/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 23:10:23,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 23:10:23,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 23:10:23,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 23:10:23,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 23:10:23,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 23:10:23,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 23:10:23,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 23:10:23,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 23:10:23,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 23:10:23,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 23:10:23,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 23:10:23,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 23:10:23,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 23:10:23,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 23:10:23,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 23:10:23,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 23:10:23,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 23:10:23,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 23:10:23,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 23:10:23,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 23:10:23,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 23:10:23,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 23:10:23,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 23:10:23,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 23:10:23,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 23:10:23,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 23:10:23,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 23:10:23,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 23:10:23,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 23:10:23,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 23:10:23,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 23:10:23,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 23:10:23,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 23:10:23,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 23:10:23,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 23:10:23,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 23:10:23,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 23:10:23,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 23:10:23,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 23:10:23,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 23:10:23,370 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 [2023-01-27 23:10:23,391 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 23:10:23,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 23:10:23,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 23:10:23,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 23:10:23,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 23:10:23,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 23:10:23,393 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 23:10:23,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 23:10:23,393 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 23:10:23,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 23:10:23,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 23:10:23,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 23:10:23,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 23:10:23,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 23:10:23,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 23:10:23,394 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 23:10:23,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 23:10:23,394 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 23:10:23,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 23:10:23,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 23:10:23,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 23:10:23,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 23:10:23,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 23:10:23,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:10:23,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 23:10:23,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 23:10:23,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 23:10:23,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 23:10:23,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 23:10:23,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 23:10:23,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 23:10:23,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 23:10:23,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 23:10:23,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 23:10:23,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 23:10:23,577 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 23:10:23,578 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 23:10:23,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-01-27 23:10:24,556 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 23:10:24,687 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 23:10:24,687 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-01-27 23:10:24,691 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9c43c94/69874075362847c5a2f035361748d846/FLAGbf870eddc [2023-01-27 23:10:24,701 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9c43c94/69874075362847c5a2f035361748d846 [2023-01-27 23:10:24,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 23:10:24,704 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 23:10:24,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 23:10:24,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 23:10:24,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 23:10:24,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63405812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24, skipping insertion in model container [2023-01-27 23:10:24,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 23:10:24,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 23:10:24,812 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/unroll-4.wvr.c[2572,2585] [2023-01-27 23:10:24,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:10:24,823 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 23:10:24,835 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/unroll-4.wvr.c[2572,2585] [2023-01-27 23:10:24,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:10:24,860 INFO L208 MainTranslator]: Completed translation [2023-01-27 23:10:24,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24 WrapperNode [2023-01-27 23:10:24,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 23:10:24,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 23:10:24,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 23:10:24,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 23:10:24,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,871 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,885 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 157 [2023-01-27 23:10:24,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 23:10:24,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 23:10:24,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 23:10:24,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 23:10:24,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,900 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 23:10:24,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 23:10:24,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 23:10:24,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 23:10:24,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (1/1) ... [2023-01-27 23:10:24,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:10:24,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:24,921 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) [2023-01-27 23:10:24,933 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 [2023-01-27 23:10:24,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 23:10:24,964 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 23:10:24,964 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 23:10:24,964 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 23:10:24,964 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 23:10:24,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 23:10:24,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 23:10:24,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 23:10:24,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 23:10:24,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 23:10:24,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 23:10:24,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 23:10:24,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 23:10:24,965 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 23:10:25,044 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 23:10:25,045 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 23:10:25,273 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 23:10:25,282 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 23:10:25,282 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 23:10:25,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:10:25 BoogieIcfgContainer [2023-01-27 23:10:25,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 23:10:25,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 23:10:25,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 23:10:25,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 23:10:25,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:10:24" (1/3) ... [2023-01-27 23:10:25,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d77d82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:10:25, skipping insertion in model container [2023-01-27 23:10:25,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:10:24" (2/3) ... [2023-01-27 23:10:25,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d77d82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:10:25, skipping insertion in model container [2023-01-27 23:10:25,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:10:25" (3/3) ... [2023-01-27 23:10:25,289 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2023-01-27 23:10:25,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 23:10:25,311 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 23:10:25,311 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 23:10:25,416 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 23:10:25,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 183 transitions, 382 flow [2023-01-27 23:10:25,495 INFO L130 PetriNetUnfolder]: 16/181 cut-off events. [2023-01-27 23:10:25,495 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:10:25,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 16/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 163 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-01-27 23:10:25,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 183 transitions, 382 flow [2023-01-27 23:10:25,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 173 transitions, 358 flow [2023-01-27 23:10:25,506 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 23:10:25,512 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 173 transitions, 358 flow [2023-01-27 23:10:25,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 173 transitions, 358 flow [2023-01-27 23:10:25,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 173 transitions, 358 flow [2023-01-27 23:10:25,541 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2023-01-27 23:10:25,542 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:10:25,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 173 events. 16/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 144 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-01-27 23:10:25,544 INFO L119 LiptonReduction]: Number of co-enabled transitions 3242 [2023-01-27 23:10:29,445 INFO L134 LiptonReduction]: Checked pairs total: 3238 [2023-01-27 23:10:29,446 INFO L136 LiptonReduction]: Total number of compositions: 210 [2023-01-27 23:10:29,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 23:10:29,492 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;@7279f801, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 23:10:29,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 23:10:29,498 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-27 23:10:29,498 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:10:29,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:29,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:29,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:29,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:29,504 INFO L85 PathProgramCache]: Analyzing trace with hash 924236132, now seen corresponding path program 1 times [2023-01-27 23:10:29,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:29,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61411917] [2023-01-27 23:10:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:29,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:29,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61411917] [2023-01-27 23:10:29,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61411917] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:10:29,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:10:29,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:10:29,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127872937] [2023-01-27 23:10:29,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:10:29,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:10:29,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:29,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:10:29,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:10:29,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 393 [2023-01-27 23:10:29,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:29,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:29,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 393 [2023-01-27 23:10:29,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:29,936 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-01-27 23:10:29,936 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 23:10:29,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 189 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-01-27 23:10:29,938 INFO L137 encePairwiseOnDemand]: 390/393 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-01-27 23:10:29,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-01-27 23:10:29,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:10:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:10:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-01-27 23:10:29,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40627650551314676 [2023-01-27 23:10:29,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-01-27 23:10:29,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-01-27 23:10:29,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:29,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-01-27 23:10:29,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:29,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:29,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:29,971 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 479 transitions. [2023-01-27 23:10:29,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-01-27 23:10:29,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 23:10:29,975 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-01-27 23:10:29,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-01-27 23:10:29,980 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-27 23:10:29,980 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-01-27 23:10:29,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:29,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:29,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:29,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 23:10:29,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:29,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:29,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1656557720, now seen corresponding path program 1 times [2023-01-27 23:10:29,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:29,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356417076] [2023-01-27 23:10:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:29,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:30,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:30,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356417076] [2023-01-27 23:10:30,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356417076] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:10:30,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:10:30,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 23:10:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477724667] [2023-01-27 23:10:30,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:10:30,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:10:30,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:30,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:10:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:10:30,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 393 [2023-01-27 23:10:30,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:30,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 393 [2023-01-27 23:10:30,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:30,190 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-01-27 23:10:30,190 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:10:30,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 317 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-01-27 23:10:30,193 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-01-27 23:10:30,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-01-27 23:10:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:10:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:10:30,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-01-27 23:10:30,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39609838846480067 [2023-01-27 23:10:30,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-01-27 23:10:30,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-01-27 23:10:30,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:30,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-01-27 23:10:30,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,198 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 467 transitions. [2023-01-27 23:10:30,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-01-27 23:10:30,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 23:10:30,199 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-01-27 23:10:30,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-01-27 23:10:30,200 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-01-27 23:10:30,200 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-01-27 23:10:30,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:30,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:30,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 23:10:30,201 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:30,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:30,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1844840923, now seen corresponding path program 1 times [2023-01-27 23:10:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:30,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592969053] [2023-01-27 23:10:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:30,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:30,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:30,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592969053] [2023-01-27 23:10:30,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592969053] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:10:30,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:10:30,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:10:30,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320093] [2023-01-27 23:10:30,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:10:30,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:10:30,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:30,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:10:30,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 23:10:30,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 393 [2023-01-27 23:10:30,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:30,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 393 [2023-01-27 23:10:30,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:30,372 INFO L130 PetriNetUnfolder]: 74/143 cut-off events. [2023-01-27 23:10:30,372 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-01-27 23:10:30,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 143 events. 