/usr/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 20:13:05,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 20:13:05,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 20:13:05,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 20:13:05,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 20:13:05,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 20:13:05,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 20:13:05,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 20:13:05,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 20:13:05,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 20:13:05,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 20:13:05,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 20:13:05,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 20:13:05,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 20:13:05,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 20:13:05,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 20:13:05,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 20:13:05,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 20:13:05,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 20:13:05,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 20:13:05,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 20:13:05,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 20:13:05,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 20:13:05,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 20:13:05,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 20:13:05,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 20:13:05,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 20:13:05,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 20:13:05,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 20:13:05,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 20:13:05,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 20:13:05,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 20:13:05,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 20:13:05,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 20:13:05,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 20:13:05,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 20:13:05,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 20:13:05,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 20:13:05,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 20:13:05,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 20:13:05,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 20:13:05,112 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-SemanticLbe.epf [2022-12-05 20:13:05,157 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 20:13:05,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 20:13:05,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 20:13:05,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 20:13:05,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 20:13:05,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 20:13:05,159 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 20:13:05,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 20:13:05,159 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 20:13:05,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 20:13:05,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 20:13:05,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 20:13:05,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 20:13:05,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 20:13:05,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 20:13:05,161 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 20:13:05,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 20:13:05,161 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 20:13:05,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 20:13:05,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 20:13:05,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 20:13:05,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 20:13:05,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 20:13:05,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:13:05,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 20:13:05,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 20:13:05,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 20:13:05,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 20:13:05,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 20:13:05,162 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 20:13:05,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 20:13:05,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 20:13:05,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 20:13:05,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 20:13:05,426 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 20:13:05,427 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 20:13:05,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2022-12-05 20:13:06,384 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 20:13:06,596 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 20:13:06,596 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2022-12-05 20:13:06,629 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd6fe451d/7b1d995684e64e7d8ada7d2ffe127e18/FLAGd7f32825f [2022-12-05 20:13:06,639 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd6fe451d/7b1d995684e64e7d8ada7d2ffe127e18 [2022-12-05 20:13:06,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 20:13:06,643 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 20:13:06,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 20:13:06,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 20:13:06,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 20:13:06,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:13:06" (1/1) ... [2022-12-05 20:13:06,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40cfd02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:06, skipping insertion in model container [2022-12-05 20:13:06,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:13:06" (1/1) ... [2022-12-05 20:13:06,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 20:13:06,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 20:13:07,044 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2022-12-05 20:13:07,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:13:07,079 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 20:13:07,110 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2022-12-05 20:13:07,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:13:07,185 INFO L208 MainTranslator]: Completed translation [2022-12-05 20:13:07,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07 WrapperNode [2022-12-05 20:13:07,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 20:13:07,187 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 20:13:07,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 20:13:07,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 20:13:07,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (1/1) ... [2022-12-05 20:13:07,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (1/1) ... [2022-12-05 20:13:07,237 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-12-05 20:13:07,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 20:13:07,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 20:13:07,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 20:13:07,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 20:13:07,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (1/1) ... [2022-12-05 20:13:07,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (1/1) ... [2022-12-05 20:13:07,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (1/1) ... [2022-12-05 20:13:07,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (1/1) ... [2022-12-05 20:13:07,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (1/1) ... [2022-12-05 20:13:07,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (1/1) ... [2022-12-05 20:13:07,269 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (1/1) ... [2022-12-05 20:13:07,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (1/1) ... [2022-12-05 