/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 08:12:03,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 08:12:03,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 08:12:03,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 08:12:03,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 08:12:03,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 08:12:03,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 08:12:03,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 08:12:03,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 08:12:03,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 08:12:03,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 08:12:03,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 08:12:03,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 08:12:03,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 08:12:03,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 08:12:03,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 08:12:03,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 08:12:03,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 08:12:03,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 08:12:03,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 08:12:03,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 08:12:03,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 08:12:03,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 08:12:03,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 08:12:03,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 08:12:03,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 08:12:03,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 08:12:03,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 08:12:03,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 08:12:03,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 08:12:03,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 08:12:03,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 08:12:03,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 08:12:03,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 08:12:03,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 08:12:03,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 08:12:03,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 08:12:03,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 08:12:03,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 08:12:03,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 08:12:03,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 08:12:03,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 08:12:03,108 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 08:12:03,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 08:12:03,109 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 08:12:03,109 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 08:12:03,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 08:12:03,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 08:12:03,110 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 08:12:03,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 08:12:03,110 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 08:12:03,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 08:12:03,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 08:12:03,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 08:12:03,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 08:12:03,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 08:12:03,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 08:12:03,111 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 08:12:03,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 08:12:03,111 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 08:12:03,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 08:12:03,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 08:12:03,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 08:12:03,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 08:12:03,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 08:12:03,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 08:12:03,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 08:12:03,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 08:12:03,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 08:12:03,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 08:12:03,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 08:12:03,113 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 08:12:03,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 08:12:03,113 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 08:12:03,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 08:12:03,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 08:12:03,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 08:12:03,337 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 08:12:03,338 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 08:12:03,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-01-28 08:12:04,472 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 08:12:04,690 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 08:12:04,691 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-01-28 08:12:04,711 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d68aaae61/be682fc288264653a5a312ed85daec11/FLAGfe5298ed1 [2023-01-28 08:12:04,724 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d68aaae61/be682fc288264653a5a312ed85daec11 [2023-01-28 08:12:04,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 08:12:04,728 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 08:12:04,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 08:12:04,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 08:12:04,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 08:12:04,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 08:12:04" (1/1) ... [2023-01-28 08:12:04,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d96013f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:04, skipping insertion in model container [2023-01-28 08:12:04,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 08:12:04" (1/1) ... [2023-01-28 08:12:04,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 08:12:04,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 08:12:05,143 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-01-28 08:12:05,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 08:12:05,197 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 08:12:05,238 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2023-01-28 08:12:05,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 08:12:05,322 INFO L208 MainTranslator]: Completed translation [2023-01-28 08:12:05,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05 WrapperNode [2023-01-28 08:12:05,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 08:12:05,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 08:12:05,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 08:12:05,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 08:12:05,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (1/1) ... [2023-01-28 08:12:05,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (1/1) ... [2023-01-28 08:12:05,394 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-01-28 08:12:05,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 08:12:05,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 08:12:05,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 08:12:05,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 08:12:05,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (1/1) ... [2023-01-28 08:12:05,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (1/1) ... [2023-01-28 08:12:05,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (1/1) ... [2023-01-28 08:12:05,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (1/1) ... [2023-01-28 08:12:05,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (1/1) ... [2023-01-28 08:12:05,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (1/1) ... [2023-01-28 08:12:05,428 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (1/1) ... [2023-01-28 08:12:05,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (1/1) ... [2023-01-28 08:12:05,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 08:12:05,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 08:12:05,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 08:12:05,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 08:12:05,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (1/1) ... [2023-01-28 08:12:05,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 08:12:05,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:05,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 08:12:05,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 08:12:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 08:12:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 08:12:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 08:12:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 08:12:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 08:12:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 08:12:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 08:12:05,506 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 08:12:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 08:12:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 08:12:05,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 08:12:05,508 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 08:12:05,721 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 08:12:05,723 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 08:12:05,960 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 08:12:05,968 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 08:12:05,968 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-01-28 08:12:05,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 08:12:05 BoogieIcfgContainer [2023-01-28 08:12:05,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 08:12:05,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 08:12:05,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 08:12:05,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 08:12:05,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 08:12:04" (1/3) ... [2023-01-28 08:12:05,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faca28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 08:12:05, skipping insertion in model container [2023-01-28 08:12:05,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 08:12:05" (2/3) ... [2023-01-28 08:12:05,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faca28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 08:12:05, skipping insertion in model container [2023-01-28 08:12:05,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 08:12:05" (3/3) ... [2023-01-28 08:12:05,977 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-01-28 08:12:05,991 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 08:12:05,991 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-28 08:12:05,991 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 08:12:06,051 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 08:12:06,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 394 flow [2023-01-28 08:12:06,207 INFO L130 PetriNetUnfolder]: 45/263 cut-off events. [2023-01-28 08:12:06,207 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-01-28 08:12:06,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 263 events. 45/263 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 814 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-01-28 08:12:06,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 394 flow [2023-01-28 08:12:06,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 188 transitions, 381 flow [2023-01-28 08:12:06,229 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:12:06,248 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 188 transitions, 381 flow [2023-01-28 08:12:06,250 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 188 transitions, 381 flow [2023-01-28 08:12:06,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 188 transitions, 381 flow [2023-01-28 08:12:06,305 INFO L130 PetriNetUnfolder]: 44/258 cut-off events. [2023-01-28 08:12:06,306 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:12:06,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 258 events. 44/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 778 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-01-28 08:12:06,316 INFO L119 LiptonReduction]: Number of co-enabled transitions 10792 [2023-01-28 08:12:08,887 INFO L134 LiptonReduction]: Checked pairs total: 17790 [2023-01-28 08:12:08,887 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-01-28 08:12:08,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 08:12:08,906 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;@2a30d4de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:12:08,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 08:12:08,910 INFO L130 PetriNetUnfolder]: 5/27 cut-off events. [2023-01-28 08:12:08,910 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:12:08,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:08,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-28 08:12:08,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:12:08,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1355205613, now seen corresponding path program 1 times [2023-01-28 08:12:08,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:08,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809437557] [2023-01-28 08:12:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:08,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:09,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:09,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809437557] [2023-01-28 08:12:09,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809437557] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:12:09,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:12:09,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:12:09,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584999061] [2023-01-28 08:12:09,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:12:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:12:09,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:09,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:12:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:12:09,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-28 08:12:09,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:09,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:09,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-28 08:12:09,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:09,263 INFO L130 PetriNetUnfolder]: 272/614 cut-off events. [2023-01-28 08:12:09,263 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:12:09,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 614 events. 272/614 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3057 event pairs, 238 based on Foata normal form. 118/640 useless extension candidates. Maximal degree in co-relation 1094. Up to 528 conditions per place. [2023-01-28 08:12:09,267 INFO L137 encePairwiseOnDemand]: 332/357 looper letters, 34 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-01-28 08:12:09,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-01-28 08:12:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:12:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:12:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-01-28 08:12:09,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892623716153128 [2023-01-28 08:12:09,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-01-28 08:12:09,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-01-28 08:12:09,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:09,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-01-28 08:12:09,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:09,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:09,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:09,296 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 524 transitions. [2023-01-28 08:12:09,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-01-28 08:12:09,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 08:12:09,300 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 105 flow [2023-01-28 08:12:09,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-01-28 08:12:09,305 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-01-28 08:12:09,305 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 105 flow [2023-01-28 08:12:09,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:09,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:09,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:12:09,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 08:12:09,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:12:09,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:09,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1202044733, now seen corresponding path program 1 times [2023-01-28 08:12:09,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:09,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169357820] [2023-01-28 08:12:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:09,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:09,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:09,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169357820] [2023-01-28 08:12:09,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169357820] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:12:09,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679192686] [2023-01-28 08:12:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:09,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:09,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:09,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:12:09,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 08:12:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:09,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-28 08:12:09,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:12:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:12:09,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 08:12:09,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679192686] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:12:09,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 08:12:09,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-28 08:12:09,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601792546] [2023-01-28 08:12:09,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:12:09,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:12:09,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:09,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:12:09,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 08:12:09,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-28 08:12:09,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:09,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:09,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-28 08:12:09,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:09,667 INFO L130 PetriNetUnfolder]: 255/592 cut-off events. [2023-01-28 08:12:09,668 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:12:09,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 592 events. 255/592 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3266 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 1120. Up to 497 conditions per place. [2023-01-28 08:12:09,671 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 49 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-01-28 08:12:09,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 237 flow [2023-01-28 08:12:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:12:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:12:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-01-28 08:12:09,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48179271708683474 [2023-01-28 08:12:09,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-01-28 08:12:09,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-01-28 08:12:09,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:09,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-01-28 08:12:09,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:09,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:09,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:09,679 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 105 flow. Second operand 3 states and 516 transitions. [2023-01-28 08:12:09,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 237 flow [2023-01-28 08:12:09,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 233 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 08:12:09,683 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 109 flow [2023-01-28 08:12:09,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-01-28 08:12:09,684 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-01-28 08:12:09,684 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 109 flow [2023-01-28 08:12:09,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:09,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:09,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:12:09,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 08:12:09,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:09,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:12:09,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash -96419517, now seen corresponding path program 1 times [2023-01-28 08:12:09,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:09,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327703422] [2023-01-28 08:12:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:09,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:09,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327703422] [2023-01-28 08:12:09,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327703422] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:12:09,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130943725] [2023-01-28 08:12:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:09,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:09,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:09,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:12:10,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 08:12:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:10,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 08:12:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:12:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:10,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:12:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:10,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130943725] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:12:10,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:12:10,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 08:12:10,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995852527] [2023-01-28 08:12:10,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:12:10,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 08:12:10,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:10,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 08:12:10,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 08:12:10,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-28 08:12:10,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 109 flow. Second operand has 7 states, 7 states have (on average 156.85714285714286) internal successors, (1098), 7 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:10,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:10,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-28 08:12:10,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:10,288 INFO L130 PetriNetUnfolder]: 271/599 cut-off events. [2023-01-28 08:12:10,288 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-01-28 08:12:10,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 599 events. 271/599 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2938 event pairs, 238 based on Foata normal form. 3/529 useless extension candidates. Maximal degree in co-relation 1149. Up to 513 conditions per place. [2023-01-28 08:12:10,290 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 34 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-01-28 08:12:10,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 199 flow [2023-01-28 08:12:10,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 08:12:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 08:12:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 972 transitions. [2023-01-28 08:12:10,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453781512605042 [2023-01-28 08:12:10,293 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 972 transitions. [2023-01-28 08:12:10,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 972 transitions. [2023-01-28 08:12:10,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:10,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 972 transitions. [2023-01-28 08:12:10,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:10,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:10,300 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:10,300 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 109 flow. Second operand 6 states and 972 transitions. [2023-01-28 08:12:10,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 199 flow [2023-01-28 08:12:10,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 08:12:10,302 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 141 flow [2023-01-28 08:12:10,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-01-28 08:12:10,303 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-01-28 08:12:10,303 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 141 flow [2023-01-28 08:12:10,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.85714285714286) internal successors, (1098), 7 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:10,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:10,304 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:12:10,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 08:12:10,509 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,SelfDestructingSolverStorable2 [2023-01-28 08:12:10,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:12:10,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:10,510 INFO L85 PathProgramCache]: Analyzing trace with hash -888320147, now seen corresponding path program 2 times [2023-01-28 08:12:10,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:10,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486858083] [2023-01-28 08:12:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:10,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:10,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486858083] [2023-01-28 08:12:10,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486858083] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:12:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467252134] [2023-01-28 08:12:10,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:12:10,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:10,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:10,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:12:10,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 08:12:10,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 08:12:10,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:12:10,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-28 08:12:10,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:12:10,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:12:10,803 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:12:10,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:12:10,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:12:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:12:10,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 08:12:10,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467252134] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:12:10,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 08:12:10,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-28 08:12:10,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177036263] [2023-01-28 08:12:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:12:10,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 08:12:10,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:10,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 08:12:10,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 08:12:10,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 357 [2023-01-28 08:12:10,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 141 flow. Second operand has 6 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:10,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:10,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 357 [2023-01-28 08:12:10,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:11,125 INFO L130 PetriNetUnfolder]: 278/643 cut-off events. [2023-01-28 08:12:11,125 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 08:12:11,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 643 events. 278/643 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3319 event pairs, 37 based on Foata normal form. 0/592 useless extension candidates. Maximal degree in co-relation 1242. Up to 369 conditions per place. [2023-01-28 08:12:11,128 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 43 selfloop transitions, 6 changer transitions 25/81 dead transitions. [2023-01-28 08:12:11,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 359 flow [2023-01-28 08:12:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 08:12:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 08:12:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 692 transitions. [2023-01-28 08:12:11,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3876750700280112 [2023-01-28 08:12:11,130 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 692 transitions. [2023-01-28 08:12:11,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 692 transitions. [2023-01-28 08:12:11,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:11,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 692 transitions. [2023-01-28 08:12:11,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:11,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:11,136 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:11,136 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 141 flow. Second operand 5 states and 692 transitions. [2023-01-28 08:12:11,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 359 flow [2023-01-28 08:12:11,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 345 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 08:12:11,140 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 145 flow [2023-01-28 08:12:11,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-01-28 08:12:11,141 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2023-01-28 08:12:11,142 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 145 flow [2023-01-28 08:12:11,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:11,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:11,142 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:12:11,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 08:12:11,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:11,349 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 08:12:11,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:11,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1713486904, now seen corresponding path program 1 times [2023-01-28 08:12:11,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:11,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615140305] [2023-01-28 08:12:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:11,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:12:11,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:11,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615140305] [2023-01-28 08:12:11,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615140305] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:12:11,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819699166] [2023-01-28 08:12:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:11,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:11,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:11,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:12:11,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 08:12:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:11,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 08:12:11,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:12:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:12:11,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:12:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:12:11,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819699166] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:12:11,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:12:11,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-01-28 08:12:11,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008093611] [2023-01-28 08:12:11,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:12:11,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 08:12:11,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:11,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 08:12:11,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-01-28 08:12:11,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 357 [2023-01-28 08:12:11,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 145 flow. Second operand has 14 states, 14 states have (on average 151.21428571428572) internal successors, (2117), 14 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:11,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:11,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 357 [2023-01-28 08:12:11,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:11,637 INFO L130 PetriNetUnfolder]: 23/76 cut-off events. [2023-01-28 08:12:11,637 INFO L131 PetriNetUnfolder]: For 121/121 co-relation queries the response was YES. [2023-01-28 08:12:11,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 76 events. 23/76 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 141 event pairs, 0 based on Foata normal form. 18/91 useless extension candidates. Maximal degree in co-relation 155. Up to 46 conditions per place. [2023-01-28 08:12:11,638 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-01-28 08:12:11,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 43 transitions, 234 flow [2023-01-28 08:12:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:12:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:12:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2132 transitions. [2023-01-28 08:12:11,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42657062825130054 [2023-01-28 08:12:11,643 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2132 transitions. [2023-01-28 08:12:11,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2132 transitions. [2023-01-28 08:12:11,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:11,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2132 transitions. [2023-01-28 08:12:11,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 152.28571428571428) internal successors, (2132), 14 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:11,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 357.0) internal successors, (5355), 15 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:11,654 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 357.0) internal successors, (5355), 15 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:11,654 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 145 flow. Second operand 14 states and 2132 transitions. [2023-01-28 08:12:11,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 43 transitions, 234 flow [2023-01-28 08:12:11,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 213 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-01-28 08:12:11,656 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-01-28 08:12:11,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-01-28 08:12:11,657 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-01-28 08:12:11,657 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-01-28 08:12:11,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 151.21428571428572) internal successors, (2117), 14 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:11,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 08:12:11,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-28 08:12:11,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-28 08:12:11,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 08:12:11,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:11,869 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-01-28 08:12:11,871 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-01-28 08:12:11,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 394 flow [2023-01-28 08:12:11,892 INFO L130 PetriNetUnfolder]: 45/263 cut-off events. [2023-01-28 08:12:11,893 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-01-28 08:12:11,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 263 events. 45/263 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 814 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-01-28 08:12:11,894 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 394 flow [2023-01-28 08:12:11,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 188 transitions, 381 flow [2023-01-28 08:12:11,895 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:12:11,896 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 188 transitions, 381 flow [2023-01-28 08:12:11,896 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 188 transitions, 381 flow [2023-01-28 08:12:11,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 188 transitions, 381 flow [2023-01-28 08:12:11,913 INFO L130 PetriNetUnfolder]: 44/258 cut-off events. [2023-01-28 08:12:11,914 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:12:11,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 258 events. 