/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/popl20-simple-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 22:51:46,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 22:51:46,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 22:51:46,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 22:51:46,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 22:51:46,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 22:51:46,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 22:51:46,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 22:51:46,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 22:51:46,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 22:51:46,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 22:51:46,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 22:51:46,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 22:51:46,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 22:51:46,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 22:51:46,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 22:51:46,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 22:51:46,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 22:51:46,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 22:51:46,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 22:51:46,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 22:51:46,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 22:51:46,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 22:51:46,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 22:51:46,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 22:51:46,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 22:51:46,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 22:51:46,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 22:51:46,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 22:51:46,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 22:51:46,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 22:51:46,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 22:51:46,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 22:51:46,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 22:51:46,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 22:51:46,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 22:51:46,955 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 22:51:46,986 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 22:51:46,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 22:51:46,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 22:51:46,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 22:51:46,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 22:51:46,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 22:51:46,989 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 22:51:46,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 22:51:46,989 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 22:51:46,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 22:51:46,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 22:51:46,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 22:51:46,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 22:51:46,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 22:51:46,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 22:51:46,991 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 22:51:46,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 22:51:46,991 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 22:51:46,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 22:51:46,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 22:51:46,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 22:51:46,992 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 22:51:46,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 22:51:46,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:51:46,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 22:51:46,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 22:51:46,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 22:51:46,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 22:51:46,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 22:51:46,993 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 22:51:46,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 22:51:46,994 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 22:51:47,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 22:51:47,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 22:51:47,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 22:51:47,243 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 22:51:47,244 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 22:51:47,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-01-27 22:51:48,403 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 22:51:48,602 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 22:51:48,602 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-01-27 22:51:48,608 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57d1f771/3347b1d0e3e14515ac714426a5176cde/FLAG5291d5862 [2023-01-27 22:51:48,627 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57d1f771/3347b1d0e3e14515ac714426a5176cde [2023-01-27 22:51:48,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 22:51:48,630 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 22:51:48,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 22:51:48,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 22:51:48,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 22:51:48,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9187e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48, skipping insertion in model container [2023-01-27 22:51:48,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 22:51:48,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 22:51:48,805 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2438,2451] [2023-01-27 22:51:48,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:51:48,829 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 22:51:48,860 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2438,2451] [2023-01-27 22:51:48,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:51:48,873 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:51:48,873 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:51:48,881 INFO L208 MainTranslator]: Completed translation [2023-01-27 22:51:48,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48 WrapperNode [2023-01-27 22:51:48,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 22:51:48,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 22:51:48,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 22:51:48,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 22:51:48,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,933 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 133 [2023-01-27 22:51:48,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 22:51:48,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 22:51:48,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 22:51:48,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 22:51:48,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,965 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 22:51:48,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 22:51:48,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 22:51:48,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 22:51:48,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (1/1) ... [2023-01-27 22:51:48,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:51:48,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:48,996 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 22:51:49,005 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 22:51:49,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 22:51:49,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 22:51:49,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 22:51:49,028 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 22:51:49,028 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 22:51:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 22:51:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 22:51:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 22:51:49,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 22:51:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 22:51:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 22:51:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 22:51:49,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 22:51:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 22:51:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 22:51:49,036 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 22:51:49,113 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 22:51:49,114 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 22:51:49,297 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 22:51:49,429 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 22:51:49,430 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 22:51:49,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:51:49 BoogieIcfgContainer [2023-01-27 22:51:49,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 22:51:49,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 22:51:49,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 22:51:49,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 22:51:49,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 10:51:48" (1/3) ... [2023-01-27 22:51:49,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ad7f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:51:49, skipping insertion in model container [2023-01-27 22:51:49,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:51:48" (2/3) ... [2023-01-27 22:51:49,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ad7f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:51:49, skipping insertion in model container [2023-01-27 22:51:49,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:51:49" (3/3) ... [2023-01-27 22:51:49,449 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-01-27 22:51:49,465 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 22:51:49,465 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 22:51:49,465 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 22:51:49,518 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 22:51:49,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 246 flow [2023-01-27 22:51:49,613 INFO L130 PetriNetUnfolder]: 9/113 cut-off events. [2023-01-27 22:51:49,614 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:51:49,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 113 events. 9/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-27 22:51:49,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 115 transitions, 246 flow [2023-01-27 22:51:49,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2023-01-27 22:51:49,630 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 22:51:49,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 105 transitions, 222 flow [2023-01-27 22:51:49,657 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 105 transitions, 222 flow [2023-01-27 22:51:49,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 105 transitions, 222 flow [2023-01-27 22:51:49,711 INFO L130 PetriNetUnfolder]: 9/105 cut-off events. [2023-01-27 22:51:49,711 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:51:49,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 105 events. 9/105 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-27 22:51:49,720 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-01-27 22:51:53,122 INFO L134 LiptonReduction]: Checked pairs total: 467 [2023-01-27 22:51:53,122 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-01-27 22:51:53,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 22:51:53,140 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;@792f476f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 22:51:53,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 22:51:53,145 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-27 22:51:53,145 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:51:53,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:53,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:53,147 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 22:51:53,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:53,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1505763338, now seen corresponding path program 1 times [2023-01-27 22:51:53,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:53,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224063968] [2023-01-27 22:51:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:53,603 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 22:51:53,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:53,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224063968] [2023-01-27 22:51:53,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224063968] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:51:53,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:51:53,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 22:51:53,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968523599] [2023-01-27 22:51:53,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:51:53,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 22:51:53,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 22:51:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 22:51:53,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 224 [2023-01-27 22:51:53,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:53,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:53,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 224 [2023-01-27 22:51:53,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:53,698 INFO L130 PetriNetUnfolder]: 38/71 cut-off events. [2023-01-27 22:51:53,699 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-27 22:51:53,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 71 events. 38/71 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 133 event pairs, 9 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 100. Up to 37 conditions per place. [2023-01-27 22:51:53,700 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 19 selfloop transitions, 2 changer transitions 2/23 dead transitions. [2023-01-27 22:51:53,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 110 flow [2023-01-27 22:51:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 22:51:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 22:51:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-01-27 22:51:53,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47767857142857145 [2023-01-27 22:51:53,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-01-27 22:51:53,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-01-27 22:51:53,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:53,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-01-27 22:51:53,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:53,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:53,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:53,742 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 321 transitions. [2023-01-27 22:51:53,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 110 flow [2023-01-27 22:51:53,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 22:51:53,746 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 46 flow [2023-01-27 22:51:53,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-01-27 22:51:53,750 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-01-27 22:51:53,751 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 46 flow [2023-01-27 22:51:53,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:53,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:53,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:53,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 22:51:53,752 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 22:51:53,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:53,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1116336325, now seen corresponding path program 1 times [2023-01-27 22:51:53,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:53,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999750831] [2023-01-27 22:51:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:53,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:51:53,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:53,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999750831] [2023-01-27 22:51:53,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999750831] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:51:53,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:51:53,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 22:51:53,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651035347] [2023-01-27 22:51:53,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:51:53,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 22:51:53,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 22:51:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 22:51:53,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 224 [2023-01-27 22:51:53,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:53,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:53,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 224 [2023-01-27 22:51:53,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:54,012 INFO L130 PetriNetUnfolder]: 52/102 cut-off events. [2023-01-27 22:51:54,012 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-01-27 22:51:54,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 102 events. 52/102 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 257 event pairs, 17 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 135. Up to 74 conditions per place. [2023-01-27 22:51:54,014 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 18 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2023-01-27 22:51:54,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 117 flow [2023-01-27 22:51:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 22:51:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 22:51:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-01-27 22:51:54,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2023-01-27 22:51:54,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-01-27 22:51:54,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-01-27 22:51:54,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:54,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-01-27 22:51:54,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:54,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:54,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:54,021 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 46 flow. Second operand 3 states and 310 transitions. [2023-01-27 22:51:54,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 117 flow [2023-01-27 22:51:54,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 22:51:54,022 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 56 flow [2023-01-27 22:51:54,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-01-27 22:51:54,023 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-01-27 22:51:54,023 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 56 flow [2023-01-27 22:51:54,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:54,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:54,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:54,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 22:51:54,024 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 22:51:54,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:54,026 INFO L85 PathProgramCache]: Analyzing trace with hash -128502642, now seen corresponding path program 1 times [2023-01-27 22:51:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:54,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949181218] [2023-01-27 22:51:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:54,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:54,154 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 22:51:54,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:54,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949181218] [2023-01-27 22:51:54,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949181218] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:51:54,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:51:54,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 22:51:54,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209071435] [2023-01-27 22:51:54,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:51:54,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 22:51:54,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:54,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 22:51:54,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 22:51:54,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 224 [2023-01-27 22:51:54,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:54,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:54,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 224 [2023-01-27 22:51:54,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:54,249 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2023-01-27 22:51:54,250 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-01-27 22:51:54,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 130 events. 