20:13:07,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 20:13:07,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 20:13:07,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 20:13:07,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 20:13:07,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (1/1) ... [2022-12-05 20:13:07,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:13:07,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:13:07,317 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) [2022-12-05 20:13:07,318 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 [2022-12-05 20:13:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-05 20:13:07,345 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-05 20:13:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-05 20:13:07,345 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-05 20:13:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 20:13:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 20:13:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 20:13:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 20:13:07,345 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-05 20:13:07,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 20:13:07,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 20:13:07,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 20:13:07,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 20:13:07,347 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 20:13:07,454 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 20:13:07,456 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 20:13:07,706 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 20:13:07,712 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 20:13:07,712 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-05 20:13:07,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:13:07 BoogieIcfgContainer [2022-12-05 20:13:07,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 20:13:07,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 20:13:07,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 20:13:07,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 20:13:07,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 08:13:06" (1/3) ... [2022-12-05 20:13:07,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307661c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:13:07, skipping insertion in model container [2022-12-05 20:13:07,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:13:07" (2/3) ... [2022-12-05 20:13:07,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307661c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:13:07, skipping insertion in model container [2022-12-05 20:13:07,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:13:07" (3/3) ... [2022-12-05 20:13:07,724 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2022-12-05 20:13:07,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 20:13:07,737 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-05 20:13:07,737 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 20:13:07,844 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 20:13:07,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 157 transitions, 330 flow [2022-12-05 20:13:07,915 INFO L130 PetriNetUnfolder]: 10/155 cut-off events. [2022-12-05 20:13:07,919 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 20:13:07,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 155 events. 10/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 375 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 117. Up to 3 conditions per place. [2022-12-05 20:13:07,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 157 transitions, 330 flow [2022-12-05 20:13:07,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 146 transitions, 301 flow [2022-12-05 20:13:07,928 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 20:13:07,939 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 146 transitions, 301 flow [2022-12-05 20:13:07,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 146 transitions, 301 flow [2022-12-05 20:13:07,964 INFO L130 PetriNetUnfolder]: 10/146 cut-off events. [2022-12-05 20:13:07,965 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-05 20:13:07,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 146 events. 10/146 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 308 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 117. Up to 3 conditions per place. [2022-12-05 20:13:07,969 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 146 transitions, 301 flow [2022-12-05 20:13:07,969 INFO L188 LiptonReduction]: Number of co-enabled transitions 7212 [2022-12-05 20:13:11,672 INFO L203 LiptonReduction]: Total number of compositions: 119 [2022-12-05 20:13:11,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 20:13:11,687 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;@19f23a2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 20:13:11,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-05 20:13:11,690 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2022-12-05 20:13:11,690 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-05 20:13:11,691 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:13:11,691 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-05 20:13:11,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 20:13:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:13:11,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1682314067, now seen corresponding path program 1 times [2022-12-05 20:13:11,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:13:11,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163798404] [2022-12-05 20:13:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:11,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:13:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:13:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:13:11,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:13:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163798404] [2022-12-05 20:13:11,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163798404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:13:11,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:13:11,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 20:13:11,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713785129] [2022-12-05 20:13:11,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:13:11,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 20:13:11,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:13:11,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 20:13:11,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 20:13:11,938 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2022-12-05 20:13:11,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:11,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:13:11,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2022-12-05 20:13:11,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:13:12,135 INFO L130 PetriNetUnfolder]: 1116/1910 cut-off events. [2022-12-05 20:13:12,135 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2022-12-05 20:13:12,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3780 conditions, 1910 events. 