74/143 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 469 event pairs, 15 based on Foata normal form. 8/150 useless extension candidates. Maximal degree in co-relation 330. Up to 83 conditions per place. [2023-01-27 23:10:30,373 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 29 selfloop transitions, 4 changer transitions 2/36 dead transitions. [2023-01-27 23:10:30,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 36 transitions, 180 flow [2023-01-27 23:10:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:10:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:10:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 652 transitions. [2023-01-27 23:10:30,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41475826972010177 [2023-01-27 23:10:30,375 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 652 transitions. [2023-01-27 23:10:30,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 652 transitions. [2023-01-27 23:10:30,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:30,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 652 transitions. [2023-01-27 23:10:30,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,379 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,379 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 4 states and 652 transitions. [2023-01-27 23:10:30,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 36 transitions, 180 flow [2023-01-27 23:10:30,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 36 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:10:30,381 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 89 flow [2023-01-27 23:10:30,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-01-27 23:10:30,382 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-01-27 23:10:30,384 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 89 flow [2023-01-27 23:10:30,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:30,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:30,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 23:10:30,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:30,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:30,385 INFO L85 PathProgramCache]: Analyzing trace with hash -338318067, now seen corresponding path program 1 times [2023-01-27 23:10:30,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:30,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609143297] [2023-01-27 23:10:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:30,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:30,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:30,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609143297] [2023-01-27 23:10:30,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609143297] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:10:30,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:10:30,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:10:30,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630075218] [2023-01-27 23:10:30,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:10:30,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:10:30,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:10:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:10:30,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 393 [2023-01-27 23:10:30,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:30,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 393 [2023-01-27 23:10:30,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:30,594 INFO L130 PetriNetUnfolder]: 93/182 cut-off events. [2023-01-27 23:10:30,594 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-01-27 23:10:30,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 182 events. 93/182 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 615 event pairs, 26 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 506. Up to 89 conditions per place. [2023-01-27 23:10:30,595 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 31 selfloop transitions, 7 changer transitions 11/49 dead transitions. [2023-01-27 23:10:30,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 49 transitions, 274 flow [2023-01-27 23:10:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 23:10:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 23:10:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 922 transitions. [2023-01-27 23:10:30,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39100932994062765 [2023-01-27 23:10:30,598 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 922 transitions. [2023-01-27 23:10:30,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 922 transitions. [2023-01-27 23:10:30,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:30,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 922 transitions. [2023-01-27 23:10:30,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 153.66666666666666) internal successors, (922), 6 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 393.0) internal successors, (2751), 7 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,603 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 393.0) internal successors, (2751), 7 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,603 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 89 flow. Second operand 6 states and 922 transitions. [2023-01-27 23:10:30,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 49 transitions, 274 flow [2023-01-27 23:10:30,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 264 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 23:10:30,605 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 126 flow [2023-01-27 23:10:30,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-01-27 23:10:30,606 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2023-01-27 23:10:30,606 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 126 flow [2023-01-27 23:10:30,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:30,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:30,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 23:10:30,607 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:30,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:30,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1252150367, now seen corresponding path program 2 times [2023-01-27 23:10:30,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:30,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78173414] [2023-01-27 23:10:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:30,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:30,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78173414] [2023-01-27 23:10:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78173414] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583214306] [2023-01-27 23:10:30,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:10:30,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:30,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:30,697 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) [2023-01-27 23:10:30,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 23:10:30,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:10:30,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 23:10:30,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:30,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:30,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583214306] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:30,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 23:10:30,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 7 [2023-01-27 23:10:30,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354943997] [2023-01-27 23:10:30,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:10:30,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:10:30,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:30,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:10:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-27 23:10:30,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 393 [2023-01-27 23:10:30,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:30,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:30,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 393 [2023-01-27 23:10:30,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:31,013 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-01-27 23:10:31,013 INFO L131 PetriNetUnfolder]: For 248/261 co-relation queries the response was YES. [2023-01-27 23:10:31,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 163 events. 85/163 cut-off events. For 248/261 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 501 event pairs, 16 based on Foata normal form. 19/179 useless extension candidates. Maximal degree in co-relation 561. Up to 106 conditions per place. [2023-01-27 23:10:31,014 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 29 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-01-27 23:10:31,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 262 flow [2023-01-27 23:10:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:10:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:10:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2023-01-27 23:10:31,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40076335877862596 [2023-01-27 23:10:31,016 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2023-01-27 23:10:31,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2023-01-27 23:10:31,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:31,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2023-01-27 23:10:31,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,020 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,020 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 126 flow. Second operand 4 states and 630 transitions. [2023-01-27 23:10:31,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 262 flow [2023-01-27 23:10:31,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 248 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-27 23:10:31,022 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 151 flow [2023-01-27 23:10:31,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-01-27 23:10:31,023 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-01-27 23:10:31,024 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 151 flow [2023-01-27 23:10:31,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:31,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:31,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 23:10:31,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:31,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:31,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:31,230 INFO L85 PathProgramCache]: Analyzing trace with hash 906879297, now seen corresponding path program 3 times [2023-01-27 23:10:31,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:31,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017721002] [2023-01-27 23:10:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:31,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:31,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:31,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017721002] [2023-01-27 23:10:31,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017721002] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:10:31,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:10:31,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:10:31,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164017785] [2023-01-27 23:10:31,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:10:31,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:10:31,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:31,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:10:31,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:10:31,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 393 [2023-01-27 23:10:31,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:31,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 393 [2023-01-27 23:10:31,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:31,411 INFO L130 PetriNetUnfolder]: 102/207 cut-off events. [2023-01-27 23:10:31,411 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2023-01-27 23:10:31,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 207 events. 102/207 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 714 event pairs, 36 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 737. Up to 129 conditions per place. [2023-01-27 23:10:31,412 INFO L137 encePairwiseOnDemand]: 388/393 looper letters, 34 selfloop transitions, 8 changer transitions 8/50 dead transitions. [2023-01-27 23:10:31,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 355 flow [2023-01-27 23:10:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:10:31,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:10:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 769 transitions. [2023-01-27 23:10:31,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39134860050890585 [2023-01-27 23:10:31,414 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 769 transitions. [2023-01-27 23:10:31,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 769 transitions. [2023-01-27 23:10:31,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:31,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 769 transitions. [2023-01-27 23:10:31,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.8) internal successors, (769), 5 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 393.0) internal successors, (2358), 6 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,418 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 393.0) internal successors, (2358), 6 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,418 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 151 flow. Second operand 5 states and 769 transitions. [2023-01-27 23:10:31,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 355 flow [2023-01-27 23:10:31,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 346 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-27 23:10:31,420 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 194 flow [2023-01-27 23:10:31,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2023-01-27 23:10:31,420 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-01-27 23:10:31,421 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 194 flow [2023-01-27 23:10:31,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:31,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:31,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 23:10:31,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:31,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:31,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1096563895, now seen corresponding path program 2 times [2023-01-27 23:10:31,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:31,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446760336] [2023-01-27 23:10:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:31,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:31,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:31,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446760336] [2023-01-27 23:10:31,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446760336] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:10:31,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:10:31,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:10:31,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391804282] [2023-01-27 23:10:31,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:10:31,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:10:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:31,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:10:31,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 23:10:31,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 393 [2023-01-27 23:10:31,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:31,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 393 [2023-01-27 23:10:31,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:31,565 INFO L130 PetriNetUnfolder]: 96/192 cut-off events. [2023-01-27 23:10:31,565 INFO L131 PetriNetUnfolder]: For 597/607 co-relation queries the response was YES. [2023-01-27 23:10:31,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 192 events. 96/192 cut-off events. For 597/607 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 643 event pairs, 31 based on Foata normal form. 13/199 useless extension candidates. Maximal degree in co-relation 800. Up to 130 conditions per place. [2023-01-27 23:10:31,566 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 28 selfloop transitions, 6 changer transitions 5/42 dead transitions. [2023-01-27 23:10:31,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 338 flow [2023-01-27 23:10:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:10:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:10:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 652 transitions. [2023-01-27 23:10:31,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41475826972010177 [2023-01-27 23:10:31,568 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 652 transitions. [2023-01-27 23:10:31,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 652 transitions. [2023-01-27 23:10:31,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:31,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 652 transitions. [2023-01-27 23:10:31,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,571 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,571 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 194 flow. Second operand 4 states and 652 transitions. [2023-01-27 23:10:31,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 338 flow [2023-01-27 23:10:31,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 313 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-01-27 23:10:31,573 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 213 flow [2023-01-27 23:10:31,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-01-27 23:10:31,574 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-01-27 23:10:31,574 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 213 flow [2023-01-27 23:10:31,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:31,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:31,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 23:10:31,574 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:31,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1118128293, now seen corresponding path program 4 times [2023-01-27 23:10:31,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:31,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616277550] [2023-01-27 23:10:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:31,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:31,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:31,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616277550] [2023-01-27 23:10:31,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616277550] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:31,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320523666] [2023-01-27 23:10:31,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:10:31,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:31,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:31,657 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) [2023-01-27 23:10:31,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 23:10:31,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:10:31,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 23:10:31,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:31,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:31,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320523666] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:31,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:31,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-01-27 23:10:31,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975347145] [2023-01-27 23:10:31,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:31,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 23:10:31,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:31,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 23:10:31,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-01-27 23:10:31,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 393 [2023-01-27 23:10:31,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 213 flow. Second operand has 10 states, 10 states have (on average 148.8) internal successors, (1488), 10 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:31,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 393 [2023-01-27 23:10:31,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:31,952 INFO L130 PetriNetUnfolder]: 125/231 cut-off events. [2023-01-27 23:10:31,952 INFO L131 PetriNetUnfolder]: For 749/749 co-relation queries the response was YES. [2023-01-27 23:10:31,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 231 events. 