61/130 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 368 event pairs, 44 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 212. Up to 103 conditions per place. [2023-01-27 22:51:54,251 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-01-27 22:51:54,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 138 flow [2023-01-27 22:51:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:51:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:51:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2023-01-27 22:51:54,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42299107142857145 [2023-01-27 22:51:54,253 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2023-01-27 22:51:54,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2023-01-27 22:51:54,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:54,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2023-01-27 22:51:54,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:54,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:54,257 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:54,257 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 56 flow. Second operand 4 states and 379 transitions. [2023-01-27 22:51:54,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 138 flow [2023-01-27 22:51:54,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 22:51:54,258 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 68 flow [2023-01-27 22:51:54,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-01-27 22:51:54,259 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-01-27 22:51:54,259 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 68 flow [2023-01-27 22:51:54,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:54,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:54,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:54,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 22:51:54,260 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 22:51:54,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:54,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1064831031, now seen corresponding path program 1 times [2023-01-27 22:51:54,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:54,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054245658] [2023-01-27 22:51:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:54,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:51:54,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:54,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054245658] [2023-01-27 22:51:54,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054245658] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:54,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611162336] [2023-01-27 22:51:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:54,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:54,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:54,784 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 22:51:54,825 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 22:51:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:54,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 22:51:54,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:54,981 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 22:51:55,064 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 22:51:55,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:51:55,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-27 22:51:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:51:55,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:55,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:51:55,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2023-01-27 22:51:55,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:51:55,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 162 [2023-01-27 22:51:55,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:51:55,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 48 [2023-01-27 22:51:55,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-01-27 22:51:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:51:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611162336] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:55,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:55,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-01-27 22:51:55,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194617455] [2023-01-27 22:51:55,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:55,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 22:51:55,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:55,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 22:51:55,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-01-27 22:51:55,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 224 [2023-01-27 22:51:55,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 68 flow. Second operand has 17 states, 17 states have (on average 66.05882352941177) internal successors, (1123), 17 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:55,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:55,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 224 [2023-01-27 22:51:55,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:51:55,972 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_73 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) (= 5 c_~x~0)) is different from false [2023-01-27 22:51:58,079 WARN L539 Checker$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 22:51:58,486 INFO L130 PetriNetUnfolder]: 233/456 cut-off events. [2023-01-27 22:51:58,486 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2023-01-27 22:51:58,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 456 events. 233/456 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2005 event pairs, 35 based on Foata normal form. 3/455 useless extension candidates. Maximal degree in co-relation 1117. Up to 120 conditions per place. [2023-01-27 22:51:58,490 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 76 selfloop transitions, 30 changer transitions 24/130 dead transitions. [2023-01-27 22:51:58,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 130 transitions, 659 flow [2023-01-27 22:51:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 22:51:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 22:51:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1346 transitions. [2023-01-27 22:51:58,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31625939849624063 [2023-01-27 22:51:58,496 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1346 transitions. [2023-01-27 22:51:58,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1346 transitions. [2023-01-27 22:51:58,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:51:58,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1346 transitions. [2023-01-27 22:51:58,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:58,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 224.0) internal successors, (4480), 20 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:58,510 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 224.0) internal successors, (4480), 20 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:58,510 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 68 flow. Second operand 19 states and 1346 transitions. [2023-01-27 22:51:58,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 130 transitions, 659 flow [2023-01-27 22:51:58,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 130 transitions, 645 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-01-27 22:51:58,514 INFO L231 Difference]: Finished difference. Result has 45 places, 50 transitions, 300 flow [2023-01-27 22:51:58,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=300, PETRI_PLACES=45, PETRI_TRANSITIONS=50} [2023-01-27 22:51:58,515 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 26 predicate places. [2023-01-27 22:51:58,516 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 50 transitions, 300 flow [2023-01-27 22:51:58,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 66.05882352941177) internal successors, (1123), 17 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:58,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:51:58,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:51:58,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 22:51:58,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:58,721 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 22:51:58,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:51:58,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1849941358, now seen corresponding path program 2 times [2023-01-27 22:51:58,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:51:58,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720958192] [2023-01-27 22:51:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:51:58,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:51:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:51:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:51:59,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:51:59,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720958192] [2023-01-27 22:51:59,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720958192] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:51:59,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508293595] [2023-01-27 22:51:59,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:51:59,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:51:59,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:51:59,633 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 22:51:59,664 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 22:51:59,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:51:59,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:51:59,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-27 22:51:59,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:51:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:51:59,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:51:59,817 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:51:59,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-01-27 22:51:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:51:59,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508293595] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:51:59,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:51:59,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 9 [2023-01-27 22:51:59,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819972515] [2023-01-27 22:51:59,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:51:59,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 22:51:59,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:51:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 22:51:59,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-01-27 22:51:59,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-27 22:51:59,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 50 transitions, 300 flow. Second operand has 11 states, 11 states have (on average 73.72727272727273) internal successors, (811), 11 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:51:59,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:51:59,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-27 22:51:59,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:52:00,183 INFO L130 PetriNetUnfolder]: 373/712 cut-off events. [2023-01-27 22:52:00,183 INFO L131 PetriNetUnfolder]: For 1243/1243 co-relation queries the response was YES. [2023-01-27 22:52:00,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 712 events. 373/712 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3550 event pairs, 72 based on Foata normal form. 1/710 useless extension candidates. Maximal degree in co-relation 2123. Up to 250 conditions per place. [2023-01-27 22:52:00,188 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 55 selfloop transitions, 33 changer transitions 16/104 dead transitions. [2023-01-27 22:52:00,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 104 transitions, 749 flow [2023-01-27 22:52:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 22:52:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 22:52:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 777 transitions. [2023-01-27 22:52:00,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346875 [2023-01-27 22:52:00,192 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 777 transitions. [2023-01-27 22:52:00,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 777 transitions. [2023-01-27 22:52:00,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:52:00,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 777 transitions. [2023-01-27 22:52:00,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.7) internal successors, (777), 10 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:00,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:00,198 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:00,198 INFO L175 Difference]: Start difference. First operand has 45 places, 50 transitions, 300 flow. Second operand 10 states and 777 transitions. [2023-01-27 22:52:00,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 104 transitions, 749 flow [2023-01-27 22:52:00,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 104 transitions, 695 flow, removed 25 selfloop flow, removed 2 redundant places. [2023-01-27 22:52:00,206 INFO L231 Difference]: Finished difference. Result has 54 places, 62 transitions, 444 flow [2023-01-27 22:52:00,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=444, PETRI_PLACES=54, PETRI_TRANSITIONS=62} [2023-01-27 22:52:00,207 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 35 predicate places. [2023-01-27 22:52:00,207 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 62 transitions, 444 flow [2023-01-27 22:52:00,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 73.72727272727273) internal successors, (811), 11 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:00,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:52:00,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:52:00,219 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 22:52:00,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:00,420 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 22:52:00,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:52:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash -169763452, now seen corresponding path program 3 times [2023-01-27 22:52:00,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:52:00,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145365169] [2023-01-27 22:52:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:52:00,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:52:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:52:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:52:01,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:52:01,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145365169] [2023-01-27 22:52:01,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145365169] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:52:01,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989853387] [2023-01-27 22:52:01,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:52:01,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:01,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:52:01,009 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 22:52:01,011 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 22:52:01,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:52:01,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:52:01,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 22:52:01,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:52:01,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:52:01,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-27 22:52:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:52:01,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:52:01,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:52:01,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-01-27 22:52:01,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-01-27 22:52:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:52:01,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989853387] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:52:01,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:52:01,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 15 [2023-01-27 22:52:01,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187138150] [2023-01-27 22:52:01,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:52:01,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 22:52:01,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:52:01,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 22:52:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2023-01-27 22:52:01,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-27 22:52:01,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 62 transitions, 444 flow. Second operand has 17 states, 17 states have (on average 69.11764705882354) internal successors, (1175), 17 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:01,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:52:01,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-27 22:52:01,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:52:01,910 INFO L130 PetriNetUnfolder]: 429/819 cut-off events. [2023-01-27 22:52:01,910 INFO L131 PetriNetUnfolder]: For 2073/2073 co-relation queries the response was YES. [2023-01-27 22:52:01,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2915 conditions, 819 events. 429/819 cut-off events. For 2073/2073 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4239 event pairs, 106 based on Foata normal form. 1/818 useless extension candidates. Maximal degree in co-relation 2536. Up to 246 conditions per place. [2023-01-27 22:52:01,916 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 62 selfloop transitions, 30 changer transitions 21/113 dead transitions. [2023-01-27 22:52:01,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 113 transitions, 868 flow [2023-01-27 22:52:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 22:52:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 22:52:01,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 813 transitions. [2023-01-27 22:52:01,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3299512987012987 [2023-01-27 22:52:01,919 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 813 transitions. [2023-01-27 22:52:01,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 813 transitions. [2023-01-27 22:52:01,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:52:01,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 813 transitions. [2023-01-27 22:52:01,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 73.9090909090909) internal successors, (813), 11 states have internal predecessors, (813), 0 states have call successors, (0), 0 states 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 22:52:01,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states 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 22:52:01,927 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states 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 22:52:01,927 INFO L175 Difference]: Start difference. First operand has 54 places, 62 transitions, 444 flow. Second operand 11 states and 813 transitions. [2023-01-27 22:52:01,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 113 transitions, 868 flow [2023-01-27 22:52:01,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 113 transitions, 843 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-01-27 22:52:01,936 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 544 flow [2023-01-27 22:52:01,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=544, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2023-01-27 22:52:01,938 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 42 predicate places. [2023-01-27 22:52:01,938 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 544 flow [2023-01-27 22:52:01,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 69.11764705882354) internal successors, (1175), 17 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:01,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:52:01,939 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:52:01,957 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 22:52:02,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:02,152 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 22:52:02,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:52:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1698945970, now seen corresponding path program 4 times [2023-01-27 22:52:02,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:52:02,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667989379] [2023-01-27 22:52:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:52:02,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:52:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:52:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:52:02,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:52:02,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667989379] [2023-01-27 22:52:02,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667989379] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:52:02,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565019772] [2023-01-27 22:52:02,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:52:02,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:02,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:52:02,274 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 22:52:02,307 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 22:52:02,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:52:02,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:52:02,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:52:02,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:52:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:52:02,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:52:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:52:02,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565019772] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:52:02,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:52:02,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-01-27 22:52:02,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649176110] [2023-01-27 22:52:02,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:52:02,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 22:52:02,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:52:02,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 22:52:02,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-01-27 22:52:02,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2023-01-27 22:52:02,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 544 flow. Second operand has 8 states, 8 states have (on average 102.625) internal successors, (821), 8 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:02,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:52:02,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2023-01-27 22:52:02,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:52:02,633 INFO L130 PetriNetUnfolder]: 639/1236 cut-off events. [2023-01-27 22:52:02,633 INFO L131 PetriNetUnfolder]: For 4701/4701 co-relation queries the response was YES. [2023-01-27 22:52:02,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4606 conditions, 1236 events. 