1116/1910 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9673 event pairs, 336 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 3543. Up to 1047 conditions per place. [2022-12-05 20:13:12,149 INFO L137 encePairwiseOnDemand]: 35/42 looper letters, 62 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2022-12-05 20:13:12,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 70 transitions, 287 flow [2022-12-05 20:13:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 20:13:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 20:13:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2022-12-05 20:13:12,158 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2022-12-05 20:13:12,159 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 93 flow. Second operand 3 states and 83 transitions. [2022-12-05 20:13:12,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 70 transitions, 287 flow [2022-12-05 20:13:12,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 70 transitions, 279 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-05 20:13:12,164 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 114 flow [2022-12-05 20:13:12,165 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2022-12-05 20:13:12,168 INFO L294 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2022-12-05 20:13:12,168 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 114 flow [2022-12-05 20:13:12,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:12,168 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:13:12,168 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:13:12,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 20:13:12,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 20:13:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:13:12,169 INFO L85 PathProgramCache]: Analyzing trace with hash 405438763, now seen corresponding path program 1 times [2022-12-05 20:13:12,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:13:12,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156206674] [2022-12-05 20:13:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:12,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:13:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:13:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:13:12,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:13:12,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156206674] [2022-12-05 20:13:12,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156206674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:13:12,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:13:12,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 20:13:12,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980061874] [2022-12-05 20:13:12,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:13:12,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 20:13:12,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:13:12,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 20:13:12,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 20:13:12,253 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2022-12-05 20:13:12,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:12,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:13:12,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2022-12-05 20:13:12,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:13:12,425 INFO L130 PetriNetUnfolder]: 989/1750 cut-off events. [2022-12-05 20:13:12,425 INFO L131 PetriNetUnfolder]: For 241/241 co-relation queries the response was YES. [2022-12-05 20:13:12,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3621 conditions, 1750 events. 989/1750 cut-off events. For 241/241 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8945 event pairs, 447 based on Foata normal form. 44/1379 useless extension candidates. Maximal degree in co-relation 3139. Up to 1283 conditions per place. [2022-12-05 20:13:12,433 INFO L137 encePairwiseOnDemand]: 37/42 looper letters, 47 selfloop transitions, 2 changer transitions 5/62 dead transitions. [2022-12-05 20:13:12,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 267 flow [2022-12-05 20:13:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 20:13:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 20:13:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2022-12-05 20:13:12,435 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2022-12-05 20:13:12,435 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 114 flow. Second operand 3 states and 76 transitions. [2022-12-05 20:13:12,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 267 flow [2022-12-05 20:13:12,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 20:13:12,437 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 124 flow [2022-12-05 20:13:12,437 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2022-12-05 20:13:12,438 INFO L294 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2022-12-05 20:13:12,438 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 124 flow [2022-12-05 20:13:12,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:12,438 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:13:12,438 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:13:12,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 20:13:12,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 20:13:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:13:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash -652865259, now seen corresponding path program 1 times [2022-12-05 20:13:12,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:13:12,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607987028] [2022-12-05 20:13:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:12,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:13:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:13:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:13:12,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:13:12,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607987028] [2022-12-05 20:13:12,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607987028] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:13:12,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:13:12,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 20:13:12,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215604107] [2022-12-05 20:13:12,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:13:12,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 20:13:12,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:13:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 20:13:12,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 20:13:12,495 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2022-12-05 20:13:12,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:12,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:13:12,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2022-12-05 20:13:12,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:13:12,730 INFO L130 PetriNetUnfolder]: 1576/2742 cut-off events. [2022-12-05 20:13:12,731 INFO L131 PetriNetUnfolder]: For 285/287 co-relation queries the response was YES. [2022-12-05 20:13:12,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5885 conditions, 2742 events. 1576/2742 cut-off events. For 285/287 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15660 event pairs, 802 based on Foata normal form. 2/2069 useless extension candidates. Maximal degree in co-relation 5328. Up to 1672 conditions per place. [2022-12-05 20:13:12,742 INFO L137 encePairwiseOnDemand]: 39/42 looper letters, 60 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2022-12-05 20:13:12,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 319 flow [2022-12-05 20:13:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 20:13:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 20:13:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2022-12-05 20:13:12,745 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2022-12-05 20:13:12,745 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 124 flow. Second operand 3 states and 78 transitions. [2022-12-05 20:13:12,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 319 flow [2022-12-05 20:13:12,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 20:13:12,747 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 137 flow [2022-12-05 20:13:12,748 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2022-12-05 20:13:12,748 INFO L294 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2022-12-05 20:13:12,749 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 137 flow [2022-12-05 20:13:12,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:12,749 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:13:12,749 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:13:12,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 20:13:12,749 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 