44/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 778 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-01-28 08:12:11,919 INFO L119 LiptonReduction]: Number of co-enabled transitions 10792 [2023-01-28 08:12:14,149 INFO L134 LiptonReduction]: Checked pairs total: 17496 [2023-01-28 08:12:14,150 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-01-28 08:12:14,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 08:12:14,152 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;@2a30d4de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:12:14,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 08:12:14,155 INFO L130 PetriNetUnfolder]: 7/31 cut-off events. [2023-01-28 08:12:14,155 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:12:14,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:14,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-28 08:12:14,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:12:14,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:14,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1690553009, now seen corresponding path program 1 times [2023-01-28 08:12:14,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:14,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669014531] [2023-01-28 08:12:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:14,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 08:12:14,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:14,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669014531] [2023-01-28 08:12:14,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669014531] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:12:14,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:12:14,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:12:14,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596508922] [2023-01-28 08:12:14,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:12:14,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:12:14,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:14,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:12:14,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:12:14,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 355 [2023-01-28 08:12:14,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:14,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 355 [2023-01-28 08:12:14,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:14,270 INFO L130 PetriNetUnfolder]: 272/614 cut-off events. [2023-01-28 08:12:14,271 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:12:14,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 614 events. 272/614 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3050 event pairs, 238 based on Foata normal form. 118/640 useless extension candidates. Maximal degree in co-relation 1094. Up to 528 conditions per place. [2023-01-28 08:12:14,273 INFO L137 encePairwiseOnDemand]: 330/355 looper letters, 20 selfloop transitions, 2 changer transitions 18/45 dead transitions. [2023-01-28 08:12:14,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-01-28 08:12:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:12:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:12:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-01-28 08:12:14,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.492018779342723 [2023-01-28 08:12:14,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-01-28 08:12:14,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-01-28 08:12:14,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:14,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-01-28 08:12:14,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,278 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 524 transitions. [2023-01-28 08:12:14,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-01-28 08:12:14,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 08:12:14,279 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 69 flow [2023-01-28 08:12:14,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=47, PETRI_TRANSITIONS=27} [2023-01-28 08:12:14,281 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-01-28 08:12:14,281 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 69 flow [2023-01-28 08:12:14,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:14,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 08:12:14,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 08:12:14,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:12:14,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:14,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1112596279, now seen corresponding path program 1 times [2023-01-28 08:12:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:14,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269409130] [2023-01-28 08:12:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:14,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 08:12:14,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:14,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269409130] [2023-01-28 08:12:14,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269409130] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:12:14,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926993740] [2023-01-28 08:12:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:14,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:14,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:14,329 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:12:14,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 08:12:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 08:12:14,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:12:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 08:12:14,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:12:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 08:12:14,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926993740] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:12:14,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:12:14,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 08:12:14,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623346374] [2023-01-28 08:12:14,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:12:14,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 08:12:14,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 08:12:14,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 08:12:14,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 355 [2023-01-28 08:12:14,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:14,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 355 [2023-01-28 08:12:14,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:14,466 INFO L130 PetriNetUnfolder]: 47/129 cut-off events. [2023-01-28 08:12:14,467 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:12:14,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 129 events. 47/129 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 381 event pairs, 42 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 245. Up to 108 conditions per place. [2023-01-28 08:12:14,467 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-01-28 08:12:14,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 131 flow [2023-01-28 08:12:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 08:12:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 08:12:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 958 transitions. [2023-01-28 08:12:14,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497652582159624 [2023-01-28 08:12:14,470 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 958 transitions. [2023-01-28 08:12:14,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 958 transitions. [2023-01-28 08:12:14,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:14,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 958 transitions. [2023-01-28 08:12:14,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.66666666666666) internal successors, (958), 6 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,476 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,476 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 69 flow. Second operand 6 states and 958 transitions. [2023-01-28 08:12:14,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 131 flow [2023-01-28 08:12:14,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 08:12:14,477 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 101 flow [2023-01-28 08:12:14,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-01-28 08:12:14,478 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-01-28 08:12:14,478 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 101 flow [2023-01-28 08:12:14,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:14,479 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-28 08:12:14,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 08:12:14,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:14,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:12:14,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:14,685 INFO L85 PathProgramCache]: Analyzing trace with hash -374883279, now seen corresponding path program 2 times [2023-01-28 08:12:14,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:14,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792907469] [2023-01-28 08:12:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:14,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 08:12:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792907469] [2023-01-28 08:12:14,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792907469] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:12:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810593933] [2023-01-28 08:12:14,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:12:14,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:14,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:14,746 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:12:14,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 08:12:14,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:12:14,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:12:14,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 08:12:14,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:12:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 08:12:14,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:12:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 08:12:14,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810593933] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:12:14,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:12:14,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 08:12:14,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907682459] [2023-01-28 08:12:14,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:12:14,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 08:12:14,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:14,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 08:12:14,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 08:12:14,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 355 [2023-01-28 08:12:14,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 156.30769230769232) internal successors, (2032), 13 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:14,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 355 [2023-01-28 08:12:14,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:14,918 INFO L130 PetriNetUnfolder]: 47/135 cut-off events. [2023-01-28 08:12:14,918 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 08:12:14,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 135 events. 47/135 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 381 event pairs, 42 based on Foata normal form. 6/117 useless extension candidates. Maximal degree in co-relation 236. Up to 108 conditions per place. [2023-01-28 08:12:14,919 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 20 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-01-28 08:12:14,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 199 flow [2023-01-28 08:12:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 08:12:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 08:12:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1897 transitions. [2023-01-28 08:12:14,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453051643192488 [2023-01-28 08:12:14,924 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1897 transitions. [2023-01-28 08:12:14,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1897 transitions. [2023-01-28 08:12:14,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:14,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1897 transitions. [2023-01-28 08:12:14,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 158.08333333333334) internal successors, (1897), 12 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 355.0) internal successors, (4615), 13 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,934 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 355.0) internal successors, (4615), 13 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,934 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 101 flow. Second operand 12 states and 1897 transitions. [2023-01-28 08:12:14,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 199 flow [2023-01-28 08:12:14,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 185 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 08:12:14,936 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 171 flow [2023-01-28 08:12:14,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2023-01-28 08:12:14,936 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-01-28 08:12:14,936 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 171 flow [2023-01-28 08:12:14,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.30769230769232) internal successors, (2032), 13 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:14,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:14,938 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-28 08:12:14,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 08:12:15,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:15,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:12:15,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:15,146 INFO L85 PathProgramCache]: Analyzing trace with hash 832355953, now seen corresponding path program 3 times [2023-01-28 08:12:15,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:15,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077738675] [2023-01-28 08:12:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:15,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:12:15,184 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 08:12:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:12:15,220 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 08:12:15,220 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 08:12:15,221 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 08:12:15,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 08:12:15,221 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 08:12:15,222 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 08:12:15,222 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 08:12:15,222 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 08:12:15,262 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 08:12:15,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-01-28 08:12:15,300 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-01-28 08:12:15,300 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-28 08:12:15,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-01-28 08:12:15,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 266 transitions, 550 flow [2023-01-28 08:12:15,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 266 transitions, 550 flow [2023-01-28 08:12:15,307 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:12:15,307 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 266 transitions, 550 flow [2023-01-28 08:12:15,307 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 266 transitions, 550 flow [2023-01-28 08:12:15,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-01-28 08:12:15,356 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-01-28 08:12:15,357 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-28 08:12:15,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-01-28 08:12:15,375 INFO L119 LiptonReduction]: Number of co-enabled transitions 33228 [2023-01-28 08:12:18,259 INFO L134 LiptonReduction]: Checked pairs total: 57444 [2023-01-28 08:12:18,259 INFO L136 LiptonReduction]: Total number of compositions: 223 [2023-01-28 08:12:18,261 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 08:12:18,261 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;@2a30d4de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:12:18,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 08:12:18,264 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-28 08:12:18,264 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:12:18,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:18,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-28 08:12:18,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:12:18,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1267872476, now seen corresponding path program 1 times [2023-01-28 08:12:18,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:18,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446912376] [2023-01-28 08:12:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:18,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:18,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:18,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446912376] [2023-01-28 08:12:18,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446912376] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:12:18,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:12:18,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:12:18,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949561799] [2023-01-28 08:12:18,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:12:18,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:12:18,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:18,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:12:18,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:12:18,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 489 [2023-01-28 08:12:18,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:18,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:18,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 489 [2023-01-28 08:12:18,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:19,464 INFO L130 PetriNetUnfolder]: 10521/16515 cut-off events. [2023-01-28 08:12:19,464 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-28 08:12:19,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32050 conditions, 16515 events. 10521/16515 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 109597 event pairs, 9818 based on Foata normal form. 2499/16448 useless extension candidates. Maximal degree in co-relation 13969. Up to 15431 conditions per place. [2023-01-28 08:12:19,537 INFO L137 encePairwiseOnDemand]: 455/489 looper letters, 56 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-01-28 08:12:19,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-01-28 08:12:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:12:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:12:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2023-01-28 08:12:19,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49693251533742333 [2023-01-28 08:12:19,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2023-01-28 08:12:19,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2023-01-28 08:12:19,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:19,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2023-01-28 08:12:19,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:19,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:19,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:19,544 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 729 transitions. [2023-01-28 08:12:19,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-01-28 08:12:19,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 08:12:19,547 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2023-01-28 08:12:19,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-01-28 08:12:19,547 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-01-28 08:12:19,548 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2023-01-28 08:12:19,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:19,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:19,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:12:19,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 08:12:19,548 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:12:19,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:19,549 INFO L85 PathProgramCache]: Analyzing trace with hash 339768936, now seen corresponding path program 1 times [2023-01-28 08:12:19,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:19,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48256484] [2023-01-28 08:12:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:19,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:19,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:19,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48256484] [2023-01-28 08:12:19,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48256484] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:12:19,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234474942] [2023-01-28 08:12:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:19,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:19,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:19,585 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:12:19,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 08:12:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:19,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-28 08:12:19,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:12:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:12:19,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 08:12:19,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234474942] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:12:19,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 08:12:19,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-28 08:12:19,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428130734] [2023-01-28 08:12:19,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:12:19,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:12:19,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:19,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:12:19,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 08:12:19,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 489 [2023-01-28 08:12:19,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:19,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:19,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 489 [2023-01-28 08:12:19,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:20,810 INFO L130 PetriNetUnfolder]: 10399/16491 cut-off events. [2023-01-28 08:12:20,811 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-01-28 08:12:20,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32041 conditions, 16491 events. 10399/16491 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 111617 event pairs, 4650 based on Foata normal form. 0/13963 useless extension candidates. Maximal degree in co-relation 32028. Up to 15399 conditions per place. [2023-01-28 08:12:20,917 INFO L137 encePairwiseOnDemand]: 486/489 looper letters, 74 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-01-28 08:12:20,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 356 flow [2023-01-28 08:12:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:12:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:12:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 715 transitions. [2023-01-28 08:12:20,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48738922972051807 [2023-01-28 08:12:20,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 715 transitions. [2023-01-28 08:12:20,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 715 transitions. [2023-01-28 08:12:20,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:20,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 715 transitions. [2023-01-28 08:12:20,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:20,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:20,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:20,925 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 715 transitions. [2023-01-28 08:12:20,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 356 flow [2023-01-28 08:12:20,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 352 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 08:12:20,927 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2023-01-28 08:12:20,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-01-28 08:12:20,928 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-01-28 08:12:20,928 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2023-01-28 08:12:20,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:20,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:20,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:12:20,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 08:12:21,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:21,135 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:12:21,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash -953345288, now seen corresponding path program 1 times [2023-01-28 08:12:21,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:21,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121703448] [2023-01-28 08:12:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:21,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:21,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:21,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121703448] [2023-01-28 08:12:21,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121703448] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:12:21,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500001082] [2023-01-28 08:12:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:21,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:21,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:21,188 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:12:21,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 08:12:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:21,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 08:12:21,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:12:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:21,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:12:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:21,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500001082] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:12:21,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:12:21,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 08:12:21,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305936403] [2023-01-28 08:12:21,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:12:21,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 08:12:21,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 08:12:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 08:12:21,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 489 [2023-01-28 08:12:21,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:21,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:21,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 489 [2023-01-28 08:12:21,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:22,454 INFO L130 PetriNetUnfolder]: 10623/16504 cut-off events. [2023-01-28 08:12:22,454 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2023-01-28 08:12:22,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32633 conditions, 16504 events. 10623/16504 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 108095 event pairs, 9818 based on Foata normal form. 3/14244 useless extension candidates. Maximal degree in co-relation 32605. Up to 15417 conditions per place. [2023-01-28 08:12:22,519 INFO L137 encePairwiseOnDemand]: 486/489 looper letters, 57 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-01-28 08:12:22,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 312 flow [2023-01-28 08:12:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 08:12:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 08:12:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1342 transitions. [2023-01-28 08:12:22,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45739604635310155 [2023-01-28 08:12:22,523 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1342 transitions. [2023-01-28 08:12:22,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1342 transitions. [2023-01-28 08:12:22,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:22,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1342 transitions. [2023-01-28 08:12:22,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.66666666666666) internal successors, (1342), 6 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:22,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:22,542 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:22,543 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1342 transitions. [2023-01-28 08:12:22,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 312 flow [2023-01-28 08:12:22,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:12:22,545 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2023-01-28 08:12:22,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-01-28 08:12:22,546 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-01-28 08:12:22,546 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2023-01-28 08:12:22,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:22,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:22,547 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:12:22,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-28 08:12:22,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 08:12:22,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:12:22,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:22,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1739017580, now seen corresponding path program 2 times [2023-01-28 08:12:22,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:22,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117433559] [2023-01-28 08:12:22,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:22,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:12:22,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:22,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117433559] [2023-01-28 08:12:22,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117433559] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:12:22,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947002191] [2023-01-28 08:12:22,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:12:22,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:22,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:22,941 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:12:22,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 08:12:23,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 08:12:23,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:12:23,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-28 08:12:23,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:12:23,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:12:23,075 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:12:23,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:12:23,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:12:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:12:23,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 08:12:23,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947002191] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:12:23,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 08:12:23,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-28 08:12:23,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344772227] [2023-01-28 08:12:23,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:12:23,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 08:12:23,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:23,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 08:12:23,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 08:12:23,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 489 [2023-01-28 08:12:23,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 177.5) internal successors, (1065), 6 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:23,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:23,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 489 [2023-01-28 08:12:23,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:24,384 INFO L130 PetriNetUnfolder]: 11304/17827 cut-off events. [2023-01-28 08:12:24,384 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2023-01-28 08:12:24,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35586 conditions, 17827 events. 11304/17827 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 121293 event pairs, 2905 based on Foata normal form. 0/15763 useless extension candidates. Maximal degree in co-relation 35550. Up to 13514 conditions per place. [2023-01-28 08:12:24,431 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 126 selfloop transitions, 14 changer transitions 14/165 dead transitions. [2023-01-28 08:12:24,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 165 transitions, 731 flow [2023-01-28 08:12:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 08:12:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 08:12:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1211 transitions. [2023-01-28 08:12:24,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.412747102931152 [2023-01-28 08:12:24,434 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1211 transitions. [2023-01-28 08:12:24,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1211 transitions. [2023-01-28 08:12:24,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:24,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1211 transitions. [2023-01-28 08:12:24,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.83333333333334) internal successors, (1211), 6 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:24,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:24,441 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:24,441 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 6 states and 1211 transitions. [2023-01-28 08:12:24,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 165 transitions, 731 flow [2023-01-28 08:12:24,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 165 transitions, 717 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 08:12:24,444 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 293 flow [2023-01-28 08:12:24,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-01-28 08:12:24,444 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 20 predicate places. [2023-01-28 08:12:24,444 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 293 flow [2023-01-28 08:12:24,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 177.5) internal successors, (1065), 6 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:24,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:24,445 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:12:24,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 08:12:24,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 08:12:24,651 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:12:24,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:24,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1058932086, now seen corresponding path program 1 times [2023-01-28 08:12:24,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:24,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736953750] [2023-01-28 08:12:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:24,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:12:24,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:24,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736953750] [2023-01-28 08:12:24,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736953750] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:12:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309541635] [2023-01-28 08:12:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:24,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:24,704 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:12:24,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 08:12:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:24,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 08:12:24,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:12:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:12:24,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:12:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:12:24,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309541635] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:12:24,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:12:24,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-01-28 08:12:24,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366944573] [2023-01-28 08:12:24,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:12:24,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 08:12:24,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:24,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 08:12:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-01-28 08:12:24,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 489 [2023-01-28 08:12:24,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 293 flow. Second operand has 14 states, 14 states have (on average 209.35714285714286) internal successors, (2931), 14 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:24,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:24,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 489 [2023-01-28 08:12:24,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:25,894 INFO L130 PetriNetUnfolder]: 10535/17459 cut-off events. [2023-01-28 08:12:25,894 INFO L131 PetriNetUnfolder]: For 5519/5519 co-relation queries the response was YES. [2023-01-28 08:12:25,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38652 conditions, 17459 events. 