639/1236 cut-off events. For 4701/4701 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7100 event pairs, 183 based on Foata normal form. 42/1277 useless extension candidates. Maximal degree in co-relation 3793. Up to 548 conditions per place. [2023-01-27 22:52:02,640 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 62 selfloop transitions, 25 changer transitions 5/92 dead transitions. [2023-01-27 22:52:02,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 92 transitions, 936 flow [2023-01-27 22:52:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:52:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:52:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 429 transitions. [2023-01-27 22:52:02,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47879464285714285 [2023-01-27 22:52:02,642 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 429 transitions. [2023-01-27 22:52:02,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 429 transitions. [2023-01-27 22:52:02,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:52:02,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 429 transitions. [2023-01-27 22:52:02,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:02,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:02,646 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:02,646 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 544 flow. Second operand 4 states and 429 transitions. [2023-01-27 22:52:02,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 92 transitions, 936 flow [2023-01-27 22:52:02,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 92 transitions, 858 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-01-27 22:52:02,662 INFO L231 Difference]: Finished difference. Result has 54 places, 70 transitions, 692 flow [2023-01-27 22:52:02,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=692, PETRI_PLACES=54, PETRI_TRANSITIONS=70} [2023-01-27 22:52:02,663 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 35 predicate places. [2023-01-27 22:52:02,663 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 70 transitions, 692 flow [2023-01-27 22:52:02,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.625) internal successors, (821), 8 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:02,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:52:02,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:52:02,669 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 22:52:02,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:02,869 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 22:52:02,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:52:02,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1715728177, now seen corresponding path program 5 times [2023-01-27 22:52:02,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:52:02,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798889488] [2023-01-27 22:52:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:52:02,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:52:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:52:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:52:02,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:52:02,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798889488] [2023-01-27 22:52:02,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798889488] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:52:02,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652282603] [2023-01-27 22:52:02,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:52:02,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:02,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:52:02,974 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 22:52:02,983 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 22:52:03,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:52:03,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:52:03,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:52:03,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:52:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:52:03,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:52:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:52:03,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652282603] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:52:03,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:52:03,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-27 22:52:03,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366095499] [2023-01-27 22:52:03,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:52:03,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 22:52:03,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:52:03,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 22:52:03,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-27 22:52:03,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 224 [2023-01-27 22:52:03,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 70 transitions, 692 flow. Second operand has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:03,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:52:03,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 224 [2023-01-27 22:52:03,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:52:03,416 INFO L130 PetriNetUnfolder]: 446/885 cut-off events. [2023-01-27 22:52:03,416 INFO L131 PetriNetUnfolder]: For 3907/3907 co-relation queries the response was YES. [2023-01-27 22:52:03,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 885 events. 446/885 cut-off events. For 3907/3907 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4669 event pairs, 297 based on Foata normal form. 19/903 useless extension candidates. Maximal degree in co-relation 2175. Up to 754 conditions per place. [2023-01-27 22:52:03,421 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 49 selfloop transitions, 3 changer transitions 21/73 dead transitions. [2023-01-27 22:52:03,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 741 flow [2023-01-27 22:52:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 22:52:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 22:52:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 554 transitions. [2023-01-27 22:52:03,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41220238095238093 [2023-01-27 22:52:03,423 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 554 transitions. [2023-01-27 22:52:03,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 554 transitions. [2023-01-27 22:52:03,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:52:03,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 554 transitions. [2023-01-27 22:52:03,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.33333333333333) internal successors, (554), 6 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:03,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:03,427 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:03,427 INFO L175 Difference]: Start difference. First operand has 54 places, 70 transitions, 692 flow. Second operand 6 states and 554 transitions. [2023-01-27 22:52:03,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 741 flow [2023-01-27 22:52:03,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 725 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-01-27 22:52:03,434 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 484 flow [2023-01-27 22:52:03,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=484, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-01-27 22:52:03,436 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 38 predicate places. [2023-01-27 22:52:03,437 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 484 flow [2023-01-27 22:52:03,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:03,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:52:03,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:52:03,447 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 22:52:03,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:03,642 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 22:52:03,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:52:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash -876655132, now seen corresponding path program 6 times [2023-01-27 22:52:03,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:52:03,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152686757] [2023-01-27 22:52:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:52:03,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:52:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:52:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:52:04,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:52:04,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152686757] [2023-01-27 22:52:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152686757] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:52:04,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943407956] [2023-01-27 22:52:04,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:52:04,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:04,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:52:04,025 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 22:52:04,047 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 22:52:04,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 22:52:04,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:52:04,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-27 22:52:04,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:52:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:52:04,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:52:04,242 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-27 22:52:04,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-01-27 22:52:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:52:04,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943407956] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:52:04,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:52:04,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 13 [2023-01-27 22:52:04,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628785914] [2023-01-27 22:52:04,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:52:04,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 22:52:04,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:52:04,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 22:52:04,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-01-27 22:52:04,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-27 22:52:04,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 484 flow. Second operand has 15 states, 15 states have (on average 73.26666666666667) internal successors, (1099), 15 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:04,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:52:04,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-27 22:52:04,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:52:05,133 INFO L130 PetriNetUnfolder]: 748/1414 cut-off events. [2023-01-27 22:52:05,133 INFO L131 PetriNetUnfolder]: For 4545/4545 co-relation queries the response was YES. [2023-01-27 22:52:05,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5457 conditions, 1414 events. 748/1414 cut-off events. For 4545/4545 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8294 event pairs, 74 based on Foata normal form. 9/1422 useless extension candidates. Maximal degree in co-relation 5429. Up to 412 conditions per place. [2023-01-27 22:52:05,141 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 102 selfloop transitions, 63 changer transitions 79/244 dead transitions. [2023-01-27 22:52:05,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 244 transitions, 1867 flow [2023-01-27 22:52:05,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 22:52:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 22:52:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2212 transitions. [2023-01-27 22:52:05,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35267857142857145 [2023-01-27 22:52:05,148 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2212 transitions. [2023-01-27 22:52:05,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2212 transitions. [2023-01-27 22:52:05,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:52:05,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2212 transitions. [2023-01-27 22:52:05,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 79.0) internal successors, (2212), 28 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:05,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 224.0) internal successors, (6496), 29 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:05,165 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 224.0) internal successors, (6496), 29 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:05,165 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 484 flow. Second operand 28 states and 2212 transitions. [2023-01-27 22:52:05,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 244 transitions, 1867 flow [2023-01-27 22:52:05,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 244 transitions, 1801 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-01-27 22:52:05,174 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 1047 flow [2023-01-27 22:52:05,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1047, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2023-01-27 22:52:05,175 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 65 predicate places. [2023-01-27 22:52:05,175 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 1047 flow [2023-01-27 22:52:05,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.26666666666667) internal successors, (1099), 15 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:05,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:52:05,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:52:05,187 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 22:52:05,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:05,381 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 22:52:05,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:52:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1519550220, now seen corresponding path program 7 times [2023-01-27 22:52:05,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:52:05,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886580629] [2023-01-27 22:52:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:52:05,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:52:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:52:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:52:05,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:52:05,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886580629] [2023-01-27 22:52:05,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886580629] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:52:05,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9362161] [2023-01-27 22:52:05,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:52:05,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:05,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:52:05,825 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 22:52:05,850 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 22:52:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:52:05,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-27 22:52:05,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:52:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:52:06,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-27 22:52:06,297 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:52:06,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-27 22:52:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:52:06,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:52:06,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:52:06,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-27 22:52:06,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 22:52:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:52:06,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9362161] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:52:06,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:52:06,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-27 22:52:06,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222728834] [2023-01-27 22:52:06,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:52:06,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 22:52:06,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:52:06,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 22:52:06,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=605, Unknown=4, NotChecked=0, Total=702 [2023-01-27 22:52:06,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-27 22:52:06,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 1047 flow. Second operand has 27 states, 27 states have (on average 68.77777777777777) internal successors, (1857), 27 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:06,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:52:06,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-27 22:52:06,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:52:09,582 INFO L130 PetriNetUnfolder]: 1180/2203 cut-off events. [2023-01-27 22:52:09,582 INFO L131 PetriNetUnfolder]: For 11127/11127 co-relation queries the response was YES. [2023-01-27 22:52:09,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9239 conditions, 2203 events. 1180/2203 cut-off events. For 11127/11127 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13595 event pairs, 186 based on Foata normal form. 6/2208 useless extension candidates. Maximal degree in co-relation 8450. Up to 628 conditions per place. [2023-01-27 22:52:09,595 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 149 selfloop transitions, 74 changer transitions 32/255 dead transitions. [2023-01-27 22:52:09,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 255 transitions, 2697 flow [2023-01-27 22:52:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 22:52:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 22:52:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1797 transitions. [2023-01-27 22:52:09,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33426339285714285 [2023-01-27 22:52:09,602 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1797 transitions. [2023-01-27 22:52:09,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1797 transitions. [2023-01-27 22:52:09,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:52:09,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1797 transitions. [2023-01-27 22:52:09,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 74.875) internal successors, (1797), 24 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:09,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:09,616 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:09,616 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 1047 flow. Second operand 24 states and 1797 transitions. [2023-01-27 22:52:09,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 255 transitions, 2697 flow [2023-01-27 22:52:09,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 255 transitions, 2302 flow, removed 135 selfloop flow, removed 9 redundant places. [2023-01-27 22:52:09,642 INFO L231 Difference]: Finished difference. Result has 104 places, 130 transitions, 1538 flow [2023-01-27 22:52:09,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1538, PETRI_PLACES=104, PETRI_TRANSITIONS=130} [2023-01-27 22:52:09,643 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 85 predicate places. [2023-01-27 22:52:09,643 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 130 transitions, 1538 flow [2023-01-27 22:52:09,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.77777777777777) internal successors, (1857), 27 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:52:09,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:52:09,645 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:52:09,652 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 22:52:09,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:09,850 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 22:52:09,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:52:09,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2064568971, now seen corresponding path program 8 times [2023-01-27 22:52:09,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:52:09,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123244774] [2023-01-27 22:52:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:52:09,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:52:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:52:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:52:09,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:52:09,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123244774] [2023-01-27 22:52:09,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123244774] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:52:09,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105073912] [2023-01-27 22:52:09,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:52:09,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:09,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:52:09,970 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 22:52:09,996 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 22:52:10,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:52:10,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:52:10,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:52:10,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:52:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:52:10,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:52:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:52:10,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105073912] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:52:10,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:52:10,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 11 [2023-01-27 22:52:10,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403970250] [2023-01-27 22:52:10,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:52:10,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 22:52:10,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:52:10,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 22:52:10,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-01-27 22:52:10,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 224 [2023-01-27 22:52:10,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 130 transitions, 1538 flow. Second operand has 12 states, 12 states have (on average 98.5) internal successors, (1182), 12 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states 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 22:52:10,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:52:10,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 224 [2023-01-27 22:52:10,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:52:10,704 INFO L130 PetriNetUnfolder]: 2100/3909 cut-off events. [2023-01-27 22:52:10,704 INFO L131 PetriNetUnfolder]: For 17692/17692 co-relation queries the response was YES. [2023-01-27 22:52:10,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15901 conditions, 3909 events. 