20:13:12,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:13:12,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1354961207, now seen corresponding path program 1 times [2022-12-05 20:13:12,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:13:12,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871824537] [2022-12-05 20:13:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:12,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:13:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:13:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:13:12,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:13:12,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871824537] [2022-12-05 20:13:12,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871824537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:13:12,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745337682] [2022-12-05 20:13:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:12,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:13:12,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:13:12,865 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) [2022-12-05 20:13:12,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 20:13:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:13:12,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-05 20:13:12,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:13:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:13:13,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:13:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:13:13,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745337682] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:13:13,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:13:13,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-12-05 20:13:13,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323427595] [2022-12-05 20:13:13,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:13:13,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 20:13:13,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:13:13,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 20:13:13,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-05 20:13:13,074 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2022-12-05 20:13:13,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 137 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:13,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:13:13,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2022-12-05 20:13:13,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:13:13,668 INFO L130 PetriNetUnfolder]: 2809/4837 cut-off events. [2022-12-05 20:13:13,668 INFO L131 PetriNetUnfolder]: For 1383/1383 co-relation queries the response was YES. [2022-12-05 20:13:13,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11062 conditions, 4837 events. 2809/4837 cut-off events. For 1383/1383 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 27521 event pairs, 691 based on Foata normal form. 56/3953 useless extension candidates. Maximal degree in co-relation 10240. Up to 1474 conditions per place. [2022-12-05 20:13:13,690 INFO L137 encePairwiseOnDemand]: 36/42 looper letters, 187 selfloop transitions, 22 changer transitions 0/213 dead transitions. [2022-12-05 20:13:13,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 213 transitions, 1027 flow [2022-12-05 20:13:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 20:13:13,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 20:13:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2022-12-05 20:13:13,692 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2022-12-05 20:13:13,693 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 137 flow. Second operand 10 states and 248 transitions. [2022-12-05 20:13:13,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 213 transitions, 1027 flow [2022-12-05 20:13:13,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 213 transitions, 1015 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 20:13:13,699 INFO L231 Difference]: Finished difference. Result has 58 places, 63 transitions, 306 flow [2022-12-05 20:13:13,699 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=306, PETRI_PLACES=58, PETRI_TRANSITIONS=63} [2022-12-05 20:13:13,699 INFO L294 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2022-12-05 20:13:13,699 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 63 transitions, 306 flow [2022-12-05 20:13:13,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:13,700 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:13:13,700 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:13:13,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 20:13:13,905 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 [2022-12-05 20:13:13,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 20:13:13,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:13:13,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1119306924, now seen corresponding path program 1 times [2022-12-05 20:13:13,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:13:13,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603469049] [2022-12-05 20:13:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:13,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:13:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:13:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:13:14,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:13:14,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603469049] [2022-12-05 20:13:14,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603469049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:13:14,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:13:14,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 20:13:14,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248539753] [2022-12-05 20:13:14,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:13:14,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 20:13:14,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:13:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 20:13:14,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 20:13:14,023 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2022-12-05 20:13:14,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 63 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:14,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:13:14,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2022-12-05 20:13:14,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:13:14,158 INFO L130 PetriNetUnfolder]: 832/1695 cut-off events. [2022-12-05 20:13:14,158 INFO L131 PetriNetUnfolder]: For 681/681 co-relation queries the response was YES. [2022-12-05 20:13:14,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3890 conditions, 1695 events. 832/1695 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8828 event pairs, 126 based on Foata normal form. 88/1575 useless extension candidates. Maximal degree in co-relation 2590. Up to 1152 conditions per place. [2022-12-05 20:13:14,165 INFO L137 encePairwiseOnDemand]: 35/42 looper letters, 39 selfloop transitions, 7 changer transitions 4/62 dead transitions. [2022-12-05 20:13:14,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 347 flow [2022-12-05 20:13:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 20:13:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 20:13:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2022-12-05 20:13:14,167 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2022-12-05 20:13:14,167 INFO L175 Difference]: Start difference. First operand has 58 places, 63 transitions, 306 flow. Second operand 3 states and 67 transitions. [2022-12-05 20:13:14,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 347 flow [2022-12-05 20:13:14,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 335 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-05 20:13:14,171 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 218 flow [2022-12-05 20:13:14,171 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2022-12-05 20:13:14,173 INFO L294 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2022-12-05 20:13:14,173 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 218 flow [2022-12-05 20:13:14,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:14,174 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:13:14,174 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:13:14,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 20:13:14,174 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 20:13:14,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:13:14,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1742164676, now seen corresponding path program 1 times [2022-12-05 20:13:14,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:13:14,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107617924] [2022-12-05 20:13:14,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:14,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:13:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:13:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:13:14,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:13:14,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107617924] [2022-12-05 20:13:14,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107617924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:13:14,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:13:14,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 20:13:14,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430781180] [2022-12-05 20:13:14,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:13:14,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 20:13:14,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:13:14,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 20:13:14,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 20:13:14,250 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2022-12-05 20:13:14,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:14,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:13:14,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2022-12-05 20:13:14,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:13:14,443 INFO L130 PetriNetUnfolder]: 876/1691 cut-off events. [2022-12-05 20:13:14,443 INFO L131 PetriNetUnfolder]: For 598/598 co-relation queries the response was YES. [2022-12-05 20:13:14,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4232 conditions, 1691 events. 876/1691 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7769 event pairs, 264 based on Foata normal form. 12/1653 useless extension candidates. Maximal degree in co-relation 3420. Up to 665 conditions per place. [2022-12-05 20:13:14,449 INFO L137 encePairwiseOnDemand]: 36/42 looper letters, 82 selfloop transitions, 11 changer transitions 0/97 dead transitions. [2022-12-05 20:13:14,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 560 flow [2022-12-05 20:13:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 20:13:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 20:13:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2022-12-05 20:13:14,451 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2022-12-05 20:13:14,451 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 218 flow. Second operand 5 states and 104 transitions. [2022-12-05 20:13:14,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 560 flow [2022-12-05 20:13:14,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 97 transitions, 541 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 20:13:14,455 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 268 flow [2022-12-05 20:13:14,456 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2022-12-05 20:13:14,458 INFO L294 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2022-12-05 20:13:14,458 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 268 flow [2022-12-05 20:13:14,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:14,458 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:13:14,458 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:13:14,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 20:13:14,458 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 20:13:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:13:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1749158708, now seen corresponding path program 1 times [2022-12-05 20:13:14,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:13:14,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495883847] [2022-12-05 20:13:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:14,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:13:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:13:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:13:14,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:13:14,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495883847] [2022-12-05 20:13:14,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495883847] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:13:14,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:13:14,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-05 20:13:14,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057775209] [2022-12-05 20:13:14,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:13:14,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 20:13:14,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:13:14,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 20:13:14,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-05 20:13:14,869 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2022-12-05 20:13:14,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 268 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:14,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:13:14,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2022-12-05 20:13:14,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:13:15,448 INFO L130 PetriNetUnfolder]: 1381/2754 cut-off events. [2022-12-05 20:13:15,449 INFO L131 PetriNetUnfolder]: For 2058/2058 co-relation queries the response was YES. [2022-12-05 20:13:15,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6734 conditions, 2754 events. 1381/2754 cut-off events. For 2058/2058 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 15346 event pairs, 478 based on Foata normal form. 0/2568 useless extension candidates. Maximal degree in co-relation 3739. Up to 1278 conditions per place. [2022-12-05 20:13:15,465 INFO L137 encePairwiseOnDemand]: 33/42 looper letters, 122 selfloop transitions, 14 changer transitions 7/155 dead transitions. [2022-12-05 20:13:15,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 155 transitions, 925 flow [2022-12-05 20:13:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 20:13:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 20:13:15,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2022-12-05 20:13:15,467 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2022-12-05 20:13:15,467 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 268 flow. Second operand 9 states and 183 transitions. [2022-12-05 20:13:15,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 155 transitions, 925 flow [2022-12-05 20:13:15,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 155 transitions, 907 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-05 20:13:15,472 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 379 flow [2022-12-05 20:13:15,472 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=379, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2022-12-05 20:13:15,472 INFO L294 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2022-12-05 20:13:15,472 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 379 flow [2022-12-05 20:13:15,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:15,473 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:13:15,474 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:13:15,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-05 20:13:15,478 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 20:13:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:13:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1145932444, now seen corresponding path program 2 times [2022-12-05 