125/231 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 767 event pairs, 20 based on Foata normal form. 24/254 useless extension candidates. Maximal degree in co-relation 956. Up to 92 conditions per place. [2023-01-27 23:10:31,954 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 39 selfloop transitions, 25 changer transitions 9/73 dead transitions. [2023-01-27 23:10:31,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 582 flow [2023-01-27 23:10:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 23:10:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 23:10:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1382 transitions. [2023-01-27 23:10:31,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907266044670625 [2023-01-27 23:10:31,957 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1382 transitions. [2023-01-27 23:10:31,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1382 transitions. [2023-01-27 23:10:31,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:31,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1382 transitions. [2023-01-27 23:10:31,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.55555555555554) internal successors, (1382), 9 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 393.0) internal successors, (3930), 10 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,964 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 393.0) internal successors, (3930), 10 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,964 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 213 flow. Second operand 9 states and 1382 transitions. [2023-01-27 23:10:31,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 582 flow [2023-01-27 23:10:31,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 560 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-01-27 23:10:31,967 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 373 flow [2023-01-27 23:10:31,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-01-27 23:10:31,968 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2023-01-27 23:10:31,968 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 373 flow [2023-01-27 23:10:31,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.8) internal successors, (1488), 10 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:31,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:31,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:31,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 23:10:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-01-27 23:10:32,173 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:32,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:32,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1249714855, now seen corresponding path program 1 times [2023-01-27 23:10:32,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:32,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778479690] [2023-01-27 23:10:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:32,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:10:32,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:32,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778479690] [2023-01-27 23:10:32,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778479690] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:32,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797892814] [2023-01-27 23:10:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:32,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:32,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:32,319 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) [2023-01-27 23:10:32,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 23:10:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:32,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 23:10:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:32,434 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 [2023-01-27 23:10:32,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:10:32,479 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 [2023-01-27 23:10:32,603 INFO L321 Elim1Store]: treesize reduction 37, result has 64.8 percent of original size [2023-01-27 23:10:32,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 101 [2023-01-27 23:10:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:32,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:34,904 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x1~0 Int) (~x2~0 Int) (v_ArrVal_182 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_182) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* 4 (select .cse1 (+ (* (select .cse1 (+ c_~f~0.offset (* ~x2~0 4))) 4) c_~f~0.offset))))))) (or (< .cse0 0) (< ~x1~0 0) (<= c_~size~0 .cse0) (= (select .cse1 (+ (* ~x1~0 4) c_~f~0.offset)) (select .cse1 (+ c_~f~0.offset (* .cse0 4)))) (<= c_~size~0 ~x1~0))))) is different from false [2023-01-27 23:10:35,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:35,017 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 296 treesize of output 176 [2023-01-27 23:10:35,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:35,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 852 treesize of output 804 [2023-01-27 23:10:35,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:35,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 228 [2023-01-27 23:10:35,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:35,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 259 treesize of output 225 [2023-01-27 23:10:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:38,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797892814] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:38,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:38,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-01-27 23:10:38,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374336568] [2023-01-27 23:10:38,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:38,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 23:10:38,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:38,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 23:10:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=166, Unknown=1, NotChecked=26, Total=240 [2023-01-27 23:10:38,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 393 [2023-01-27 23:10:38,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 373 flow. Second operand has 16 states, 16 states have (on average 107.75) internal successors, (1724), 16 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:38,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:38,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 393 [2023-01-27 23:10:38,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:39,157 INFO L130 PetriNetUnfolder]: 275/487 cut-off events. [2023-01-27 23:10:39,157 INFO L131 PetriNetUnfolder]: For 1576/1596 co-relation queries the response was YES. [2023-01-27 23:10:39,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 487 events. 275/487 cut-off events. For 1576/1596 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1896 event pairs, 8 based on Foata normal form. 38/517 useless extension candidates. Maximal degree in co-relation 1976. Up to 249 conditions per place. [2023-01-27 23:10:39,160 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 75 selfloop transitions, 35 changer transitions 43/157 dead transitions. [2023-01-27 23:10:39,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 157 transitions, 1394 flow [2023-01-27 23:10:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 23:10:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 23:10:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2540 transitions. [2023-01-27 23:10:39,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2810045358999889 [2023-01-27 23:10:39,166 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2540 transitions. [2023-01-27 23:10:39,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2540 transitions. [2023-01-27 23:10:39,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:39,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2540 transitions. [2023-01-27 23:10:39,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 110.43478260869566) internal successors, (2540), 23 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:39,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:39,179 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:39,179 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 373 flow. Second operand 23 states and 2540 transitions. [2023-01-27 23:10:39,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 157 transitions, 1394 flow [2023-01-27 23:10:39,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 157 transitions, 1201 flow, removed 74 selfloop flow, removed 5 redundant places. [2023-01-27 23:10:39,186 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 573 flow [2023-01-27 23:10:39,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=573, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-27 23:10:39,186 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-01-27 23:10:39,186 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 573 flow [2023-01-27 23:10:39,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.75) internal successors, (1724), 16 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:39,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:39,187 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:39,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 23:10:39,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:39,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:39,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:39,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1302241712, now seen corresponding path program 2 times [2023-01-27 23:10:39,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:39,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003432792] [2023-01-27 23:10:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:39,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 23:10:39,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:39,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003432792] [2023-01-27 23:10:39,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003432792] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:39,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312824168] [2023-01-27 23:10:39,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:10:39,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:39,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:39,512 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) [2023-01-27 23:10:39,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 23:10:39,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:10:39,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:39,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 23:10:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:39,633 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 [2023-01-27 23:10:39,660 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 [2023-01-27 23:10:39,673 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 [2023-01-27 23:10:39,791 INFO L321 Elim1Store]: treesize reduction 41, result has 61.0 percent of original size [2023-01-27 23:10:39,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 97 [2023-01-27 23:10:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:40,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:40,307 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_216 (Array Int Int)) (~x1~0 Int) (~x2~0 Int)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) c_~f~0.base))) (let ((.cse1 (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* ~x2~0 4))) 4))) 4))))) (or (= (select .cse0 (+ (* ~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* .cse1 4)))) (<= c_~size~0 .cse1) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (< .cse1 0))))) is different from false [2023-01-27 23:10:42,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:42,403 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 296 treesize of output 176 [2023-01-27 23:10:42,474 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:42,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 852 treesize of output 804 [2023-01-27 23:10:42,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:42,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 228 [2023-01-27 23:10:42,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:42,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 259 treesize of output 225 [2023-01-27 23:10:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:45,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312824168] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:45,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:45,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-27 23:10:45,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639836219] [2023-01-27 23:10:45,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:45,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:10:45,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:10:45,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=192, Unknown=2, NotChecked=28, Total=272 [2023-01-27 23:10:45,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 393 [2023-01-27 23:10:45,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 573 flow. Second operand has 17 states, 17 states have (on average 107.88235294117646) internal successors, (1834), 17 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:45,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:45,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 393 [2023-01-27 23:10:45,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:46,273 INFO L130 PetriNetUnfolder]: 225/419 cut-off events. [2023-01-27 23:10:46,273 INFO L131 PetriNetUnfolder]: For 1945/1964 co-relation queries the response was YES. [2023-01-27 23:10:46,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 419 events. 225/419 cut-off events. For 1945/1964 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1635 event pairs, 4 based on Foata normal form. 43/460 useless extension candidates. Maximal degree in co-relation 2208. Up to 141 conditions per place. [2023-01-27 23:10:46,276 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 53 selfloop transitions, 24 changer transitions 55/136 dead transitions. [2023-01-27 23:10:46,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 136 transitions, 1265 flow [2023-01-27 23:10:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 23:10:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 23:10:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2094 transitions. [2023-01-27 23:10:46,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2804339092004821 [2023-01-27 23:10:46,280 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2094 transitions. [2023-01-27 23:10:46,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2094 transitions. [2023-01-27 23:10:46,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:46,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2094 transitions. [2023-01-27 23:10:46,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 110.21052631578948) internal successors, (2094), 19 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:46,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 393.0) internal successors, (7860), 20 states have internal predecessors, (7860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:46,290 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 393.0) internal successors, (7860), 20 states have internal predecessors, (7860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:46,290 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 573 flow. Second operand 19 states and 2094 transitions. [2023-01-27 23:10:46,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 136 transitions, 1265 flow [2023-01-27 23:10:46,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 1158 flow, removed 39 selfloop flow, removed 7 redundant places. [2023-01-27 23:10:46,297 INFO L231 Difference]: Finished difference. Result has 84 places, 49 transitions, 471 flow [2023-01-27 23:10:46,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=471, PETRI_PLACES=84, PETRI_TRANSITIONS=49} [2023-01-27 23:10:46,298 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 63 predicate places. [2023-01-27 23:10:46,298 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 49 transitions, 471 flow [2023-01-27 23:10:46,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 107.88235294117646) internal successors, (1834), 17 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:46,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:10:46,299 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:10:46,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 23:10:46,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:46,504 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:10:46,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:10:46,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1189533459, now seen corresponding path program 3 times [2023-01-27 23:10:46,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:10:46,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247241952] [2023-01-27 23:10:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:10:46,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:10:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:10:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:48,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:10:48,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247241952] [2023-01-27 23:10:48,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247241952] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:10:48,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825621399] [2023-01-27 23:10:48,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:10:48,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:10:48,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:10:48,673 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) [2023-01-27 23:10:48,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 23:10:49,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 23:10:49,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:10:49,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 23:10:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:49,082 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 [2023-01-27 23:10:49,123 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 [2023-01-27 23:10:49,155 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 [2023-01-27 23:10:49,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:49,364 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2023-01-27 23:10:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:10:49,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:49,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:10:49,750 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 374 treesize of output 218 [2023-01-27 23:10:50,090 INFO L321 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2023-01-27 23:10:50,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 488 treesize of output 691 [2023-01-27 23:10:50,536 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-01-27 23:10:50,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 376 treesize of output 520 [2023-01-27 23:10:50,957 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-01-27 23:10:50,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 373 [2023-01-27 23:11:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:11:12,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825621399] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:11:12,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:11:12,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-01-27 23:11:12,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795910807] [2023-01-27 23:11:12,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:11:12,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 23:11:12,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:11:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 23:11:12,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=747, Unknown=3, NotChecked=0, Total=870 [2023-01-27 23:11:12,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-01-27 23:11:12,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 49 transitions, 471 flow. Second operand has 30 states, 30 states have (on average 116.5) internal successors, (3495), 30 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:12,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:11:12,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-01-27 23:11:12,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:11:18,792 INFO L130 PetriNetUnfolder]: 501/889 cut-off events. [2023-01-27 23:11:18,793 INFO L131 PetriNetUnfolder]: For 3702/3741 co-relation queries the response was YES. [2023-01-27 23:11:18,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4649 conditions, 889 events. 501/889 cut-off events. For 3702/3741 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3809 event pairs, 30 based on Foata normal form. 39/917 useless extension candidates. Maximal degree in co-relation 4596. Up to 356 conditions per place. [2023-01-27 23:11:18,799 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 125 selfloop transitions, 75 changer transitions 13/220 dead transitions. [2023-01-27 23:11:18,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 220 transitions, 2194 flow [2023-01-27 23:11:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 23:11:18,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 23:11:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2922 transitions. [2023-01-27 23:11:18,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3097964376590331 [2023-01-27 23:11:18,805 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2922 transitions. [2023-01-27 23:11:18,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2922 transitions. [2023-01-27 23:11:18,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:11:18,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2922 transitions. [2023-01-27 23:11:18,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 121.75) internal successors, (2922), 24 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:18,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:18,819 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:18,819 INFO L175 Difference]: Start difference. First operand has 84 places, 49 transitions, 471 flow. Second operand 24 states and 2922 transitions. [2023-01-27 23:11:18,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 220 transitions, 2194 flow [2023-01-27 23:11:18,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 220 transitions, 1859 flow, removed 101 selfloop flow, removed 16 redundant places. [2023-01-27 23:11:18,827 INFO L231 Difference]: Finished difference. Result has 86 places, 120 transitions, 1292 flow [2023-01-27 23:11:18,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1292, PETRI_PLACES=86, PETRI_TRANSITIONS=120} [2023-01-27 23:11:18,827 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-01-27 23:11:18,827 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 120 transitions, 1292 flow [2023-01-27 23:11:18,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 116.5) internal successors, (3495), 30 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:18,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:11:18,828 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:11:18,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 23:11:19,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-27 23:11:19,034 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:11:19,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:11:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash -948692765, now seen corresponding path program 4 times [2023-01-27 23:11:19,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:11:19,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093786044] [2023-01-27 23:11:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:11:19,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:11:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:11:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:11:21,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:11:21,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093786044] [2023-01-27 23:11:21,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093786044] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:11:21,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820088393] [2023-01-27 23:11:21,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:11:21,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:21,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:11:21,334 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) [2023-01-27 23:11:21,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 23:11:21,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:11:21,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:11:21,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 23:11:21,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:11:21,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:11:21,580 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-01-27 23:11:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:11:21,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:11:22,018 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-01-27 23:11:22,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-01-27 23:11:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:11:22,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820088393] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:11:22,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:11:22,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 21 [2023-01-27 23:11:22,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553625084] [2023-01-27 23:11:22,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:11:22,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 23:11:22,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:11:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 23:11:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-01-27 23:11:22,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-01-27 23:11:22,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 120 transitions, 1292 flow. Second operand has 23 states, 23 states have (on average 116.91304347826087) internal successors, (2689), 23 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:22,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:11:22,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-01-27 23:11:22,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:11:24,111 INFO L130 PetriNetUnfolder]: 909/1627 cut-off events. [2023-01-27 23:11:24,111 INFO L131 PetriNetUnfolder]: For 5998/6052 co-relation queries the response was YES. [2023-01-27 23:11:24,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8270 conditions, 1627 events. 909/1627 cut-off events. For 5998/6052 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8233 event pairs, 142 based on Foata normal form. 44/1657 useless extension candidates. Maximal degree in co-relation 7653. Up to 856 conditions per place. [2023-01-27 23:11:24,120 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 159 selfloop transitions, 113 changer transitions 7/286 dead transitions. [2023-01-27 23:11:24,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 286 transitions, 3146 flow [2023-01-27 23:11:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 23:11:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 23:11:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2793 transitions. [2023-01-27 23:11:24,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3089943577829406 [2023-01-27 23:11:24,125 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2793 transitions. [2023-01-27 23:11:24,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2793 transitions. [2023-01-27 23:11:24,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:11:24,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2793 transitions. [2023-01-27 23:11:24,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 121.43478260869566) internal successors, (2793), 23 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:24,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:24,137 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:24,137 INFO L175 Difference]: Start difference. First operand has 86 places, 120 transitions, 1292 flow. Second operand 23 states and 2793 transitions. [2023-01-27 23:11:24,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 286 transitions, 3146 flow [2023-01-27 23:11:24,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 286 transitions, 2902 flow, removed 120 selfloop flow, removed 2 redundant places. [2023-01-27 23:11:24,155 INFO L231 Difference]: Finished difference. Result has 111 places, 204 transitions, 2299 flow [2023-01-27 23:11:24,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2299, PETRI_PLACES=111, PETRI_TRANSITIONS=204} [2023-01-27 23:11:24,156 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2023-01-27 23:11:24,157 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 204 transitions, 2299 flow [2023-01-27 23:11:24,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 116.91304347826087) internal successors, (2689), 23 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:24,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:11:24,158 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:11:24,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 23:11:24,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:24,362 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:11:24,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:11:24,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1426113403, now seen corresponding path program 5 times [2023-01-27 23:11:24,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:11:24,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623201943] [2023-01-27 23:11:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:11:24,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:11:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:11:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:11:26,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:11:26,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623201943] [2023-01-27 23:11:26,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623201943] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:11:26,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234143773] [2023-01-27 23:11:26,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:11:26,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:26,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:11:26,309 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) [2023-01-27 23:11:26,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 23:11:26,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 23:11:26,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:11:26,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 23:11:26,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:11:26,576 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:11:26,656 INFO L321 Elim1Store]: treesize reduction 169, result has 27.2 percent of original size [2023-01-27 23:11:26,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 99 [2023-01-27 23:11:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:11:26,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:11:27,104 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-01-27 23:11:27,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-01-27 23:11:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:11:27,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234143773] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:11:27,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:11:27,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-01-27 23:11:27,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155743249] [2023-01-27 23:11:27,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:11:27,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 23:11:27,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:11:27,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 23:11:27,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-01-27 23:11:27,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-01-27 23:11:27,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 204 transitions, 2299 flow. Second operand has 24 states, 24 states have (on average 116.91666666666667) internal successors, (2806), 24 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:27,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:11:27,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-01-27 23:11:27,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:11:29,515 INFO L130 PetriNetUnfolder]: 1453/2617 cut-off events. [2023-01-27 23:11:29,515 INFO L131 PetriNetUnfolder]: For 11029/11077 co-relation queries the response was YES. [2023-01-27 23:11:29,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13312 conditions, 2617 events. 1453/2617 cut-off events. For 11029/11077 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15193 event pairs, 242 based on Foata normal form. 37/2640 useless extension candidates. Maximal degree in co-relation 12505. Up to 1581 conditions per place. [2023-01-27 23:11:29,531 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 209 selfloop transitions, 137 changer transitions 5/358 dead transitions. [2023-01-27 23:11:29,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 358 transitions, 4361 flow [2023-01-27 23:11:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 23:11:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 23:11:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2904 transitions. [2023-01-27 23:11:29,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30788804071246817 [2023-01-27 23:11:29,535 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2904 transitions. [2023-01-27 23:11:29,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2904 transitions. [2023-01-27 23:11:29,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:11:29,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2904 transitions. [2023-01-27 23:11:29,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 121.0) internal successors, (2904), 24 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:29,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:29,547 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:29,548 INFO L175 Difference]: Start difference. First operand has 111 places, 204 transitions, 2299 flow. Second operand 24 states and 2904 transitions. [2023-01-27 23:11:29,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 358 transitions, 4361 flow [2023-01-27 23:11:29,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 358 transitions, 4059 flow, removed 136 selfloop flow, removed 6 redundant places. [2023-01-27 23:11:29,580 INFO L231 Difference]: Finished difference. Result has 134 places, 281 transitions, 3428 flow [2023-01-27 23:11:29,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3428, PETRI_PLACES=134, PETRI_TRANSITIONS=281} [2023-01-27 23:11:29,580 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2023-01-27 23:11:29,580 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 281 transitions, 3428 flow [2023-01-27 23:11:29,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 116.91666666666667) internal successors, (2806), 24 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:29,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:11:29,581 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:11:29,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 23:11:29,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:29,786 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:11:29,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:11:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1515982353, now seen corresponding path program 6 times [2023-01-27 23:11:29,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:11:29,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060424154] [2023-01-27 23:11:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:11:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:11:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:11:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:11:31,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:11:31,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060424154] [2023-01-27 23:11:31,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060424154] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:11:31,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575746964] [2023-01-27 23:11:31,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:11:31,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:31,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:11:31,676 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) [2023-01-27 23:11:31,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 23:11:31,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 23:11:31,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:11:31,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 23:11:31,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:11:31,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:11:31,998 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-01-27 23:11:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:11:32,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:11:32,439 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-01-27 23:11:32,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-01-27 23:11:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:11:33,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575746964] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:11:33,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:11:33,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 21 [2023-01-27 23:11:33,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009574938] [2023-01-27 23:11:33,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:11:33,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 23:11:33,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:11:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 23:11:33,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2023-01-27 23:11:33,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-01-27 23:11:33,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 281 transitions, 3428 flow. Second operand has 23 states, 23 states have (on average 116.91304347826087) internal successors, (2689), 23 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:33,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:11:33,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-01-27 23:11:33,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:11:34,844 INFO L130 PetriNetUnfolder]: 2041/3678 cut-off events. [2023-01-27 23:11:34,844 INFO L131 PetriNetUnfolder]: For 17384/17438 co-relation queries the response was YES. [2023-01-27 23:11:34,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19297 conditions, 3678 events. 