2100/3909 cut-off events. For 17692/17692 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27273 event pairs, 507 based on Foata normal form. 30/3938 useless extension candidates. Maximal degree in co-relation 15203. Up to 1736 conditions per place. [2023-01-27 22:52:10,728 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 125 selfloop transitions, 105 changer transitions 0/230 dead transitions. [2023-01-27 22:52:10,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 230 transitions, 3169 flow [2023-01-27 22:52:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 22:52:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 22:52:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 523 transitions. [2023-01-27 22:52:10,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669642857142857 [2023-01-27 22:52:10,729 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 523 transitions. [2023-01-27 22:52:10,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 523 transitions. [2023-01-27 22:52:10,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:52:10,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 523 transitions. [2023-01-27 22:52:10,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 22:52:10,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 22:52:10,733 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 22:52:10,733 INFO L175 Difference]: Start difference. First operand has 104 places, 130 transitions, 1538 flow. Second operand 5 states and 523 transitions. [2023-01-27 22:52:10,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 230 transitions, 3169 flow [2023-01-27 22:52:10,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 230 transitions, 2881 flow, removed 139 selfloop flow, removed 4 redundant places. [2023-01-27 22:52:10,789 INFO L231 Difference]: Finished difference. Result has 107 places, 203 transitions, 2736 flow [2023-01-27 22:52:10,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2736, PETRI_PLACES=107, PETRI_TRANSITIONS=203} [2023-01-27 22:52:10,790 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 88 predicate places. [2023-01-27 22:52:10,790 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 203 transitions, 2736 flow [2023-01-27 22:52:10,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.5) internal successors, (1182), 12 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states 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 22:52:10,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:52:10,791 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:52:10,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 22:52:10,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-27 22:52:10,996 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 22:52:10,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:52:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash -672308245, now seen corresponding path program 9 times [2023-01-27 22:52:10,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:52:10,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656402550] [2023-01-27 22:52:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:52:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:52:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:52:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:52:11,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:52:11,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656402550] [2023-01-27 22:52:11,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656402550] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:52:11,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870744134] [2023-01-27 22:52:11,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:52:11,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:52:11,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:52:11,808 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 22:52:11,814 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 22:52:11,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:52:11,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:52:12,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 26 conjunts are in the unsatisfiable core [2023-01-27 22:52:12,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:52:12,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:52:12,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-27 22:52:12,215 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:52:12,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-27 22:52:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:52:12,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:52:12,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:52:12,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-01-27 22:52:12,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-01-27 22:52:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:52:12,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870744134] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:52:12,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:52:12,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2023-01-27 22:52:12,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216044438] [2023-01-27 22:52:12,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:52:12,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 22:52:12,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:52:12,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 22:52:12,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-01-27 22:52:12,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-27 22:52:12,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 203 transitions, 2736 flow. Second operand has 24 states, 24 states have (on average 68.625) internal successors, (1647), 24 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states 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 22:52:12,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:52:12,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-27 22:52:12,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:52:17,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:52:19,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:52:21,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 22:52:23,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:52:25,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:52:27,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:52:29,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:52:31,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:52:33,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:52:35,556 WARN L539 Checker$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 22:52:37,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 22:52:43,710 WARN L539 Checker$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 22:52:47,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:52:49,827 WARN L539 Checker$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 22:52:51,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 22:52:53,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:52:55,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:52:57,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:53:02,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:53:04,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:53:06,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:53:10,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:53:16,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:53:19,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:53:21,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-27 22:53:22,491 INFO L130 PetriNetUnfolder]: 2884/5323 cut-off events. [2023-01-27 22:53:22,491 INFO L131 PetriNetUnfolder]: For 27253/27253 co-relation queries the response was YES. [2023-01-27 22:53:22,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22144 conditions, 5323 events. 2884/5323 cut-off events. For 27253/27253 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 38981 event pairs, 297 based on Foata normal form. 22/5344 useless extension candidates. Maximal degree in co-relation 21868. Up to 1515 conditions per place. [2023-01-27 22:53:22,508 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 21 selfloop transitions, 11 changer transitions 381/413 dead transitions. [2023-01-27 22:53:22,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 413 transitions, 4958 flow [2023-01-27 22:53:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 22:53:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 22:53:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1947 transitions. [2023-01-27 22:53:22,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33430631868131866 [2023-01-27 22:53:22,518 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1947 transitions. [2023-01-27 22:53:22,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1947 transitions. [2023-01-27 22:53:22,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:53:22,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1947 transitions. [2023-01-27 22:53:22,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 74.88461538461539) internal successors, (1947), 26 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states 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 22:53:22,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 224.0) internal successors, (6048), 27 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 22:53:22,541 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 224.0) internal successors, (6048), 27 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 22:53:22,541 INFO L175 Difference]: Start difference. First operand has 107 places, 203 transitions, 2736 flow. Second operand 26 states and 1947 transitions. [2023-01-27 22:53:22,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 413 transitions, 4958 flow [2023-01-27 22:53:22,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 413 transitions, 4774 flow, removed 92 selfloop flow, removed 0 redundant places. [2023-01-27 22:53:22,613 INFO L231 Difference]: Finished difference. Result has 141 places, 26 transitions, 286 flow [2023-01-27 22:53:22,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=286, PETRI_PLACES=141, PETRI_TRANSITIONS=26} [2023-01-27 22:53:22,614 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 122 predicate places. [2023-01-27 22:53:22,614 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 26 transitions, 286 flow [2023-01-27 22:53:22,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.625) internal successors, (1647), 24 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states 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 22:53:22,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:53:22,615 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:53:22,620 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 22:53:22,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:53:22,820 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 22:53:22,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:53:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash -831556684, now seen corresponding path program 10 times [2023-01-27 22:53:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:53:22,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912107871] [2023-01-27 22:53:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:53:22,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:53:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:53:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:53:23,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:53:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912107871] [2023-01-27 22:53:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912107871] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:53:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981046723] [2023-01-27 22:53:23,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:53:23,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:53:23,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:53:23,789 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 22:53:23,791 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 22:53:23,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:53:23,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:53:23,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 22:53:23,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:53:24,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:53:24,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-27 22:53:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 22:53:24,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:53:24,245 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_387 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_387) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2023-01-27 22:53:24,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:53:24,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-27 22:53:24,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 22:53:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 6 not checked. [2023-01-27 22:53:24,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981046723] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:53:24,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:53:24,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 27 [2023-01-27 22:53:24,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904366650] [2023-01-27 22:53:24,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:53:24,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 22:53:24,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:53:24,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 22:53:24,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=684, Unknown=1, NotChecked=52, Total=812 [2023-01-27 22:53:24,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-27 22:53:24,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 26 transitions, 286 flow. Second operand has 29 states, 29 states have (on average 68.72413793103448) internal successors, (1993), 29 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states 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 22:53:24,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:53:24,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-27 22:53:24,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:53:26,148 INFO L130 PetriNetUnfolder]: 363/689 cut-off events. [2023-01-27 22:53:26,148 INFO L131 PetriNetUnfolder]: For 8163/8163 co-relation queries the response was YES. [2023-01-27 22:53:26,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3518 conditions, 689 events. 363/689 cut-off events. For 8163/8163 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2983 event pairs, 12 based on Foata normal form. 8/695 useless extension candidates. Maximal degree in co-relation 3475. Up to 203 conditions per place. [2023-01-27 22:53:26,152 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 122 selfloop transitions, 46 changer transitions 28/196 dead transitions. [2023-01-27 22:53:26,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 196 transitions, 2089 flow [2023-01-27 22:53:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-27 22:53:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-27 22:53:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2410 transitions. [2023-01-27 22:53:26,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32602813852813856 [2023-01-27 22:53:26,157 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2410 transitions. [2023-01-27 22:53:26,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2410 transitions. [2023-01-27 22:53:26,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:53:26,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2410 transitions. [2023-01-27 22:53:26,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 73.03030303030303) internal successors, (2410), 33 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states 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 22:53:26,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:53:26,168 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:53:26,168 INFO L175 Difference]: Start difference. First operand has 141 places, 26 transitions, 286 flow. Second operand 33 states and 2410 transitions. [2023-01-27 22:53:26,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 196 transitions, 2089 flow [2023-01-27 22:53:26,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 196 transitions, 1303 flow, removed 342 selfloop flow, removed 47 redundant places. [2023-01-27 22:53:26,178 INFO L231 Difference]: Finished difference. Result has 79 places, 67 transitions, 704 flow [2023-01-27 22:53:26,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=704, PETRI_PLACES=79, PETRI_TRANSITIONS=67} [2023-01-27 22:53:26,179 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 60 predicate places. [2023-01-27 22:53:26,179 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 67 transitions, 704 flow [2023-01-27 22:53:26,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 68.72413793103448) internal successors, (1993), 29 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states 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 22:53:26,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:53:26,180 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:53:26,185 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 22:53:26,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-27 22:53:26,384 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 22:53:26,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:53:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash -8903775, now seen corresponding path program 11 times [2023-01-27 22:53:26,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:53:26,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94020607] [2023-01-27 22:53:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:53:26,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:53:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:53:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:53:27,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:53:27,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94020607] [2023-01-27 22:53:27,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94020607] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:53:27,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544523974] [2023-01-27 22:53:27,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:53:27,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:53:27,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:53:27,048 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 22:53:27,078 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 22:53:27,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:53:27,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:53:27,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-27 22:53:27,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:53:27,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:53:27,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-27 22:53:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:53:27,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:53:27,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:53:27,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-27 22:53:27,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 22:53:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:53:28,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544523974] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:53:28,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:53:28,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-01-27 22:53:28,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313733048] [2023-01-27 22:53:28,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:53:28,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-27 22:53:28,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:53:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-27 22:53:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1494, Unknown=3, NotChecked=0, Total=1722 [2023-01-27 22:53:28,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-27 22:53:28,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 67 transitions, 704 flow. Second operand has 42 states, 42 states have (on average 68.5) internal successors, (2877), 42 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states 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 22:53:28,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:53:28,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-27 22:53:28,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:53:31,615 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 22:53:34,511 INFO L130 PetriNetUnfolder]: 980/1826 cut-off events. [2023-01-27 22:53:34,511 INFO L131 PetriNetUnfolder]: For 8011/8011 co-relation queries the response was YES. [2023-01-27 22:53:34,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7590 conditions, 1826 events. 