20:13:15,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:13:15,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759362234] [2022-12-05 20:13:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:15,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:13:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:13:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:13:15,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:13:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759362234] [2022-12-05 20:13:15,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759362234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:13:15,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:13:15,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-05 20:13:15,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068013668] [2022-12-05 20:13:15,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:13:15,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 20:13:15,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:13:15,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 20:13:15,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-05 20:13:15,936 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2022-12-05 20:13:15,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 379 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:15,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:13:15,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2022-12-05 20:13:15,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:13:16,578 INFO L130 PetriNetUnfolder]: 1862/3696 cut-off events. [2022-12-05 20:13:16,579 INFO L131 PetriNetUnfolder]: For 3313/3313 co-relation queries the response was YES. [2022-12-05 20:13:16,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9597 conditions, 3696 events. 1862/3696 cut-off events. For 3313/3313 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 21516 event pairs, 540 based on Foata normal form. 12/3555 useless extension candidates. Maximal degree in co-relation 6688. Up to 1183 conditions per place. [2022-12-05 20:13:16,598 INFO L137 encePairwiseOnDemand]: 34/42 looper letters, 124 selfloop transitions, 22 changer transitions 4/162 dead transitions. [2022-12-05 20:13:16,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 162 transitions, 1068 flow [2022-12-05 20:13:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 20:13:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 20:13:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2022-12-05 20:13:16,600 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2022-12-05 20:13:16,600 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 379 flow. Second operand 9 states and 180 transitions. [2022-12-05 20:13:16,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 162 transitions, 1068 flow [2022-12-05 20:13:16,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 162 transitions, 1066 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-05 20:13:16,606 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 523 flow [2022-12-05 20:13:16,607 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=523, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2022-12-05 20:13:16,608 INFO L294 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2022-12-05 20:13:16,609 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 523 flow [2022-12-05 20:13:16,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:16,609 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:13:16,610 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:13:16,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 20:13:16,610 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 20:13:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:13:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash 806446688, now seen corresponding path program 1 times [2022-12-05 20:13:16,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:13:16,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741645437] [2022-12-05 20:13:16,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:16,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:13:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:13:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:13:16,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:13:16,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741645437] [2022-12-05 20:13:16,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741645437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:13:16,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268209034] [2022-12-05 20:13:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:16,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:13:16,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:13:16,694 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) [2022-12-05 20:13:16,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 20:13:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:13:16,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 20:13:16,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:13:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 20:13:16,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 20:13:16,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268209034] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:13:16,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 20:13:16,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-05 20:13:16,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357793147] [2022-12-05 20:13:16,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:13:16,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 20:13:16,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:13:16,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 20:13:16,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-05 20:13:16,815 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2022-12-05 20:13:16,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 523 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:16,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:13:16,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2022-12-05 20:13:16,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:13:17,183 INFO L130 PetriNetUnfolder]: 2054/3903 cut-off events. [2022-12-05 20:13:17,183 INFO L131 PetriNetUnfolder]: For 4482/4482 co-relation queries the response was YES. [2022-12-05 20:13:17,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10799 conditions, 3903 events. 2054/3903 cut-off events. For 4482/4482 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 20588 event pairs, 739 based on Foata normal form. 24/3787 useless extension candidates. Maximal degree in co-relation 8132. Up to 1389 conditions per place. [2022-12-05 20:13:17,202 INFO L137 encePairwiseOnDemand]: 34/42 looper letters, 123 selfloop transitions, 19 changer transitions 0/145 dead transitions. [2022-12-05 20:13:17,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 145 transitions, 1128 flow [2022-12-05 20:13:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 20:13:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 20:13:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2022-12-05 20:13:17,203 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2022-12-05 20:13:17,203 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 523 flow. Second operand 7 states and 123 transitions. [2022-12-05 20:13:17,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 145 transitions, 1128 flow [2022-12-05 20:13:17,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 145 transitions, 1084 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-12-05 20:13:17,211 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 674 flow [2022-12-05 20:13:17,211 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=674, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2022-12-05 20:13:17,212 INFO L294 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2022-12-05 20:13:17,212 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 674 flow [2022-12-05 20:13:17,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:13:17,212 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:13:17,212 