2041/3678 cut-off events. For 17384/17438 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23422 event pairs, 423 based on Foata normal form. 34/3690 useless extension candidates. Maximal degree in co-relation 18034. Up to 2503 conditions per place. [2023-01-27 23:11:34,872 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 282 selfloop transitions, 153 changer transitions 9/451 dead transitions. [2023-01-27 23:11:34,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 451 transitions, 5965 flow [2023-01-27 23:11:34,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 23:11:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 23:11:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2896 transitions. [2023-01-27 23:11:34,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3070398642917727 [2023-01-27 23:11:34,876 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2896 transitions. [2023-01-27 23:11:34,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2896 transitions. [2023-01-27 23:11:34,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:11:34,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2896 transitions. [2023-01-27 23:11:34,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 120.66666666666667) internal successors, (2896), 24 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:34,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:34,883 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:34,883 INFO L175 Difference]: Start difference. First operand has 134 places, 281 transitions, 3428 flow. Second operand 24 states and 2896 transitions. [2023-01-27 23:11:34,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 451 transitions, 5965 flow [2023-01-27 23:11:34,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 451 transitions, 5756 flow, removed 67 selfloop flow, removed 11 redundant places. [2023-01-27 23:11:34,935 INFO L231 Difference]: Finished difference. Result has 157 places, 374 transitions, 5065 flow [2023-01-27 23:11:34,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5065, PETRI_PLACES=157, PETRI_TRANSITIONS=374} [2023-01-27 23:11:34,936 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-01-27 23:11:34,936 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 374 transitions, 5065 flow [2023-01-27 23:11:34,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 116.91304347826087) internal successors, (2689), 23 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:34,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:11:34,936 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:11:34,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-27 23:11:35,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 23:11:35,142 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:11:35,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:11:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1908414437, now seen corresponding path program 7 times [2023-01-27 23:11:35,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:11:35,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761856181] [2023-01-27 23:11:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:11:35,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:11:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:11:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:11:36,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:11:36,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761856181] [2023-01-27 23:11:36,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761856181] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:11:36,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289506731] [2023-01-27 23:11:36,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:11:36,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:36,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:11:36,727 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) [2023-01-27 23:11:36,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 23:11:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:11:36,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 23:11:36,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:11:37,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:11:37,005 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 32 treesize of output 28 [2023-01-27 23:11:37,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:11:37,061 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-01-27 23:11:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:11:37,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:11:37,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:11:37,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 136 treesize of output 360 [2023-01-27 23:11:37,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:11:37,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 92 [2023-01-27 23:11:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:11:39,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289506731] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:11:39,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:11:39,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-01-27 23:11:39,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4280954] [2023-01-27 23:11:39,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:11:39,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 23:11:39,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:11:39,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 23:11:39,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=617, Unknown=11, NotChecked=0, Total=702 [2023-01-27 23:11:39,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-01-27 23:11:39,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 374 transitions, 5065 flow. Second operand has 27 states, 27 states have (on average 116.55555555555556) internal successors, (3147), 27 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:39,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:11:39,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-01-27 23:11:39,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:11:40,481 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_391 (Array Int Int))) (= c_~x1~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_391) c_~f~0.base))) (select .cse0 (+ (* (select .cse0 (+ (* 4 (select .cse0 (+ c_~f~0.offset (* (select .cse0 .cse1) 4)))) c_~f~0.offset)) 4) c_~f~0.offset))))) (forall ((v_ArrVal_391 (Array Int Int))) (= (let ((.cse2 (select |c_#memory_int| c_~f~0.base))) (select .cse2 (+ c_~f~0.offset (* (select .cse2 (+ (* c_~x1~0 4) c_~f~0.offset)) 4)))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_391) c_~f~0.base))) (select .cse3 (+ (* (select .cse3 (+ (* 4 (select .cse3 (+ c_~f~0.offset (* (select .cse3 .cse1) 4)))) c_~f~0.offset)) 4) c_~f~0.offset))))))) is different from false [2023-01-27 23:11:42,224 INFO L130 PetriNetUnfolder]: 2735/4937 cut-off events. [2023-01-27 23:11:42,224 INFO L131 PetriNetUnfolder]: For 29705/29792 co-relation queries the response was YES. [2023-01-27 23:11:42,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27864 conditions, 4937 events. 2735/4937 cut-off events. For 29705/29792 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 33297 event pairs, 487 based on Foata normal form. 78/5003 useless extension candidates. Maximal degree in co-relation 26483. Up to 3238 conditions per place. [2023-01-27 23:11:42,249 INFO L137 encePairwiseOnDemand]: 384/393 looper letters, 340 selfloop transitions, 236 changer transitions 12/595 dead transitions. [2023-01-27 23:11:42,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 595 transitions, 8728 flow [2023-01-27 23:11:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 23:11:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 23:11:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3159 transitions. [2023-01-27 23:11:42,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30916030534351147 [2023-01-27 23:11:42,267 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3159 transitions. [2023-01-27 23:11:42,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3159 transitions. [2023-01-27 23:11:42,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:11:42,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3159 transitions. [2023-01-27 23:11:42,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 121.5) internal successors, (3159), 26 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:42,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 393.0) internal successors, (10611), 27 states have internal predecessors, (10611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:42,276 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 393.0) internal successors, (10611), 27 states have internal predecessors, (10611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:42,276 INFO L175 Difference]: Start difference. First operand has 157 places, 374 transitions, 5065 flow. Second operand 26 states and 3159 transitions. [2023-01-27 23:11:42,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 595 transitions, 8728 flow [2023-01-27 23:11:42,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 595 transitions, 8518 flow, removed 72 selfloop flow, removed 10 redundant places. [2023-01-27 23:11:42,354 INFO L231 Difference]: Finished difference. Result has 180 places, 501 transitions, 7630 flow [2023-01-27 23:11:42,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7630, PETRI_PLACES=180, PETRI_TRANSITIONS=501} [2023-01-27 23:11:42,354 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 159 predicate places. [2023-01-27 23:11:42,354 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 501 transitions, 7630 flow [2023-01-27 23:11:42,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.55555555555556) internal successors, (3147), 27 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:42,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:11:42,355 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:11:42,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 23:11:42,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 23:11:42,560 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:11:42,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:11:42,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2019099547, now seen corresponding path program 8 times [2023-01-27 23:11:42,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:11:42,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850418705] [2023-01-27 23:11:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:11:42,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:11:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:11:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:11:44,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:11:44,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850418705] [2023-01-27 23:11:44,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850418705] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:11:44,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219585173] [2023-01-27 23:11:44,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:11:44,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:44,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:11:44,157 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) [2023-01-27 23:11:44,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 23:11:44,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:11:44,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:11:44,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-27 23:11:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:11:44,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:11:44,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-27 23:11:44,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:11:44,491 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-01-27 23:11:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:11:44,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:11:46,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:11:46,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 372 [2023-01-27 23:11:46,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:11:46,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 43 treesize of output 192 [2023-01-27 23:11:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:11:49,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219585173] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:11:49,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:11:49,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-01-27 23:11:49,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654708839] [2023-01-27 23:11:49,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:11:49,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 23:11:49,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:11:49,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 23:11:49,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=613, Unknown=11, NotChecked=0, Total=702 [2023-01-27 23:11:49,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-01-27 23:11:49,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 501 transitions, 7630 flow. Second operand has 27 states, 27 states have (on average 116.62962962962963) internal successors, (3149), 27 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:49,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:11:49,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-01-27 23:11:49,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:12:05,469 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] [2023-01-27 23:12:07,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:09,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:10,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:12,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:20,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:22,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:24,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:26,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:29,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:31,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:33,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:35,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:37,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:39,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:41,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:43,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:45,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:48,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:50,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:52,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:54,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:12:54,612 INFO L130 PetriNetUnfolder]: 3160/5747 cut-off events. [2023-01-27 23:12:54,613 INFO L131 PetriNetUnfolder]: For 45034/45099 co-relation queries the response was YES. [2023-01-27 23:12:54,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37105 conditions, 5747 events. 3160/5747 cut-off events. For 45034/45099 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40524 event pairs, 660 based on Foata normal form. 59/5794 useless extension candidates. Maximal degree in co-relation 35598. Up to 4433 conditions per place. [2023-01-27 23:12:54,652 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 434 selfloop transitions, 218 changer transitions 17/676 dead transitions. [2023-01-27 23:12:54,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 676 transitions, 11096 flow [2023-01-27 23:12:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 23:12:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 23:12:54,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2916 transitions. [2023-01-27 23:12:54,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30916030534351147 [2023-01-27 23:12:54,655 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2916 transitions. [2023-01-27 23:12:54,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2916 transitions. [2023-01-27 23:12:54,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:12:54,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2916 transitions. [2023-01-27 23:12:54,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 121.5) internal successors, (2916), 24 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:54,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:54,664 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:54,664 INFO L175 Difference]: Start difference. First operand has 180 places, 501 transitions, 7630 flow. Second operand 24 states and 2916 transitions. [2023-01-27 23:12:54,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 676 transitions, 11096 flow [2023-01-27 23:12:54,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 676 transitions, 10574 flow, removed 245 selfloop flow, removed 6 redundant places. [2023-01-27 23:12:54,809 INFO L231 Difference]: Finished difference. Result has 207 places, 579 transitions, 9314 flow [2023-01-27 23:12:54,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=7270, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=9314, PETRI_PLACES=207, PETRI_TRANSITIONS=579} [2023-01-27 23:12:54,809 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2023-01-27 23:12:54,809 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 579 transitions, 9314 flow [2023-01-27 23:12:54,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.62962962962963) internal successors, (3149), 27 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:54,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:12:54,810 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:12:54,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 23:12:55,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 23:12:55,016 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:12:55,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:12:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2049887361, now seen corresponding path program 9 times [2023-01-27 23:12:55,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:12:55,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528709895] [2023-01-27 23:12:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:12:55,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:12:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:12:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:12:56,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:12:56,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528709895] [2023-01-27 23:12:56,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528709895] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:12:56,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811415072] [2023-01-27 23:12:56,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:12:56,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:12:56,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:12:56,451 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) [2023-01-27 23:12:56,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 23:12:56,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 23:12:56,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:12:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 23:12:56,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:12:56,706 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 [2023-01-27 23:12:56,743 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 [2023-01-27 23:12:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:12:56,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 23:12:56,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:12:56,941 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-01-27 23:12:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:12:56,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:12:57,138 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_464 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_464) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))) 4) c_~f~0.offset))))) (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4))))))))) is different from false [2023-01-27 23:12:57,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:12:57,228 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 208 treesize of output 125 [2023-01-27 23:12:57,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:12:57,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 514 treesize of output 1024 [2023-01-27 23:12:58,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:12:58,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 180 treesize of output 644 [2023-01-27 23:12:58,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:12:58,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 335 treesize of output 493 [2023-01-27 23:17:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-01-27 23:17:40,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811415072] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:17:40,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:17:40,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-01-27 23:17:40,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940662162] [2023-01-27 23:17:40,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:17:40,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 23:17:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:17:40,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 23:17:40,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=654, Unknown=17, NotChecked=52, Total=812 [2023-01-27 23:17:40,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-01-27 23:17:40,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 579 transitions, 9314 flow. Second operand has 29 states, 29 states have (on average 116.62068965517241) internal successors, (3382), 29 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:40,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:17:40,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-01-27 23:17:40,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:17:43,530 INFO L130 PetriNetUnfolder]: 3772/6877 cut-off events. [2023-01-27 23:17:43,530 INFO L131 PetriNetUnfolder]: For 66099/66178 co-relation queries the response was YES. [2023-01-27 23:17:43,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46684 conditions, 6877 events. 