980/1826 cut-off events. For 8011/8011 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10266 event pairs, 28 based on Foata normal form. 13/1832 useless extension candidates. Maximal degree in co-relation 7567. Up to 574 conditions per place. [2023-01-27 22:53:34,520 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 311 selfloop transitions, 118 changer transitions 82/511 dead transitions. [2023-01-27 22:53:34,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 511 transitions, 4048 flow [2023-01-27 22:53:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-01-27 22:53:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-01-27 22:53:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 5195 transitions. [2023-01-27 22:53:34,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3313137755102041 [2023-01-27 22:53:34,529 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 5195 transitions. [2023-01-27 22:53:34,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 5195 transitions. [2023-01-27 22:53:34,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:53:34,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 5195 transitions. [2023-01-27 22:53:34,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 74.21428571428571) internal successors, (5195), 70 states have internal predecessors, (5195), 0 states have call successors, (0), 0 states 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 22:53:34,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 224.0) internal successors, (15904), 71 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states 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 22:53:34,577 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 224.0) internal successors, (15904), 71 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states 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 22:53:34,577 INFO L175 Difference]: Start difference. First operand has 79 places, 67 transitions, 704 flow. Second operand 70 states and 5195 transitions. [2023-01-27 22:53:34,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 511 transitions, 4048 flow [2023-01-27 22:53:34,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 511 transitions, 3118 flow, removed 441 selfloop flow, removed 12 redundant places. [2023-01-27 22:53:34,592 INFO L231 Difference]: Finished difference. Result has 151 places, 152 transitions, 1287 flow [2023-01-27 22:53:34,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=1287, PETRI_PLACES=151, PETRI_TRANSITIONS=152} [2023-01-27 22:53:34,593 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 132 predicate places. [2023-01-27 22:53:34,593 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 152 transitions, 1287 flow [2023-01-27 22:53:34,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 68.5) internal successors, (2877), 42 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states 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 22:53:34,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:53:34,594 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:53:34,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-27 22:53:34,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 22:53:34,799 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 22:53:34,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:53:34,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1692361028, now seen corresponding path program 12 times [2023-01-27 22:53:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:53:34,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698244111] [2023-01-27 22:53:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:53:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:53:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:53:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:53:35,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:53:35,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698244111] [2023-01-27 22:53:35,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698244111] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:53:35,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541845383] [2023-01-27 22:53:35,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:53:35,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:53:35,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:53:35,484 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 22:53:35,511 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 22:53:35,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:53:35,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:53:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 22:53:35,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:53:35,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:53:35,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-27 22:53:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:53:36,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:53:36,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:53:36,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-27 22:53:36,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 22:53:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:53:36,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541845383] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:53:36,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:53:36,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-27 22:53:36,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952951893] [2023-01-27 22:53:36,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:53:36,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-27 22:53:36,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:53:36,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-27 22:53:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1754, Unknown=6, NotChecked=0, Total=1980 [2023-01-27 22:53:36,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-27 22:53:36,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 152 transitions, 1287 flow. Second operand has 45 states, 45 states have (on average 68.46666666666667) internal successors, (3081), 45 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:53:36,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:53:36,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-27 22:53:36,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:53:37,947 WARN L839 $PredicateComparison]: unable to prove that (and (= 5 c_~x~0) (forall ((v_ArrVal_473 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_473) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12))))) is different from false [2023-01-27 22:53:47,202 INFO L130 PetriNetUnfolder]: 2286/4210 cut-off events. [2023-01-27 22:53:47,203 INFO L131 PetriNetUnfolder]: For 17952/17952 co-relation queries the response was YES. [2023-01-27 22:53:47,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14186 conditions, 4210 events. 2286/4210 cut-off events. For 17952/17952 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 27610 event pairs, 109 based on Foata normal form. 17/4226 useless extension candidates. Maximal degree in co-relation 14151. Up to 854 conditions per place. [2023-01-27 22:53:47,265 INFO L137 encePairwiseOnDemand]: 214/224 looper letters, 607 selfloop transitions, 248 changer transitions 195/1050 dead transitions. [2023-01-27 22:53:47,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1050 transitions, 7367 flow [2023-01-27 22:53:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-01-27 22:53:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2023-01-27 22:53:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 9781 transitions. [2023-01-27 22:53:47,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.333321973827699 [2023-01-27 22:53:47,279 INFO L72 ComplementDD]: Start complementDD. Operand 131 states and 9781 transitions. [2023-01-27 22:53:47,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 131 states and 9781 transitions. [2023-01-27 22:53:47,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:53:47,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 131 states and 9781 transitions. [2023-01-27 22:53:47,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 132 states, 131 states have (on average 74.66412213740458) internal successors, (9781), 131 states have internal predecessors, (9781), 0 states have call successors, (0), 0 states 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 22:53:47,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 132 states, 132 states have (on average 224.0) internal successors, (29568), 132 states have internal predecessors, (29568), 0 states have call successors, (0), 0 states 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 22:53:47,331 INFO L81 ComplementDD]: Finished complementDD. Result has 132 states, 132 states have (on average 224.0) internal successors, (29568), 132 states have internal predecessors, (29568), 0 states have call successors, (0), 0 states 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 22:53:47,332 INFO L175 Difference]: Start difference. First operand has 151 places, 152 transitions, 1287 flow. Second operand 131 states and 9781 transitions. [2023-01-27 22:53:47,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1050 transitions, 7367 flow [2023-01-27 22:53:47,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 1050 transitions, 6849 flow, removed 134 selfloop flow, removed 21 redundant places. [2023-01-27 22:53:47,385 INFO L231 Difference]: Finished difference. Result has 278 places, 297 transitions, 2759 flow [2023-01-27 22:53:47,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=2759, PETRI_PLACES=278, PETRI_TRANSITIONS=297} [2023-01-27 22:53:47,386 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 259 predicate places. [2023-01-27 22:53:47,386 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 297 transitions, 2759 flow [2023-01-27 22:53:47,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 68.46666666666667) internal successors, (3081), 45 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:53:47,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:53:47,387 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:53:47,395 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 22:53:47,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 22:53:47,593 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 22:53:47,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:53:47,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1017332087, now seen corresponding path program 13 times [2023-01-27 22:53:47,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:53:47,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521812341] [2023-01-27 22:53:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:53:47,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:53:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:53:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:53:48,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:53:48,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521812341] [2023-01-27 22:53:48,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521812341] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:53:48,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357814397] [2023-01-27 22:53:48,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:53:48,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:53:48,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:53:48,661 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 22:53:48,687 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 22:53:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:53:48,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-27 22:53:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:53:49,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:53:49,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-27 22:53:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:53:49,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:53:49,276 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_520 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_520) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)) 5)) is different from false [2023-01-27 22:53:49,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:53:49,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-27 22:53:49,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 22:53:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 4 not checked. [2023-01-27 22:53:49,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357814397] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:53:49,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:53:49,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 11] total 36 [2023-01-27 22:53:49,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170738925] [2023-01-27 22:53:49,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:53:49,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-27 22:53:49,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:53:49,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-27 22:53:49,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1226, Unknown=1, NotChecked=70, Total=1406 [2023-01-27 22:53:49,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-27 22:53:49,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 297 transitions, 2759 flow. Second operand has 38 states, 38 states have (on average 68.5) internal successors, (2603), 38 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states 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 22:53:49,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:53:49,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-27 22:53:49,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:53:51,581 INFO L130 PetriNetUnfolder]: 3200/5874 cut-off events. [2023-01-27 22:53:51,581 INFO L131 PetriNetUnfolder]: For 33829/33829 co-relation queries the response was YES. [2023-01-27 22:53:51,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23320 conditions, 5874 events. 3200/5874 cut-off events. For 33829/33829 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 40087 event pairs, 682 based on Foata normal form. 5/5879 useless extension candidates. Maximal degree in co-relation 23267. Up to 3266 conditions per place. [2023-01-27 22:53:51,613 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 340 selfloop transitions, 123 changer transitions 27/490 dead transitions. [2023-01-27 22:53:51,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 490 transitions, 5143 flow [2023-01-27 22:53:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 22:53:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 22:53:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1861 transitions. [2023-01-27 22:53:51,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31953983516483514 [2023-01-27 22:53:51,621 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1861 transitions. [2023-01-27 22:53:51,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1861 transitions. [2023-01-27 22:53:51,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:53:51,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1861 transitions. [2023-01-27 22:53:51,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 71.57692307692308) internal successors, (1861), 26 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states 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 22:53:51,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 224.0) internal successors, (6048), 27 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 22:53:51,633 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 224.0) internal successors, (6048), 27 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 22:53:51,634 INFO L175 Difference]: Start difference. First operand has 278 places, 297 transitions, 2759 flow. Second operand 26 states and 1861 transitions. [2023-01-27 22:53:51,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 490 transitions, 5143 flow [2023-01-27 22:53:51,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 490 transitions, 4492 flow, removed 131 selfloop flow, removed 52 redundant places. [2023-01-27 22:53:51,810 INFO L231 Difference]: Finished difference. Result has 253 places, 360 transitions, 3305 flow [2023-01-27 22:53:51,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3305, PETRI_PLACES=253, PETRI_TRANSITIONS=360} [2023-01-27 22:53:51,811 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 234 predicate places. [2023-01-27 22:53:51,811 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 360 transitions, 3305 flow [2023-01-27 22:53:51,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 68.5) internal successors, (2603), 38 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states 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 22:53:51,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:53:51,812 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:53:51,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-27 22:53:52,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 22:53:52,017 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 22:53:52,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:53:52,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1517948549, now seen corresponding path program 14 times [2023-01-27 22:53:52,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:53:52,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889228362] [2023-01-27 22:53:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:53:52,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:53:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:53:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 22:53:52,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:53:52,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889228362] [2023-01-27 22:53:52,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889228362] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:53:52,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969298658] [2023-01-27 22:53:52,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:53:52,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:53:52,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:53:52,163 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 22:53:52,180 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 22:53:52,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:53:52,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:53:52,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 22:53:52,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:53:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 22:53:52,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:53:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 22:53:52,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969298658] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:53:52,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:53:52,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10] total 16 [2023-01-27 22:53:52,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626886334] [2023-01-27 22:53:52,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:53:52,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 22:53:52,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:53:52,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 22:53:52,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-01-27 22:53:52,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2023-01-27 22:53:52,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 360 transitions, 3305 flow. Second operand has 17 states, 17 states have (on average 100.70588235294117) internal successors, (1712), 17 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states 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 22:53:52,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:53:52,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2023-01-27 22:53:52,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:53:54,369 INFO L130 PetriNetUnfolder]: 5150/9553 cut-off events. [2023-01-27 22:53:54,369 INFO L131 PetriNetUnfolder]: For 78224/78224 co-relation queries the response was YES. [2023-01-27 22:53:54,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39149 conditions, 9553 events. 5150/9553 cut-off events. For 78224/78224 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 73663 event pairs, 1927 based on Foata normal form. 54/9607 useless extension candidates. Maximal degree in co-relation 39093. Up to 5968 conditions per place. [2023-01-27 22:53:54,461 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 382 selfloop transitions, 219 changer transitions 9/610 dead transitions. [2023-01-27 22:53:54,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 610 transitions, 7251 flow [2023-01-27 22:53:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 22:53:54,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 22:53:54,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 748 transitions. [2023-01-27 22:53:54,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4770408163265306 [2023-01-27 22:53:54,462 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 748 transitions. [2023-01-27 22:53:54,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 748 transitions. [2023-01-27 22:53:54,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:53:54,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 748 transitions. [2023-01-27 22:53:54,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.85714285714286) internal successors, (748), 7 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 22:53:54,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:53:54,465 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:53:54,465 INFO L175 Difference]: Start difference. First operand has 253 places, 360 transitions, 3305 flow. Second operand 7 states and 748 transitions. [2023-01-27 22:53:54,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 610 transitions, 7251 flow [2023-01-27 22:53:54,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 610 transitions, 7053 flow, removed 76 selfloop flow, removed 10 redundant places. [2023-01-27 22:53:54,816 INFO L231 Difference]: Finished difference. Result has 254 places, 561 transitions, 6288 flow [2023-01-27 22:53:54,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=3203, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6288, PETRI_PLACES=254, PETRI_TRANSITIONS=561} [2023-01-27 22:53:54,817 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 235 predicate places. [2023-01-27 22:53:54,818 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 561 transitions, 6288 flow [2023-01-27 22:53:54,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 100.70588235294117) internal successors, (1712), 17 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states 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 22:53:54,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:53:54,818 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:53:54,827 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 22:53:55,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:53:55,029 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 22:53:55,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:53:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash -594648632, now seen corresponding path program 15 times [2023-01-27 22:53:55,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:53:55,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173092431] [2023-01-27 22:53:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:53:55,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:53:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:53:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 22:53:55,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:53:55,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173092431] [2023-01-27 22:53:55,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173092431] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:53:55,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66589448] [2023-01-27 22:53:55,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:53:55,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:53:55,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:53:55,232 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 22:53:55,235 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 22:53:55,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:53:55,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:53:55,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 22:53:55,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:53:55,785 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:53:55,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-27 22:53:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 22:53:55,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:53:55,943 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:53:55,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-01-27 22:53:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 22:53:56,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66589448] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:53:56,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:53:56,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-01-27 22:53:56,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656307617] [2023-01-27 22:53:56,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:53:56,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 22:53:56,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:53:56,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 22:53:56,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2023-01-27 22:53:56,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 224 [2023-01-27 22:53:56,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 561 transitions, 6288 flow. Second operand has 31 states, 31 states have (on average 74.80645161290323) internal successors, (2319), 31 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states 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 22:53:56,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:53:56,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 224 [2023-01-27 22:53:56,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:53:57,240 INFO L130 PetriNetUnfolder]: 1166/2220 cut-off events. [2023-01-27 22:53:57,240 INFO L131 PetriNetUnfolder]: For 12825/12825 co-relation queries the response was YES. [2023-01-27 22:53:57,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10356 conditions, 2220 events. 