [2023-01-28 11:53:40,929 INFO L495 AbstractCegarLoop]: Abstraction has has 1012 places, 1968 transitions, 47238 flow [2023-01-28 11:53:40,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 72.5) internal successors, (3770), 52 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:53:40,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:53:40,929 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:53:40,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-01-28 11:53:41,133 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 11:53:41,134 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 11:53:41,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:53:41,134 INFO L85 PathProgramCache]: Analyzing trace with hash -533247616, now seen corresponding path program 37 times [2023-01-28 11:53:41,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:53:41,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997071545] [2023-01-28 11:53:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:53:41,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:53:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:53:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:53:41,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:53:41,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997071545] [2023-01-28 11:53:41,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997071545] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:53:41,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268919710] [2023-01-28 11:53:41,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:53:41,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:53:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:53:41,800 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 11:53:41,802 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 11:53:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:53:41,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 11:53:41,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:53:42,612 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:53:42,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-28 11:53:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:53:42,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:53:42,696 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:53:42,697 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 25 treesize of output 13 [2023-01-28 11:53:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:53:43,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268919710] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:53:43,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:53:43,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2023-01-28 11:53:43,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855992971] [2023-01-28 11:53:43,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:53:43,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-01-28 11:53:43,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:53:43,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-01-28 11:53:43,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3099, Unknown=0, NotChecked=0, Total=3540 [2023-01-28 11:53:43,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:53:43,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1012 places, 1968 transitions, 47238 flow. Second operand has 60 states, 60 states have (on average 72.4) internal successors, (4344), 60 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:53:43,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:53:43,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:53:43,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:07,815 INFO L130 PetriNetUnfolder]: 22820/41904 cut-off events. [2023-01-28 11:54:07,816 INFO L131 PetriNetUnfolder]: For 1156214/1156214 co-relation queries the response was YES. [2023-01-28 11:54:09,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273647 conditions, 41904 events. 22820/41904 cut-off events. For 1156214/1156214 co-relation queries the response was YES. Maximal size of possible extension queue 2049. Compared 398300 event pairs, 8785 based on Foata normal form. 1/41905 useless extension candidates. Maximal degree in co-relation 273392. Up to 38736 conditions per place. [2023-01-28 11:54:09,468 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 1920 selfloop transitions, 121 changer transitions 141/2182 dead transitions. [2023-01-28 11:54:09,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 855 places, 2182 transitions, 53102 flow [2023-01-28 11:54:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 11:54:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 11:54:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3183 transitions. [2023-01-28 11:54:09,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465810104529617 [2023-01-28 11:54:09,470 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3183 transitions. [2023-01-28 11:54:09,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3183 transitions. [2023-01-28 11:54:09,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:09,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3183 transitions. [2023-01-28 11:54:09,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 77.63414634146342) internal successors, (3183), 41 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:09,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 224.0) internal successors, (9408), 42 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:09,477 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 224.0) internal successors, (9408), 42 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:09,477 INFO L175 Difference]: Start difference. First operand has 1012 places, 1968 transitions, 47238 flow. Second operand 41 states and 3183 transitions. [2023-01-28 11:54:09,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 855 places, 2182 transitions, 53102 flow [2023-01-28 11:54:26,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 715 places, 2182 transitions, 49585 flow, removed 319 selfloop flow, removed 140 redundant places. [2023-01-28 11:54:26,285 INFO L231 Difference]: Finished difference. Result has 716 places, 1955 transitions, 43869 flow [2023-01-28 11:54:26,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=43809, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1968, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1847, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=43869, PETRI_PLACES=716, PETRI_TRANSITIONS=1955} [2023-01-28 11:54:26,286 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 697 predicate places. [2023-01-28 11:54:26,286 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 1955 transitions, 43869 flow [2023-01-28 11:54:26,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 72.4) internal successors, (4344), 60 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:26,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:54:26,287 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:54:26,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-28 11:54:26,492 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 11:54:26,493 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 11:54:26,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:54:26,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1755411680, now seen corresponding path program 38 times [2023-01-28 11:54:26,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:54:26,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045646385] [2023-01-28 11:54:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:54:26,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:54:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:54:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:54:27,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:54:27,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045646385] [2023-01-28 11:54:27,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045646385] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:54:27,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554690451] [2023-01-28 11:54:27,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:54:27,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:54:27,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:54:27,032 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 11:54:27,033 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 11:54:27,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:54:27,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:54:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 11:54:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:54:27,752 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:54:27,753 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 23 treesize of output 10 [2023-01-28 11:54:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:54:27,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:54:27,881 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:54:27,881 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 25 treesize of output 13 [2023-01-28 11:54:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:54:28,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554690451] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:54:28,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:54:28,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2023-01-28 11:54:28,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618522199] [2023-01-28 11:54:28,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:54:28,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-01-28 11:54:28,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:54:28,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-01-28 11:54:28,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=3018, Unknown=0, NotChecked=0, Total=3540 [2023-01-28 11:54:28,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:54:28,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 716 places, 1955 transitions, 43869 flow. Second operand has 60 states, 60 states have (on average 72.4) internal successors, (4344), 60 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:28,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:54:28,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:54:28,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:54:49,237 INFO L130 PetriNetUnfolder]: 22690/41643 cut-off events. [2023-01-28 11:54:49,237 INFO L131 PetriNetUnfolder]: For 915394/915394 co-relation queries the response was YES. [2023-01-28 11:54:50,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259312 conditions, 41643 events. 22690/41643 cut-off events. For 915394/915394 co-relation queries the response was YES. Maximal size of possible extension queue 2059. Compared 395568 event pairs, 8829 based on Foata normal form. 1/41644 useless extension candidates. Maximal degree in co-relation 259133. Up to 38736 conditions per place. [2023-01-28 11:54:50,152 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 1905 selfloop transitions, 103 changer transitions 137/2145 dead transitions. [2023-01-28 11:54:50,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 2145 transitions, 49471 flow [2023-01-28 11:54:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 11:54:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 11:54:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2871 transitions. [2023-01-28 11:54:50,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34640444015444016 [2023-01-28 11:54:50,154 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2871 transitions. [2023-01-28 11:54:50,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2871 transitions. [2023-01-28 11:54:50,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:54:50,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2871 transitions. [2023-01-28 11:54:50,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 77.5945945945946) internal successors, (2871), 37 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:50,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 224.0) internal successors, (8512), 38 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:50,298 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 224.0) internal successors, (8512), 38 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:54:50,298 INFO L175 Difference]: Start difference. First operand has 716 places, 1955 transitions, 43869 flow. Second operand 37 states and 2871 transitions. [2023-01-28 11:54:50,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 2145 transitions, 49471 flow [2023-01-28 11:55:01,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 2145 transitions, 49213 flow, removed 3 selfloop flow, removed 42 redundant places. [2023-01-28 11:55:01,518 INFO L231 Difference]: Finished difference. Result has 704 places, 1936 transitions, 43552 flow [2023-01-28 11:55:01,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=43615, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=43552, PETRI_PLACES=704, PETRI_TRANSITIONS=1936} [2023-01-28 11:55:01,520 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 685 predicate places. [2023-01-28 11:55:01,520 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 1936 transitions, 43552 flow [2023-01-28 11:55:01,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 72.4) internal successors, (4344), 60 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:55:01,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:55:01,521 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:55:01,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-28 11:55:01,726 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 11:55:01,727 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 11:55:01,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:55:01,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1438359328, now seen corresponding path program 39 times [2023-01-28 11:55:01,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:55:01,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775852087] [2023-01-28 11:55:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:55:01,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:55:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:55:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:55:02,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:55:02,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775852087] [2023-01-28 11:55:02,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775852087] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:55:02,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340440407] [2023-01-28 11:55:02,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:55:02,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:55:02,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:55:02,314 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 11:55:02,315 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 11:55:02,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 11:55:02,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:55:02,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 11:55:02,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:55:03,401 INFO L321 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-01-28 11:55:03,401 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 45 treesize of output 16 [2023-01-28 11:55:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:55:03,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:55:03,701 INFO L321 Elim1Store]: treesize reduction 39, result has 29.1 percent of original size [2023-01-28 11:55:03,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 31 [2023-01-28 11:55:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 7 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:55:04,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340440407] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:55:04,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:55:04,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 54 [2023-01-28 11:55:04,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050600992] [2023-01-28 11:55:04,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:55:04,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-01-28 11:55:04,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:55:04,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-01-28 11:55:04,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=2477, Unknown=0, NotChecked=0, Total=3080 [2023-01-28 11:55:04,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 11:55:04,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 1936 transitions, 43552 flow. Second operand has 56 states, 56 states have (on average 72.46428571428571) internal successors, (4058), 56 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:55:04,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:55:04,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 11:55:04,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 11:55:21,406 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 11:55:21,448 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 11:55:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 11:55:21,928 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 11:55:21,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-01-28 11:55:22,133 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 11:55:22,134 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (56states, 71/224 universal loopers) in iteration 42,while PetriNetUnfolder was constructing finite prefix that currently has 216676 conditions, 34320 events (19383/34319 cut-off events. For 447499/447499 co-relation queries the response was YES. Maximal size of possible extension queue 2042. Compared 321078 event pairs, 7548 based on Foata normal form. 2/35679 useless extension candidates. Maximal degree in co-relation 216497. Up to 31762 conditions per place.). [2023-01-28 11:55:22,135 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 11:55:22,135 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 11:55:22,135 INFO L445 BasicCegarLoop]: Path program histogram: [39, 1, 1, 1] [2023-01-28 11:55:22,137 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 11:55:22,137 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 11:55:22,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 11:55:22 BasicIcfg [2023-01-28 11:55:22,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 11:55:22,140 INFO L158 Benchmark]: Toolchain (without parser) took 797069.65ms. Allocated memory was 622.9MB in the beginning and 12.8GB in the end (delta: 12.1GB). Free memory was 573.5MB in the beginning and 10.6GB in the end (delta: -10.1GB). Peak memory consumption was 6.7GB. Max. memory is 16.0GB. [2023-01-28 11:55:22,140 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 358.6MB. Free memory is still 308.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 11:55:22,140 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.52ms. Allocated memory is still 622.9MB. Free memory was 573.5MB in the beginning and 562.2MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 11:55:22,140 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.89ms. Allocated memory is still 622.9MB. Free memory was 562.2MB in the beginning and 560.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:55:22,141 INFO L158 Benchmark]: Boogie Preprocessor took 20.49ms. Allocated memory is still 622.9MB. Free memory was 560.5MB in the beginning and 558.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:55:22,141 INFO L158 Benchmark]: RCFGBuilder took 360.11ms. Allocated memory is still 622.9MB. Free memory was 558.8MB in the beginning and 538.2MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-28 11:55:22,141 INFO L158 Benchmark]: TraceAbstraction took 796503.89ms. Allocated memory was 622.9MB in the beginning and 12.8GB in the end (delta: 12.1GB). Free memory was 537.5MB in the beginning and 10.6GB in the end (delta: -10.1GB). Peak memory consumption was 6.7GB. Max. memory is 16.0GB. [2023-01-28 11:55:22,142 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 358.6MB. Free memory is still 308.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 158.52ms. Allocated memory is still 622.9MB. Free memory was 573.5MB in the beginning and 562.2MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.89ms. Allocated memory is still 622.9MB. Free memory was 562.2MB in the beginning and 560.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.49ms. Allocated memory is still 622.9MB. Free memory was 560.5MB in the beginning and 558.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 360.11ms. Allocated memory is still 622.9MB. Free memory was 558.8MB in the beginning and 538.2MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 796503.89ms. Allocated memory was 622.9MB in the beginning and 12.8GB in the end (delta: 12.1GB). Free memory was 537.5MB in the beginning and 10.6GB in the end (delta: -10.1GB). Peak memory consumption was 6.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 103 PlacesBefore, 19 PlacesAfterwards, 105 TransitionsBefore, 15 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 7 FixpointIterations, 65 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 6 ConcurrentYvCompositions, 6 ChoiceCompositions, 109 TotalNumberOfCompositions, 467 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 467, independent: 462, independent conditional: 0, independent unconditional: 462, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 258, independent: 257, independent conditional: 0, independent unconditional: 257, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 467, independent: 205, independent conditional: 0, independent unconditional: 205, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 258, unknown conditional: 0, unknown unconditional: 258] , Statistics on independence cache: Total cache size (in pairs): 14, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, 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: 86]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (56states, 71/224 universal loopers) in iteration 42,while PetriNetUnfolder was constructing finite prefix that currently has 216676 conditions, 34320 events (19383/34319 cut-off events. For 447499/447499 co-relation queries the response was YES. Maximal size of possible extension queue 2042. Compared 321078 event pairs, 7548 based on Foata normal form. 2/35679 useless extension candidates. Maximal degree in co-relation 216497. Up to 31762 conditions per place.). - TimeoutResultAtElement [Line: 81]: 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 (56states, 71/224 universal loopers) in iteration 42,while PetriNetUnfolder was constructing finite prefix that currently has 216676 conditions, 34320 events (19383/34319 cut-off events. For 447499/447499 co-relation queries the response was YES. Maximal size of possible extension queue 2042. Compared 321078 event pairs, 7548 based on Foata normal form. 2/35679 useless extension candidates. Maximal degree in co-relation 216497. Up to 31762 conditions per place.). - TimeoutResultAtElement [Line: 80]: 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 (56states, 71/224 universal loopers) in iteration 42,while PetriNetUnfolder was constructing finite prefix that currently has 216676 conditions, 34320 events (19383/34319 cut-off events. For 447499/447499 co-relation queries the response was YES. Maximal size of possible extension queue 2042. Compared 321078 event pairs, 7548 based on Foata normal form. 2/35679 useless extension candidates. Maximal degree in co-relation 216497. Up to 31762 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 125 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: 796.4s, OverallIterations: 42, TraceHistogramMax: 6, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.0s, AutomataDifference: 725.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 36 mSolverCounterUnknown, 26654 SdHoareTripleChecker+Valid, 47.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26654 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 42.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 828 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2400 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 95913 IncrementalHoareTripleChecker+Invalid, 99177 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2400 mSolverCounterUnsat, 0 mSDtfsCounter, 95913 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4516 GetRequests, 975 SyntacticMatches, 10 SemanticMatches, 3531 ConstructedPredicates, 7 IntricatePredicates, 3 DeprecatedPredicates, 174616 ImplicationChecksByTransitivity, 122.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142626occurred in iteration=38, InterpolantAutomatonStates: 2460, 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: 0.5s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 52.1s InterpolantComputationTime, 1889 NumberOfCodeBlocks, 1887 NumberOfCodeBlocksAsserted, 139 NumberOfCheckSat, 2694 ConstructedInterpolants, 165 QuantifiedInterpolants, 37673 SizeOfPredicates, 487 NumberOfNonLiveVariables, 9940 ConjunctsInSsa, 1419 ConjunctsInUnsatCore, 120 InterpolantComputations, 3 PerfectInterpolantSequences, 679/3795 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