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:13:17,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 20:13:17,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-05 20:13:17,417 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-05 20:13:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:13:17,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1264121439, now seen corresponding path program 1 times [2022-12-05 20:13:17,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:13:17,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754609722] [2022-12-05 20:13:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:13:17,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:13:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 20:13:17,439 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-05 20:13:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-05 20:13:17,482 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-05 20:13:17,482 INFO L373 BasicCegarLoop]: Counterexample is feasible [2022-12-05 20:13:17,483 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-12-05 20:13:17,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-12-05 20:13:17,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-12-05 20:13:17,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-05 20:13:17,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-05 20:13:17,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-05 20:13:17,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-05 20:13:17,485 INFO L458 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:13:17,490 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 20:13:17,490 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 20:13:17,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 08:13:17 BasicIcfg [2022-12-05 20:13:17,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 20:13:17,548 INFO L158 Benchmark]: Toolchain (without parser) took 10905.22ms. Allocated memory was 179.3MB in the beginning and 361.8MB in the end (delta: 182.5MB). Free memory was 154.3MB in the beginning and 153.9MB in the end (delta: 416.5kB). Peak memory consumption was 183.6MB. Max. memory is 8.0GB. [2022-12-05 20:13:17,548 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 179.3MB. Free memory is still 157.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 20:13:17,548 INFO L158 Benchmark]: CACSL2BoogieTranslator took 541.96ms. Allocated memory is still 179.3MB. Free memory was 154.0MB in the beginning and 125.0MB in the end (delta: 29.1MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2022-12-05 20:13:17,548 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.96ms. Allocated memory is still 179.3MB. Free memory was 125.0MB in the beginning and 122.2MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-12-05 20:13:17,549 INFO L158 Benchmark]: Boogie Preprocessor took 34.19ms. Allocated memory is still 179.3MB. Free memory was 122.2MB in the beginning and 120.5MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 20:13:17,550 INFO L158 Benchmark]: RCFGBuilder took 441.57ms. Allocated memory is still 179.3MB. Free memory was 120.5MB in the beginning and 103.3MB in the end (delta: 17.2MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2022-12-05 20:13:17,550 INFO L158 Benchmark]: TraceAbstraction took 9831.73ms. Allocated memory was 179.3MB in the beginning and 361.8MB in the end (delta: 182.5MB). Free memory was 102.7MB in the beginning and 153.9MB in the end (delta: -51.3MB). Peak memory consumption was 132.2MB. Max. memory is 8.0GB. [2022-12-05 20:13:17,551 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 179.3MB. Free memory is still 157.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 541.96ms. Allocated memory is still 179.3MB. Free memory was 154.0MB in the beginning and 125.0MB in the end (delta: 29.1MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 49.96ms. Allocated memory is still 179.3MB. Free memory was 125.0MB in the beginning and 122.2MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.19ms. Allocated memory is still 179.3MB. Free memory was 122.2MB in the beginning and 120.5MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 441.57ms. Allocated memory is still 179.3MB. Free memory was 120.5MB in the beginning and 103.3MB in the end (delta: 17.2MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 9831.73ms. Allocated memory was 179.3MB in the beginning and 361.8MB in the end (delta: 182.5MB). Free memory was 102.7MB in the beginning and 153.9MB in the end (delta: -51.3MB). Peak memory consumption was 132.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 143 PlacesBefore, 44 PlacesAfterwards, 146 TransitionsBefore, 42 TransitionsAfterwards, 7212 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 5 ConcurrentSequentialCompositions, 26 TrivialYvCompositions, 83 ConcurrentYvCompositions, 5 ChoiceCompositions, 119 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 5273, independent: 5194, independent conditional: 5194, independent unconditional: 0, dependent: 79, dependent conditional: 79, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 5273, independent: 5194, independent conditional: 0, independent unconditional: 5194, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 5273, independent: 5194, independent conditional: 0, independent unconditional: 5194, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 5273, independent: 5194, independent conditional: 0, independent unconditional: 5194, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 4480, independent: 4432, independent conditional: 0, independent unconditional: 4432, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 4480, independent: 4414, independent conditional: 0, independent unconditional: 4414, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 66, independent: 18, independent conditional: 0, independent unconditional: 18, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 94, independent: 21, independent conditional: 0, independent unconditional: 21, dependent: 74, dependent conditional: 0, dependent unconditional: 74, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5273, independent: 762, independent conditional: 0, independent unconditional: 762, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 4480, unknown conditional: 0, unknown unconditional: 4480] , Statistics on independence cache: Total cache size (in pairs): 7918, Positive cache size: 7870, Positive conditional cache size: 0, Positive unconditional cache size: 7870, Negative cache size: 48, Negative conditional cache size: 0, Negative unconditional cache size: 48, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(800)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1, top=0] [L991] COND TRUE 1 i<(800) [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; VAL [\old(x)=6, \result=0, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=1, x=6] [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=6, top=1] [L991] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=6, top=1] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=1, \result=0, arr={3:0}, flag=1, m={4:0}, top=1] [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); VAL [\result=-2, arr={3:0}, flag=1, m={4:0}, stack={3:0}, stack={3:0}, top=0] [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 248 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.6s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 590 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 590 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2024 IncrementalHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 7 mSDtfsCounter, 2024 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=674occurred in iteration=9, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 199 NumberOfCodeBlocks, 199 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 177 ConstructedInterpolants, 0 QuantifiedInterpolants, 1506 SizeOfPredicates, 4 NumberOfNonLiveVariables, 438 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 7/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-05 20:13:17,565 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 Received shutdown request...