1166/2220 cut-off events. For 12825/12825 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13059 event pairs, 288 based on Foata normal form. 22/2242 useless extension candidates. Maximal degree in co-relation 10294. Up to 1777 conditions per place. [2023-01-27 22:53:57,249 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 121 selfloop transitions, 20 changer transitions 51/192 dead transitions. [2023-01-27 22:53:57,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 192 transitions, 2490 flow [2023-01-27 22:53:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 22:53:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 22:53:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1545 transitions. [2023-01-27 22:53:57,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34486607142857145 [2023-01-27 22:53:57,251 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1545 transitions. [2023-01-27 22:53:57,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1545 transitions. [2023-01-27 22:53:57,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:53:57,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1545 transitions. [2023-01-27 22:53:57,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 77.25) internal successors, (1545), 20 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states 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 22:53:57,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 224.0) internal successors, (4704), 21 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:53:57,256 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 224.0) internal successors, (4704), 21 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:53:57,256 INFO L175 Difference]: Start difference. First operand has 254 places, 561 transitions, 6288 flow. Second operand 20 states and 1545 transitions. [2023-01-27 22:53:57,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 192 transitions, 2490 flow [2023-01-27 22:53:57,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 2338 flow, removed 46 selfloop flow, removed 33 redundant places. [2023-01-27 22:53:57,289 INFO L231 Difference]: Finished difference. Result has 132 places, 134 transitions, 1710 flow [2023-01-27 22:53:57,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1710, PETRI_PLACES=132, PETRI_TRANSITIONS=134} [2023-01-27 22:53:57,289 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 113 predicate places. [2023-01-27 22:53:57,289 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 134 transitions, 1710 flow [2023-01-27 22:53:57,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 74.80645161290323) internal successors, (2319), 31 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states 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 22:53:57,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:53:57,290 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:53:57,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 22:53:57,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 22:53:57,495 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 22:53:57,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:53:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash 882289853, now seen corresponding path program 16 times [2023-01-27 22:53:57,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:53:57,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906957289] [2023-01-27 22:53:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:53:57,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:53:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:53:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:53:58,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:53:58,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906957289] [2023-01-27 22:53:58,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906957289] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:53:58,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057795536] [2023-01-27 22:53:58,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:53:58,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:53:58,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:53:58,408 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 22:53:58,414 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 22:53:58,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:53:58,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:53:58,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-27 22:53:58,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:53:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:53:59,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-27 22:53:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:53:59,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:53:59,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:53:59,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-27 22:53:59,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 22:54:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:00,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057795536] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:54:00,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:54:00,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-01-27 22:54:00,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099179863] [2023-01-27 22:54:00,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:54:00,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-01-27 22:54:00,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:54:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-01-27 22:54:00,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2552, Unknown=6, NotChecked=0, Total=2862 [2023-01-27 22:54:00,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-27 22:54:00,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 134 transitions, 1710 flow. Second operand has 54 states, 54 states have (on average 68.38888888888889) internal successors, (3693), 54 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:54:00,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:54:00,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-27 22:54:00,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:54:01,636 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_651 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))) (= 5 c_~x~0)) is different from false [2023-01-27 22:54:04,022 WARN L539 Checker$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 22:54:26,553 INFO L130 PetriNetUnfolder]: 7269/13364 cut-off events. [2023-01-27 22:54:26,553 INFO L131 PetriNetUnfolder]: For 51943/51943 co-relation queries the response was YES. [2023-01-27 22:54:26,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60242 conditions, 13364 events. 7269/13364 cut-off events. For 51943/51943 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 107355 event pairs, 506 based on Foata normal form. 74/13438 useless extension candidates. Maximal degree in co-relation 60204. Up to 6483 conditions per place. [2023-01-27 22:54:26,608 INFO L137 encePairwiseOnDemand]: 213/224 looper letters, 1301 selfloop transitions, 714 changer transitions 277/2292 dead transitions. [2023-01-27 22:54:26,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 2292 transitions, 21927 flow [2023-01-27 22:54:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2023-01-27 22:54:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2023-01-27 22:54:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 17773 transitions. [2023-01-27 22:54:26,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3362023305084746 [2023-01-27 22:54:26,626 INFO L72 ComplementDD]: Start complementDD. Operand 236 states and 17773 transitions. [2023-01-27 22:54:26,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 236 states and 17773 transitions. [2023-01-27 22:54:26,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:54:26,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 236 states and 17773 transitions. [2023-01-27 22:54:26,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 237 states, 236 states have (on average 75.30932203389831) internal successors, (17773), 236 states have internal predecessors, (17773), 0 states have call successors, (0), 0 states 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 22:54:26,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 237 states, 237 states have (on average 224.0) internal successors, (53088), 237 states have internal predecessors, (53088), 0 states have call successors, (0), 0 states 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 22:54:26,696 INFO L81 ComplementDD]: Finished complementDD. Result has 237 states, 237 states have (on average 224.0) internal successors, (53088), 237 states have internal predecessors, (53088), 0 states have call successors, (0), 0 states 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 22:54:26,696 INFO L175 Difference]: Start difference. First operand has 132 places, 134 transitions, 1710 flow. Second operand 236 states and 17773 transitions. [2023-01-27 22:54:26,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 2292 transitions, 21927 flow [2023-01-27 22:54:26,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 2292 transitions, 21316 flow, removed 252 selfloop flow, removed 15 redundant places. [2023-01-27 22:54:26,811 INFO L231 Difference]: Finished difference. Result has 423 places, 871 transitions, 13566 flow [2023-01-27 22:54:26,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=236, PETRI_FLOW=13566, PETRI_PLACES=423, PETRI_TRANSITIONS=871} [2023-01-27 22:54:26,812 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 404 predicate places. [2023-01-27 22:54:26,812 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 871 transitions, 13566 flow [2023-01-27 22:54:26,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 68.38888888888889) internal successors, (3693), 54 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:54:26,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:54:26,812 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:54:26,817 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 22:54:27,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:54:27,013 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 22:54:27,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:54:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash -340979801, now seen corresponding path program 17 times [2023-01-27 22:54:27,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:54:27,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244177710] [2023-01-27 22:54:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:54:27,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:54:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:54:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:27,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:54:27,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244177710] [2023-01-27 22:54:27,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244177710] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:54:27,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991195008] [2023-01-27 22:54:27,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:54:27,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:54:27,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:54:27,708 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 22:54:27,709 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 22:54:27,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-01-27 22:54:27,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:54:27,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 22:54:27,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:54:28,033 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 22:54:28,079 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 22:54:28,212 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 22:54:28,587 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:54:28,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-27 22:54:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:28,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:54:29,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:54:29,444 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 61 treesize of output 49 [2023-01-27 22:54:29,457 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-27 22:54:29,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 279 [2023-01-27 22:54:29,472 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 22:54:29,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 80 [2023-01-27 22:54:29,486 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-01-27 22:54:29,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 67 [2023-01-27 22:54:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:29,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991195008] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:54:29,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:54:29,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 51 [2023-01-27 22:54:29,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156783298] [2023-01-27 22:54:29,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:54:29,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-01-27 22:54:29,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:54:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-01-27 22:54:29,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2335, Unknown=1, NotChecked=0, Total=2756 [2023-01-27 22:54:29,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 224 [2023-01-27 22:54:29,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 871 transitions, 13566 flow. Second operand has 53 states, 53 states have (on average 65.41509433962264) internal successors, (3467), 53 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:54:29,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:54:29,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 224 [2023-01-27 22:54:29,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:54:34,189 INFO L130 PetriNetUnfolder]: 2152/4085 cut-off events. [2023-01-27 22:54:34,189 INFO L131 PetriNetUnfolder]: For 84248/84248 co-relation queries the response was YES. [2023-01-27 22:54:34,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24070 conditions, 4085 events. 2152/4085 cut-off events. For 84248/84248 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 26917 event pairs, 550 based on Foata normal form. 92/4177 useless extension candidates. Maximal degree in co-relation 23945. Up to 2988 conditions per place. [2023-01-27 22:54:34,219 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 252 selfloop transitions, 66 changer transitions 70/388 dead transitions. [2023-01-27 22:54:34,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 388 transitions, 5648 flow [2023-01-27 22:54:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 22:54:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 22:54:34,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2439 transitions. [2023-01-27 22:54:34,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3110969387755102 [2023-01-27 22:54:34,222 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2439 transitions. [2023-01-27 22:54:34,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2439 transitions. [2023-01-27 22:54:34,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:54:34,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2439 transitions. [2023-01-27 22:54:34,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 69.68571428571428) internal successors, (2439), 35 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:54:34,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 224.0) internal successors, (8064), 36 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states 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 22:54:34,231 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 224.0) internal successors, (8064), 36 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states 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 22:54:34,231 INFO L175 Difference]: Start difference. First operand has 423 places, 871 transitions, 13566 flow. Second operand 35 states and 2439 transitions. [2023-01-27 22:54:34,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 388 transitions, 5648 flow [2023-01-27 22:54:34,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 388 transitions, 5009 flow, removed 271 selfloop flow, removed 92 redundant places. [2023-01-27 22:54:34,410 INFO L231 Difference]: Finished difference. Result has 182 places, 250 transitions, 3702 flow [2023-01-27 22:54:34,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=3526, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3702, PETRI_PLACES=182, PETRI_TRANSITIONS=250} [2023-01-27 22:54:34,410 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 163 predicate places. [2023-01-27 22:54:34,411 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 250 transitions, 3702 flow [2023-01-27 22:54:34,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 65.41509433962264) internal successors, (3467), 53 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:54:34,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:54:34,411 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:54:34,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 22:54:34,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:54:34,612 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 22:54:34,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:54:34,612 INFO L85 PathProgramCache]: Analyzing trace with hash 593329063, now seen corresponding path program 18 times [2023-01-27 22:54:34,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:54:34,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846797002] [2023-01-27 22:54:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:54:34,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:54:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:54:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:35,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:54:35,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846797002] [2023-01-27 22:54:35,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846797002] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:54:35,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681317344] [2023-01-27 22:54:35,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:54:35,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:54:35,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:54:35,323 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 22:54:35,326 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 22:54:35,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 22:54:35,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:54:35,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 22:54:35,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:54:35,962 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:54:35,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-27 22:54:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:54:35,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:54:36,202 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:54:36,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-01-27 22:54:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 22:54:36,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681317344] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:54:36,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:54:36,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 40 [2023-01-27 22:54:36,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580610136] [2023-01-27 22:54:36,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:54:36,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-27 22:54:36,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:54:36,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-27 22:54:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1424, Unknown=0, NotChecked=0, Total=1722 [2023-01-27 22:54:36,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-27 22:54:36,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 250 transitions, 3702 flow. Second operand has 42 states, 42 states have (on average 72.52380952380952) internal successors, (3046), 42 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states 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 22:54:36,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:54:36,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-27 22:54:36,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:54:39,324 INFO L130 PetriNetUnfolder]: 2154/4100 cut-off events. [2023-01-27 22:54:39,324 INFO L131 PetriNetUnfolder]: For 21473/21473 co-relation queries the response was YES. [2023-01-27 22:54:39,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21944 conditions, 4100 events. 