10535/17459 cut-off events. For 5519/5519 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 127423 event pairs, 178 based on Foata normal form. 23/16526 useless extension candidates. Maximal degree in co-relation 38593. Up to 15345 conditions per place. [2023-01-28 08:12:25,967 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 118 selfloop transitions, 14 changer transitions 0/144 dead transitions. [2023-01-28 08:12:25,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 144 transitions, 735 flow [2023-01-28 08:12:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:12:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:12:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3021 transitions. [2023-01-28 08:12:25,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412795793163891 [2023-01-28 08:12:25,975 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3021 transitions. [2023-01-28 08:12:25,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3021 transitions. [2023-01-28 08:12:25,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:25,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3021 transitions. [2023-01-28 08:12:25,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 215.78571428571428) internal successors, (3021), 14 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:25,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:25,991 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:25,991 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 293 flow. Second operand 14 states and 3021 transitions. [2023-01-28 08:12:25,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 144 transitions, 735 flow [2023-01-28 08:12:26,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 144 transitions, 735 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 08:12:26,004 INFO L231 Difference]: Finished difference. Result has 102 places, 92 transitions, 363 flow [2023-01-28 08:12:26,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=363, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2023-01-28 08:12:26,005 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 34 predicate places. [2023-01-28 08:12:26,005 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 363 flow [2023-01-28 08:12:26,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 209.35714285714286) internal successors, (2931), 14 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:26,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:26,006 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:12:26,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 08:12:26,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 08:12:26,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:12:26,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1799710142, now seen corresponding path program 1 times [2023-01-28 08:12:26,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:26,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527396186] [2023-01-28 08:12:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:26,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 08:12:26,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:26,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527396186] [2023-01-28 08:12:26,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527396186] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:12:26,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:12:26,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 08:12:26,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995779948] [2023-01-28 08:12:26,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:12:26,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 08:12:26,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:12:26,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 08:12:26,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 08:12:26,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 489 [2023-01-28 08:12:26,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:26,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:12:26,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 489 [2023-01-28 08:12:26,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:12:27,123 INFO L130 PetriNetUnfolder]: 5721/10402 cut-off events. [2023-01-28 08:12:27,124 INFO L131 PetriNetUnfolder]: For 3723/3723 co-relation queries the response was YES. [2023-01-28 08:12:27,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24232 conditions, 10402 events. 5721/10402 cut-off events. For 3723/3723 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 76238 event pairs, 2200 based on Foata normal form. 1522/11005 useless extension candidates. Maximal degree in co-relation 24159. Up to 5552 conditions per place. [2023-01-28 08:12:27,176 INFO L137 encePairwiseOnDemand]: 468/489 looper letters, 118 selfloop transitions, 21 changer transitions 2/150 dead transitions. [2023-01-28 08:12:27,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 150 transitions, 846 flow [2023-01-28 08:12:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 08:12:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 08:12:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 796 transitions. [2023-01-28 08:12:27,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069529652351738 [2023-01-28 08:12:27,179 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 796 transitions. [2023-01-28 08:12:27,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 796 transitions. [2023-01-28 08:12:27,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:12:27,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 796 transitions. [2023-01-28 08:12:27,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:27,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:27,184 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:27,184 INFO L175 Difference]: Start difference. First operand has 102 places, 92 transitions, 363 flow. Second operand 4 states and 796 transitions. [2023-01-28 08:12:27,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 150 transitions, 846 flow [2023-01-28 08:12:27,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 150 transitions, 773 flow, removed 26 selfloop flow, removed 10 redundant places. [2023-01-28 08:12:27,195 INFO L231 Difference]: Finished difference. Result has 96 places, 103 transitions, 399 flow [2023-01-28 08:12:27,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=399, PETRI_PLACES=96, PETRI_TRANSITIONS=103} [2023-01-28 08:12:27,196 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 28 predicate places. [2023-01-28 08:12:27,196 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 103 transitions, 399 flow [2023-01-28 08:12:27,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:12:27,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:12:27,196 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:12:27,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-28 08:12:27,197 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:12:27,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:12:27,197 INFO L85 PathProgramCache]: Analyzing trace with hash 641537200, now seen corresponding path program 1 times [2023-01-28 08:12:27,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:12:27,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218829509] [2023-01-28 08:12:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:27,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:12:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 08:12:30,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:12:30,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218829509] [2023-01-28 08:12:30,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218829509] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:12:30,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636868251] [2023-01-28 08:12:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:12:30,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:12:30,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:12:30,893 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:12:30,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 08:12:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:12:31,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 08:12:31,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:12:31,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:12:31,174 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:12:31,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:12:31,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:12:31,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:12:31,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:12:31,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:12:31,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:12:31,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:12:31,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:12:31,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:12:31,512 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:12:31,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:12:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:12:31,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:12:31,770 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_463 Int) (|v_t_funThread2of2ForFork0_~i~0#1_77| Int) (v_ArrVal_464 (Array Int Int))) (let ((.cse0 (* |v_t_funThread2of2ForFork0_~i~0#1_77| 28))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_77| 1) (not (= 0 (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_464) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))))) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_77|) (= (select (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) v_ArrVal_463) (+ .cse0 |c_~#a~0.offset|)) 0)))) is different from false [2023-01-28 08:12:31,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:12:31,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-01-28 08:12:31,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:12:31,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-01-28 08:12:31,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 08:12:58,227 WARN L839 $PredicateComparison]: unable to prove that (and (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((v_ArrVal_458 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_77| Int)) (or (forall ((|v_t_funThread1of2ForFork0_~i~0#1_87| Int) (v_ArrVal_463 Int) (|~#a~0.offset| Int)) (or (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_458) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_87| 28) |~#a~0.offset|) v_ArrVal_463) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_77| 28) |~#a~0.offset|)) 0) (= |v_t_funThread2of2ForFork0_~i~0#1_77| |v_t_funThread1of2ForFork0_~i~0#1_87|))) (< |v_t_funThread2of2ForFork0_~i~0#1_77| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_77|)))) is different from false [2023-01-28 08:13:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-01-28 08:13:01,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636868251] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:13:01,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:13:01,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 30 [2023-01-28 08:13:01,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746644873] [2023-01-28 08:13:01,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:13:01,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 08:13:01,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:13:01,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 08:13:01,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=649, Unknown=9, NotChecked=114, Total=992 [2023-01-28 08:13:01,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 489 [2023-01-28 08:13:01,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 399 flow. Second operand has 32 states, 32 states have (on average 143.875) internal successors, (4604), 32 states have internal predecessors, (4604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:13:01,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:13:01,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 489 [2023-01-28 08:13:01,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:13:04,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 08:13:09,311 INFO L130 PetriNetUnfolder]: 7678/13914 cut-off events. [2023-01-28 08:13:09,311 INFO L131 PetriNetUnfolder]: For 7310/7342 co-relation queries the response was YES. [2023-01-28 08:13:09,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38106 conditions, 13914 events. 7678/13914 cut-off events. For 7310/7342 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 107052 event pairs, 926 based on Foata normal form. 13/12696 useless extension candidates. Maximal degree in co-relation 36953. Up to 7505 conditions per place. [2023-01-28 08:13:09,386 INFO L137 encePairwiseOnDemand]: 473/489 looper letters, 277 selfloop transitions, 95 changer transitions 110/491 dead transitions. [2023-01-28 08:13:09,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 491 transitions, 2800 flow [2023-01-28 08:13:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 08:13:09,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 08:13:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4404 transitions. [2023-01-28 08:13:09,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32164767747589834 [2023-01-28 08:13:09,397 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4404 transitions. [2023-01-28 08:13:09,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4404 transitions. [2023-01-28 08:13:09,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:13:09,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4404 transitions. [2023-01-28 08:13:09,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 157.28571428571428) internal successors, (4404), 28 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:13:09,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:13:09,426 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:13:09,426 INFO L175 Difference]: Start difference. First operand has 96 places, 103 transitions, 399 flow. Second operand 28 states and 4404 transitions. [2023-01-28 08:13:09,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 491 transitions, 2800 flow [2023-01-28 08:13:09,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 491 transitions, 2799 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:13:09,450 INFO L231 Difference]: Finished difference. Result has 129 places, 176 transitions, 975 flow [2023-01-28 08:13:09,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=975, PETRI_PLACES=129, PETRI_TRANSITIONS=176} [2023-01-28 08:13:09,451 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 61 predicate places. [2023-01-28 08:13:09,451 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 176 transitions, 975 flow [2023-01-28 08:13:09,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 143.875) internal successors, (4604), 32 states have internal predecessors, (4604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:13:09,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:13:09,452 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:13:09,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 08:13:09,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 08:13:09,658 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:13:09,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:13:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1241005934, now seen corresponding path program 2 times [2023-01-28 08:13:09,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:13:09,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290025855] [2023-01-28 08:13:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:09,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:13:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:13:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:13:10,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:13:10,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290025855] [2023-01-28 08:13:10,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290025855] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:13:10,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757608075] [2023-01-28 08:13:10,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:13:10,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:13:10,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:13:10,057 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:13:10,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 08:13:10,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:13:10,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:13:10,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 08:13:10,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:13:10,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:13:10,308 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:13:10,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:13:10,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:13:10,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:13:10,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:13:10,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:13:10,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:13:10,480 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:13:10,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:13:10,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:13:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:13:10,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:13:10,620 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_548 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_548) |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset| (- 24))) 0))) (forall ((v_ArrVal_548 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_79| Int)) (let ((.cse0 (* |v_t_funThread2of2ForFork0_~i~0#1_79| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_548) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))) 0)) (= (select (select |c_#memory_int| |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset|)) 0))))) is different from false [2023-01-28 08:13:10,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:13:10,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-01-28 08:13:10,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:13:10,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-01-28 08:13:10,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 08:13:10,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:13:10,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-01-28 08:13:10,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2023-01-28 08:13:24,720 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_545 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_79| Int) (|~#a~0.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_545) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_79| 28) |~#a~0.offset|)) 0)) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) is different from false [2023-01-28 08:13:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-01-28 08:13:27,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757608075] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:13:27,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:13:27,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-28 08:13:27,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576186573] [2023-01-28 08:13:27,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:13:27,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 08:13:27,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:13:27,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 08:13:27,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=254, Unknown=4, NotChecked=70, Total=420 [2023-01-28 08:13:27,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 489 [2023-01-28 08:13:27,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 176 transitions, 975 flow. Second operand has 21 states, 21 states have (on average 151.33333333333334) internal successors, (3178), 21 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:13:27,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:13:27,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 489 [2023-01-28 08:13:27,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:13:41,355 WARN L222 SmtUtils]: Spent 14.05s on a formula simplification. DAG size of input: 32 DAG size of output: 25 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 08:13:43,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:13:45,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:13:47,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:13:49,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:13:54,260 INFO L130 PetriNetUnfolder]: 10462/19185 cut-off events. [2023-01-28 08:13:54,260 INFO L131 PetriNetUnfolder]: For 21376/21408 co-relation queries the response was YES. [2023-01-28 08:13:54,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60378 conditions, 19185 events. 10462/19185 cut-off events. For 21376/21408 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 159517 event pairs, 1993 based on Foata normal form. 56/17424 useless extension candidates. Maximal degree in co-relation 58929. Up to 8953 conditions per place. [2023-01-28 08:13:54,357 INFO L137 encePairwiseOnDemand]: 473/489 looper letters, 295 selfloop transitions, 98 changer transitions 104/506 dead transitions. [2023-01-28 08:13:54,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 506 transitions, 3389 flow [2023-01-28 08:13:54,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 08:13:54,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 08:13:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2907 transitions. [2023-01-28 08:13:54,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3496932515337423 [2023-01-28 08:13:54,363 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2907 transitions. [2023-01-28 08:13:54,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2907 transitions. [2023-01-28 08:13:54,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:13:54,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2907 transitions. [2023-01-28 08:13:54,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 171.0) internal successors, (2907), 17 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:13:54,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:13:54,377 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:13:54,377 INFO L175 Difference]: Start difference. First operand has 129 places, 176 transitions, 975 flow. Second operand 17 states and 2907 transitions. [2023-01-28 08:13:54,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 506 transitions, 3389 flow [2023-01-28 08:13:54,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 506 transitions, 3371 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-01-28 08:13:54,517 INFO L231 Difference]: Finished difference. Result has 142 places, 214 transitions, 1497 flow [2023-01-28 08:13:54,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1497, PETRI_PLACES=142, PETRI_TRANSITIONS=214} [2023-01-28 08:13:54,517 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 74 predicate places. [2023-01-28 08:13:54,517 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 214 transitions, 1497 flow [2023-01-28 08:13:54,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 151.33333333333334) internal successors, (3178), 21 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:13:54,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:13:54,518 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:13:54,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 08:13:54,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 08:13:54,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:13:54,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:13:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1672823788, now seen corresponding path program 3 times [2023-01-28 08:13:54,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:13:54,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335707740] [2023-01-28 08:13:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:13:54,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:13:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:13:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 08:13:55,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:13:55,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335707740] [2023-01-28 08:13:55,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335707740] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:13:55,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228476830] [2023-01-28 08:13:55,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:13:55,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:13:55,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:13:55,197 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:13:55,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 08:13:55,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 08:13:55,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:13:55,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 08:13:55,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:13:55,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:13:55,438 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:13:55,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:13:55,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:13:55,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:13:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:13:55,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:13:55,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:13:55,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:13:55,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:13:55,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-01-28 08:13:55,727 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:13:55,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:13:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 08:13:55,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:13:55,885 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_636 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_81| Int) (v_ArrVal_637 (Array Int Int))) (let ((.cse0 (* |v_t_funThread2of2ForFork0_~i~0#1_81| 28))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_81| 1) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_637) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset|)) 0) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_81|) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_636) |c_~#a~0.base|) (+ .cse0 |c_~#a~0.offset| (- 24))) 0))))) is different from false [2023-01-28 08:13:56,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:13:56,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-01-28 08:13:56,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:13:56,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-01-28 08:13:56,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 08:13:56,074 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|))) (and (or (forall ((|v_t_funThread2of2ForFork0_~i~0#1_81| Int) (v_ArrVal_637 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_91| Int) (|~#a~0.offset| Int) (v_ArrVal_634 Int)) (or (< |v_t_funThread2of2ForFork0_~i~0#1_81| 1) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread1of2ForFork0_~i~0#1_91| 28) |~#a~0.offset|) v_ArrVal_634)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_637) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_81| 28) |~#a~0.offset|)) 0) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_81|))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_81| Int)) (or (< |v_t_funThread2of2ForFork0_~i~0#1_81| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_81|) (forall ((v_ArrVal_637 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_91| Int) (|~#a~0.offset| Int) (v_ArrVal_634 Int)) (or (= |v_t_funThread2of2ForFork0_~i~0#1_81| |v_t_funThread1of2ForFork0_~i~0#1_91|) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread1of2ForFork0_~i~0#1_91| 28) |~#a~0.offset|) v_ArrVal_634)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_637) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_81| 28) |~#a~0.offset|)) 0))))))) is different from false [2023-01-28 08:13:58,192 WARN L839 $PredicateComparison]: unable to prove that (and (or (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_81| Int) (v_ArrVal_637 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_91| Int) (|~#a~0.offset| Int) (v_ArrVal_630 (Array Int Int)) (v_ArrVal_634 Int)) (or (< |v_t_funThread2of2ForFork0_~i~0#1_81| 1) (= 0 (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_630))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_91| 28) |~#a~0.offset|) v_ArrVal_634))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_637) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_81| 28) |~#a~0.offset|))) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_81|)))) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_81| Int) (v_ArrVal_630 (Array Int Int))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_81| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_81|) (forall ((v_ArrVal_637 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_91| Int) (|~#a~0.offset| Int) (v_ArrVal_634 Int)) (or (= 0 (select (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_630))) (store .cse1 |c_~#a~0.base| (store (select .cse1 |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_91| 28) |~#a~0.offset|) v_ArrVal_634))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_637) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_81| 28) |~#a~0.offset|))) (= |v_t_funThread2of2ForFork0_~i~0#1_81| |v_t_funThread1of2ForFork0_~i~0#1_91|)))))) is different from false [2023-01-28 08:14:04,328 WARN L222 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 08:14:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-01-28 08:14:04,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228476830] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:14:04,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:14:04,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 21 [2023-01-28 08:14:04,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332580245] [2023-01-28 08:14:04,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:14:04,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 08:14:04,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:14:04,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 08:14:04,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=277, Unknown=4, NotChecked=114, Total=506 [2023-01-28 08:14:04,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 489 [2023-01-28 08:14:04,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 214 transitions, 1497 flow. Second operand has 23 states, 23 states have (on average 151.2173913043478) internal successors, (3478), 23 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:04,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:14:04,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 489 [2023-01-28 08:14:04,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:14:07,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 08:14:09,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 08:14:11,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 08:14:15,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 08:14:17,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:14:19,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:14:21,483 INFO L130 PetriNetUnfolder]: 11313/20926 cut-off events. [2023-01-28 08:14:21,484 INFO L131 PetriNetUnfolder]: For 38362/38396 co-relation queries the response was YES. [2023-01-28 08:14:21,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70954 conditions, 20926 events. 11313/20926 cut-off events. For 38362/38396 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 177971 event pairs, 1275 based on Foata normal form. 53/19029 useless extension candidates. Maximal degree in co-relation 69317. Up to 8950 conditions per place. [2023-01-28 08:14:21,586 INFO L137 encePairwiseOnDemand]: 471/489 looper letters, 341 selfloop transitions, 141 changer transitions 137/628 dead transitions. [2023-01-28 08:14:21,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 628 transitions, 4766 flow [2023-01-28 08:14:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 08:14:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 08:14:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3745 transitions. [2023-01-28 08:14:21,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3481130321621119 [2023-01-28 08:14:21,593 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3745 transitions. [2023-01-28 08:14:21,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3745 transitions. [2023-01-28 08:14:21,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:14:21,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3745 transitions. [2023-01-28 08:14:21,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 170.22727272727272) internal successors, (3745), 22 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:21,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:21,609 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:21,609 INFO L175 Difference]: Start difference. First operand has 142 places, 214 transitions, 1497 flow. Second operand 22 states and 3745 transitions. [2023-01-28 08:14:21,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 628 transitions, 4766 flow [2023-01-28 08:14:21,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 628 transitions, 4754 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-28 08:14:21,771 INFO L231 Difference]: Finished difference. Result has 171 places, 258 transitions, 2227 flow [2023-01-28 08:14:21,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2227, PETRI_PLACES=171, PETRI_TRANSITIONS=258} [2023-01-28 08:14:21,772 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 103 predicate places. [2023-01-28 08:14:21,772 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 258 transitions, 2227 flow [2023-01-28 08:14:21,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 151.2173913043478) internal successors, (3478), 23 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:21,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:14:21,773 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:14:21,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 08:14:21,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 08:14:21,978 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:14:21,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:14:21,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1807031897, now seen corresponding path program 1 times [2023-01-28 08:14:21,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:14:21,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478921390] [2023-01-28 08:14:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:14:21,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:14:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:14:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 08:14:22,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:14:22,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478921390] [2023-01-28 08:14:22,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478921390] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:14:22,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096610981] [2023-01-28 08:14:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:14:22,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:14:22,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:14:22,304 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:14:22,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 08:14:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:14:22,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 08:14:22,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:14:22,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:14:22,497 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:14:22,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:14:22,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:14:22,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:14:22,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:14:22,621 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:14:22,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:14:22,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:14:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 08:14:22,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:14:22,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-01-28 08:14:22,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-01-28 08:14:25,000 WARN L839 $PredicateComparison]: unable to prove that (forall ((|~#a~0.offset| Int) (|v_t_funThread1of2ForFork0_~i~0#1_93| Int) (v_ArrVal_720 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_720) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_93| 28) |~#a~0.offset|)) 0)) is different from false [2023-01-28 08:14:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-01-28 08:14:25,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096610981] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:14:25,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:14:25,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-01-28 08:14:25,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88201445] [2023-01-28 08:14:25,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:14:25,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 08:14:25,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:14:25,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 08:14:25,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=180, Unknown=2, NotChecked=28, Total=272 [2023-01-28 08:14:25,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 489 [2023-01-28 08:14:25,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 258 transitions, 2227 flow. Second operand has 17 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:25,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:14:25,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 489 [2023-01-28 08:14:25,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:14:28,587 INFO L130 PetriNetUnfolder]: 13607/25196 cut-off events. [2023-01-28 08:14:28,588 INFO L131 PetriNetUnfolder]: For 87716/87765 co-relation queries the response was YES. [2023-01-28 08:14:28,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97659 conditions, 25196 events. 13607/25196 cut-off events. For 87716/87765 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 220383 event pairs, 3940 based on Foata normal form. 53/22949 useless extension candidates. Maximal degree in co-relation 95231. Up to 13186 conditions per place. [2023-01-28 08:14:28,735 INFO L137 encePairwiseOnDemand]: 469/489 looper letters, 394 selfloop transitions, 105 changer transitions 104/612 dead transitions. [2023-01-28 08:14:28,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 612 transitions, 5453 flow [2023-01-28 08:14:28,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 08:14:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 08:14:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2630 transitions. [2023-01-28 08:14:28,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35855487389229723 [2023-01-28 08:14:28,739 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2630 transitions. [2023-01-28 08:14:28,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2630 transitions. [2023-01-28 08:14:28,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:14:28,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2630 transitions. [2023-01-28 08:14:28,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.33333333333334) internal successors, (2630), 15 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:28,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:28,748 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:28,748 INFO L175 Difference]: Start difference. First operand has 171 places, 258 transitions, 2227 flow. Second operand 15 states and 2630 transitions. [2023-01-28 08:14:28,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 612 transitions, 5453 flow [2023-01-28 08:14:29,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 612 transitions, 5159 flow, removed 53 selfloop flow, removed 9 redundant places. [2023-01-28 08:14:29,323 INFO L231 Difference]: Finished difference. Result has 185 places, 304 transitions, 2827 flow [2023-01-28 08:14:29,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2827, PETRI_PLACES=185, PETRI_TRANSITIONS=304} [2023-01-28 08:14:29,324 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 117 predicate places. [2023-01-28 08:14:29,324 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 304 transitions, 2827 flow [2023-01-28 08:14:29,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:29,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:14:29,325 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:14:29,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 08:14:29,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:14:29,530 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:14:29,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:14:29,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1405618938, now seen corresponding path program 4 times [2023-01-28 08:14:29,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:14:29,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574540989] [2023-01-28 08:14:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:14:29,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:14:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:14:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:14:29,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:14:29,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574540989] [2023-01-28 08:14:29,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574540989] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:14:29,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045506165] [2023-01-28 08:14:29,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:14:29,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:14:29,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:14:29,799 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:14:29,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 08:14:29,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:14:29,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:14:29,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 08:14:29,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:14:29,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:14:30,002 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:14:30,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:14:30,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:14:30,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:14:30,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:14:30,168 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:14:30,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:14:30,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:14:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:14:30,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:14:30,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-01-28 08:14:30,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-01-28 08:14:36,446 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_803 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_85| Int) (|~#a~0.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_803) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_85| 28) |~#a~0.offset|)) 0)) is different from false [2023-01-28 08:14:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-01-28 08:14:36,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045506165] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:14:36,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:14:36,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-01-28 08:14:36,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224378796] [2023-01-28 08:14:36,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:14:36,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 08:14:36,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:14:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 08:14:36,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=171, Unknown=3, NotChecked=28, Total=272 [2023-01-28 08:14:36,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 489 [2023-01-28 08:14:36,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 304 transitions, 2827 flow. Second operand has 17 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:36,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:14:36,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 489 [2023-01-28 08:14:36,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:14:40,687 INFO L130 PetriNetUnfolder]: 15226/28389 cut-off events. [2023-01-28 08:14:40,688 INFO L131 PetriNetUnfolder]: For 136912/136988 co-relation queries the response was YES. [2023-01-28 08:14:40,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117985 conditions, 28389 events. 15226/28389 cut-off events. For 136912/136988 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 254256 event pairs, 3954 based on Foata normal form. 57/25867 useless extension candidates. Maximal degree in co-relation 115444. Up to 15868 conditions per place. [2023-01-28 08:14:40,887 INFO L137 encePairwiseOnDemand]: 472/489 looper letters, 378 selfloop transitions, 102 changer transitions 139/628 dead transitions. [2023-01-28 08:14:40,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 628 transitions, 6317 flow [2023-01-28 08:14:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 08:14:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 08:14:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2284 transitions. [2023-01-28 08:14:40,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3592889727859053 [2023-01-28 08:14:40,890 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2284 transitions. [2023-01-28 08:14:40,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2284 transitions. [2023-01-28 08:14:40,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:14:40,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2284 transitions. [2023-01-28 08:14:40,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 175.69230769230768) internal successors, (2284), 13 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:40,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:40,896 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:40,896 INFO L175 Difference]: Start difference. First operand has 185 places, 304 transitions, 2827 flow. Second operand 13 states and 2284 transitions. [2023-01-28 08:14:40,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 628 transitions, 6317 flow [2023-01-28 08:14:41,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 628 transitions, 6216 flow, removed 41 selfloop flow, removed 2 redundant places. [2023-01-28 08:14:41,700 INFO L231 Difference]: Finished difference. Result has 201 places, 321 transitions, 3295 flow [2023-01-28 08:14:41,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3295, PETRI_PLACES=201, PETRI_TRANSITIONS=321} [2023-01-28 08:14:41,700 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 133 predicate places. [2023-01-28 08:14:41,700 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 321 transitions, 3295 flow [2023-01-28 08:14:41,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:41,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:14:41,701 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:14:41,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 08:14:41,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:14:41,907 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:14:41,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:14:41,908 INFO L85 PathProgramCache]: Analyzing trace with hash -59824183, now seen corresponding path program 2 times [2023-01-28 08:14:41,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:14:41,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39134346] [2023-01-28 08:14:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:14:41,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:14:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:14:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:14:42,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:14:42,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39134346] [2023-01-28 08:14:42,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39134346] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:14:42,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810575330] [2023-01-28 08:14:42,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:14:42,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:14:42,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:14:42,249 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:14:42,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 08:14:42,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:14:42,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:14:42,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 08:14:42,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:14:42,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:14:42,580 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:14:42,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:14:42,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:14:42,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:14:42,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:14:42,691 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:14:42,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:14:42,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:14:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:14:42,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:14:42,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-01-28 08:14:42,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-01-28 08:14:46,900 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_888 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_888) |c_~#a~0.base|))) is different from false [2023-01-28 08:14:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-01-28 08:14:46,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810575330] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:14:46,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:14:46,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-01-28 08:14:46,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750069347] [2023-01-28 08:14:46,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:14:46,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 08:14:46,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:14:46,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 08:14:46,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=179, Unknown=1, NotChecked=28, Total=272 [2023-01-28 08:14:46,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 489 [2023-01-28 08:14:46,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 321 transitions, 3295 flow. Second operand has 17 states, 17 states have (on average 152.8235294117647) internal successors, (2598), 17 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:46,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:14:46,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 489 [2023-01-28 08:14:46,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:14:50,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:14:54,632 INFO L130 PetriNetUnfolder]: 17027/32170 cut-off events. [2023-01-28 08:14:54,632 INFO L131 PetriNetUnfolder]: For 182999/183097 co-relation queries the response was YES. [2023-01-28 08:14:55,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137804 conditions, 32170 events. 17027/32170 cut-off events. For 182999/183097 co-relation queries the response was YES. Maximal size of possible extension queue 1349. Compared 298207 event pairs, 4291 based on Foata normal form. 106/29467 useless extension candidates. Maximal degree in co-relation 135535. Up to 16449 conditions per place. [2023-01-28 08:14:55,122 INFO L137 encePairwiseOnDemand]: 469/489 looper letters, 454 selfloop transitions, 115 changer transitions 114/692 dead transitions. [2023-01-28 08:14:55,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 692 transitions, 6979 flow [2023-01-28 08:14:55,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 08:14:55,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 08:14:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2986 transitions. [2023-01-28 08:14:55,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3591964393119211 [2023-01-28 08:14:55,127 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2986 transitions. [2023-01-28 08:14:55,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2986 transitions. [2023-01-28 08:14:55,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:14:55,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2986 transitions. [2023-01-28 08:14:55,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 175.64705882352942) internal successors, (2986), 17 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:55,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:55,139 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:55,139 INFO L175 Difference]: Start difference. First operand has 201 places, 321 transitions, 3295 flow. Second operand 17 states and 2986 transitions. [2023-01-28 08:14:55,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 692 transitions, 6979 flow [2023-01-28 08:14:56,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 692 transitions, 6729 flow, removed 73 selfloop flow, removed 6 redundant places. [2023-01-28 08:14:56,142 INFO L231 Difference]: Finished difference. Result has 216 places, 343 transitions, 3865 flow [2023-01-28 08:14:56,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3865, PETRI_PLACES=216, PETRI_TRANSITIONS=343} [2023-01-28 08:14:56,143 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 148 predicate places. [2023-01-28 08:14:56,143 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 343 transitions, 3865 flow [2023-01-28 08:14:56,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 152.8235294117647) internal successors, (2598), 17 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:14:56,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:14:56,143 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:14:56,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 08:14:56,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:14:56,344 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:14:56,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:14:56,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1333605401, now seen corresponding path program 3 times [2023-01-28 08:14:56,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:14:56,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581801939] [2023-01-28 08:14:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:14:56,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:14:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:14:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:14:56,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:14:56,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581801939] [2023-01-28 08:14:56,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581801939] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:14:56,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043463877] [2023-01-28 08:14:56,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 08:14:56,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:14:56,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:14:56,773 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:14:56,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 08:14:56,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 08:14:56,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:14:56,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 08:14:56,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:14:56,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:14:57,035 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:14:57,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:14:57,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:14:57,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:14:57,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:14:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:14:57,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:14:57,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:14:57,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:14:57,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:14:57,490 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:14:57,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:14:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:14:57,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:14:57,631 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_~i~0#1_99| Int) (v_ArrVal_979 (Array Int Int)) (v_ArrVal_978 Int)) (let ((.cse0 (* |v_t_funThread1of2ForFork0_~i~0#1_99| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_979) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0)) (= (select (store (select |c_#memory_int| |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28)) v_ArrVal_978) (+ |c_~#a~0.offset| .cse0)) 0)))) is different from false [2023-01-28 08:14:57,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:14:57,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-01-28 08:14:57,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:14:57,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-01-28 08:14:57,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 08:15:09,992 WARN L839 $PredicateComparison]: unable to prove that (and (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_89| Int) (v_ArrVal_973 (Array Int Int))) (or (< |v_t_funThread2of2ForFork0_~i~0#1_89| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_89|) (forall ((|v_t_funThread1of2ForFork0_~i~0#1_99| Int) (|~#a~0.offset| Int) (v_ArrVal_978 Int)) (or (= |v_t_funThread2of2ForFork0_~i~0#1_89| |v_t_funThread1of2ForFork0_~i~0#1_99|) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_973) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_89| 28) |~#a~0.offset|) v_ArrVal_978) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_99| 28) |~#a~0.offset|)) 0)))))) is different from false [2023-01-28 08:15:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-01-28 08:15:13,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043463877] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:15:13,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:15:13,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-01-28 08:15:13,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284245920] [2023-01-28 08:15:13,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:15:13,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 08:15:13,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:15:13,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 08:15:13,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=255, Unknown=4, NotChecked=74, Total=462 [2023-01-28 08:15:13,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 489 [2023-01-28 08:15:13,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 343 transitions, 3865 flow. Second operand has 22 states, 22 states have (on average 151.3181818181818) internal successors, (3329), 22 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:13,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:15:13,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 489 [2023-01-28 08:15:13,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:15:19,106 INFO L130 PetriNetUnfolder]: 17223/32747 cut-off events. [2023-01-28 08:15:19,106 INFO L131 PetriNetUnfolder]: For 196940/197195 co-relation queries the response was YES. [2023-01-28 08:15:19,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141946 conditions, 32747 events. 17223/32747 cut-off events. For 196940/197195 co-relation queries the response was YES. Maximal size of possible extension queue 1448. Compared 306895 event pairs, 3502 based on Foata normal form. 13/29922 useless extension candidates. Maximal degree in co-relation 139693. Up to 18203 conditions per place. [2023-01-28 08:15:19,488 INFO L137 encePairwiseOnDemand]: 473/489 looper letters, 392 selfloop transitions, 160 changer transitions 86/647 dead transitions. [2023-01-28 08:15:19,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 647 transitions, 7276 flow [2023-01-28 08:15:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 08:15:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 08:15:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2128 transitions. [2023-01-28 08:15:19,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36264485344239944 [2023-01-28 08:15:19,491 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2128 transitions. [2023-01-28 08:15:19,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2128 transitions. [2023-01-28 08:15:19,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:15:19,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2128 transitions. [2023-01-28 08:15:19,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 177.33333333333334) internal successors, (2128), 12 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:19,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:19,498 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:19,498 INFO L175 Difference]: Start difference. First operand has 216 places, 343 transitions, 3865 flow. Second operand 12 states and 2128 transitions. [2023-01-28 08:15:19,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 647 transitions, 7276 flow [2023-01-28 08:15:21,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 647 transitions, 6781 flow, removed 176 selfloop flow, removed 7 redundant places. [2023-01-28 08:15:21,096 INFO L231 Difference]: Finished difference. Result has 220 places, 378 transitions, 4453 flow [2023-01-28 08:15:21,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3495, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4453, PETRI_PLACES=220, PETRI_TRANSITIONS=378} [2023-01-28 08:15:21,097 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 152 predicate places. [2023-01-28 08:15:21,097 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 378 transitions, 4453 flow [2023-01-28 08:15:21,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 151.3181818181818) internal successors, (3329), 22 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:21,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:15:21,097 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:15:21,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 08:15:21,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:15:21,298 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:15:21,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:15:21,298 INFO L85 PathProgramCache]: Analyzing trace with hash -433034171, now seen corresponding path program 1 times [2023-01-28 08:15:21,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:15:21,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510837204] [2023-01-28 08:15:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:15:21,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:15:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:15:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 08:15:21,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:15:21,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510837204] [2023-01-28 08:15:21,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510837204] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:15:21,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193388344] [2023-01-28 08:15:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:15:21,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:15:21,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:15:21,355 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:15:21,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 08:15:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:15:21,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 08:15:21,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:15:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 08:15:21,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:15:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 08:15:21,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193388344] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:15:21,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:15:21,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-01-28 08:15:21,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412208621] [2023-01-28 08:15:21,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:15:21,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 08:15:21,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:15:21,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 08:15:21,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-01-28 08:15:21,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 489 [2023-01-28 08:15:21,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 378 transitions, 4453 flow. Second operand has 9 states, 9 states have (on average 216.33333333333334) internal successors, (1947), 9 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:21,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:15:21,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 489 [2023-01-28 08:15:21,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:15:22,472 INFO L130 PetriNetUnfolder]: 2551/5346 cut-off events. [2023-01-28 08:15:22,473 INFO L131 PetriNetUnfolder]: For 49099/49119 co-relation queries the response was YES. [2023-01-28 08:15:22,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27004 conditions, 5346 events. 2551/5346 cut-off events. For 49099/49119 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 43241 event pairs, 302 based on Foata normal form. 745/5776 useless extension candidates. Maximal degree in co-relation 26720. Up to 3666 conditions per place. [2023-01-28 08:15:22,502 INFO L137 encePairwiseOnDemand]: 486/489 looper letters, 190 selfloop transitions, 3 changer transitions 222/422 dead transitions. [2023-01-28 08:15:22,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 422 transitions, 5614 flow [2023-01-28 08:15:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 08:15:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 08:15:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1153 transitions. [2023-01-28 08:15:22,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47157464212678935 [2023-01-28 08:15:22,504 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1153 transitions. [2023-01-28 08:15:22,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1153 transitions. [2023-01-28 08:15:22,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:15:22,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1153 transitions. [2023-01-28 08:15:22,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 230.6) internal successors, (1153), 5 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:22,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 489.0) internal successors, (2934), 6 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:22,507 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 489.0) internal successors, (2934), 6 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:22,507 INFO L175 Difference]: Start difference. First operand has 220 places, 378 transitions, 4453 flow. Second operand 5 states and 1153 transitions. [2023-01-28 08:15:22,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 422 transitions, 5614 flow [2023-01-28 08:15:22,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 422 transitions, 5248 flow, removed 132 selfloop flow, removed 18 redundant places. [2023-01-28 08:15:22,652 INFO L231 Difference]: Finished difference. Result has 171 places, 120 transitions, 1042 flow [2023-01-28 08:15:22,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1042, PETRI_PLACES=171, PETRI_TRANSITIONS=120} [2023-01-28 08:15:22,653 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 103 predicate places. [2023-01-28 08:15:22,653 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 120 transitions, 1042 flow [2023-01-28 08:15:22,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 216.33333333333334) internal successors, (1947), 9 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:22,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:15:22,653 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:15:22,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 08:15:22,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:15:22,854 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:15:22,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:15:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash 214824484, now seen corresponding path program 5 times [2023-01-28 08:15:22,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:15:22,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174525558] [2023-01-28 08:15:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:15:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:15:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:15:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 08:15:23,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:15:23,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174525558] [2023-01-28 08:15:23,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174525558] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:15:23,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708755580] [2023-01-28 08:15:23,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:15:23,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:15:23,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:15:23,281 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:15:23,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 08:15:23,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-01-28 08:15:23,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:15:23,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 08:15:23,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:15:23,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:15:23,694 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:15:23,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:15:23,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:15:23,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:15:23,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:15:23,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:15:23,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:15:23,891 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:15:23,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:15:23,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:15:24,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-01-28 08:15:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 08:15:24,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:15:24,067 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1148 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1148) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28))) 0)) is different from false [2023-01-28 08:15:24,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:15:24,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-01-28 08:15:24,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:15:24,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-01-28 08:15:24,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 08:15:24,351 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_t_funThread1of2ForFork0_~i~0#1_103| Int)) (or (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_103|) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_92| Int) (v_ArrVal_1148 (Array Int Int)) (v_ArrVal_1145 (Array Int Int)) (|~#a~0.offset| Int) (v_ArrVal_1146 Int)) (or (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1145))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_103| 28) |~#a~0.offset|) v_ArrVal_1146))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1148) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_92| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_103| |v_t_funThread2of2ForFork0_~i~0#1_92|))) (< |v_t_funThread1of2ForFork0_~i~0#1_103| 1))) (or (forall ((|v_t_funThread1of2ForFork0_~i~0#1_103| Int) (|v_t_funThread2of2ForFork0_~i~0#1_92| Int) (v_ArrVal_1148 (Array Int Int)) (v_ArrVal_1145 (Array Int Int)) (|~#a~0.offset| Int) (v_ArrVal_1146 Int)) (or (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_103|) (= (select (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1145))) (store .cse1 |c_~#a~0.base| (store (select .cse1 |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_103| 28) |~#a~0.offset|) v_ArrVal_1146))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1148) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_92| 28) |~#a~0.offset|)) 0) (< |v_t_funThread1of2ForFork0_~i~0#1_103| 1))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)))) is different from false [2023-01-28 08:15:32,502 WARN L222 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 08:15:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 6 not checked. [2023-01-28 08:15:32,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708755580] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:15:32,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:15:32,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 22 [2023-01-28 08:15:32,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471853757] [2023-01-28 08:15:32,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:15:32,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 08:15:32,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:15:32,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 08:15:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=354, Unknown=5, NotChecked=82, Total=552 [2023-01-28 08:15:32,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 489 [2023-01-28 08:15:32,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 120 transitions, 1042 flow. Second operand has 24 states, 24 states have (on average 149.45833333333334) internal successors, (3587), 24 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:32,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:15:32,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 489 [2023-01-28 08:15:32,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:15:33,053 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|))) (and (forall ((|v_t_funThread2of2ForFork0_~i~0#1_92| Int) (v_ArrVal_1148 (Array Int Int)) (v_ArrVal_1146 Int)) (let ((.cse1 (* |v_t_funThread2of2ForFork0_~i~0#1_92| 28))) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) .cse0 v_ArrVal_1146)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1148) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse1)) 0) (not (= (select (select |c_#pthreadsMutex| |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse1 (- 24))) 0))))) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_92| Int) (v_ArrVal_1148 (Array Int Int)) (v_ArrVal_1145 (Array Int Int)) (v_ArrVal_1146 Int) (v_ArrVal_1144 (Array Int Int))) (let ((.cse3 (* |v_t_funThread2of2ForFork0_~i~0#1_92| 28))) (or (= (select (select (store (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1145))) (store .cse2 |c_~#a~0.base| (store (select .cse2 |c_~#a~0.base|) .cse0 v_ArrVal_1146))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1148) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse3)) 0) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1144) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse3 (- 24))) 0))))))) is different from false [2023-01-28 08:15:33,377 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|)) (.cse1 (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|))) (and (forall ((v_ArrVal_1148 (Array Int Int)) (v_ArrVal_1146 Int)) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 .cse1 v_ArrVal_1146)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1148) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28))) 0)) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_92| Int) (v_ArrVal_1148 (Array Int Int)) (v_ArrVal_1146 Int)) (let ((.cse2 (* |v_t_funThread2of2ForFork0_~i~0#1_92| 28))) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 .cse1 v_ArrVal_1146)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1148) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse2)) 0) (not (= (select (select |c_#pthreadsMutex| |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse2 (- 24))) 0))))))) is different from false [2023-01-28 08:15:35,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 08:15:37,500 INFO L130 PetriNetUnfolder]: 1498/3203 cut-off events. [2023-01-28 08:15:37,501 INFO L131 PetriNetUnfolder]: For 22394/22418 co-relation queries the response was YES. [2023-01-28 08:15:37,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13556 conditions, 3203 events. 1498/3203 cut-off events. For 22394/22418 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24478 event pairs, 255 based on Foata normal form. 4/2895 useless extension candidates. Maximal degree in co-relation 13431. Up to 1733 conditions per place. [2023-01-28 08:15:37,516 INFO L137 encePairwiseOnDemand]: 470/489 looper letters, 141 selfloop transitions, 44 changer transitions 101/292 dead transitions. [2023-01-28 08:15:37,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 292 transitions, 2690 flow [2023-01-28 08:15:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 08:15:37,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 08:15:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4016 transitions. [2023-01-28 08:15:37,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3158722667925122 [2023-01-28 08:15:37,520 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4016 transitions. [2023-01-28 08:15:37,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4016 transitions. [2023-01-28 08:15:37,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:15:37,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4016 transitions. [2023-01-28 08:15:37,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 154.46153846153845) internal successors, (4016), 26 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:37,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:37,534 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:37,534 INFO L175 Difference]: Start difference. First operand has 171 places, 120 transitions, 1042 flow. Second operand 26 states and 4016 transitions. [2023-01-28 08:15:37,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 292 transitions, 2690 flow [2023-01-28 08:15:37,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 292 transitions, 2411 flow, removed 45 selfloop flow, removed 27 redundant places. [2023-01-28 08:15:37,601 INFO L231 Difference]: Finished difference. Result has 168 places, 145 transitions, 1268 flow [2023-01-28 08:15:37,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1268, PETRI_PLACES=168, PETRI_TRANSITIONS=145} [2023-01-28 08:15:37,601 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 100 predicate places. [2023-01-28 08:15:37,601 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 145 transitions, 1268 flow [2023-01-28 08:15:37,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 149.45833333333334) internal successors, (3587), 24 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:37,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:15:37,602 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:15:37,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 08:15:37,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:15:37,808 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:15:37,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:15:37,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1967049427, now seen corresponding path program 4 times [2023-01-28 08:15:37,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:15:37,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307747857] [2023-01-28 08:15:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:15:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:15:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:15:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-01-28 08:15:38,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:15:38,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307747857] [2023-01-28 08:15:38,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307747857] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:15:38,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339038721] [2023-01-28 08:15:38,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 08:15:38,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:15:38,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:15:38,102 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:15:38,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 08:15:38,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 08:15:38,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:15:38,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 08:15:38,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:15:38,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:15:38,277 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:15:38,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:15:38,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:15:38,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:15:38,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:15:38,386 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:15:38,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:15:38,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:15:38,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-01-28 08:15:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-01-28 08:15:38,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:15:38,538 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1238 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1238) |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|)) 0)) is different from false [2023-01-28 08:15:38,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-01-28 08:15:38,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-01-28 08:15:38,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-01-28 08:15:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 2 not checked. [2023-01-28 08:15:39,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339038721] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:15:39,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:15:39,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-01-28 08:15:39,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055845833] [2023-01-28 08:15:39,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:15:39,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 08:15:39,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:15:39,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 08:15:39,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=149, Unknown=1, NotChecked=26, Total=240 [2023-01-28 08:15:39,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 489 [2023-01-28 08:15:39,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 145 transitions, 1268 flow. Second operand has 16 states, 16 states have (on average 152.75) internal successors, (2444), 16 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:39,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:15:39,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 489 [2023-01-28 08:15:39,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:15:40,327 INFO L130 PetriNetUnfolder]: 1302/2774 cut-off events. [2023-01-28 08:15:40,327 INFO L131 PetriNetUnfolder]: For 21401/21419 co-relation queries the response was YES. [2023-01-28 08:15:40,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14172 conditions, 2774 events. 1302/2774 cut-off events. For 21401/21419 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20550 event pairs, 322 based on Foata normal form. 4/2644 useless extension candidates. Maximal degree in co-relation 13853. Up to 1854 conditions per place. [2023-01-28 08:15:40,343 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 138 selfloop transitions, 8 changer transitions 45/197 dead transitions. [2023-01-28 08:15:40,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 197 transitions, 1991 flow [2023-01-28 08:15:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 08:15:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 08:15:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1445 transitions. [2023-01-28 08:15:40,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32833446943876393 [2023-01-28 08:15:40,345 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1445 transitions. [2023-01-28 08:15:40,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1445 transitions. [2023-01-28 08:15:40,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:15:40,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1445 transitions. [2023-01-28 08:15:40,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.55555555555554) internal successors, (1445), 9 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:40,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:40,351 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:40,351 INFO L175 Difference]: Start difference. First operand has 168 places, 145 transitions, 1268 flow. Second operand 9 states and 1445 transitions. [2023-01-28 08:15:40,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 197 transitions, 1991 flow [2023-01-28 08:15:40,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 197 transitions, 1871 flow, removed 52 selfloop flow, removed 10 redundant places. [2023-01-28 08:15:40,403 INFO L231 Difference]: Finished difference. Result has 156 places, 139 transitions, 1147 flow [2023-01-28 08:15:40,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1147, PETRI_PLACES=156, PETRI_TRANSITIONS=139} [2023-01-28 08:15:40,404 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 88 predicate places. [2023-01-28 08:15:40,404 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 139 transitions, 1147 flow [2023-01-28 08:15:40,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 152.75) internal successors, (2444), 16 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:40,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:15:40,404 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:15:40,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-01-28 08:15:40,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-01-28 08:15:40,610 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:15:40,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:15:40,611 INFO L85 PathProgramCache]: Analyzing trace with hash -128099310, now seen corresponding path program 6 times [2023-01-28 08:15:40,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:15:40,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158367188] [2023-01-28 08:15:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:15:40,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:15:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:15:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-01-28 08:15:40,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:15:40,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158367188] [2023-01-28 08:15:40,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158367188] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:15:40,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018048404] [2023-01-28 08:15:40,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:15:40,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:15:40,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:15:40,969 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:15:41,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 08:15:41,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-28 08:15:41,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:15:41,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 08:15:41,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:15:41,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:15:41,272 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:15:41,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:15:41,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:15:41,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:15:41,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:15:41,367 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:15:41,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:15:41,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:15:41,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-01-28 08:15:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-01-28 08:15:41,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:15:41,568 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1328 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1328) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread2of2ForFork0_~i~0#1| 28))) 0)) is different from false [2023-01-28 08:15:41,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-01-28 08:15:41,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-01-28 08:15:43,699 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1328 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_107| Int) (|v_t_funThread2of2ForFork0_~i~0#1_96| Int) (|~#a~0.offset| Int) (v_ArrVal_1327 Int)) (or (= |v_t_funThread1of2ForFork0_~i~0#1_107| |v_t_funThread2of2ForFork0_~i~0#1_96|) (< |v_t_funThread1of2ForFork0_~i~0#1_107| 1) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_107| 28) |~#a~0.offset|) v_ArrVal_1327)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1328) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_96| 28) |~#a~0.offset|)) 0) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_107|))) is different from false [2023-01-28 08:15:45,747 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1328 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_107| Int) (v_ArrVal_1323 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_96| Int) (|~#a~0.offset| Int) (v_ArrVal_1327 Int)) (or (= |v_t_funThread1of2ForFork0_~i~0#1_107| |v_t_funThread2of2ForFork0_~i~0#1_96|) (< |v_t_funThread1of2ForFork0_~i~0#1_107| 1) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1323))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_107| 28) |~#a~0.offset|) v_ArrVal_1327))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1328) |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_96| 28) |~#a~0.offset|)) 0) (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_107|))) is different from false [2023-01-28 08:15:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-01-28 08:15:46,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018048404] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:15:46,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:15:46,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 17 [2023-01-28 08:15:46,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026464269] [2023-01-28 08:15:46,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:15:46,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:15:46,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:15:46,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:15:46,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=172, Unknown=5, NotChecked=90, Total=342 [2023-01-28 08:15:46,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 489 [2023-01-28 08:15:46,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 139 transitions, 1147 flow. Second operand has 19 states, 19 states have (on average 152.68421052631578) internal successors, (2901), 19 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:15:46,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:15:46,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 489 [2023-01-28 08:15:46,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:16:06,139 WARN L222 SmtUtils]: Spent 20.10s on a formula simplification. DAG size of input: 41 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 08:16:08,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:10,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:12,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:14,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:16,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:19,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:21,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:23,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:25,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:27,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:29,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:31,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:33,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:35,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:37,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:39,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:41,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:43,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:45,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:47,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:49,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:51,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:53,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:55,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:16:57,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:17:00,600 INFO L130 PetriNetUnfolder]: 1098/2380 cut-off events. [2023-01-28 08:17:00,600 INFO L131 PetriNetUnfolder]: For 16682/16700 co-relation queries the response was YES. [2023-01-28 08:17:00,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11801 conditions, 2380 events. 1098/2380 cut-off events. For 16682/16700 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17282 event pairs, 314 based on Foata normal form. 4/2296 useless extension candidates. Maximal degree in co-relation 11563. Up to 1610 conditions per place. [2023-01-28 08:17:00,613 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 123 selfloop transitions, 9 changer transitions 52/190 dead transitions. [2023-01-28 08:17:00,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 190 transitions, 1873 flow [2023-01-28 08:17:00,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 08:17:00,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 08:17:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1595 transitions. [2023-01-28 08:17:00,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3261758691206544 [2023-01-28 08:17:00,617 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1595 transitions. [2023-01-28 08:17:00,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1595 transitions. [2023-01-28 08:17:00,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:17:00,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1595 transitions. [2023-01-28 08:17:00,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 159.5) internal successors, (1595), 10 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:00,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:00,622 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:00,622 INFO L175 Difference]: Start difference. First operand has 156 places, 139 transitions, 1147 flow. Second operand 10 states and 1595 transitions. [2023-01-28 08:17:00,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 190 transitions, 1873 flow [2023-01-28 08:17:00,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 190 transitions, 1818 flow, removed 10 selfloop flow, removed 12 redundant places. [2023-01-28 08:17:00,643 INFO L231 Difference]: Finished difference. Result has 149 places, 127 transitions, 997 flow [2023-01-28 08:17:00,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=997, PETRI_PLACES=149, PETRI_TRANSITIONS=127} [2023-01-28 08:17:00,644 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 81 predicate places. [2023-01-28 08:17:00,644 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 127 transitions, 997 flow [2023-01-28 08:17:00,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 152.68421052631578) internal successors, (2901), 19 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:00,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:17:00,644 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:17:00,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 08:17:00,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 08:17:00,845 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:17:00,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:17:00,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1687228525, now seen corresponding path program 5 times [2023-01-28 08:17:00,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:17:00,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740028990] [2023-01-28 08:17:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:17:00,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:17:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:17:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-01-28 08:17:01,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:17:01,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740028990] [2023-01-28 08:17:01,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740028990] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:17:01,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318588521] [2023-01-28 08:17:01,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 08:17:01,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:17:01,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:17:01,197 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:17:01,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 08:17:01,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-01-28 08:17:01,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:17:01,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 08:17:01,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:17:01,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:17:01,646 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:17:01,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:17:01,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:17:01,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:17:01,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:17:01,753 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:17:01,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:17:01,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:17:01,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-01-28 08:17:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-01-28 08:17:01,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:17:01,900 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1418 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1418) |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|)) 0)) is different from false [2023-01-28 08:17:01,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-01-28 08:17:01,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-01-28 08:17:04,009 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread2of2ForFork0_~i~0#1_98| Int) (|~#a~0.offset| Int) (|v_t_funThread1of2ForFork0_~i~0#1_109| Int) (v_ArrVal_1417 Int) (v_ArrVal_1418 (Array Int Int))) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_98| 28) |~#a~0.offset|) v_ArrVal_1417)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1418) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_109| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_109| |v_t_funThread2of2ForFork0_~i~0#1_98|) (< |v_t_funThread2of2ForFork0_~i~0#1_98| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_98|))) is different from false [2023-01-28 08:17:06,064 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1413 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_98| Int) (|~#a~0.offset| Int) (|v_t_funThread1of2ForFork0_~i~0#1_109| Int) (v_ArrVal_1417 Int) (v_ArrVal_1418 (Array Int Int))) (or (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1413))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_98| 28) |~#a~0.offset|) v_ArrVal_1417))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1418) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_109| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_109| |v_t_funThread2of2ForFork0_~i~0#1_98|) (< |v_t_funThread2of2ForFork0_~i~0#1_98| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_98|))) is different from false [2023-01-28 08:17:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-01-28 08:17:06,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318588521] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:17:06,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:17:06,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 17 [2023-01-28 08:17:06,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824227285] [2023-01-28 08:17:06,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:17:06,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 08:17:06,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:17:06,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 08:17:06,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=174, Unknown=4, NotChecked=90, Total=342 [2023-01-28 08:17:06,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 489 [2023-01-28 08:17:06,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 127 transitions, 997 flow. Second operand has 19 states, 19 states have (on average 152.78947368421052) internal successors, (2903), 19 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:06,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:17:06,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 489 [2023-01-28 08:17:06,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:17:07,144 INFO L130 PetriNetUnfolder]: 983/2176 cut-off events. [2023-01-28 08:17:07,145 INFO L131 PetriNetUnfolder]: For 14151/14165 co-relation queries the response was YES. [2023-01-28 08:17:07,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10331 conditions, 2176 events. 983/2176 cut-off events. For 14151/14165 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15723 event pairs, 301 based on Foata normal form. 8/2081 useless extension candidates. Maximal degree in co-relation 10253. Up to 1238 conditions per place. [2023-01-28 08:17:07,155 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 107 selfloop transitions, 7 changer transitions 67/187 dead transitions. [2023-01-28 08:17:07,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 187 transitions, 1694 flow [2023-01-28 08:17:07,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 08:17:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 08:17:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1908 transitions. [2023-01-28 08:17:07,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32515337423312884 [2023-01-28 08:17:07,157 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1908 transitions. [2023-01-28 08:17:07,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1908 transitions. [2023-01-28 08:17:07,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:17:07,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1908 transitions. [2023-01-28 08:17:07,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:07,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:07,162 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:07,162 INFO L175 Difference]: Start difference. First operand has 149 places, 127 transitions, 997 flow. Second operand 12 states and 1908 transitions. [2023-01-28 08:17:07,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 187 transitions, 1694 flow [2023-01-28 08:17:07,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 187 transitions, 1646 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-01-28 08:17:07,184 INFO L231 Difference]: Finished difference. Result has 148 places, 115 transitions, 884 flow [2023-01-28 08:17:07,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=884, PETRI_PLACES=148, PETRI_TRANSITIONS=115} [2023-01-28 08:17:07,184 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 80 predicate places. [2023-01-28 08:17:07,185 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 115 transitions, 884 flow [2023-01-28 08:17:07,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 152.78947368421052) internal successors, (2903), 19 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:07,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:17:07,185 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:17:07,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 08:17:07,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 08:17:07,386 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:17:07,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:17:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1933872669, now seen corresponding path program 6 times [2023-01-28 08:17:07,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:17:07,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768445498] [2023-01-28 08:17:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:17:07,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:17:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:17:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-01-28 08:17:07,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:17:07,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768445498] [2023-01-28 08:17:07,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768445498] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:17:07,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967489444] [2023-01-28 08:17:07,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 08:17:07,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:17:07,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:17:07,830 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:17:07,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 08:17:08,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-28 08:17:08,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:17:08,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-28 08:17:08,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:17:08,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:17:08,173 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:17:08,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:17:08,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:17:08,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:17:08,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:17:08,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:17:08,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:17:08,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:17:08,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:17:08,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:17:08,425 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:17:08,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:17:08,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-01-28 08:17:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-01-28 08:17:08,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:17:10,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:17:10,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-01-28 08:17:10,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:17:10,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-01-28 08:17:10,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 08:17:12,734 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|))) (and (forall ((|v_t_funThread2of2ForFork0_~i~0#1_100| Int)) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_100|) (< |v_t_funThread2of2ForFork0_~i~0#1_100| 1) (forall ((v_ArrVal_1507 Int) (|v_t_funThread1of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1510 (Array Int Int)) (|~#a~0.offset| Int)) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread2of2ForFork0_~i~0#1_100| 28) |~#a~0.offset|) v_ArrVal_1507)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1510) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_111| |v_t_funThread2of2ForFork0_~i~0#1_100|))))) (or (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((v_ArrVal_1507 Int) (|v_t_funThread2of2ForFork0_~i~0#1_100| Int) (|v_t_funThread1of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1510 (Array Int Int)) (|~#a~0.offset| Int)) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_100|) (< |v_t_funThread2of2ForFork0_~i~0#1_100| 1) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 (+ (* |v_t_funThread2of2ForFork0_~i~0#1_100| 28) |~#a~0.offset|) v_ArrVal_1507)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1510) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0)))))) is different from false [2023-01-28 08:17:14,831 WARN L839 $PredicateComparison]: unable to prove that (and (or (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((v_ArrVal_1507 Int) (|v_t_funThread2of2ForFork0_~i~0#1_100| Int) (v_ArrVal_1503 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1510 (Array Int Int)) (|~#a~0.offset| Int)) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_100|) (< |v_t_funThread2of2ForFork0_~i~0#1_100| 1) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1503))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_100| 28) |~#a~0.offset|) v_ArrVal_1507))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1510) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0)))) (forall ((|v_t_funThread2of2ForFork0_~i~0#1_100| Int) (v_ArrVal_1503 (Array Int Int))) (or (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_100|) (< |v_t_funThread2of2ForFork0_~i~0#1_100| 1) (forall ((v_ArrVal_1507 Int) (|v_t_funThread1of2ForFork0_~i~0#1_111| Int) (v_ArrVal_1510 (Array Int Int)) (|~#a~0.offset| Int)) (or (= (select (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1503))) (store .cse1 |c_~#a~0.base| (store (select .cse1 |c_~#a~0.base|) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_100| 28) |~#a~0.offset|) v_ArrVal_1507))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1510) |c_~#a~0.base|) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_111| 28) |~#a~0.offset|)) 0) (= |v_t_funThread1of2ForFork0_~i~0#1_111| |v_t_funThread2of2ForFork0_~i~0#1_100|)))))) is different from false [2023-01-28 08:17:20,865 WARN L222 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 08:17:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 5 not checked. [2023-01-28 08:17:21,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967489444] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:17:21,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:17:21,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 22 [2023-01-28 08:17:21,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046980479] [2023-01-28 08:17:21,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:17:21,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 08:17:21,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:17:21,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 08:17:21,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=345, Unknown=5, NotChecked=82, Total=552 [2023-01-28 08:17:21,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 489 [2023-01-28 08:17:21,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 115 transitions, 884 flow. Second operand has 24 states, 24 states have (on average 149.29166666666666) internal successors, (3583), 24 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:21,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:17:21,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 489 [2023-01-28 08:17:21,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:17:23,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:17:24,302 INFO L130 PetriNetUnfolder]: 730/1635 cut-off events. [2023-01-28 08:17:24,303 INFO L131 PetriNetUnfolder]: For 12473/12473 co-relation queries the response was YES. [2023-01-28 08:17:24,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8175 conditions, 1635 events. 730/1635 cut-off events. For 12473/12473 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11196 event pairs, 217 based on Foata normal form. 10/1519 useless extension candidates. Maximal degree in co-relation 8102. Up to 1100 conditions per place. [2023-01-28 08:17:24,310 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 114 selfloop transitions, 16 changer transitions 28/164 dead transitions. [2023-01-28 08:17:24,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 164 transitions, 1554 flow [2023-01-28 08:17:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 08:17:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 08:17:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1854 transitions. [2023-01-28 08:17:24,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3159509202453988 [2023-01-28 08:17:24,312 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1854 transitions. [2023-01-28 08:17:24,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1854 transitions. [2023-01-28 08:17:24,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:17:24,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1854 transitions. [2023-01-28 08:17:24,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 154.5) internal successors, (1854), 12 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:24,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:24,317 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:24,317 INFO L175 Difference]: Start difference. First operand has 148 places, 115 transitions, 884 flow. Second operand 12 states and 1854 transitions. [2023-01-28 08:17:24,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 164 transitions, 1554 flow [2023-01-28 08:17:24,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 164 transitions, 1496 flow, removed 22 selfloop flow, removed 14 redundant places. [2023-01-28 08:17:24,331 INFO L231 Difference]: Finished difference. Result has 138 places, 119 transitions, 942 flow [2023-01-28 08:17:24,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=942, PETRI_PLACES=138, PETRI_TRANSITIONS=119} [2023-01-28 08:17:24,332 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 70 predicate places. [2023-01-28 08:17:24,332 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 119 transitions, 942 flow [2023-01-28 08:17:24,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 149.29166666666666) internal successors, (3583), 24 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:24,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:17:24,333 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:17:24,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 08:17:24,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:17:24,539 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:17:24,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:17:24,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2130980989, now seen corresponding path program 1 times [2023-01-28 08:17:24,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:17:24,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283039598] [2023-01-28 08:17:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:17:24,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:17:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:17:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:17:24,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:17:24,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283039598] [2023-01-28 08:17:24,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283039598] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:17:24,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254533562] [2023-01-28 08:17:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:17:24,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:17:24,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:17:24,863 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:17:24,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 08:17:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:17:24,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 08:17:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:17:25,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:17:25,046 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:17:25,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:17:25,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:17:25,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:17:25,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-01-28 08:17:25,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2023-01-28 08:17:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:17:25,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:17:45,909 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1603 (Array Int Int)) (|v_t_funThread2of2ForFork0_~i~0#1_102| Int) (|~#a~0.offset| Int) (|t_funThread1of2ForFork0_~i~0#1| Int)) (or (< |v_t_funThread2of2ForFork0_~i~0#1_102| 1) (<= 10 |v_t_funThread2of2ForFork0_~i~0#1_102|) (= (select (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1603) |c_~#a~0.base|)) (.cse1 (+ (* |t_funThread1of2ForFork0_~i~0#1| 28) |~#a~0.offset|))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ (* |v_t_funThread2of2ForFork0_~i~0#1_102| 28) |~#a~0.offset|)) 0))) is different from false [2023-01-28 08:17:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-01-28 08:17:46,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254533562] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:17:46,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:17:46,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 20 [2023-01-28 08:17:46,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703385673] [2023-01-28 08:17:46,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:17:46,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 08:17:46,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:17:46,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 08:17:46,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=323, Unknown=10, NotChecked=38, Total=462 [2023-01-28 08:17:46,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 489 [2023-01-28 08:17:46,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 119 transitions, 942 flow. Second operand has 22 states, 22 states have (on average 170.6818181818182) internal successors, (3755), 22 states have internal predecessors, (3755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:46,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:17:46,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 489 [2023-01-28 08:17:46,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:17:47,841 INFO L130 PetriNetUnfolder]: 730/1683 cut-off events. [2023-01-28 08:17:47,841 INFO L131 PetriNetUnfolder]: For 13107/13113 co-relation queries the response was YES. [2023-01-28 08:17:47,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8625 conditions, 1683 events. 730/1683 cut-off events. For 13107/13113 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11997 event pairs, 184 based on Foata normal form. 18/1560 useless extension candidates. Maximal degree in co-relation 8443. Up to 828 conditions per place. [2023-01-28 08:17:47,850 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 123 selfloop transitions, 39 changer transitions 17/186 dead transitions. [2023-01-28 08:17:47,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 186 transitions, 1865 flow [2023-01-28 08:17:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 08:17:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 08:17:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2286 transitions. [2023-01-28 08:17:47,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3596035865974516 [2023-01-28 08:17:47,852 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2286 transitions. [2023-01-28 08:17:47,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2286 transitions. [2023-01-28 08:17:47,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:17:47,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2286 transitions. [2023-01-28 08:17:47,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 175.84615384615384) internal successors, (2286), 13 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:47,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:47,857 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:47,857 INFO L175 Difference]: Start difference. First operand has 138 places, 119 transitions, 942 flow. Second operand 13 states and 2286 transitions. [2023-01-28 08:17:47,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 186 transitions, 1865 flow [2023-01-28 08:17:47,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 186 transitions, 1811 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-01-28 08:17:47,876 INFO L231 Difference]: Finished difference. Result has 145 places, 132 transitions, 1143 flow [2023-01-28 08:17:47,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1143, PETRI_PLACES=145, PETRI_TRANSITIONS=132} [2023-01-28 08:17:47,877 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 77 predicate places. [2023-01-28 08:17:47,877 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 132 transitions, 1143 flow [2023-01-28 08:17:47,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 170.6818181818182) internal successors, (3755), 22 states have internal predecessors, (3755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:17:47,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:17:47,878 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:17:47,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 08:17:48,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 08:17:48,082 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:17:48,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:17:48,082 INFO L85 PathProgramCache]: Analyzing trace with hash -226772141, now seen corresponding path program 2 times [2023-01-28 08:17:48,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:17:48,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521868396] [2023-01-28 08:17:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:17:48,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:17:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:17:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:17:48,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:17:48,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521868396] [2023-01-28 08:17:48,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521868396] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:17:48,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794486636] [2023-01-28 08:17:48,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:17:48,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:17:48,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:17:48,433 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:17:48,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 08:17:48,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:17:48,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:17:48,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 08:17:48,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:17:48,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:17:48,667 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:17:48,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:17:48,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:17:48,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-01-28 08:17:48,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2023-01-28 08:17:48,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:17:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:17:48,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:17:58,877 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread2of2ForFork0_~i~0#1| Int) (v_ArrVal_1704 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1704) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* 28 |t_funThread2of2ForFork0_~i~0#1|))) 0)) is different from false [2023-01-28 08:18:00,887 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread2of2ForFork0_~i~0#1| Int) (v_ArrVal_1704 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) (+ (- 1) |c_t_funThread1of2ForFork0_#t~post40#1|))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1704) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* 28 |t_funThread2of2ForFork0_~i~0#1|))) 0)) is different from false [2023-01-28 08:18:00,894 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread2of2ForFork0_~i~0#1| Int) (v_ArrVal_1704 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|)) (.cse1 (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|))) (store .cse0 .cse1 (+ (- 1) (select .cse0 .cse1))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1704) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* 28 |t_funThread2of2ForFork0_~i~0#1|))) 0)) is different from false [2023-01-28 08:18:00,906 WARN L839 $PredicateComparison]: unable to prove that (forall ((|t_funThread2of2ForFork0_~i~0#1| Int) (v_ArrVal_1704 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store (select |c_#memory_int| |c_~#a~0.base|) (+ (* |c_t_funThread1of2ForFork0_~i~0#1| 28) |c_~#a~0.offset|) |c_t_funThread1of2ForFork0_#t~post37#1|)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1704) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* 28 |t_funThread2of2ForFork0_~i~0#1|))) 0)) is different from false [2023-01-28 08:18:02,912 WARN L839 $PredicateComparison]: unable to prove that (forall ((|~#a~0.offset| Int) (|t_funThread2of2ForFork0_~i~0#1| Int) (|t_funThread1of2ForFork0_~i~0#1| Int) (v_ArrVal_1704 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|)) (.cse1 (+ (* |t_funThread1of2ForFork0_~i~0#1| 28) |~#a~0.offset|))) (store .cse0 .cse1 (select .cse0 .cse1)))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1704) |c_~#a~0.base|) (+ (* 28 |t_funThread2of2ForFork0_~i~0#1|) |~#a~0.offset|)) 0)) is different from false [2023-01-28 08:18:04,970 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1699 (Array Int Int)) (|~#a~0.offset| Int) (|t_funThread2of2ForFork0_~i~0#1| Int) (|t_funThread1of2ForFork0_~i~0#1| Int) (v_ArrVal_1704 (Array Int Int))) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1699))) (store .cse0 |c_~#a~0.base| (let ((.cse1 (select .cse0 |c_~#a~0.base|)) (.cse2 (+ (* |t_funThread1of2ForFork0_~i~0#1| 28) |~#a~0.offset|))) (store .cse1 .cse2 (select .cse1 .cse2))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1704) |c_~#a~0.base|) (+ (* 28 |t_funThread2of2ForFork0_~i~0#1|) |~#a~0.offset|)) 0)) is different from false [2023-01-28 08:18:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-01-28 08:18:05,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794486636] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:18:05,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:18:05,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 20 [2023-01-28 08:18:05,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782761347] [2023-01-28 08:18:05,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:18:05,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 08:18:05,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:18:05,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 08:18:05,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=178, Unknown=11, NotChecked=198, Total=462 [2023-01-28 08:18:05,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 489 [2023-01-28 08:18:05,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 132 transitions, 1143 flow. Second operand has 22 states, 22 states have (on average 170.77272727272728) internal successors, (3757), 22 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:05,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:18:05,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 489 [2023-01-28 08:18:05,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:18:05,543 INFO L130 PetriNetUnfolder]: 721/1667 cut-off events. [2023-01-28 08:18:05,543 INFO L131 PetriNetUnfolder]: For 12856/12862 co-relation queries the response was YES. [2023-01-28 08:18:05,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8805 conditions, 1667 events. 721/1667 cut-off events. For 12856/12862 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11865 event pairs, 198 based on Foata normal form. 9/1535 useless extension candidates. Maximal degree in co-relation 7893. Up to 527 conditions per place. [2023-01-28 08:18:05,550 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 46 selfloop transitions, 3 changer transitions 115/168 dead transitions. [2023-01-28 08:18:05,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 168 transitions, 1828 flow [2023-01-28 08:18:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 08:18:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 08:18:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1582 transitions. [2023-01-28 08:18:05,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35946375823676435 [2023-01-28 08:18:05,552 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1582 transitions. [2023-01-28 08:18:05,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1582 transitions. [2023-01-28 08:18:05,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:18:05,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1582 transitions. [2023-01-28 08:18:05,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.77777777777777) internal successors, (1582), 9 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:05,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:05,555 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:05,555 INFO L175 Difference]: Start difference. First operand has 145 places, 132 transitions, 1143 flow. Second operand 9 states and 1582 transitions. [2023-01-28 08:18:05,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 168 transitions, 1828 flow [2023-01-28 08:18:05,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 168 transitions, 1702 flow, removed 37 selfloop flow, removed 9 redundant places. [2023-01-28 08:18:05,574 INFO L231 Difference]: Finished difference. Result has 143 places, 52 transitions, 324 flow [2023-01-28 08:18:05,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=324, PETRI_PLACES=143, PETRI_TRANSITIONS=52} [2023-01-28 08:18:05,575 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 75 predicate places. [2023-01-28 08:18:05,575 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 52 transitions, 324 flow [2023-01-28 08:18:05,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 170.77272727272728) internal successors, (3757), 22 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:05,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:18:05,576 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:18:05,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 08:18:05,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:18:05,778 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:18:05,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:18:05,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1805610210, now seen corresponding path program 1 times [2023-01-28 08:18:05,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:18:05,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022492333] [2023-01-28 08:18:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:18:05,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:18:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:18:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:18:06,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:18:06,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022492333] [2023-01-28 08:18:06,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022492333] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:18:06,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949813274] [2023-01-28 08:18:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:18:06,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:18:06,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:18:06,097 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:18:06,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 08:18:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:18:06,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 08:18:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:18:06,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:18:06,303 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:18:06,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:18:06,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:18:06,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:18:06,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-01-28 08:18:06,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2023-01-28 08:18:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:18:06,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:18:39,091 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1797 (Array Int Int)) (|v_t_funThread1of2ForFork0_~i~0#1_117| Int) (|~#a~0.offset| Int) (|t_funThread2of2ForFork0_~i~0#1| Int)) (or (<= 10 |v_t_funThread1of2ForFork0_~i~0#1_117|) (= (select (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1797) |c_~#a~0.base|)) (.cse1 (+ (* 28 |t_funThread2of2ForFork0_~i~0#1|) |~#a~0.offset|))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ (* |v_t_funThread1of2ForFork0_~i~0#1_117| 28) |~#a~0.offset|)) 0) (< |v_t_funThread1of2ForFork0_~i~0#1_117| 1))) is different from false [2023-01-28 08:18:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-01-28 08:18:39,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949813274] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:18:39,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:18:39,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-01-28 08:18:39,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855667689] [2023-01-28 08:18:39,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:18:39,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 08:18:39,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:18:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 08:18:39,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=395, Unknown=16, NotChecked=42, Total=552 [2023-01-28 08:18:39,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 489 [2023-01-28 08:18:39,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 52 transitions, 324 flow. Second operand has 24 states, 24 states have (on average 170.54166666666666) internal successors, (4093), 24 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:39,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:18:39,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 489 [2023-01-28 08:18:39,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:18:45,815 INFO L130 PetriNetUnfolder]: 95/261 cut-off events. [2023-01-28 08:18:45,815 INFO L131 PetriNetUnfolder]: For 1230/1230 co-relation queries the response was YES. [2023-01-28 08:18:45,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 261 events. 95/261 cut-off events. For 1230/1230 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1049 event pairs, 4 based on Foata normal form. 9/270 useless extension candidates. Maximal degree in co-relation 1099. Up to 68 conditions per place. [2023-01-28 08:18:45,816 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 52 selfloop transitions, 22 changer transitions 4/82 dead transitions. [2023-01-28 08:18:45,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 82 transitions, 695 flow [2023-01-28 08:18:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 08:18:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 08:18:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2244 transitions. [2023-01-28 08:18:45,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3529966965549788 [2023-01-28 08:18:45,819 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2244 transitions. [2023-01-28 08:18:45,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2244 transitions. [2023-01-28 08:18:45,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:18:45,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2244 transitions. [2023-01-28 08:18:45,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 172.6153846153846) internal successors, (2244), 13 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:45,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:45,823 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:45,824 INFO L175 Difference]: Start difference. First operand has 143 places, 52 transitions, 324 flow. Second operand 13 states and 2244 transitions. [2023-01-28 08:18:45,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 82 transitions, 695 flow [2023-01-28 08:18:45,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 614 flow, removed 27 selfloop flow, removed 22 redundant places. [2023-01-28 08:18:45,827 INFO L231 Difference]: Finished difference. Result has 90 places, 59 transitions, 377 flow [2023-01-28 08:18:45,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=377, PETRI_PLACES=90, PETRI_TRANSITIONS=59} [2023-01-28 08:18:45,827 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 22 predicate places. [2023-01-28 08:18:45,827 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 59 transitions, 377 flow [2023-01-28 08:18:45,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 170.54166666666666) internal successors, (4093), 24 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:45,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:18:45,828 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:18:45,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 08:18:46,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-01-28 08:18:46,028 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 08:18:46,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:18:46,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1056604072, now seen corresponding path program 2 times [2023-01-28 08:18:46,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:18:46,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975744634] [2023-01-28 08:18:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:18:46,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:18:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:18:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-01-28 08:18:46,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:18:46,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975744634] [2023-01-28 08:18:46,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975744634] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:18:46,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312428642] [2023-01-28 08:18:46,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:18:46,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:18:46,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:18:46,372 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:18:46,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 08:18:46,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:18:46,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:18:46,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 08:18:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:18:46,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:18:46,672 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-01-28 08:18:46,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2023-01-28 08:18:46,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:18:46,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:18:46,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:18:46,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:18:46,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-01-28 08:18:46,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2023-01-28 08:18:47,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:18:47,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:18:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-01-28 08:18:47,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 08:18:47,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312428642] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:18:47,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 08:18:47,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-01-28 08:18:47,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102363086] [2023-01-28 08:18:47,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:18:47,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 08:18:47,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:18:47,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 08:18:47,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-01-28 08:18:47,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 489 [2023-01-28 08:18:47,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 59 transitions, 377 flow. Second operand has 8 states, 8 states have (on average 173.75) internal successors, (1390), 8 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:47,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:18:47,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 489 [2023-01-28 08:18:47,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:18:47,160 INFO L130 PetriNetUnfolder]: 90/255 cut-off events. [2023-01-28 08:18:47,160 INFO L131 PetriNetUnfolder]: For 688/688 co-relation queries the response was YES. [2023-01-28 08:18:47,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 255 events. 90/255 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1018 event pairs, 21 based on Foata normal form. 3/258 useless extension candidates. Maximal degree in co-relation 1039. Up to 97 conditions per place. [2023-01-28 08:18:47,160 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 0 selfloop transitions, 0 changer transitions 66/66 dead transitions. [2023-01-28 08:18:47,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 66 transitions, 546 flow [2023-01-28 08:18:47,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 08:18:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 08:18:47,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1402 transitions. [2023-01-28 08:18:47,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35838445807770963 [2023-01-28 08:18:47,162 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1402 transitions. [2023-01-28 08:18:47,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1402 transitions. [2023-01-28 08:18:47,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:18:47,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1402 transitions. [2023-01-28 08:18:47,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 175.25) internal successors, (1402), 8 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:47,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 489.0) internal successors, (4401), 9 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:47,165 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 489.0) internal successors, (4401), 9 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:47,165 INFO L175 Difference]: Start difference. First operand has 90 places, 59 transitions, 377 flow. Second operand 8 states and 1402 transitions. [2023-01-28 08:18:47,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 66 transitions, 546 flow [2023-01-28 08:18:47,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 66 transitions, 486 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-01-28 08:18:47,167 INFO L231 Difference]: Finished difference. Result has 85 places, 0 transitions, 0 flow [2023-01-28 08:18:47,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=85, PETRI_TRANSITIONS=0} [2023-01-28 08:18:47,168 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 17 predicate places. [2023-01-28 08:18:47,168 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 0 transitions, 0 flow [2023-01-28 08:18:47,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.75) internal successors, (1390), 8 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:47,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 08:18:47,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-28 08:18:47,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-28 08:18:47,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-28 08:18:47,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 08:18:47,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:18:47,369 INFO L445 BasicCegarLoop]: Path program histogram: [6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 08:18:47,370 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 08:18:47,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-01-28 08:18:47,410 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-01-28 08:18:47,410 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-28 08:18:47,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-01-28 08:18:47,414 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 266 transitions, 550 flow [2023-01-28 08:18:47,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 266 transitions, 550 flow [2023-01-28 08:18:47,417 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:18:47,417 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 266 transitions, 550 flow [2023-01-28 08:18:47,417 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 266 transitions, 550 flow [2023-01-28 08:18:47,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-01-28 08:18:47,453 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-01-28 08:18:47,453 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-28 08:18:47,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-01-28 08:18:47,466 INFO L119 LiptonReduction]: Number of co-enabled transitions 33228 [2023-01-28 08:18:50,563 INFO L134 LiptonReduction]: Checked pairs total: 56798 [2023-01-28 08:18:50,563 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-01-28 08:18:50,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 08:18:50,565 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;@2a30d4de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:18:50,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 08:18:50,569 INFO L130 PetriNetUnfolder]: 37/112 cut-off events. [2023-01-28 08:18:50,569 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 08:18:50,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:18:50,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 08:18:50,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:18:50,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:18:50,569 INFO L85 PathProgramCache]: Analyzing trace with hash 825656438, now seen corresponding path program 1 times [2023-01-28 08:18:50,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:18:50,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785709691] [2023-01-28 08:18:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:18:50,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:18:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:18:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 08:18:50,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:18:50,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785709691] [2023-01-28 08:18:50,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785709691] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:18:50,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:18:50,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:18:50,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282248761] [2023-01-28 08:18:50,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:18:50,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:18:50,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:18:50,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:18:50,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:18:50,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 480 [2023-01-28 08:18:50,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:50,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:18:50,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 480 [2023-01-28 08:18:50,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:18:51,268 INFO L130 PetriNetUnfolder]: 10559/16533 cut-off events. [2023-01-28 08:18:51,268 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-28 08:18:51,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32068 conditions, 16533 events. 10559/16533 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 109398 event pairs, 9818 based on Foata normal form. 2499/16469 useless extension candidates. Maximal degree in co-relation 13984. Up to 15431 conditions per place. [2023-01-28 08:18:51,304 INFO L137 encePairwiseOnDemand]: 446/480 looper letters, 38 selfloop transitions, 2 changer transitions 23/70 dead transitions. [2023-01-28 08:18:51,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-01-28 08:18:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:18:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:18:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2023-01-28 08:18:51,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2023-01-28 08:18:51,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2023-01-28 08:18:51,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2023-01-28 08:18:51,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:18:51,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2023-01-28 08:18:51,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:51,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:51,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 480.0) internal successors, (1920), 4 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:51,307 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 729 transitions. [2023-01-28 08:18:51,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-01-28 08:18:51,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 08:18:51,309 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 116 flow [2023-01-28 08:18:51,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-01-28 08:18:51,309 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-01-28 08:18:51,309 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 116 flow [2023-01-28 08:18:51,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:51,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:18:51,309 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-28 08:18:51,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-01-28 08:18:51,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:18:51,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:18:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 92065484, now seen corresponding path program 1 times [2023-01-28 08:18:51,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:18:51,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981061829] [2023-01-28 08:18:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:18:51,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:18:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:18:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 08:18:51,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:18:51,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981061829] [2023-01-28 08:18:51,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981061829] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:18:51,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197640013] [2023-01-28 08:18:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:18:51,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:18:51,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:18:51,330 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:18:51,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 08:18:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:18:51,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 08:18:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:18:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 08:18:51,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:18:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 08:18:51,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197640013] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:18:51,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:18:51,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 08:18:51,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516372946] [2023-01-28 08:18:51,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:18:51,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 08:18:51,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:18:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 08:18:51,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 08:18:51,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 480 [2023-01-28 08:18:51,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 214.71428571428572) internal successors, (1503), 7 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:51,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:18:51,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 480 [2023-01-28 08:18:51,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:18:51,641 INFO L130 PetriNetUnfolder]: 1958/3219 cut-off events. [2023-01-28 08:18:51,641 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-01-28 08:18:51,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 3219 events. 1958/3219 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17555 event pairs, 1837 based on Foata normal form. 0/2639 useless extension candidates. Maximal degree in co-relation 6287. Up to 2999 conditions per place. [2023-01-28 08:18:51,649 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 38 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-01-28 08:18:51,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 214 flow [2023-01-28 08:18:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 08:18:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 08:18:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1324 transitions. [2023-01-28 08:18:51,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597222222222222 [2023-01-28 08:18:51,651 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1324 transitions. [2023-01-28 08:18:51,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1324 transitions. [2023-01-28 08:18:51,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:18:51,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1324 transitions. [2023-01-28 08:18:51,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 220.66666666666666) internal successors, (1324), 6 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:51,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:51,653 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 480.0) internal successors, (3360), 7 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:51,653 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 116 flow. Second operand 6 states and 1324 transitions. [2023-01-28 08:18:51,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 214 flow [2023-01-28 08:18:51,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 208 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 08:18:51,654 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-01-28 08:18:51,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-01-28 08:18:51,655 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-01-28 08:18:51,655 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-01-28 08:18:51,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 214.71428571428572) internal successors, (1503), 7 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:51,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:18:51,655 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 08:18:51,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-28 08:18:51,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:18:51,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:18:51,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:18:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash 899770870, now seen corresponding path program 2 times [2023-01-28 08:18:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:18:51,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873715688] [2023-01-28 08:18:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:18:51,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:18:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:18:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 08:18:51,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:18:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873715688] [2023-01-28 08:18:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873715688] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:18:51,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309437208] [2023-01-28 08:18:51,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:18:51,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:18:51,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:18:51,903 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:18:51,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 08:18:52,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:18:52,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:18:52,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 08:18:52,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:18:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 08:18:52,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:18:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 08:18:52,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309437208] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:18:52,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:18:52,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 08:18:52,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952711780] [2023-01-28 08:18:52,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:18:52,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 08:18:52,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:18:52,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 08:18:52,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 08:18:52,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 480 [2023-01-28 08:18:52,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 214.3846153846154) internal successors, (2787), 13 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:52,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:18:52,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 480 [2023-01-28 08:18:52,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:18:52,325 INFO L130 PetriNetUnfolder]: 1958/3225 cut-off events. [2023-01-28 08:18:52,326 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2023-01-28 08:18:52,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 3225 events. 1958/3225 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17556 event pairs, 1837 based on Foata normal form. 6/2652 useless extension candidates. Maximal degree in co-relation 6272. Up to 2999 conditions per place. [2023-01-28 08:18:52,334 INFO L137 encePairwiseOnDemand]: 477/480 looper letters, 38 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-01-28 08:18:52,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 280 flow [2023-01-28 08:18:52,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 08:18:52,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 08:18:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2611 transitions. [2023-01-28 08:18:52,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45329861111111114 [2023-01-28 08:18:52,337 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2611 transitions. [2023-01-28 08:18:52,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2611 transitions. [2023-01-28 08:18:52,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:18:52,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2611 transitions. [2023-01-28 08:18:52,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 217.58333333333334) internal successors, (2611), 12 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:52,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 480.0) internal successors, (6240), 13 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:52,344 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 480.0) internal successors, (6240), 13 states have internal predecessors, (6240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:52,344 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2611 transitions. [2023-01-28 08:18:52,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 280 flow [2023-01-28 08:18:52,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 266 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 08:18:52,346 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-01-28 08:18:52,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=480, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-01-28 08:18:52,346 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-01-28 08:18:52,346 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-01-28 08:18:52,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 214.3846153846154) internal successors, (2787), 13 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:52,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:18:52,347 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 08:18:52,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 08:18:52,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:18:52,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 08:18:52,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:18:52,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1112545846, now seen corresponding path program 3 times [2023-01-28 08:18:52,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:18:52,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235660294] [2023-01-28 08:18:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:18:52,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:18:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:18:52,564 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 08:18:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 08:18:52,578 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 08:18:52,579 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 08:18:52,579 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 08:18:52,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-01-28 08:18:52,579 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 08:18:52,579 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 08:18:52,580 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 08:18:52,580 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 08:18:52,622 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 08:18:52,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-01-28 08:18:52,697 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-01-28 08:18:52,697 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-28 08:18:52,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-01-28 08:18:52,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 339 transitions, 708 flow [2023-01-28 08:18:52,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 339 transitions, 708 flow [2023-01-28 08:18:52,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 08:18:52,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 339 transitions, 708 flow [2023-01-28 08:18:52,713 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 339 transitions, 708 flow [2023-01-28 08:18:52,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-01-28 08:18:52,794 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-01-28 08:18:52,794 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-28 08:18:52,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-01-28 08:18:52,825 INFO L119 LiptonReduction]: Number of co-enabled transitions 65604 [2023-01-28 08:18:56,772 INFO L134 LiptonReduction]: Checked pairs total: 111258 [2023-01-28 08:18:56,772 INFO L136 LiptonReduction]: Total number of compositions: 280 [2023-01-28 08:18:56,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 08:18:56,773 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;@2a30d4de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 08:18:56,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 08:18:56,775 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-28 08:18:56,775 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 08:18:56,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:18:56,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-28 08:18:56,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 08:18:56,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:18:56,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2000365025, now seen corresponding path program 1 times [2023-01-28 08:18:56,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:18:56,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117489967] [2023-01-28 08:18:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:18:56,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:18:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:18:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:18:56,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:18:56,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117489967] [2023-01-28 08:18:56,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117489967] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:18:56,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:18:56,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 08:18:56,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845932428] [2023-01-28 08:18:56,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:18:56,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:18:56,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:18:56,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:18:56,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 08:18:56,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 619 [2023-01-28 08:18:56,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:18:56,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:18:56,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 619 [2023-01-28 08:18:56,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:19:14,423 INFO L130 PetriNetUnfolder]: 199178/283337 cut-off events. [2023-01-28 08:19:14,423 INFO L131 PetriNetUnfolder]: For 3132/3132 co-relation queries the response was YES. [2023-01-28 08:19:14,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544756 conditions, 283337 events. 199178/283337 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 7636. Compared 2268124 event pairs, 188343 based on Foata normal form. 51888/290822 useless extension candidates. Maximal degree in co-relation 50656. Up to 259483 conditions per place. [2023-01-28 08:19:15,839 INFO L137 encePairwiseOnDemand]: 574/619 looper letters, 69 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-01-28 08:19:15,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 352 flow [2023-01-28 08:19:15,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:19:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:19:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 927 transitions. [2023-01-28 08:19:15,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4991922455573506 [2023-01-28 08:19:15,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 927 transitions. [2023-01-28 08:19:15,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 927 transitions. [2023-01-28 08:19:15,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:19:15,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 927 transitions. [2023-01-28 08:19:15,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:15,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 619.0) internal successors, (2476), 4 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:15,845 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 619.0) internal successors, (2476), 4 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:15,845 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 927 transitions. [2023-01-28 08:19:15,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 352 flow [2023-01-28 08:19:15,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 08:19:15,848 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 220 flow [2023-01-28 08:19:15,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2023-01-28 08:19:15,848 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-01-28 08:19:15,849 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 220 flow [2023-01-28 08:19:15,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:15,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:19:15,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:19:15,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-01-28 08:19:15,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 08:19:15,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:19:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1341187382, now seen corresponding path program 1 times [2023-01-28 08:19:15,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:19:15,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823877309] [2023-01-28 08:19:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:19:15,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:19:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:19:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:19:15,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:19:15,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823877309] [2023-01-28 08:19:15,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823877309] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:19:15,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699982662] [2023-01-28 08:19:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:19:15,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:19:15,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:19:15,871 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:19:15,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 08:19:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:19:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-28 08:19:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:19:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:19:16,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 08:19:16,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699982662] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:19:16,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 08:19:16,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-28 08:19:16,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380053991] [2023-01-28 08:19:16,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:19:16,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 08:19:16,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:19:16,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 08:19:16,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 08:19:16,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 619 [2023-01-28 08:19:16,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:16,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:19:16,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 619 [2023-01-28 08:19:16,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:19:31,888 INFO L130 PetriNetUnfolder]: 199267/282260 cut-off events. [2023-01-28 08:19:31,888 INFO L131 PetriNetUnfolder]: For 3088/3088 co-relation queries the response was YES. [2023-01-28 08:19:32,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543726 conditions, 282260 events. 199267/282260 cut-off events. For 3088/3088 co-relation queries the response was YES. Maximal size of possible extension queue 7587. Compared 2239090 event pairs, 123187 based on Foata normal form. 0/237982 useless extension candidates. Maximal degree in co-relation 543712. Up to 259453 conditions per place. [2023-01-28 08:19:33,141 INFO L137 encePairwiseOnDemand]: 616/619 looper letters, 85 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-01-28 08:19:33,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 426 flow [2023-01-28 08:19:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 08:19:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 08:19:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-01-28 08:19:33,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48465266558966075 [2023-01-28 08:19:33,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-01-28 08:19:33,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-01-28 08:19:33,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:19:33,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-01-28 08:19:33,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:33,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 619.0) internal successors, (2476), 4 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:33,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 619.0) internal successors, (2476), 4 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:33,145 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 220 flow. Second operand 3 states and 900 transitions. [2023-01-28 08:19:33,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 426 flow [2023-01-28 08:19:33,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 106 transitions, 422 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 08:19:33,148 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 228 flow [2023-01-28 08:19:33,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2023-01-28 08:19:33,148 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-01-28 08:19:33,148 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 228 flow [2023-01-28 08:19:33,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:33,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:19:33,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:19:33,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 08:19:33,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 08:19:33,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 08:19:33,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:19:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash -545458772, now seen corresponding path program 1 times [2023-01-28 08:19:33,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:19:33,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042598173] [2023-01-28 08:19:33,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:19:33,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:19:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:19:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:19:33,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:19:33,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042598173] [2023-01-28 08:19:33,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042598173] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:19:33,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228935620] [2023-01-28 08:19:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:19:33,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:19:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:19:33,373 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:19:33,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 08:19:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:19:33,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 08:19:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:19:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:19:33,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:19:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:19:33,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228935620] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:19:33,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:19:33,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 08:19:33,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575772806] [2023-01-28 08:19:33,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:19:33,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 08:19:33,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:19:33,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 08:19:33,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 08:19:33,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 619 [2023-01-28 08:19:33,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:33,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:19:33,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 619 [2023-01-28 08:19:33,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:19:49,482 INFO L130 PetriNetUnfolder]: 200915/283582 cut-off events. [2023-01-28 08:19:49,482 INFO L131 PetriNetUnfolder]: For 10256/10256 co-relation queries the response was YES. [2023-01-28 08:19:50,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552245 conditions, 283582 events. 200915/283582 cut-off events. For 10256/10256 co-relation queries the response was YES. Maximal size of possible extension queue 7575. Compared 2229107 event pairs, 188343 based on Foata normal form. 3/242695 useless extension candidates. Maximal degree in co-relation 552216. Up to 259469 conditions per place. [2023-01-28 08:19:50,827 INFO L137 encePairwiseOnDemand]: 616/619 looper letters, 70 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-01-28 08:19:50,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 390 flow [2023-01-28 08:19:50,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 08:19:50,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 08:19:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1703 transitions. [2023-01-28 08:19:50,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585352719439957 [2023-01-28 08:19:50,829 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1703 transitions. [2023-01-28 08:19:50,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1703 transitions. [2023-01-28 08:19:50,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:19:50,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1703 transitions. [2023-01-28 08:19:50,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.8333333333333) internal successors, (1703), 6 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:50,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 619.0) internal successors, (4333), 7 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:50,834 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 619.0) internal successors, (4333), 7 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:50,834 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 228 flow. Second operand 6 states and 1703 transitions. [2023-01-28 08:19:50,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 390 flow [2023-01-28 08:19:50,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:19:50,842 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 262 flow [2023-01-28 08:19:50,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2023-01-28 08:19:50,842 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2023-01-28 08:19:50,842 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 262 flow [2023-01-28 08:19:50,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:50,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:19:50,843 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:19:50,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 08:19:51,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 08:19:51,043 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 08:19:51,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:19:51,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1815114261, now seen corresponding path program 2 times [2023-01-28 08:19:51,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:19:51,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605188188] [2023-01-28 08:19:51,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:19:51,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:19:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:19:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 08:19:51,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:19:51,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605188188] [2023-01-28 08:19:51,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605188188] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:19:51,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867184236] [2023-01-28 08:19:51,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:19:51,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:19:51,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:19:51,089 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:19:51,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 08:19:51,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 08:19:51,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:19:51,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-28 08:19:51,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:19:51,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:19:51,261 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:19:51,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:19:51,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:19:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:19:51,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 08:19:51,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867184236] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:19:51,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 08:19:51,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-28 08:19:51,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738417196] [2023-01-28 08:19:51,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:19:51,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 08:19:51,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:19:51,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 08:19:51,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 08:19:51,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 619 [2023-01-28 08:19:51,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:19:51,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:19:51,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 619 [2023-01-28 08:19:51,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:20:12,032 INFO L130 PetriNetUnfolder]: 259751/363528 cut-off events. [2023-01-28 08:20:12,032 INFO L131 PetriNetUnfolder]: For 12804/12804 co-relation queries the response was YES. [2023-01-28 08:20:12,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717900 conditions, 363528 events. 259751/363528 cut-off events. For 12804/12804 co-relation queries the response was YES. Maximal size of possible extension queue 9577. Compared 2870756 event pairs, 59829 based on Foata normal form. 0/319468 useless extension candidates. Maximal degree in co-relation 717863. Up to 299798 conditions per place. [2023-01-28 08:20:13,702 INFO L137 encePairwiseOnDemand]: 607/619 looper letters, 194 selfloop transitions, 18 changer transitions 0/227 dead transitions. [2023-01-28 08:20:13,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 227 transitions, 1003 flow [2023-01-28 08:20:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 08:20:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 08:20:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1585 transitions. [2023-01-28 08:20:13,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267635971997846 [2023-01-28 08:20:13,704 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1585 transitions. [2023-01-28 08:20:13,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1585 transitions. [2023-01-28 08:20:13,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:20:13,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1585 transitions. [2023-01-28 08:20:13,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 264.1666666666667) internal successors, (1585), 6 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:13,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 619.0) internal successors, (4333), 7 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:13,707 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 619.0) internal successors, (4333), 7 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:13,707 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 262 flow. Second operand 6 states and 1585 transitions. [2023-01-28 08:20:13,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 227 transitions, 1003 flow [2023-01-28 08:20:13,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 227 transitions, 989 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 08:20:13,713 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 375 flow [2023-01-28 08:20:13,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2023-01-28 08:20:13,713 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 20 predicate places. [2023-01-28 08:20:13,713 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 375 flow [2023-01-28 08:20:13,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 229.33333333333334) internal successors, (1376), 6 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:13,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:20:13,714 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:20:13,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-01-28 08:20:13,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 08:20:13,914 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 08:20:13,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:20:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1368982061, now seen corresponding path program 1 times [2023-01-28 08:20:13,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:20:13,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498863162] [2023-01-28 08:20:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:20:13,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:20:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:20:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 08:20:13,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:20:13,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498863162] [2023-01-28 08:20:13,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498863162] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:20:13,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069461588] [2023-01-28 08:20:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:20:13,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:20:13,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:20:13,949 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:20:13,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 08:20:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:20:14,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 08:20:14,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:20:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:20:14,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:20:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 08:20:14,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069461588] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:20:14,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:20:14,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-01-28 08:20:14,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413955797] [2023-01-28 08:20:14,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:20:14,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 08:20:14,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:20:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 08:20:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-01-28 08:20:14,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 619 [2023-01-28 08:20:14,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 375 flow. Second operand has 14 states, 14 states have (on average 267.07142857142856) internal successors, (3739), 14 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:14,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:20:14,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 619 [2023-01-28 08:20:14,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:20:33,605 INFO L130 PetriNetUnfolder]: 205511/290481 cut-off events. [2023-01-28 08:20:33,605 INFO L131 PetriNetUnfolder]: For 116346/116346 co-relation queries the response was YES. [2023-01-28 08:20:34,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 649417 conditions, 290481 events. 205511/290481 cut-off events. For 116346/116346 co-relation queries the response was YES. Maximal size of possible extension queue 8509. Compared 2325489 event pairs, 62524 based on Foata normal form. 21/271113 useless extension candidates. Maximal degree in co-relation 649357. Up to 272345 conditions per place. [2023-01-28 08:20:35,436 INFO L137 encePairwiseOnDemand]: 614/619 looper letters, 131 selfloop transitions, 14 changer transitions 0/164 dead transitions. [2023-01-28 08:20:35,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 164 transitions, 837 flow [2023-01-28 08:20:35,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 08:20:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 08:20:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3842 transitions. [2023-01-28 08:20:35,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433417955227325 [2023-01-28 08:20:35,440 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3842 transitions. [2023-01-28 08:20:35,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3842 transitions. [2023-01-28 08:20:35,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:20:35,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3842 transitions. [2023-01-28 08:20:35,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 274.42857142857144) internal successors, (3842), 14 states have internal predecessors, (3842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:35,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 619.0) internal successors, (9285), 15 states have internal predecessors, (9285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:35,450 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 619.0) internal successors, (9285), 15 states have internal predecessors, (9285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:35,450 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 375 flow. Second operand 14 states and 3842 transitions. [2023-01-28 08:20:35,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 164 transitions, 837 flow [2023-01-28 08:20:35,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 164 transitions, 837 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 08:20:35,867 INFO L231 Difference]: Finished difference. Result has 122 places, 117 transitions, 451 flow [2023-01-28 08:20:35,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=451, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2023-01-28 08:20:35,868 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 34 predicate places. [2023-01-28 08:20:35,868 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 451 flow [2023-01-28 08:20:35,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 267.07142857142856) internal successors, (3739), 14 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:35,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:20:35,868 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:20:35,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 08:20:36,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-01-28 08:20:36,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 08:20:36,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:20:36,069 INFO L85 PathProgramCache]: Analyzing trace with hash 200015773, now seen corresponding path program 1 times [2023-01-28 08:20:36,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:20:36,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890067765] [2023-01-28 08:20:36,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:20:36,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:20:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:20:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 08:20:36,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:20:36,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890067765] [2023-01-28 08:20:36,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890067765] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 08:20:36,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 08:20:36,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 08:20:36,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171598561] [2023-01-28 08:20:36,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 08:20:36,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 08:20:36,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:20:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 08:20:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 08:20:36,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 619 [2023-01-28 08:20:36,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 451 flow. Second operand has 5 states, 5 states have (on average 217.4) internal successors, (1087), 5 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:36,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:20:36,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 619 [2023-01-28 08:20:36,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:20:48,766 INFO L130 PetriNetUnfolder]: 113002/176109 cut-off events. [2023-01-28 08:20:48,766 INFO L131 PetriNetUnfolder]: For 64981/64981 co-relation queries the response was YES. [2023-01-28 08:20:49,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403173 conditions, 176109 events. 113002/176109 cut-off events. For 64981/64981 co-relation queries the response was YES. Maximal size of possible extension queue 4596. Compared 1527162 event pairs, 44663 based on Foata normal form. 31398/190334 useless extension candidates. Maximal degree in co-relation 403099. Up to 98175 conditions per place. [2023-01-28 08:20:49,846 INFO L137 encePairwiseOnDemand]: 591/619 looper letters, 158 selfloop transitions, 28 changer transitions 0/197 dead transitions. [2023-01-28 08:20:49,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 1110 flow [2023-01-28 08:20:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 08:20:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 08:20:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1008 transitions. [2023-01-28 08:20:49,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407108239095315 [2023-01-28 08:20:49,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1008 transitions. [2023-01-28 08:20:49,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1008 transitions. [2023-01-28 08:20:49,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:20:49,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1008 transitions. [2023-01-28 08:20:49,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:49,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 619.0) internal successors, (3095), 5 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:49,850 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 619.0) internal successors, (3095), 5 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:49,850 INFO L175 Difference]: Start difference. First operand has 122 places, 117 transitions, 451 flow. Second operand 4 states and 1008 transitions. [2023-01-28 08:20:49,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 1110 flow [2023-01-28 08:20:49,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 197 transitions, 1037 flow, removed 26 selfloop flow, removed 10 redundant places. [2023-01-28 08:20:49,967 INFO L231 Difference]: Finished difference. Result has 116 places, 132 transitions, 524 flow [2023-01-28 08:20:49,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=524, PETRI_PLACES=116, PETRI_TRANSITIONS=132} [2023-01-28 08:20:49,968 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 28 predicate places. [2023-01-28 08:20:49,968 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 132 transitions, 524 flow [2023-01-28 08:20:49,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 217.4) internal successors, (1087), 5 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:20:49,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:20:49,968 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:20:49,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-01-28 08:20:49,969 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 08:20:49,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:20:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1155192965, now seen corresponding path program 1 times [2023-01-28 08:20:49,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:20:49,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293775335] [2023-01-28 08:20:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:20:49,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:20:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:20:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:20:50,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:20:50,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293775335] [2023-01-28 08:20:50,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293775335] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:20:50,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642284098] [2023-01-28 08:20:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:20:50,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:20:50,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:20:50,263 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:20:50,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 08:20:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:20:50,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 08:20:50,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:20:50,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:20:50,477 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:20:50,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:20:50,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:20:50,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:20:50,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:20:50,564 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:20:50,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:20:50,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:20:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:20:50,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:20:50,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-01-28 08:20:50,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 8 [2023-01-28 08:21:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:21:00,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642284098] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:21:00,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:21:00,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-01-28 08:21:00,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199289235] [2023-01-28 08:21:00,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:21:00,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 08:21:00,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:21:00,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 08:21:00,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=225, Unknown=6, NotChecked=0, Total=306 [2023-01-28 08:21:00,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 619 [2023-01-28 08:21:00,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 132 transitions, 524 flow. Second operand has 18 states, 18 states have (on average 194.72222222222223) internal successors, (3505), 18 states have internal predecessors, (3505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:21:00,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:21:00,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 619 [2023-01-28 08:21:00,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:21:22,743 INFO L130 PetriNetUnfolder]: 183777/285675 cut-off events. [2023-01-28 08:21:22,743 INFO L131 PetriNetUnfolder]: For 162077/162540 co-relation queries the response was YES. [2023-01-28 08:21:23,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781062 conditions, 285675 events. 183777/285675 cut-off events. For 162077/162540 co-relation queries the response was YES. Maximal size of possible extension queue 6835. Compared 2602522 event pairs, 32471 based on Foata normal form. 546/258105 useless extension candidates. Maximal degree in co-relation 736765. Up to 139454 conditions per place. [2023-01-28 08:21:24,334 INFO L137 encePairwiseOnDemand]: 594/619 looper letters, 606 selfloop transitions, 113 changer transitions 32/762 dead transitions. [2023-01-28 08:21:24,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 762 transitions, 4403 flow [2023-01-28 08:21:24,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 08:21:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 08:21:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4093 transitions. [2023-01-28 08:21:24,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673487704182373 [2023-01-28 08:21:24,338 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4093 transitions. [2023-01-28 08:21:24,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4093 transitions. [2023-01-28 08:21:24,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:21:24,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4093 transitions. [2023-01-28 08:21:24,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 227.38888888888889) internal successors, (4093), 18 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:21:24,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 619.0) internal successors, (11761), 19 states have internal predecessors, (11761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:21:24,347 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 619.0) internal successors, (11761), 19 states have internal predecessors, (11761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:21:24,347 INFO L175 Difference]: Start difference. First operand has 116 places, 132 transitions, 524 flow. Second operand 18 states and 4093 transitions. [2023-01-28 08:21:24,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 762 transitions, 4403 flow [2023-01-28 08:21:27,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 762 transitions, 4402 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 08:21:27,872 INFO L231 Difference]: Finished difference. Result has 145 places, 227 transitions, 1452 flow [2023-01-28 08:21:27,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1452, PETRI_PLACES=145, PETRI_TRANSITIONS=227} [2023-01-28 08:21:27,872 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 57 predicate places. [2023-01-28 08:21:27,872 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 227 transitions, 1452 flow [2023-01-28 08:21:27,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 194.72222222222223) internal successors, (3505), 18 states have internal predecessors, (3505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:21:27,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:21:27,873 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:21:27,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 08:21:28,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:21:28,074 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 08:21:28,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:21:28,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2111600955, now seen corresponding path program 2 times [2023-01-28 08:21:28,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:21:28,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669425045] [2023-01-28 08:21:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:21:28,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:21:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:21:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:21:28,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:21:28,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669425045] [2023-01-28 08:21:28,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669425045] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:21:28,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979487040] [2023-01-28 08:21:28,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 08:21:28,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:21:28,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:21:28,331 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:21:28,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 08:21:28,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 08:21:28,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 08:21:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 08:21:28,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:21:28,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:21:28,660 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:21:28,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:21:28,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:21:28,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:21:28,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:21:28,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:21:28,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:21:28,795 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:21:28,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:21:28,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:21:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:21:28,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:21:28,949 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2332 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_2332) |c_~#a~0.base|) (+ (* |c_t_funThread2of3ForFork0_~i~0#1| 28) |c_~#a~0.offset| (- 24))) 0))) (forall ((|v_t_funThread1of3ForFork0_~i~0#1_89| Int) (v_ArrVal_2332 (Array Int Int))) (let ((.cse0 (* |v_t_funThread1of3ForFork0_~i~0#1_89| 28))) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_2332) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0)) (= (select (select |c_#memory_int| |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0)) 0))))) is different from false [2023-01-28 08:21:28,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:21:28,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-01-28 08:21:28,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2023-01-28 08:21:28,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:21:28,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-01-28 08:21:28,988 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 08:21:28,994 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 08:21:28,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 12 [2023-01-28 08:21:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:21:43,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979487040] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:21:43,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:21:43,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 08:21:43,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779718469] [2023-01-28 08:21:43,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:21:43,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 08:21:43,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:21:43,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 08:21:43,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=258, Unknown=3, NotChecked=34, Total=380 [2023-01-28 08:21:43,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 619 [2023-01-28 08:21:43,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 227 transitions, 1452 flow. Second operand has 20 states, 20 states have (on average 195.4) internal successors, (3908), 20 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:21:43,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:21:43,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 619 [2023-01-28 08:21:43,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:21:45,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:21:47,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 08:21:50,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 08:22:34,956 INFO L130 PetriNetUnfolder]: 249029/387274 cut-off events. [2023-01-28 08:22:34,957 INFO L131 PetriNetUnfolder]: For 1004159/1005079 co-relation queries the response was YES. [2023-01-28 08:22:37,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382083 conditions, 387274 events. 249029/387274 cut-off events. For 1004159/1005079 co-relation queries the response was YES. Maximal size of possible extension queue 9603. Compared 3657946 event pairs, 44425 based on Foata normal form. 681/350183 useless extension candidates. Maximal degree in co-relation 1316849. Up to 167577 conditions per place. [2023-01-28 08:22:38,821 INFO L137 encePairwiseOnDemand]: 595/619 looper letters, 662 selfloop transitions, 214 changer transitions 54/941 dead transitions. [2023-01-28 08:22:38,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 941 transitions, 7545 flow [2023-01-28 08:22:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 08:22:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 08:22:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3936 transitions. [2023-01-28 08:22:38,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3740378219139029 [2023-01-28 08:22:38,825 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3936 transitions. [2023-01-28 08:22:38,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3936 transitions. [2023-01-28 08:22:38,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 08:22:38,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3936 transitions. [2023-01-28 08:22:38,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 231.52941176470588) internal successors, (3936), 17 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:22:38,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 619.0) internal successors, (11142), 18 states have internal predecessors, (11142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:22:38,832 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 619.0) internal successors, (11142), 18 states have internal predecessors, (11142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:22:38,832 INFO L175 Difference]: Start difference. First operand has 145 places, 227 transitions, 1452 flow. Second operand 17 states and 3936 transitions. [2023-01-28 08:22:38,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 941 transitions, 7545 flow [2023-01-28 08:23:04,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 941 transitions, 7545 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 08:23:04,049 INFO L231 Difference]: Finished difference. Result has 175 places, 372 transitions, 3671 flow [2023-01-28 08:23:04,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=619, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3671, PETRI_PLACES=175, PETRI_TRANSITIONS=372} [2023-01-28 08:23:04,050 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 87 predicate places. [2023-01-28 08:23:04,050 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 372 transitions, 3671 flow [2023-01-28 08:23:04,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 195.4) internal successors, (3908), 20 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:23:04,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 08:23:04,051 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 08:23:04,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-28 08:23:04,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-01-28 08:23:04,256 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 08:23:04,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 08:23:04,256 INFO L85 PathProgramCache]: Analyzing trace with hash 46727167, now seen corresponding path program 1 times [2023-01-28 08:23:04,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 08:23:04,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901727454] [2023-01-28 08:23:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:23:04,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 08:23:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:23:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:23:04,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 08:23:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901727454] [2023-01-28 08:23:04,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901727454] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 08:23:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862134554] [2023-01-28 08:23:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 08:23:04,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 08:23:04,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 08:23:04,597 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 08:23:04,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 08:23:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 08:23:04,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 08:23:04,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 08:23:04,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-28 08:23:04,890 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:23:04,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 08:23:04,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:23:04,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-28 08:23:04,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 08:23:04,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 08:23:04,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 08:23:05,020 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 08:23:05,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 11 [2023-01-28 08:23:05,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-01-28 08:23:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-28 08:23:05,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 08:23:05,212 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2418 (Array Int Int)) (|v_t_funThread2of3ForFork0_~i~0#1_87| Int)) (let ((.cse0 (* 28 |v_t_funThread2of3ForFork0_~i~0#1_87|))) (or (< |v_t_funThread2of3ForFork0_~i~0#1_87| 1) (= (select (select |c_#memory_int| |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0)) 0) (<= 10 |v_t_funThread2of3ForFork0_~i~0#1_87|) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_2418) |c_~#a~0.base|) (+ |c_~#a~0.offset| .cse0 (- 24))) 0))))) (or (forall ((v_ArrVal_2418 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_2418) |c_~#a~0.base|) (+ |c_~#a~0.offset| (* |c_t_funThread1of3ForFork0_~i~0#1| 28) (- 24))) 0))) (< |c_t_funThread1of3ForFork0_~i~0#1| 1) (<= 10 |c_t_funThread1of3ForFork0_~i~0#1|))) is different from false [2023-01-28 08:23:05,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:23:05,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-01-28 08:23:05,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2023-01-28 08:23:05,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 08:23:05,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-01-28 08:23:05,257 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 08:23:05,262 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 08:23:05,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 12 [2023-01-28 08:23:21,320 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_t_funThread2of3ForFork0_~i~0#1_87| Int) (v_ArrVal_2415 (Array Int Int)) (|~#a~0.offset| Int)) (or (< |v_t_funThread2of3ForFork0_~i~0#1_87| 1) (<= 10 |v_t_funThread2of3ForFork0_~i~0#1_87|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_2415) |c_~#a~0.base|) (+ |~#a~0.offset| (* 28 |v_t_funThread2of3ForFork0_~i~0#1_87|))) 0))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) is different from false [2023-01-28 08:23:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-01-28 08:23:24,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862134554] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 08:23:24,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 08:23:24,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-01-28 08:23:24,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144378080] [2023-01-28 08:23:24,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 08:23:24,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 08:23:24,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 08:23:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 08:23:24,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=292, Unknown=6, NotChecked=74, Total=462 [2023-01-28 08:23:24,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 619 [2023-01-28 08:23:24,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 372 transitions, 3671 flow. Second operand has 22 states, 22 states have (on average 193.22727272727272) internal successors, (4251), 22 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 08:23:24,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 08:23:24,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 619 [2023-01-28 08:23:24,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 08:23:27,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2023-01-28 08:24:25,548 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 08:24:25,548 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 08:24:26,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-28 08:24:26,759 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-01-28 08:24:26,791 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 137 [2023-01-28 08:24:29,736 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-01-28 08:24:29,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-01-28 08:24:29,736 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-01-28 08:24:29,736 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-28 08:24:29,737 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-28 08:24:29,737 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-28 08:24:29,737 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-28 08:24:29,737 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2023-01-28 08:24:29,738 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT,TIMEOUT (1/2) [2023-01-28 08:24:29,738 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 3 thread instances [2023-01-28 08:24:29,738 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 08:24:29,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 08:24:29 BasicIcfg [2023-01-28 08:24:29,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 08:24:29,747 INFO L158 Benchmark]: Toolchain (without parser) took 745019.43ms. Allocated memory was 388.0MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 345.4MB in the beginning and 8.3GB in the end (delta: -8.0GB). Peak memory consumption was 8.2GB. Max. memory is 16.0GB. [2023-01-28 08:24:29,747 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 255.9MB. Free memory is still 213.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 08:24:29,761 INFO L158 Benchmark]: CACSL2BoogieTranslator took 593.39ms. Allocated memory is still 388.0MB. Free memory was 345.0MB in the beginning and 316.0MB in the end (delta: 29.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-01-28 08:24:29,762 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.01ms. Allocated memory is still 388.0MB. Free memory was 315.7MB in the beginning and 313.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 08:24:29,762 INFO L158 Benchmark]: Boogie Preprocessor took 48.52ms. Allocated memory is still 388.0MB. Free memory was 313.1MB in the beginning and 311.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 08:24:29,762 INFO L158 Benchmark]: RCFGBuilder took 526.40ms. Allocated memory is still 388.0MB. Free memory was 311.1MB in the beginning and 292.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-28 08:24:29,762 INFO L158 Benchmark]: TraceAbstraction took 743775.34ms. Allocated memory was 388.0MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 291.5MB in the beginning and 8.3GB in the end (delta: -8.0GB). Peak memory consumption was 8.2GB. Max. memory is 16.0GB. [2023-01-28 08:24:29,763 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 255.9MB. Free memory is still 213.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 593.39ms. Allocated memory is still 388.0MB. Free memory was 345.0MB in the beginning and 316.0MB in the end (delta: 29.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 70.01ms. Allocated memory is still 388.0MB. Free memory was 315.7MB in the beginning and 313.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 48.52ms. Allocated memory is still 388.0MB. Free memory was 313.1MB in the beginning and 311.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 526.40ms. Allocated memory is still 388.0MB. Free memory was 311.1MB in the beginning and 292.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 743775.34ms. Allocated memory was 388.0MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 291.5MB in the beginning and 8.3GB in the end (delta: -8.0GB). Peak memory consumption was 8.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 161 PlacesBefore, 45 PlacesAfterwards, 188 TransitionsBefore, 66 TransitionsAfterwards, 10792 CoEnabledTransitionPairs, 6 FixpointIterations, 35 TrivialSequentialCompositions, 100 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 18 ConcurrentYvCompositions, 6 ChoiceCompositions, 164 TotalNumberOfCompositions, 17790 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9093, independent: 8818, independent conditional: 0, independent unconditional: 8818, dependent: 275, dependent conditional: 0, dependent unconditional: 275, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5389, independent: 5328, independent conditional: 0, independent unconditional: 5328, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9093, independent: 3490, independent conditional: 0, independent unconditional: 3490, dependent: 214, dependent conditional: 0, dependent unconditional: 214, unknown: 5389, unknown conditional: 0, unknown unconditional: 5389] , Statistics on independence cache: Total cache size (in pairs): 200, Positive cache size: 173, Positive conditional cache size: 0, Positive unconditional cache size: 173, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 161 PlacesBefore, 45 PlacesAfterwards, 188 TransitionsBefore, 66 TransitionsAfterwards, 10792 CoEnabledTransitionPairs, 6 FixpointIterations, 35 TrivialSequentialCompositions, 98 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 18 ConcurrentYvCompositions, 6 ChoiceCompositions, 162 TotalNumberOfCompositions, 17496 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8947, independent: 8676, independent conditional: 0, independent unconditional: 8676, dependent: 271, dependent conditional: 0, dependent unconditional: 271, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5414, independent: 5353, independent conditional: 0, independent unconditional: 5353, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8947, independent: 3323, independent conditional: 0, independent unconditional: 3323, dependent: 210, dependent conditional: 0, dependent unconditional: 210, unknown: 5414, unknown conditional: 0, unknown unconditional: 5414] , Statistics on independence cache: Total cache size (in pairs): 210, Positive cache size: 181, Positive conditional cache size: 0, Positive unconditional cache size: 181, Negative cache size: 29, Negative conditional cache size: 0, Negative unconditional cache size: 29, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 226 PlacesBefore, 68 PlacesAfterwards, 266 TransitionsBefore, 100 TransitionsAfterwards, 33228 CoEnabledTransitionPairs, 6 FixpointIterations, 35 TrivialSequentialCompositions, 145 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 30 ConcurrentYvCompositions, 8 ChoiceCompositions, 223 TotalNumberOfCompositions, 57444 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 28305, independent: 27868, independent conditional: 0, independent unconditional: 27868, dependent: 437, dependent conditional: 0, dependent unconditional: 437, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 16620, independent: 16512, independent conditional: 0, independent unconditional: 16512, dependent: 108, dependent conditional: 0, dependent unconditional: 108, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 28305, independent: 11356, independent conditional: 0, independent unconditional: 11356, dependent: 329, dependent conditional: 0, dependent unconditional: 329, unknown: 16620, unknown conditional: 0, unknown unconditional: 16620] , Statistics on independence cache: Total cache size (in pairs): 739, Positive cache size: 696, Positive conditional cache size: 0, Positive unconditional cache size: 696, Negative cache size: 43, Negative conditional cache size: 0, Negative unconditional cache size: 43, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 226 PlacesBefore, 68 PlacesAfterwards, 266 TransitionsBefore, 100 TransitionsAfterwards, 33228 CoEnabledTransitionPairs, 6 FixpointIterations, 35 TrivialSequentialCompositions, 138 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 28 ConcurrentYvCompositions, 8 ChoiceCompositions, 214 TotalNumberOfCompositions, 56798 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 24997, independent: 24552, independent conditional: 0, independent unconditional: 24552, dependent: 445, dependent conditional: 0, dependent unconditional: 445, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 16079, independent: 15973, independent conditional: 0, independent unconditional: 15973, dependent: 106, dependent conditional: 0, dependent unconditional: 106, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 24997, independent: 8579, independent conditional: 0, independent unconditional: 8579, dependent: 339, dependent conditional: 0, dependent unconditional: 339, unknown: 16079, unknown conditional: 0, unknown unconditional: 16079] , Statistics on independence cache: Total cache size (in pairs): 376, Positive cache size: 333, Positive conditional cache size: 0, Positive unconditional cache size: 333, Negative cache size: 43, Negative conditional cache size: 0, Negative unconditional cache size: 43, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1s, 287 PlacesBefore, 88 PlacesAfterwards, 339 TransitionsBefore, 131 TransitionsAfterwards, 65604 CoEnabledTransitionPairs, 6 FixpointIterations, 35 TrivialSequentialCompositions, 194 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 37 ConcurrentYvCompositions, 9 ChoiceCompositions, 280 TotalNumberOfCompositions, 111258 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 52800, independent: 52238, independent conditional: 0, independent unconditional: 52238, dependent: 562, dependent conditional: 0, dependent unconditional: 562, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 32210, independent: 32090, independent conditional: 0, independent unconditional: 32090, dependent: 120, dependent conditional: 0, dependent unconditional: 120, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 52800, independent: 20148, independent conditional: 0, independent unconditional: 20148, dependent: 442, dependent conditional: 0, dependent unconditional: 442, unknown: 32210, unknown conditional: 0, unknown unconditional: 32210] , Statistics on independence cache: Total cache size (in pairs): 814, Positive cache size: 757, Positive conditional cache size: 0, Positive unconditional cache size: 757, Negative cache size: 57, Negative conditional cache size: 0, Negative unconditional cache size: 57, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 929]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 929]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 222 locations, 4 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: 5.8s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 93 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 93 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 501 IncrementalHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 1 mSDtfsCounter, 501 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=4, InterpolantAutomatonStates: 31, 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, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 100 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 117 ConstructedInterpolants, 0 QuantifiedInterpolants, 321 SizeOfPredicates, 3 NumberOfNonLiveVariables, 526 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 23/58 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 281 locations, 5 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: 392.1s, OverallIterations: 23, TraceHistogramMax: 10, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 178.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: 215 mSolverCounterUnknown, 5094 SdHoareTripleChecker+Valid, 96.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5094 mSDsluCounter, 128 SdHoareTripleChecker+Invalid, 94.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 6734 IncrementalHoareTripleChecker+Unchecked, 123 mSDsCounter, 768 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13891 IncrementalHoareTripleChecker+Invalid, 21608 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 768 mSolverCounterUnsat, 5 mSDtfsCounter, 13891 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1434 GetRequests, 899 SyntacticMatches, 47 SemanticMatches, 488 ConstructedPredicates, 33 IntricatePredicates, 2 DeprecatedPredicates, 3284 ImplicationChecksByTransitivity, 233.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4453occurred in iteration=13, InterpolantAutomatonStates: 277, 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: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 201.6s InterpolantComputationTime, 1188 NumberOfCodeBlocks, 1164 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 1648 ConstructedInterpolants, 438 QuantifiedInterpolants, 36493 SizeOfPredicates, 171 NumberOfNonLiveVariables, 4773 ConjunctsInSsa, 688 ConjunctsInUnsatCore, 62 InterpolantComputations, 5 PerfectInterpolantSequences, 2849/3045 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 - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 340 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: 337.1s, OverallIterations: 9, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 283.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.2s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 2922 SdHoareTripleChecker+Valid, 15.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2922 mSDsluCounter, 98 SdHoareTripleChecker+Invalid, 14.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2393 IncrementalHoareTripleChecker+Unchecked, 77 mSDsCounter, 297 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7798 IncrementalHoareTripleChecker+Invalid, 10494 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 297 mSolverCounterUnsat, 21 mSDtfsCounter, 7798 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 341 GetRequests, 198 SyntacticMatches, 8 SemanticMatches, 135 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 45.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3671occurred in iteration=8, InterpolantAutomatonStates: 71, 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: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 47.0s InterpolantComputationTime, 304 NumberOfCodeBlocks, 300 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 399 ConstructedInterpolants, 77 QuantifiedInterpolants, 5741 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1286 ConjunctsInSsa, 154 ConjunctsInUnsatCore, 21 InterpolantComputations, 4 PerfectInterpolantSequences, 584/628 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 222 locations, 4 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: 3.3s, OverallIterations: 4, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 240 IncrementalHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 0 mSDtfsCounter, 240 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=3, InterpolantAutomatonStates: 21, 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 62 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 101 SizeOfPredicates, 0 NumberOfNonLiveVariables, 231 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 14/47 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 281 locations, 5 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: 5.2s, OverallIterations: 4, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 392 IncrementalHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 0 mSDtfsCounter, 392 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=218occurred in iteration=0, InterpolantAutomatonStates: 21, 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, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 136 SizeOfPredicates, 0 NumberOfNonLiveVariables, 269 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 56/89 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown !ENTRY org.eclipse.osgi 4 0 2023-01-28 08:24:29.784 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d68aaae61/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d68aaae61/.metadata/.log.