3772/6877 cut-off events. For 66099/66178 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 50573 event pairs, 716 based on Foata normal form. 63/6924 useless extension candidates. Maximal degree in co-relation 45103. Up to 3808 conditions per place. [2023-01-27 23:17:43,606 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 430 selfloop transitions, 367 changer transitions 9/813 dead transitions. [2023-01-27 23:17:43,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 813 transitions, 14127 flow [2023-01-27 23:17:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 23:17:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 23:17:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3506 transitions. [2023-01-27 23:17:43,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30762481354742477 [2023-01-27 23:17:43,609 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3506 transitions. [2023-01-27 23:17:43,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3506 transitions. [2023-01-27 23:17:43,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:17:43,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3506 transitions. [2023-01-27 23:17:43,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 120.89655172413794) internal successors, (3506), 29 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:43,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 393.0) internal successors, (11790), 30 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:43,618 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 393.0) internal successors, (11790), 30 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:43,618 INFO L175 Difference]: Start difference. First operand has 207 places, 579 transitions, 9314 flow. Second operand 29 states and 3506 transitions. [2023-01-27 23:17:43,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 813 transitions, 14127 flow [2023-01-27 23:17:43,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 813 transitions, 13508 flow, removed 233 selfloop flow, removed 10 redundant places. [2023-01-27 23:17:43,946 INFO L231 Difference]: Finished difference. Result has 240 places, 694 transitions, 12340 flow [2023-01-27 23:17:43,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=8901, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12340, PETRI_PLACES=240, PETRI_TRANSITIONS=694} [2023-01-27 23:17:43,947 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2023-01-27 23:17:43,947 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 694 transitions, 12340 flow [2023-01-27 23:17:43,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 116.62068965517241) internal successors, (3382), 29 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:43,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:17:43,948 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:17:43,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 23:17:44,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 23:17:44,152 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:17:44,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:17:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash 604633863, now seen corresponding path program 10 times [2023-01-27 23:17:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:17:44,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443940415] [2023-01-27 23:17:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:17:44,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:17:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:17:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:17:45,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:17:45,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443940415] [2023-01-27 23:17:45,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443940415] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:17:45,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714174417] [2023-01-27 23:17:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:17:45,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:17:45,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:17:45,624 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) [2023-01-27 23:17:45,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 23:17:45,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:17:45,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:17:45,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-27 23:17:45,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:17:45,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:17:45,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-27 23:17:46,054 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:17:46,055 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2023-01-27 23:17:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:17:46,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:17:46,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:17:46,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 368 treesize of output 480 [2023-01-27 23:17:46,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:17:46,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 120 treesize of output 220 [2023-01-27 23:17:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:17:50,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714174417] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:17:50,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:17:50,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-01-27 23:17:50,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716369386] [2023-01-27 23:17:50,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:17:50,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 23:17:50,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:17:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 23:17:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=763, Unknown=4, NotChecked=0, Total=870 [2023-01-27 23:17:50,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-01-27 23:17:50,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 694 transitions, 12340 flow. Second operand has 30 states, 30 states have (on average 116.56666666666666) internal successors, (3497), 30 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:50,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:17:50,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-01-27 23:17:50,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:17:50,994 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* c_~x1~0 4))) (let ((.cse1 (select |c_#memory_int| c_~f~0.base)) (.cse9 (+ .cse10 c_~f~0.offset))) (let ((.cse12 (select .cse1 .cse9))) (let ((.cse5 (+ (* c_~x2~0 4) c_~f~0.offset)) (.cse0 (select .cse1 (+ c_~f~0.offset (* .cse12 4)))) (.cse3 (<= c_~size~0 .cse12)) (.cse4 (< .cse12 0))) (and (= c_~f~0.offset 0) (let ((.cse2 (select .cse1 (+ c_~f~0.offset (* 4 (select .cse1 (+ (* (select .cse1 .cse5) 4) c_~f~0.offset))))))) (or (= .cse0 (select .cse1 (+ c_~f~0.offset (* .cse2 4)))) (< .cse2 0) (<= c_~size~0 .cse2) .cse3 .cse4)) (forall ((v_ArrVal_499 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_499) c_~f~0.base))) (let ((.cse6 (select .cse8 (+ c_~f~0.offset (* (select .cse8 (+ (* 4 (select .cse8 .cse5)) c_~f~0.offset)) 4)))) (.cse7 (select .cse8 .cse9))) (or (<= c_~size~0 .cse6) (< .cse7 0) (<= c_~size~0 .cse7) (< .cse6 0) (= (select .cse8 (+ c_~f~0.offset (* .cse6 4))) (select .cse8 (+ (* .cse7 4) c_~f~0.offset))))))) (let ((.cse11 (= c_~x1~0 0))) (or (and (= (select .cse1 .cse10) 1) (= (select .cse1 4) c_~x2~0)) (and (not .cse11) (<= c_~x1~0 0)) (and (= (select .cse1 0) 0) (= c_~x2~0 0) .cse11) (<= c_~size~0 c_~x1~0))) (or (= .cse0 c_~x2~0) .cse3 .cse4)))))) is different from false [2023-01-27 23:17:53,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:18:01,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:18:03,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:18:06,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:18:08,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:18:10,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:18:13,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:18:14,028 INFO L130 PetriNetUnfolder]: 4269/7769 cut-off events. [2023-01-27 23:18:14,028 INFO L131 PetriNetUnfolder]: For 85286/85371 co-relation queries the response was YES. [2023-01-27 23:18:14,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55437 conditions, 7769 events. 4269/7769 cut-off events. For 85286/85371 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 58404 event pairs, 984 based on Foata normal form. 78/7829 useless extension candidates. Maximal degree in co-relation 53885. Up to 6020 conditions per place. [2023-01-27 23:18:14,089 INFO L137 encePairwiseOnDemand]: 384/393 looper letters, 626 selfloop transitions, 240 changer transitions 2/875 dead transitions. [2023-01-27 23:18:14,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 875 transitions, 16699 flow [2023-01-27 23:18:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 23:18:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 23:18:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2998 transitions. [2023-01-27 23:18:14,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051399491094148 [2023-01-27 23:18:14,092 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2998 transitions. [2023-01-27 23:18:14,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2998 transitions. [2023-01-27 23:18:14,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:18:14,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2998 transitions. [2023-01-27 23:18:14,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 119.92) internal successors, (2998), 25 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:14,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 393.0) internal successors, (10218), 26 states have internal predecessors, (10218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:14,100 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 393.0) internal successors, (10218), 26 states have internal predecessors, (10218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:14,100 INFO L175 Difference]: Start difference. First operand has 240 places, 694 transitions, 12340 flow. Second operand 25 states and 2998 transitions. [2023-01-27 23:18:14,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 875 transitions, 16699 flow [2023-01-27 23:18:14,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 875 transitions, 16306 flow, removed 151 selfloop flow, removed 9 redundant places. [2023-01-27 23:18:14,441 INFO L231 Difference]: Finished difference. Result has 265 places, 795 transitions, 14782 flow [2023-01-27 23:18:14,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=12028, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=14782, PETRI_PLACES=265, PETRI_TRANSITIONS=795} [2023-01-27 23:18:14,441 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-01-27 23:18:14,441 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 795 transitions, 14782 flow [2023-01-27 23:18:14,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 116.56666666666666) internal successors, (3497), 30 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:14,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:18:14,442 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:18:14,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 23:18:14,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 23:18:14,647 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:18:14,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:18:14,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1039232141, now seen corresponding path program 11 times [2023-01-27 23:18:14,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:18:14,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355000307] [2023-01-27 23:18:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:18:14,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:18:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:18:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:18:16,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:18:16,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355000307] [2023-01-27 23:18:16,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355000307] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:18:16,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423867735] [2023-01-27 23:18:16,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:18:16,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:18:16,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:18:16,463 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) [2023-01-27 23:18:16,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 23:18:16,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 23:18:16,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:18:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 67 conjunts are in the unsatisfiable core [2023-01-27 23:18:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:18:16,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-01-27 23:18:16,708 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 [2023-01-27 23:18:16,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:18:16,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 23:18:17,139 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:18:17,176 INFO L321 Elim1Store]: treesize reduction 101, result has 18.5 percent of original size [2023-01-27 23:18:17,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 103 treesize of output 67 [2023-01-27 23:18:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:18:17,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:18:18,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:18:18,284 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 851 treesize of output 479 [2023-01-27 23:18:19,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:18:19,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 4138 treesize of output 3794 [2023-01-27 23:18:19,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:18:19,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 864 treesize of output 902 [2023-01-27 23:18:21,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:18:21,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 521 treesize of output 721 [2023-01-27 23:21:04,716 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 23:21:08,909 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-01-27 23:21:22,790 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 23:21:24,087 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 23:21:25,576 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 23:21:27,578 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 23:21:30,688 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-01-27 23:21:56,859 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 23:22:00,264 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 23:22:13,505 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 23:22:15,007 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 23:22:16,444 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-01-27 23:22:59,433 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 23:22:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:22:59,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423867735] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:22:59,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:22:59,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 28 [2023-01-27 23:22:59,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050638767] [2023-01-27 23:22:59,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:22:59,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 23:22:59,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:22:59,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 23:22:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=762, Unknown=1, NotChecked=0, Total=870 [2023-01-27 23:22:59,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-01-27 23:22:59,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 795 transitions, 14782 flow. Second operand has 30 states, 30 states have (on average 116.73333333333333) internal successors, (3502), 30 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:22:59,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:22:59,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-01-27 23:22:59,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:23:01,860 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] [2023-01-27 23:23:14,927 WARN L222 SmtUtils]: Spent 12.25s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 23:23:20,498 INFO L130 PetriNetUnfolder]: 4696/8555 cut-off events. [2023-01-27 23:23:20,499 INFO L131 PetriNetUnfolder]: For 109092/109199 co-relation queries the response was YES. [2023-01-27 23:23:20,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65435 conditions, 8555 events. 4696/8555 cut-off events. For 109092/109199 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 64797 event pairs, 1115 based on Foata normal form. 73/8593 useless extension candidates. Maximal degree in co-relation 63780. Up to 5379 conditions per place. [2023-01-27 23:23:20,566 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 677 selfloop transitions, 278 changer transitions 9/971 dead transitions. [2023-01-27 23:23:20,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 971 transitions, 19248 flow [2023-01-27 23:23:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 23:23:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 23:23:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3611 transitions. [2023-01-27 23:23:20,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3062765055131467 [2023-01-27 23:23:20,572 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3611 transitions. [2023-01-27 23:23:20,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3611 transitions. [2023-01-27 23:23:20,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:23:20,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3611 transitions. [2023-01-27 23:23:20,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 120.36666666666666) internal successors, (3611), 30 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:20,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 393.0) internal successors, (12183), 31 states have internal predecessors, (12183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:20,587 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 393.0) internal successors, (12183), 31 states have internal predecessors, (12183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:20,587 INFO L175 Difference]: Start difference. First operand has 265 places, 795 transitions, 14782 flow. Second operand 30 states and 3611 transitions. [2023-01-27 23:23:20,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 971 transitions, 19248 flow [2023-01-27 23:23:20,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 971 transitions, 18928 flow, removed 110 selfloop flow, removed 12 redundant places. [2023-01-27 23:23:20,990 INFO L231 Difference]: Finished difference. Result has 289 places, 857 transitions, 16767 flow [2023-01-27 23:23:20,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=14494, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=16767, PETRI_PLACES=289, PETRI_TRANSITIONS=857} [2023-01-27 23:23:20,991 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 268 predicate places. [2023-01-27 23:23:20,991 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 857 transitions, 16767 flow [2023-01-27 23:23:20,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 116.73333333333333) internal successors, (3502), 30 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:20,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:23:20,992 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:23:20,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 23:23:21,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:23:21,197 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:23:21,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:23:21,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1041507267, now seen corresponding path program 12 times [2023-01-27 23:23:21,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:23:21,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295280081] [2023-01-27 23:23:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:23:21,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:23:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:23:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:23:24,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:23:24,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295280081] [2023-01-27 23:23:24,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295280081] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:23:24,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048879285] [2023-01-27 23:23:24,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:23:24,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:23:24,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:23:24,907 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) [2023-01-27 23:23:24,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 23:23:25,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 23:23:25,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:23:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 23:23:25,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:23:25,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:23:25,311 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-01-27 23:23:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:23:25,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:23:25,749 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-01-27 23:23:25,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-01-27 23:23:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 23:23:26,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048879285] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:23:26,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:23:26,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 5] total 23 [2023-01-27 23:23:26,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67703331] [2023-01-27 23:23:26,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:23:26,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 23:23:26,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:23:26,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 23:23:26,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2023-01-27 23:23:26,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-01-27 23:23:26,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 857 transitions, 16767 flow. Second operand has 25 states, 25 states have (on average 116.92) internal successors, (2923), 25 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:26,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:23:26,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-01-27 23:23:26,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:23:30,271 INFO L130 PetriNetUnfolder]: 4955/9020 cut-off events. [2023-01-27 23:23:30,271 INFO L131 PetriNetUnfolder]: For 121211/121322 co-relation queries the response was YES. [2023-01-27 23:23:30,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70703 conditions, 9020 events. 4955/9020 cut-off events. For 121211/121322 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 68671 event pairs, 1697 based on Foata normal form. 80/9063 useless extension candidates. Maximal degree in co-relation 69036. Up to 8488 conditions per place. [2023-01-27 23:23:30,343 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 863 selfloop transitions, 96 changer transitions 1/967 dead transitions. [2023-01-27 23:23:30,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 967 transitions, 20350 flow [2023-01-27 23:23:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 23:23:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 23:23:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2645 transitions. [2023-01-27 23:23:30,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3059218135554013 [2023-01-27 23:23:30,345 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2645 transitions. [2023-01-27 23:23:30,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2645 transitions. [2023-01-27 23:23:30,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:23:30,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2645 transitions. [2023-01-27 23:23:30,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 120.22727272727273) internal successors, (2645), 22 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:30,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 393.0) internal successors, (9039), 23 states have internal predecessors, (9039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:30,373 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 393.0) internal successors, (9039), 23 states have internal predecessors, (9039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:30,373 INFO L175 Difference]: Start difference. First operand has 289 places, 857 transitions, 16767 flow. Second operand 22 states and 2645 transitions. [2023-01-27 23:23:30,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 967 transitions, 20350 flow [2023-01-27 23:23:30,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 967 transitions, 19906 flow, removed 164 selfloop flow, removed 12 redundant places. [2023-01-27 23:23:30,910 INFO L231 Difference]: Finished difference. Result has 304 places, 908 transitions, 17725 flow [2023-01-27 23:23:30,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=16336, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=17725, PETRI_PLACES=304, PETRI_TRANSITIONS=908} [2023-01-27 23:23:30,911 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2023-01-27 23:23:30,911 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 908 transitions, 17725 flow [2023-01-27 23:23:30,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 116.92) internal successors, (2923), 25 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:30,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:23:30,911 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:23:30,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 23:23:31,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:23:31,116 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:23:31,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:23:31,116 INFO L85 PathProgramCache]: Analyzing trace with hash -400791799, now seen corresponding path program 13 times [2023-01-27 23:23:31,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:23:31,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803536680] [2023-01-27 23:23:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:23:31,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:23:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:23:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:23:35,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:23:35,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803536680] [2023-01-27 23:23:35,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803536680] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:23:35,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170695978] [2023-01-27 23:23:35,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:23:35,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:23:35,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:23:35,144 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) [2023-01-27 23:23:35,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 23:23:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:23:35,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 23:23:35,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:23:35,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:23:35,421 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 26 treesize of output 24 [2023-01-27 23:23:35,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:23:35,532 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-01-27 23:23:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:23:35,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:23:35,627 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_614 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_614) c_~f~0.base))) (= (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))) c_~f~0.offset))))) 4)))))) is different from false [2023-01-27 23:23:35,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:23:35,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 366 [2023-01-27 23:23:36,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:23:36,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-01-27 23:23:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 23:23:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170695978] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:23:38,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:23:38,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 26 [2023-01-27 23:23:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22613445] [2023-01-27 23:23:38,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:23:38,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 23:23:38,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:23:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 23:23:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=625, Unknown=5, NotChecked=50, Total=756 [2023-01-27 23:23:38,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-01-27 23:23:38,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 908 transitions, 17725 flow. Second operand has 28 states, 28 states have (on average 116.67857142857143) internal successors, (3267), 28 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:38,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:23:38,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-01-27 23:23:38,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:23:42,592 INFO L130 PetriNetUnfolder]: 5135/9342 cut-off events. [2023-01-27 23:23:42,592 INFO L131 PetriNetUnfolder]: For 124738/124854 co-relation queries the response was YES. [2023-01-27 23:23:42,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73015 conditions, 9342 events. 5135/9342 cut-off events. For 124738/124854 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 71442 event pairs, 1364 based on Foata normal form. 85/9405 useless extension candidates. Maximal degree in co-relation 71583. Up to 8532 conditions per place. [2023-01-27 23:23:42,668 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 759 selfloop transitions, 253 changer transitions 1/1020 dead transitions. [2023-01-27 23:23:42,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 1020 transitions, 21240 flow [2023-01-27 23:23:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 23:23:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 23:23:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2631 transitions. [2023-01-27 23:23:42,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3043025676613463 [2023-01-27 23:23:42,672 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2631 transitions. [2023-01-27 23:23:42,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2631 transitions. [2023-01-27 23:23:42,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:23:42,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2631 transitions. [2023-01-27 23:23:42,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 119.5909090909091) internal successors, (2631), 22 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:42,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 393.0) internal successors, (9039), 23 states have internal predecessors, (9039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:42,683 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 393.0) internal successors, (9039), 23 states have internal predecessors, (9039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:42,683 INFO L175 Difference]: Start difference. First operand has 304 places, 908 transitions, 17725 flow. Second operand 22 states and 2631 transitions. [2023-01-27 23:23:42,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 1020 transitions, 21240 flow [2023-01-27 23:23:43,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1020 transitions, 20840 flow, removed 190 selfloop flow, removed 5 redundant places. [2023-01-27 23:23:43,255 INFO L231 Difference]: Finished difference. Result has 325 places, 976 transitions, 19204 flow [2023-01-27 23:23:43,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=17335, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=19204, PETRI_PLACES=325, PETRI_TRANSITIONS=976} [2023-01-27 23:23:43,256 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 304 predicate places. [2023-01-27 23:23:43,256 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 976 transitions, 19204 flow [2023-01-27 23:23:43,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 116.67857142857143) internal successors, (3267), 28 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:43,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:23:43,256 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:23:43,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-27 23:23:43,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:23:43,462 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:23:43,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:23:43,462 INFO L85 PathProgramCache]: Analyzing trace with hash -556350376, now seen corresponding path program 14 times [2023-01-27 23:23:43,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:23:43,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976662641] [2023-01-27 23:23:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:23:43,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:23:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:23:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:23:43,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:23:43,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976662641] [2023-01-27 23:23:43,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976662641] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:23:43,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232568813] [2023-01-27 23:23:43,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:23:43,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:23:43,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:23:43,601 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) [2023-01-27 23:23:43,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 23:23:43,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:23:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:23:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 23:23:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:23:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:23:43,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:23:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:23:43,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232568813] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:23:43,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:23:43,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2023-01-27 23:23:43,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557666123] [2023-01-27 23:23:43,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:23:43,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 23:23:43,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:23:43,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 23:23:43,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-01-27 23:23:43,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 393 [2023-01-27 23:23:43,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 976 transitions, 19204 flow. Second operand has 20 states, 20 states have (on average 140.8) internal successors, (2816), 20 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:43,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:23:43,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 393 [2023-01-27 23:23:43,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:23:48,555 INFO L130 PetriNetUnfolder]: 6776/12366 cut-off events. [2023-01-27 23:23:48,556 INFO L131 PetriNetUnfolder]: For 175190/175190 co-relation queries the response was YES. [2023-01-27 23:23:48,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99184 conditions, 12366 events. 6776/12366 cut-off events. For 175190/175190 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 98578 event pairs, 902 based on Foata normal form. 62/12426 useless extension candidates. Maximal degree in co-relation 96933. Up to 5514 conditions per place. [2023-01-27 23:23:48,668 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 844 selfloop transitions, 472 changer transitions 0/1316 dead transitions. [2023-01-27 23:23:48,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1316 transitions, 27664 flow [2023-01-27 23:23:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 23:23:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 23:23:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2048 transitions. [2023-01-27 23:23:48,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222828062522717 [2023-01-27 23:23:48,670 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2048 transitions. [2023-01-27 23:23:48,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2048 transitions. [2023-01-27 23:23:48,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:23:48,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2048 transitions. [2023-01-27 23:23:48,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.28571428571428) internal successors, (2048), 14 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:48,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 393.0) internal successors, (5895), 15 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:48,675 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 393.0) internal successors, (5895), 15 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:48,675 INFO L175 Difference]: Start difference. First operand has 325 places, 976 transitions, 19204 flow. Second operand 14 states and 2048 transitions. [2023-01-27 23:23:48,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1316 transitions, 27664 flow [2023-01-27 23:23:49,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1316 transitions, 27404 flow, removed 71 selfloop flow, removed 9 redundant places. [2023-01-27 23:23:49,512 INFO L231 Difference]: Finished difference. Result has 336 places, 1091 transitions, 23358 flow [2023-01-27 23:23:49,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=18953, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=976, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23358, PETRI_PLACES=336, PETRI_TRANSITIONS=1091} [2023-01-27 23:23:49,513 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-01-27 23:23:49,513 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 1091 transitions, 23358 flow [2023-01-27 23:23:49,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 140.8) internal successors, (2816), 20 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:49,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:23:49,514 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:23:49,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 23:23:49,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-27 23:23:49,719 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:23:49,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:23:49,719 INFO L85 PathProgramCache]: Analyzing trace with hash -750135380, now seen corresponding path program 15 times [2023-01-27 23:23:49,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:23:49,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512694471] [2023-01-27 23:23:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:23:49,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:23:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:23:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:23:49,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:23:49,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512694471] [2023-01-27 23:23:49,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512694471] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:23:49,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451968011] [2023-01-27 23:23:49,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:23:49,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:23:49,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:23:49,889 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) [2023-01-27 23:23:49,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 23:23:50,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 23:23:50,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:23:50,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 23:23:50,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:23:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:23:50,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:23:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:23:50,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451968011] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:23:50,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:23:50,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 22 [2023-01-27 23:23:50,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318064094] [2023-01-27 23:23:50,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:23:50,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 23:23:50,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:23:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 23:23:50,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-01-27 23:23:50,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 393 [2023-01-27 23:23:50,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1091 transitions, 23358 flow. Second operand has 22 states, 22 states have (on average 140.8181818181818) internal successors, (3098), 22 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:50,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:23:50,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 393 [2023-01-27 23:23:50,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:23:56,865 INFO L130 PetriNetUnfolder]: 7195/13268 cut-off events. [2023-01-27 23:23:56,865 INFO L131 PetriNetUnfolder]: For 235393/235393 co-relation queries the response was YES. [2023-01-27 23:23:56,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113562 conditions, 13268 events. 7195/13268 cut-off events. For 235393/235393 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 109274 event pairs, 674 based on Foata normal form. 82/13348 useless extension candidates. Maximal degree in co-relation 112205. Up to 5817 conditions per place. [2023-01-27 23:23:56,979 INFO L137 encePairwiseOnDemand]: 384/393 looper letters, 869 selfloop transitions, 554 changer transitions 53/1476 dead transitions. [2023-01-27 23:23:56,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1476 transitions, 32478 flow [2023-01-27 23:23:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 23:23:56,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 23:23:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2920 transitions. [2023-01-27 23:23:56,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37150127226463103 [2023-01-27 23:23:56,983 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2920 transitions. [2023-01-27 23:23:56,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2920 transitions. [2023-01-27 23:23:56,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:23:56,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2920 transitions. [2023-01-27 23:23:56,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 146.0) internal successors, (2920), 20 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:56,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 393.0) internal successors, (8253), 21 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:56,989 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 393.0) internal successors, (8253), 21 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:56,989 INFO L175 Difference]: Start difference. First operand has 336 places, 1091 transitions, 23358 flow. Second operand 20 states and 2920 transitions. [2023-01-27 23:23:56,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1476 transitions, 32478 flow [2023-01-27 23:23:58,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1476 transitions, 31790 flow, removed 134 selfloop flow, removed 6 redundant places. [2023-01-27 23:23:58,114 INFO L231 Difference]: Finished difference. Result has 357 places, 1180 transitions, 26314 flow [2023-01-27 23:23:58,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=22780, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=26314, PETRI_PLACES=357, PETRI_TRANSITIONS=1180} [2023-01-27 23:23:58,115 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 336 predicate places. [2023-01-27 23:23:58,115 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 1180 transitions, 26314 flow [2023-01-27 23:23:58,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 140.8181818181818) internal successors, (3098), 22 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:58,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:23:58,116 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:23:58,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-27 23:23:58,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:23:58,321 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:23:58,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:23:58,321 INFO L85 PathProgramCache]: Analyzing trace with hash -697345436, now seen corresponding path program 16 times [2023-01-27 23:23:58,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:23:58,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197928984] [2023-01-27 23:23:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:23:58,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:23:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:23:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:23:58,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:23:58,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197928984] [2023-01-27 23:23:58,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197928984] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:23:58,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841962522] [2023-01-27 23:23:58,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:23:58,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:23:58,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:23:58,525 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) [2023-01-27 23:23:58,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 23:23:58,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:23:58,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:23:58,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 23:23:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:23:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:23:58,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:23:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:23:58,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841962522] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:23:58,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:23:58,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2023-01-27 23:23:58,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778081785] [2023-01-27 23:23:58,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:23:58,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 23:23:58,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:23:58,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 23:23:58,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-01-27 23:23:58,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 393 [2023-01-27 23:23:58,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 1180 transitions, 26314 flow. Second operand has 20 states, 20 states have (on average 140.7) internal successors, (2814), 20 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:23:58,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:23:58,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 393 [2023-01-27 23:23:58,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:24:18,021 INFO L130 PetriNetUnfolder]: 8002/15294 cut-off events. [2023-01-27 23:24:18,021 INFO L131 PetriNetUnfolder]: For 402357/402357 co-relation queries the response was YES. [2023-01-27 23:24:18,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147735 conditions, 15294 events. 8002/15294 cut-off events. For 402357/402357 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 134179 event pairs, 186 based on Foata normal form. 152/15444 useless extension candidates. Maximal degree in co-relation 144876. Up to 6862 conditions per place. [2023-01-27 23:24:18,166 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 964 selfloop transitions, 952 changer transitions 120/2036 dead transitions. [2023-01-27 23:24:18,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 2036 transitions, 45349 flow [2023-01-27 23:24:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-27 23:24:18,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-27 23:24:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6078 transitions. [2023-01-27 23:24:18,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36822973464194836 [2023-01-27 23:24:18,171 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6078 transitions. [2023-01-27 23:24:18,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6078 transitions. [2023-01-27 23:24:18,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:24:18,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6078 transitions. [2023-01-27 23:24:18,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 144.71428571428572) internal successors, (6078), 42 states have internal predecessors, (6078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:24:18,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 393.0) internal successors, (16899), 43 states have internal predecessors, (16899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:24:18,182 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 393.0) internal successors, (16899), 43 states have internal predecessors, (16899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:24:18,182 INFO L175 Difference]: Start difference. First operand has 357 places, 1180 transitions, 26314 flow. Second operand 42 states and 6078 transitions. [2023-01-27 23:24:18,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 2036 transitions, 45349 flow [2023-01-27 23:24:20,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 2036 transitions, 43478 flow, removed 663 selfloop flow, removed 8 redundant places. [2023-01-27 23:24:20,181 INFO L231 Difference]: Finished difference. Result has 408 places, 1568 transitions, 35127 flow [2023-01-27 23:24:20,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=24682, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=35127, PETRI_PLACES=408, PETRI_TRANSITIONS=1568} [2023-01-27 23:24:20,182 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 387 predicate places. [2023-01-27 23:24:20,182 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1568 transitions, 35127 flow [2023-01-27 23:24:20,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 140.7) internal successors, (2814), 20 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:24:20,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:24:20,183 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:24:20,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-27 23:24:20,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:20,388 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:24:20,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:24:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash 152609404, now seen corresponding path program 17 times [2023-01-27 23:24:20,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:24:20,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325712448] [2023-01-27 23:24:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:24:20,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:24:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:24:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:24:20,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:24:20,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325712448] [2023-01-27 23:24:20,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325712448] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:24:20,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658139114] [2023-01-27 23:24:20,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:24:20,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:20,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:24:20,658 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) [2023-01-27 23:24:20,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 23:24:20,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 23:24:20,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:24:20,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 23:24:20,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:24:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:24:20,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:24:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:24:21,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658139114] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:24:21,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:24:21,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-01-27 23:24:21,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17680354] [2023-01-27 23:24:21,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:24:21,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 23:24:21,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:24:21,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 23:24:21,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-01-27 23:24:21,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 393 [2023-01-27 23:24:21,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1568 transitions, 35127 flow. Second operand has 24 states, 24 states have (on average 147.58333333333334) internal successors, (3542), 24 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:24:21,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:24:21,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 393 [2023-01-27 23:24:21,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-27 23:24:23,899 WARN L238 SmtUtils]: Removed 4 from assertion stack [2023-01-27 23:24:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 23:24:23,900 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 23:24:23,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 23:24:23,919 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 23:24:23,928 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 [2023-01-27 23:24:24,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:24:24,101 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 49 for 74ms.. [2023-01-27 23:24:24,102 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 23:24:24,102 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 23:24:24,103 INFO L445 BasicCegarLoop]: Path program histogram: [17, 4, 2, 1, 1] [2023-01-27 23:24:24,104 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 23:24:24,105 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 23:24:24,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:24:24 BasicIcfg [2023-01-27 23:24:24,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 23:24:24,106 INFO L158 Benchmark]: Toolchain (without parser) took 839402.78ms. Allocated memory was 373.3MB in the beginning and 5.8GB in the end (delta: 5.5GB). Free memory was 315.0MB in the beginning and 4.2GB in the end (delta: -3.9GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2023-01-27 23:24:24,106 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory is still 320.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:24:24,107 INFO L158 Benchmark]: CACSL2BoogieTranslator took 156.77ms. Allocated memory is still 373.3MB. Free memory was 314.7MB in the beginning and 303.3MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 23:24:24,107 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.87ms. Allocated memory is still 373.3MB. Free memory was 303.3MB in the beginning and 301.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:24:24,107 INFO L158 Benchmark]: Boogie Preprocessor took 16.89ms. Allocated memory is still 373.3MB. Free memory was 301.2MB in the beginning and 299.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:24:24,107 INFO L158 Benchmark]: RCFGBuilder took 381.10ms. Allocated memory was 373.3MB in the beginning and 612.4MB in the end (delta: 239.1MB). Free memory was 299.7MB in the beginning and 575.7MB in the end (delta: -275.9MB). Peak memory consumption was 24.1MB. Max. memory is 16.0GB. [2023-01-27 23:24:24,107 INFO L158 Benchmark]: TraceAbstraction took 838820.67ms. Allocated memory was 612.4MB in the beginning and 5.8GB in the end (delta: 5.2GB). Free memory was 575.7MB in the beginning and 4.2GB in the end (delta: -3.7GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2023-01-27 23:24:24,108 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory is still 320.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 156.77ms. Allocated memory is still 373.3MB. Free memory was 314.7MB in the beginning and 303.3MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.87ms. Allocated memory is still 373.3MB. Free memory was 303.3MB in the beginning and 301.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.89ms. Allocated memory is still 373.3MB. Free memory was 301.2MB in the beginning and 299.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 381.10ms. Allocated memory was 373.3MB in the beginning and 612.4MB in the end (delta: 239.1MB). Free memory was 299.7MB in the beginning and 575.7MB in the end (delta: -275.9MB). Peak memory consumption was 24.1MB. Max. memory is 16.0GB. * TraceAbstraction took 838820.67ms. Allocated memory was 612.4MB in the beginning and 5.8GB in the end (delta: 5.2GB). Free memory was 575.7MB in the beginning and 4.2GB in the end (delta: -3.7GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.9s, 164 PlacesBefore, 21 PlacesAfterwards, 173 TransitionsBefore, 17 TransitionsAfterwards, 3242 CoEnabledTransitionPairs, 7 FixpointIterations, 76 TrivialSequentialCompositions, 72 ConcurrentSequentialCompositions, 22 TrivialYvCompositions, 27 ConcurrentYvCompositions, 13 ChoiceCompositions, 210 TotalNumberOfCompositions, 3238 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3193, independent: 3186, independent conditional: 0, independent unconditional: 3186, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1954, independent: 1950, independent conditional: 0, independent unconditional: 1950, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3193, independent: 1236, independent conditional: 0, independent unconditional: 1236, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 1954, unknown conditional: 0, unknown unconditional: 1954] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 49 for 74ms.. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 49 for 74ms.. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 49 for 74ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 240 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: 838.7s, OverallIterations: 25, TraceHistogramMax: 5, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 176.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 423 mSolverCounterUnknown, 2966 SdHoareTripleChecker+Valid, 75.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2966 mSDsluCounter, 314 SdHoareTripleChecker+Invalid, 73.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 812 IncrementalHoareTripleChecker+Unchecked, 259 mSDsCounter, 411 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15371 IncrementalHoareTripleChecker+Invalid, 17017 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 411 mSolverCounterUnsat, 55 mSDtfsCounter, 15371 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1270 GetRequests, 603 SyntacticMatches, 12 SemanticMatches, 654 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 80.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35127occurred in iteration=24, InterpolantAutomatonStates: 429, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 650.3s InterpolantComputationTime, 873 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 73 NumberOfCheckSat, 1200 ConstructedInterpolants, 59 QuantifiedInterpolants, 29915 SizeOfPredicates, 202 NumberOfNonLiveVariables, 3982 ConjunctsInSsa, 597 ConjunctsInUnsatCore, 63 InterpolantComputations, 7 PerfectInterpolantSequences, 156/768 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