2154/4100 cut-off events. For 21473/21473 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 27157 event pairs, 544 based on Foata normal form. 2/4102 useless extension candidates. Maximal degree in co-relation 21889. Up to 2988 conditions per place. [2023-01-27 22:54:39,345 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 239 selfloop transitions, 48 changer transitions 96/383 dead transitions. [2023-01-27 22:54:39,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 383 transitions, 5147 flow [2023-01-27 22:54:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 22:54:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 22:54:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2665 transitions. [2023-01-27 22:54:39,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3399234693877551 [2023-01-27 22:54:39,347 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2665 transitions. [2023-01-27 22:54:39,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2665 transitions. [2023-01-27 22:54:39,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:54:39,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2665 transitions. [2023-01-27 22:54:39,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 76.14285714285714) internal successors, (2665), 35 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states 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 22:54:39,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 224.0) internal successors, (8064), 36 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states 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 22:54:39,356 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 224.0) internal successors, (8064), 36 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states 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 22:54:39,356 INFO L175 Difference]: Start difference. First operand has 182 places, 250 transitions, 3702 flow. Second operand 35 states and 2665 transitions. [2023-01-27 22:54:39,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 383 transitions, 5147 flow [2023-01-27 22:54:39,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 383 transitions, 4996 flow, removed 7 selfloop flow, removed 28 redundant places. [2023-01-27 22:54:39,443 INFO L231 Difference]: Finished difference. Result has 187 places, 233 transitions, 3436 flow [2023-01-27 22:54:39,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3436, PETRI_PLACES=187, PETRI_TRANSITIONS=233} [2023-01-27 22:54:39,444 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 168 predicate places. [2023-01-27 22:54:39,444 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 233 transitions, 3436 flow [2023-01-27 22:54:39,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 72.52380952380952) internal successors, (3046), 42 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states 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 22:54:39,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:54:39,445 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:54:39,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 22:54:39,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:54:39,650 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 22:54:39,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:54:39,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1412978937, now seen corresponding path program 19 times [2023-01-27 22:54:39,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:54:39,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905696823] [2023-01-27 22:54:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:54:39,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:54:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:54:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:40,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:54:40,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905696823] [2023-01-27 22:54:40,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905696823] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:54:40,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783078902] [2023-01-27 22:54:40,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:54:40,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:54:40,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:54:40,381 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 22:54:40,411 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 22:54:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:54:40,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-27 22:54:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:54:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:41,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:54:41,212 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-27 22:54:41,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-01-27 22:54:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:41,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783078902] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:54:41,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:54:41,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-01-27 22:54:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864800708] [2023-01-27 22:54:41,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:54:41,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-27 22:54:41,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:54:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-27 22:54:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2023-01-27 22:54:41,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-27 22:54:41,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 233 transitions, 3436 flow. Second operand has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:54:41,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:54:41,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-27 22:54:41,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:54:47,568 INFO L130 PetriNetUnfolder]: 5895/10903 cut-off events. [2023-01-27 22:54:47,569 INFO L131 PetriNetUnfolder]: For 64208/64208 co-relation queries the response was YES. [2023-01-27 22:54:47,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60681 conditions, 10903 events. 5895/10903 cut-off events. For 64208/64208 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 82728 event pairs, 260 based on Foata normal form. 65/10968 useless extension candidates. Maximal degree in co-relation 60625. Up to 5329 conditions per place. [2023-01-27 22:54:47,637 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 537 selfloop transitions, 483 changer transitions 126/1146 dead transitions. [2023-01-27 22:54:47,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 1146 transitions, 15607 flow [2023-01-27 22:54:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-01-27 22:54:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-01-27 22:54:47,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 6938 transitions. [2023-01-27 22:54:47,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35196834415584416 [2023-01-27 22:54:47,646 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 6938 transitions. [2023-01-27 22:54:47,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 6938 transitions. [2023-01-27 22:54:47,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:54:47,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 6938 transitions. [2023-01-27 22:54:47,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 78.8409090909091) internal successors, (6938), 88 states have internal predecessors, (6938), 0 states have call successors, (0), 0 states 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 22:54:47,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 224.0) internal successors, (19936), 89 states have internal predecessors, (19936), 0 states have call successors, (0), 0 states 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 22:54:47,666 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 224.0) internal successors, (19936), 89 states have internal predecessors, (19936), 0 states have call successors, (0), 0 states 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 22:54:47,666 INFO L175 Difference]: Start difference. First operand has 187 places, 233 transitions, 3436 flow. Second operand 88 states and 6938 transitions. [2023-01-27 22:54:47,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 1146 transitions, 15607 flow [2023-01-27 22:54:47,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 1146 transitions, 15260 flow, removed 121 selfloop flow, removed 30 redundant places. [2023-01-27 22:54:47,903 INFO L231 Difference]: Finished difference. Result has 265 places, 579 transitions, 10907 flow [2023-01-27 22:54:47,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=3320, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=10907, PETRI_PLACES=265, PETRI_TRANSITIONS=579} [2023-01-27 22:54:47,903 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 246 predicate places. [2023-01-27 22:54:47,904 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 579 transitions, 10907 flow [2023-01-27 22:54:47,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:54:47,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:54:47,905 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:54:47,915 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 22:54:48,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:54:48,110 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 22:54:48,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:54:48,110 INFO L85 PathProgramCache]: Analyzing trace with hash -311782649, now seen corresponding path program 20 times [2023-01-27 22:54:48,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:54:48,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532126098] [2023-01-27 22:54:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:54:48,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:54:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:54:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:48,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:54:48,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532126098] [2023-01-27 22:54:48,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532126098] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:54:48,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629877130] [2023-01-27 22:54:48,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:54:48,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:54:48,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:54:48,772 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:54:48,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 22:54:48,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:54:48,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:54:48,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-27 22:54:48,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:54:49,461 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-01-27 22:54:49,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2023-01-27 22:54:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:49,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:54:49,549 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-27 22:54:49,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-01-27 22:54:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:50,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629877130] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:54:50,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:54:50,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-01-27 22:54:50,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585771391] [2023-01-27 22:54:50,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:54:50,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-27 22:54:50,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:54:50,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-27 22:54:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=2132, Unknown=0, NotChecked=0, Total=2550 [2023-01-27 22:54:50,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-27 22:54:50,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 579 transitions, 10907 flow. Second operand has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:54:50,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:54:50,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-27 22:54:50,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:54:53,167 INFO L130 PetriNetUnfolder]: 5837/10779 cut-off events. [2023-01-27 22:54:53,167 INFO L131 PetriNetUnfolder]: For 125131/125131 co-relation queries the response was YES. [2023-01-27 22:54:53,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65734 conditions, 10779 events. 5837/10779 cut-off events. For 125131/125131 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 81996 event pairs, 2260 based on Foata normal form. 1/10780 useless extension candidates. Maximal degree in co-relation 65650. Up to 10205 conditions per place. [2023-01-27 22:54:53,238 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 550 selfloop transitions, 21 changer transitions 62/633 dead transitions. [2023-01-27 22:54:53,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 633 transitions, 12412 flow [2023-01-27 22:54:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 22:54:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 22:54:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1581 transitions. [2023-01-27 22:54:53,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3360969387755102 [2023-01-27 22:54:53,240 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1581 transitions. [2023-01-27 22:54:53,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1581 transitions. [2023-01-27 22:54:53,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:54:53,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1581 transitions. [2023-01-27 22:54:53,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 75.28571428571429) internal successors, (1581), 21 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states 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 22:54:53,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:54:53,245 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:54:53,245 INFO L175 Difference]: Start difference. First operand has 265 places, 579 transitions, 10907 flow. Second operand 21 states and 1581 transitions. [2023-01-27 22:54:53,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 633 transitions, 12412 flow [2023-01-27 22:54:53,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 633 transitions, 10596 flow, removed 556 selfloop flow, removed 21 redundant places. [2023-01-27 22:54:53,932 INFO L231 Difference]: Finished difference. Result has 255 places, 567 transitions, 8990 flow [2023-01-27 22:54:53,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=9091, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8990, PETRI_PLACES=255, PETRI_TRANSITIONS=567} [2023-01-27 22:54:53,933 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 236 predicate places. [2023-01-27 22:54:53,933 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 567 transitions, 8990 flow [2023-01-27 22:54:53,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:54:53,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:54:53,933 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:54:53,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 22:54:54,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-27 22:54:54,134 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 22:54:54,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:54:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash -757894002, now seen corresponding path program 21 times [2023-01-27 22:54:54,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:54:54,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119763739] [2023-01-27 22:54:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:54:54,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:54:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:54:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:54:55,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:54:55,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119763739] [2023-01-27 22:54:55,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119763739] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:54:55,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083618566] [2023-01-27 22:54:55,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:54:55,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:54:55,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:54:55,213 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:54:55,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 22:54:55,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 22:54:55,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:54:55,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-27 22:54:55,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:54:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-01-27 22:54:55,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:54:55,942 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-27 22:54:55,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-01-27 22:54:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-01-27 22:54:55,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083618566] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:54:55,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:54:55,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 25 [2023-01-27 22:54:55,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763732533] [2023-01-27 22:54:55,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:54:55,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 22:54:55,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:54:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 22:54:55,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2023-01-27 22:54:55,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-27 22:54:55,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 567 transitions, 8990 flow. Second operand has 27 states, 27 states have (on average 72.77777777777777) internal successors, (1965), 27 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 22:54:55,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:54:55,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-27 22:54:55,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:55:03,127 INFO L130 PetriNetUnfolder]: 10858/19930 cut-off events. [2023-01-27 22:55:03,127 INFO L131 PetriNetUnfolder]: For 279275/279275 co-relation queries the response was YES. [2023-01-27 22:55:03,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115752 conditions, 19930 events. 10858/19930 cut-off events. For 279275/279275 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 168035 event pairs, 898 based on Foata normal form. 83/20013 useless extension candidates. Maximal degree in co-relation 115667. Up to 9634 conditions per place. [2023-01-27 22:55:03,265 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 599 selfloop transitions, 906 changer transitions 94/1599 dead transitions. [2023-01-27 22:55:03,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1599 transitions, 26601 flow [2023-01-27 22:55:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-01-27 22:55:03,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-01-27 22:55:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 6629 transitions. [2023-01-27 22:55:03,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523065476190476 [2023-01-27 22:55:03,271 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 6629 transitions. [2023-01-27 22:55:03,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 6629 transitions. [2023-01-27 22:55:03,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:55:03,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 6629 transitions. [2023-01-27 22:55:03,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 78.91666666666667) internal successors, (6629), 84 states have internal predecessors, (6629), 0 states have call successors, (0), 0 states 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 22:55:03,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 224.0) internal successors, (19040), 85 states have internal predecessors, (19040), 0 states have call successors, (0), 0 states 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 22:55:03,290 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 224.0) internal successors, (19040), 85 states have internal predecessors, (19040), 0 states have call successors, (0), 0 states 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 22:55:03,291 INFO L175 Difference]: Start difference. First operand has 255 places, 567 transitions, 8990 flow. Second operand 84 states and 6629 transitions. [2023-01-27 22:55:03,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1599 transitions, 26601 flow [2023-01-27 22:55:04,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1599 transitions, 26389 flow, removed 37 selfloop flow, removed 12 redundant places. [2023-01-27 22:55:04,599 INFO L231 Difference]: Finished difference. Result has 336 places, 1096 transitions, 20729 flow [2023-01-27 22:55:04,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=8859, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=20729, PETRI_PLACES=336, PETRI_TRANSITIONS=1096} [2023-01-27 22:55:04,600 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 317 predicate places. [2023-01-27 22:55:04,600 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 1096 transitions, 20729 flow [2023-01-27 22:55:04,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 72.77777777777777) internal successors, (1965), 27 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 22:55:04,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:55:04,600 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:55:04,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-27 22:55:04,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-27 22:55:04,803 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 22:55:04,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:55:04,803 INFO L85 PathProgramCache]: Analyzing trace with hash 147217710, now seen corresponding path program 22 times [2023-01-27 22:55:04,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:55:04,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355109367] [2023-01-27 22:55:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:55:04,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:55:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:55:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:55:06,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:55:06,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355109367] [2023-01-27 22:55:06,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355109367] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:55:06,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182493651] [2023-01-27 22:55:06,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:55:06,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:55:06,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:55:06,094 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:55:06,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 22:55:06,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:55:06,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:55:06,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 22:55:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:55:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-01-27 22:55:06,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:55:06,501 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-27 22:55:06,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-01-27 22:55:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-01-27 22:55:06,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182493651] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:55:06,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:55:06,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 28 [2023-01-27 22:55:06,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251501419] [2023-01-27 22:55:06,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:55:06,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 22:55:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:55:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 22:55:06,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2023-01-27 22:55:06,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-27 22:55:06,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1096 transitions, 20729 flow. Second operand has 30 states, 30 states have (on average 72.7) internal successors, (2181), 30 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states 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 22:55:06,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:55:06,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-27 22:55:06,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:55:21,123 INFO L130 PetriNetUnfolder]: 17742/32455 cut-off events. [2023-01-27 22:55:21,123 INFO L131 PetriNetUnfolder]: For 1308345/1308345 co-relation queries the response was YES. [2023-01-27 22:55:21,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206427 conditions, 32455 events. 17742/32455 cut-off events. For 1308345/1308345 co-relation queries the response was YES. Maximal size of possible extension queue 1429. Compared 293050 event pairs, 970 based on Foata normal form. 223/32678 useless extension candidates. Maximal degree in co-relation 206306. Up to 15668 conditions per place. [2023-01-27 22:55:21,605 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 823 selfloop transitions, 1708 changer transitions 151/2682 dead transitions. [2023-01-27 22:55:21,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 2682 transitions, 53678 flow [2023-01-27 22:55:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-01-27 22:55:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2023-01-27 22:55:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 10308 transitions. [2023-01-27 22:55:21,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3539835164835165 [2023-01-27 22:55:21,617 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 10308 transitions. [2023-01-27 22:55:21,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 10308 transitions. [2023-01-27 22:55:21,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:55:21,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 10308 transitions. [2023-01-27 22:55:21,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 79.29230769230769) internal successors, (10308), 130 states have internal predecessors, (10308), 0 states have call successors, (0), 0 states 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 22:55:21,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 224.0) internal successors, (29344), 131 states have internal predecessors, (29344), 0 states have call successors, (0), 0 states 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 22:55:21,647 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 224.0) internal successors, (29344), 131 states have internal predecessors, (29344), 0 states have call successors, (0), 0 states 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 22:55:21,648 INFO L175 Difference]: Start difference. First operand has 336 places, 1096 transitions, 20729 flow. Second operand 130 states and 10308 transitions. [2023-01-27 22:55:21,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 2682 transitions, 53678 flow [2023-01-27 22:55:27,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 2682 transitions, 50641 flow, removed 1511 selfloop flow, removed 7 redundant places. [2023-01-27 22:55:27,093 INFO L231 Difference]: Finished difference. Result has 517 places, 1827 transitions, 38177 flow [2023-01-27 22:55:27,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=19032, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1096, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=984, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=38177, PETRI_PLACES=517, PETRI_TRANSITIONS=1827} [2023-01-27 22:55:27,094 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 498 predicate places. [2023-01-27 22:55:27,094 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 1827 transitions, 38177 flow [2023-01-27 22:55:27,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 72.7) internal successors, (2181), 30 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states 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 22:55:27,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:55:27,095 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:55:27,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 22:55:27,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:55:27,301 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:55:27,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:55:27,301 INFO L85 PathProgramCache]: Analyzing trace with hash 235549399, now seen corresponding path program 23 times [2023-01-27 22:55:27,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:55:27,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161036994] [2023-01-27 22:55:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:55:27,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:55:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:55:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-27 22:55:27,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:55:27,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161036994] [2023-01-27 22:55:27,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161036994] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:55:27,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405504750] [2023-01-27 22:55:27,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:55:27,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:55:27,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:55:27,481 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:55:27,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 22:55:27,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 22:55:27,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:55:27,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-27 22:55:27,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:55:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-27 22:55:27,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:55:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-27 22:55:27,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405504750] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:55:27,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:55:27,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 12] total 20 [2023-01-27 22:55:27,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908771812] [2023-01-27 22:55:27,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:55:27,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 22:55:27,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:55:27,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 22:55:27,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2023-01-27 22:55:27,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 224 [2023-01-27 22:55:27,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 1827 transitions, 38177 flow. Second operand has 21 states, 21 states have (on average 97.47619047619048) internal successors, (2047), 21 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states 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 22:55:27,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:55:27,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 224 [2023-01-27 22:55:27,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:55:51,865 INFO L130 PetriNetUnfolder]: 27322/49932 cut-off events. [2023-01-27 22:55:51,865 INFO L131 PetriNetUnfolder]: For 2978054/2978054 co-relation queries the response was YES. [2023-01-27 22:55:53,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336524 conditions, 49932 events. 27322/49932 cut-off events. For 2978054/2978054 co-relation queries the response was YES. Maximal size of possible extension queue 2239. Compared 484530 event pairs, 6502 based on Foata normal form. 12/49944 useless extension candidates. Maximal degree in co-relation 336343. Up to 24086 conditions per place. [2023-01-27 22:55:53,122 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 491 selfloop transitions, 2030 changer transitions 6/2527 dead transitions. [2023-01-27 22:55:53,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 2527 transitions, 59385 flow [2023-01-27 22:55:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 22:55:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 22:55:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 833 transitions. [2023-01-27 22:55:53,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46484375 [2023-01-27 22:55:53,123 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 833 transitions. [2023-01-27 22:55:53,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 833 transitions. [2023-01-27 22:55:53,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:55:53,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 833 transitions. [2023-01-27 22:55:53,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 104.125) internal successors, (833), 8 states have internal predecessors, (833), 0 states have call successors, (0), 0 states 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 22:55:53,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 224.0) internal successors, (2016), 9 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:55:53,125 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 224.0) internal successors, (2016), 9 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:55:53,125 INFO L175 Difference]: Start difference. First operand has 517 places, 1827 transitions, 38177 flow. Second operand 8 states and 833 transitions. [2023-01-27 22:55:53,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 2527 transitions, 59385 flow [2023-01-27 22:56:11,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 2527 transitions, 55087 flow, removed 2047 selfloop flow, removed 17 redundant places. [2023-01-27 22:56:11,489 INFO L231 Difference]: Finished difference. Result has 508 places, 2476 transitions, 53643 flow [2023-01-27 22:56:11,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34725, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=53643, PETRI_PLACES=508, PETRI_TRANSITIONS=2476} [2023-01-27 22:56:11,490 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 489 predicate places. [2023-01-27 22:56:11,491 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 2476 transitions, 53643 flow [2023-01-27 22:56:11,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.47619047619048) internal successors, (2047), 21 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states 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 22:56:11,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:56:11,491 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:56:11,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 22:56:11,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:56:11,696 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:56:11,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:56:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash -577695301, now seen corresponding path program 24 times [2023-01-27 22:56:11,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:56:11,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766489214] [2023-01-27 22:56:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:56:11,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:56:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:56:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:56:12,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:56:12,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766489214] [2023-01-27 22:56:12,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766489214] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:56:12,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989687152] [2023-01-27 22:56:12,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:56:12,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:56:12,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:56:12,679 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:56:12,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 22:56:13,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 22:56:13,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:56:13,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-27 22:56:13,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:56:13,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:56:13,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-27 22:56:14,171 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 22:56:14,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-27 22:56:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:56:14,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:56:14,372 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1040 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1040) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))) is different from false [2023-01-27 22:56:14,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:56:14,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-27 22:56:14,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 22:56:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:56:15,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989687152] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:56:15,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:56:15,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2023-01-27 22:56:15,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537687503] [2023-01-27 22:56:15,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:56:15,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-01-27 22:56:15,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:56:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-01-27 22:56:15,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=3069, Unknown=2, NotChecked=114, Total=3540 [2023-01-27 22:56:15,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-27 22:56:15,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 2476 transitions, 53643 flow. Second operand has 60 states, 60 states have (on average 68.35) internal successors, (4101), 60 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states 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 22:56:15,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:56:15,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-27 22:56:15,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:57:58,871 INFO L130 PetriNetUnfolder]: 58212/106346 cut-off events. [2023-01-27 22:57:58,872 INFO L131 PetriNetUnfolder]: For 7184204/7184204 co-relation queries the response was YES. [2023-01-27 22:58:01,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715858 conditions, 106346 events. 58212/106346 cut-off events. For 7184204/7184204 co-relation queries the response was YES. Maximal size of possible extension queue 4828. Compared 1124071 event pairs, 9045 based on Foata normal form. 78/106424 useless extension candidates. Maximal degree in co-relation 715679. Up to 51185 conditions per place. [2023-01-27 22:58:01,924 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 2999 selfloop transitions, 3591 changer transitions 308/6898 dead transitions. [2023-01-27 22:58:01,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 6898 transitions, 147500 flow [2023-01-27 22:58:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2023-01-27 22:58:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2023-01-27 22:58:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 18090 transitions. [2023-01-27 22:58:01,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3364955357142857 [2023-01-27 22:58:01,934 INFO L72 ComplementDD]: Start complementDD. Operand 240 states and 18090 transitions. [2023-01-27 22:58:01,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 240 states and 18090 transitions. [2023-01-27 22:58:01,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:58:01,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 240 states and 18090 transitions. [2023-01-27 22:58:01,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 241 states, 240 states have (on average 75.375) internal successors, (18090), 240 states have internal predecessors, (18090), 0 states have call successors, (0), 0 states 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 22:58:01,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 241 states, 241 states have (on average 224.0) internal successors, (53984), 241 states have internal predecessors, (53984), 0 states have call successors, (0), 0 states 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 22:58:01,990 INFO L81 ComplementDD]: Finished complementDD. Result has 241 states, 241 states have (on average 224.0) internal successors, (53984), 241 states have internal predecessors, (53984), 0 states have call successors, (0), 0 states 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 22:58:01,990 INFO L175 Difference]: Start difference. First operand has 508 places, 2476 transitions, 53643 flow. Second operand 240 states and 18090 transitions. [2023-01-27 22:58:01,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 747 places, 6898 transitions, 147500 flow [2023-01-27 22:59:53,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 6898 transitions, 145810 flow, removed 523 selfloop flow, removed 1 redundant places. [2023-01-27 22:59:53,547 INFO L231 Difference]: Finished difference. Result has 834 places, 5438 transitions, 118696 flow [2023-01-27 22:59:53,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=52368, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=922, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=240, PETRI_FLOW=118696, PETRI_PLACES=834, PETRI_TRANSITIONS=5438} [2023-01-27 22:59:53,550 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 815 predicate places. [2023-01-27 22:59:53,550 INFO L495 AbstractCegarLoop]: Abstraction has has 834 places, 5438 transitions, 118696 flow [2023-01-27 22:59:53,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 68.35) internal successors, (4101), 60 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states 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 22:59:53,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:59:53,551 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:59:53,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 22:59:53,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 22:59:53,758 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:59:53,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:59:53,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1188056710, now seen corresponding path program 25 times [2023-01-27 22:59:53,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:59:53,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242033946] [2023-01-27 22:59:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:59:53,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:59:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:59:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:59:54,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:59:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242033946] [2023-01-27 22:59:54,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242033946] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:59:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489109701] [2023-01-27 22:59:54,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:59:54,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:59:54,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:59:54,641 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:59:54,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 22:59:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:59:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-27 22:59:54,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:59:55,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 22:59:55,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-27 22:59:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:59:55,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:59:55,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 22:59:55,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-27 22:59:55,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 22:59:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:59:56,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489109701] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:59:56,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:59:56,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2023-01-27 22:59:56,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439766046] [2023-01-27 22:59:56,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:59:56,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-01-27 22:59:56,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:59:56,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-01-27 22:59:56,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=3479, Unknown=8, NotChecked=0, Total=3906 [2023-01-27 22:59:56,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-27 22:59:56,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 834 places, 5438 transitions, 118696 flow. Second operand has 63 states, 63 states have (on average 68.33333333333333) internal successors, (4305), 63 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states 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 22:59:56,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:59:56,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-27 22:59:56,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:00:00,641 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] Received shutdown request... [2023-01-27 23:03:50,113 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 23:03:50,113 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 23:03:51,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 23:03:51,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown