./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:11:32,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:11:32,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:11:32,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:11:32,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:11:32,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:11:32,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:11:32,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:11:32,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:11:32,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:11:32,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:11:32,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:11:32,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:11:32,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:11:32,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:11:32,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:11:32,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:11:32,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:11:32,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:11:32,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:11:32,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:11:32,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:11:32,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:11:32,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:11:32,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:11:32,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:11:32,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:11:32,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:11:32,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:11:32,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:11:32,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:11:32,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:11:32,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:11:32,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:11:32,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:11:32,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:11:32,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:11:32,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:11:32,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:11:32,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:11:32,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:11:32,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:11:32,475 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:11:32,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:11:32,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:11:32,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:11:32,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:11:32,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:11:32,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:11:32,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:11:32,478 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:11:32,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:11:32,480 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:11:32,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:11:32,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:11:32,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:11:32,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:11:32,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:11:32,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:11:32,481 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:11:32,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:11:32,481 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:11:32,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:11:32,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:11:32,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:11:32,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:11:32,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:11:32,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:11:32,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:11:32,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:11:32,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:11:32,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:11:32,483 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:11:32,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:11:32,483 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:11:32,483 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:11:32,483 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:11:32,484 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246cd07a930f0cb8d777c2eae74f25d04e3267c275b813f0c0f5232c23299340 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:11:32,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:11:32,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:11:32,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:11:32,827 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:11:32,828 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:11:32,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-08-30 18:11:33,868 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:11:34,079 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:11:34,080 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-08-30 18:11:34,112 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49369c03e/4b8b3cbaa97e4277851d5069769ac8fe/FLAG74a2d12b5 [2023-08-30 18:11:34,436 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49369c03e/4b8b3cbaa97e4277851d5069769ac8fe [2023-08-30 18:11:34,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:11:34,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:11:34,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:11:34,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:11:34,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:11:34,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@106eb40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34, skipping insertion in model container [2023-08-30 18:11:34,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:11:34,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:11:34,730 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_78-equ_racing.i[47038,47051] [2023-08-30 18:11:34,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:11:34,771 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:11:34,815 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_78-equ_racing.i[47038,47051] [2023-08-30 18:11:34,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:11:34,855 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:11:34,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34 WrapperNode [2023-08-30 18:11:34,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:11:34,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:11:34,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:11:34,857 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:11:34,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,903 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 204 [2023-08-30 18:11:34,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:11:34,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:11:34,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:11:34,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:11:34,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,925 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:11:34,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:11:34,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:11:34,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:11:34,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (1/1) ... [2023-08-30 18:11:34,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:11:34,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:34,951 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) [2023-08-30 18:11:34,977 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 [2023-08-30 18:11:34,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:11:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:11:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:11:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:11:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 18:11:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:11:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 18:11:34,998 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 18:11:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:11:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:11:34,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:11:35,000 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 18:11:35,116 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:11:35,117 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:11:35,358 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:11:35,364 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:11:35,364 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-08-30 18:11:35,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:11:35 BoogieIcfgContainer [2023-08-30 18:11:35,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:11:35,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:11:35,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:11:35,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:11:35,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:11:34" (1/3) ... [2023-08-30 18:11:35,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f2e01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:11:35, skipping insertion in model container [2023-08-30 18:11:35,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:34" (2/3) ... [2023-08-30 18:11:35,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f2e01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:11:35, skipping insertion in model container [2023-08-30 18:11:35,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:11:35" (3/3) ... [2023-08-30 18:11:35,371 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_78-equ_racing.i [2023-08-30 18:11:35,376 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:11:35,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:11:35,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-30 18:11:35,386 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:11:35,441 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 18:11:35,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 410 flow [2023-08-30 18:11:35,564 INFO L130 PetriNetUnfolder]: 43/271 cut-off events. [2023-08-30 18:11:35,564 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 18:11:35,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 271 events. 43/271 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 823 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-30 18:11:35,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 201 transitions, 410 flow [2023-08-30 18:11:35,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:35,589 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:35,594 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:35,596 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:35,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:35,620 INFO L130 PetriNetUnfolder]: 41/264 cut-off events. [2023-08-30 18:11:35,620 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:35,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 41/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 803 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-30 18:11:35,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 8664 [2023-08-30 18:11:41,352 INFO L134 LiptonReduction]: Checked pairs total: 18412 [2023-08-30 18:11:41,352 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-30 18:11:41,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:11:41,385 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=true, 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;@10dacd6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:11:41,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 18:11:41,394 INFO L130 PetriNetUnfolder]: 7/29 cut-off events. [2023-08-30 18:11:41,394 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:41,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:41,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 18:11:41,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:41,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:41,401 INFO L85 PathProgramCache]: Analyzing trace with hash 733617857, now seen corresponding path program 1 times [2023-08-30 18:11:41,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:41,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123543549] [2023-08-30 18:11:41,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:41,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:41,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:41,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123543549] [2023-08-30 18:11:41,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123543549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:41,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:41,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:11:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305368278] [2023-08-30 18:11:41,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:11:41,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:41,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:11:41,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:11:41,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 367 [2023-08-30 18:11:41,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 64 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:41,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:41,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 367 [2023-08-30 18:11:41,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:41,885 INFO L130 PetriNetUnfolder]: 274/651 cut-off events. [2023-08-30 18:11:41,886 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:41,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 651 events. 274/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3505 event pairs, 0 based on Foata normal form. 119/685 useless extension candidates. Maximal degree in co-relation 1175. Up to 529 conditions per place. [2023-08-30 18:11:41,892 INFO L137 encePairwiseOnDemand]: 342/367 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-30 18:11:41,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 225 flow [2023-08-30 18:11:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:11:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:11:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-08-30 18:11:41,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367847411444142 [2023-08-30 18:11:41,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-08-30 18:11:41,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-08-30 18:11:41,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:41,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-08-30 18:11:41,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:41,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:41,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:41,923 INFO L175 Difference]: Start difference. First operand has 44 places, 64 transitions, 133 flow. Second operand 3 states and 591 transitions. [2023-08-30 18:11:41,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 225 flow [2023-08-30 18:11:41,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:11:41,927 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 97 flow [2023-08-30 18:11:41,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-30 18:11:41,932 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-30 18:11:41,932 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 97 flow [2023-08-30 18:11:41,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:41,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:41,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:41,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:11:41,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:41,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash 423867485, now seen corresponding path program 1 times [2023-08-30 18:11:41,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:41,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463943998] [2023-08-30 18:11:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:41,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:42,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:42,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463943998] [2023-08-30 18:11:42,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463943998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:42,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:42,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:11:42,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385554579] [2023-08-30 18:11:42,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:42,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:11:42,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:42,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:11:42,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:11:42,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 367 [2023-08-30 18:11:42,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:42,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:42,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 367 [2023-08-30 18:11:42,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:42,410 INFO L130 PetriNetUnfolder]: 301/688 cut-off events. [2023-08-30 18:11:42,411 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 18:11:42,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1371 conditions, 688 events. 301/688 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3609 event pairs, 130 based on Foata normal form. 0/622 useless extension candidates. Maximal degree in co-relation 1355. Up to 367 conditions per place. [2023-08-30 18:11:42,412 INFO L137 encePairwiseOnDemand]: 361/367 looper letters, 37 selfloop transitions, 3 changer transitions 25/72 dead transitions. [2023-08-30 18:11:42,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 72 transitions, 290 flow [2023-08-30 18:11:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:11:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:11:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 717 transitions. [2023-08-30 18:11:42,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884196185286104 [2023-08-30 18:11:42,414 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 717 transitions. [2023-08-30 18:11:42,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 717 transitions. [2023-08-30 18:11:42,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:42,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 717 transitions. [2023-08-30 18:11:42,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:42,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:42,419 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:42,419 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 97 flow. Second operand 4 states and 717 transitions. [2023-08-30 18:11:42,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 72 transitions, 290 flow [2023-08-30 18:11:42,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 72 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 18:11:42,420 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 103 flow [2023-08-30 18:11:42,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-08-30 18:11:42,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2023-08-30 18:11:42,421 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 103 flow [2023-08-30 18:11:42,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:42,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:42,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:42,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 18:11:42,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:42,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:42,422 INFO L85 PathProgramCache]: Analyzing trace with hash 290818371, now seen corresponding path program 1 times [2023-08-30 18:11:42,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:42,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892954973] [2023-08-30 18:11:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:42,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:42,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:42,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892954973] [2023-08-30 18:11:42,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892954973] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:42,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260215471] [2023-08-30 18:11:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:42,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:42,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:42,478 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) [2023-08-30 18:11:42,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:11:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:42,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:11:42,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:43,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:43,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260215471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:43,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:43,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 18:11:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874757953] [2023-08-30 18:11:43,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:43,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:11:43,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:43,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:11:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:11:43,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 367 [2023-08-30 18:11:43,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 170.0) internal successors, (1020), 6 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:43,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:43,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 367 [2023-08-30 18:11:43,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:43,251 INFO L130 PetriNetUnfolder]: 32/89 cut-off events. [2023-08-30 18:11:43,251 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-08-30 18:11:43,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 89 events. 32/89 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 219 event pairs, 9 based on Foata normal form. 17/103 useless extension candidates. Maximal degree in co-relation 204. Up to 66 conditions per place. [2023-08-30 18:11:43,252 INFO L137 encePairwiseOnDemand]: 364/367 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-30 18:11:43,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 37 transitions, 165 flow [2023-08-30 18:11:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:11:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:11:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 708 transitions. [2023-08-30 18:11:43,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4822888283378747 [2023-08-30 18:11:43,254 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 708 transitions. [2023-08-30 18:11:43,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 708 transitions. [2023-08-30 18:11:43,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:43,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 708 transitions. [2023-08-30 18:11:43,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:43,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:43,258 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:43,258 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 103 flow. Second operand 4 states and 708 transitions. [2023-08-30 18:11:43,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 37 transitions, 165 flow [2023-08-30 18:11:43,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 37 transitions, 147 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 18:11:43,259 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-08-30 18:11:43,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-08-30 18:11:43,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -17 predicate places. [2023-08-30 18:11:43,259 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-08-30 18:11:43,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 170.0) internal successors, (1020), 6 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:43,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 18:11:43,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 18:11:43,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 18:11:43,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 18:11:43,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:43,467 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-30 18:11:43,469 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 18:11:43,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 410 flow [2023-08-30 18:11:43,498 INFO L130 PetriNetUnfolder]: 43/271 cut-off events. [2023-08-30 18:11:43,498 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 18:11:43,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 271 events. 43/271 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 823 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-30 18:11:43,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 201 transitions, 410 flow [2023-08-30 18:11:43,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:43,500 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:43,500 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:43,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:43,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 194 transitions, 393 flow [2023-08-30 18:11:43,513 INFO L130 PetriNetUnfolder]: 41/264 cut-off events. [2023-08-30 18:11:43,513 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:43,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 41/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 803 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-30 18:11:43,516 INFO L119 LiptonReduction]: Number of co-enabled transitions 8664 [2023-08-30 18:11:47,609 INFO L134 LiptonReduction]: Checked pairs total: 17867 [2023-08-30 18:11:47,609 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-30 18:11:47,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:11:47,611 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=true, 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;@10dacd6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:11:47,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 18:11:47,614 INFO L130 PetriNetUnfolder]: 15/48 cut-off events. [2023-08-30 18:11:47,614 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:47,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:47,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 18:11:47,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:11:47,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1729354892, now seen corresponding path program 1 times [2023-08-30 18:11:47,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:47,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32596353] [2023-08-30 18:11:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:47,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:11:47,625 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:11:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:11:47,641 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:11:47,642 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:11:47,642 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 18:11:47,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 18:11:47,642 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 18:11:47,643 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 18:11:47,643 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:11:47,643 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 18:11:47,659 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 18:11:47,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 260 transitions, 538 flow [2023-08-30 18:11:47,685 INFO L130 PetriNetUnfolder]: 72/424 cut-off events. [2023-08-30 18:11:47,685 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 18:11:47,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 72/424 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1596 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 273. Up to 12 conditions per place. [2023-08-30 18:11:47,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 260 transitions, 538 flow [2023-08-30 18:11:47,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 258 transitions, 534 flow [2023-08-30 18:11:47,689 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:47,689 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-30 18:11:47,689 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-30 18:11:47,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 258 transitions, 534 flow [2023-08-30 18:11:47,719 INFO L130 PetriNetUnfolder]: 71/422 cut-off events. [2023-08-30 18:11:47,720 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 18:11:47,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 422 events. 71/422 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1612 event pairs, 0 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2023-08-30 18:11:47,730 INFO L119 LiptonReduction]: Number of co-enabled transitions 25080 [2023-08-30 18:11:52,099 INFO L134 LiptonReduction]: Checked pairs total: 52594 [2023-08-30 18:11:52,100 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-30 18:11:52,101 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:11:52,101 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=true, 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;@10dacd6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:11:52,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 18:11:52,103 INFO L130 PetriNetUnfolder]: 6/23 cut-off events. [2023-08-30 18:11:52,103 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:52,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:52,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 18:11:52,104 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)] === [2023-08-30 18:11:52,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1384375003, now seen corresponding path program 1 times [2023-08-30 18:11:52,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:52,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881331577] [2023-08-30 18:11:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:52,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:52,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:52,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881331577] [2023-08-30 18:11:52,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881331577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:52,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:52,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:11:52,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077335347] [2023-08-30 18:11:52,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:52,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:11:52,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:52,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:11:52,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:11:52,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 462 [2023-08-30 18:11:52,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:52,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:52,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 462 [2023-08-30 18:11:52,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:52,905 INFO L130 PetriNetUnfolder]: 8903/13936 cut-off events. [2023-08-30 18:11:52,905 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2023-08-30 18:11:52,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26898 conditions, 13936 events. 8903/13936 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 93113 event pairs, 6020 based on Foata normal form. 3325/15003 useless extension candidates. Maximal degree in co-relation 11579. Up to 12844 conditions per place. [2023-08-30 18:11:52,943 INFO L137 encePairwiseOnDemand]: 428/462 looper letters, 66 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 18:11:52,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 320 flow [2023-08-30 18:11:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:11:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:11:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-30 18:11:52,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425685425685426 [2023-08-30 18:11:52,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-30 18:11:52,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-30 18:11:52,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:52,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-30 18:11:52,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 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) [2023-08-30 18:11:52,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:52,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:52,950 INFO L175 Difference]: Start difference. First operand has 67 places, 98 transitions, 214 flow. Second operand 3 states and 752 transitions. [2023-08-30 18:11:52,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 320 flow [2023-08-30 18:11:52,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:11:52,954 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 164 flow [2023-08-30 18:11:52,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-08-30 18:11:52,956 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-30 18:11:52,956 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 164 flow [2023-08-30 18:11:52,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:52,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:52,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:52,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 18:11:52,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:11:52,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:52,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1508875475, now seen corresponding path program 1 times [2023-08-30 18:11:52,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:52,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887973952] [2023-08-30 18:11:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:52,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:53,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:53,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887973952] [2023-08-30 18:11:53,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887973952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:53,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:53,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:11:53,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820064443] [2023-08-30 18:11:53,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:53,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:11:53,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:11:53,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:11:53,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 462 [2023-08-30 18:11:53,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:53,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:53,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 462 [2023-08-30 18:11:53,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:54,196 INFO L130 PetriNetUnfolder]: 10858/17603 cut-off events. [2023-08-30 18:11:54,196 INFO L131 PetriNetUnfolder]: For 754/754 co-relation queries the response was YES. [2023-08-30 18:11:54,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35008 conditions, 17603 events. 10858/17603 cut-off events. For 754/754 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 128189 event pairs, 3224 based on Foata normal form. 0/15413 useless extension candidates. Maximal degree in co-relation 34900. Up to 10872 conditions per place. [2023-08-30 18:11:54,239 INFO L137 encePairwiseOnDemand]: 449/462 looper letters, 115 selfloop transitions, 12 changer transitions 8/150 dead transitions. [2023-08-30 18:11:54,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 150 transitions, 626 flow [2023-08-30 18:11:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:11:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:11:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 961 transitions. [2023-08-30 18:11:54,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.520021645021645 [2023-08-30 18:11:54,243 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 961 transitions. [2023-08-30 18:11:54,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 961 transitions. [2023-08-30 18:11:54,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:54,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 961 transitions. [2023-08-30 18:11:54,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 240.25) internal successors, (961), 4 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:54,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:54,248 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:54,249 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 164 flow. Second operand 4 states and 961 transitions. [2023-08-30 18:11:54,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 150 transitions, 626 flow [2023-08-30 18:11:54,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 150 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:11:54,253 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 262 flow [2023-08-30 18:11:54,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2023-08-30 18:11:54,254 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-30 18:11:54,254 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 262 flow [2023-08-30 18:11:54,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:54,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:54,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:54,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 18:11:54,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:11:54,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 283198393, now seen corresponding path program 1 times [2023-08-30 18:11:54,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:54,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638261055] [2023-08-30 18:11:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:54,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:54,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:54,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638261055] [2023-08-30 18:11:54,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638261055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:54,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107147709] [2023-08-30 18:11:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:54,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:54,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:54,302 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) [2023-08-30 18:11:54,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:11:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:54,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:11:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:54,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:54,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107147709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:54,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:54,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 18:11:54,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488904852] [2023-08-30 18:11:54,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:54,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:11:54,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:54,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:11:54,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:11:54,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 462 [2023-08-30 18:11:54,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:54,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:54,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 462 [2023-08-30 18:11:54,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:54,628 INFO L130 PetriNetUnfolder]: 1284/2474 cut-off events. [2023-08-30 18:11:54,628 INFO L131 PetriNetUnfolder]: For 1050/1050 co-relation queries the response was YES. [2023-08-30 18:11:54,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6228 conditions, 2474 events. 1284/2474 cut-off events. For 1050/1050 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15959 event pairs, 34 based on Foata normal form. 296/2674 useless extension candidates. Maximal degree in co-relation 2262. Up to 1557 conditions per place. [2023-08-30 18:11:54,634 INFO L137 encePairwiseOnDemand]: 459/462 looper letters, 66 selfloop transitions, 3 changer transitions 22/100 dead transitions. [2023-08-30 18:11:54,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 100 transitions, 506 flow [2023-08-30 18:11:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:11:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:11:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1146 transitions. [2023-08-30 18:11:54,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4961038961038961 [2023-08-30 18:11:54,638 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1146 transitions. [2023-08-30 18:11:54,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1146 transitions. [2023-08-30 18:11:54,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:54,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1146 transitions. [2023-08-30 18:11:54,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.2) internal successors, (1146), 5 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:54,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 462.0) internal successors, (2772), 6 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:54,647 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 462.0) internal successors, (2772), 6 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:54,647 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 262 flow. Second operand 5 states and 1146 transitions. [2023-08-30 18:11:54,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 100 transitions, 506 flow [2023-08-30 18:11:54,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 100 transitions, 504 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 18:11:54,652 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 128 flow [2023-08-30 18:11:54,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-08-30 18:11:54,654 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-30 18:11:54,654 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 128 flow [2023-08-30 18:11:54,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:54,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:54,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:54,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:54,876 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,SelfDestructingSolverStorable6 [2023-08-30 18:11:54,876 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)] === [2023-08-30 18:11:54,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:54,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1390837300, now seen corresponding path program 1 times [2023-08-30 18:11:54,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:54,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035417079] [2023-08-30 18:11:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:54,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:55,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:55,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035417079] [2023-08-30 18:11:55,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035417079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:55,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925825154] [2023-08-30 18:11:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:55,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:55,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:55,019 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) [2023-08-30 18:11:55,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 18:11:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:55,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 18:11:55,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:55,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:11:55,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:11:55,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:11:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:55,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:11:55,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925825154] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:55,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:11:55,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-30 18:11:55,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941114826] [2023-08-30 18:11:55,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:55,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:11:55,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:55,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:11:55,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:11:55,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 462 [2023-08-30 18:11:55,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 195.8) internal successors, (979), 5 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:55,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 462 [2023-08-30 18:11:55,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:55,342 INFO L130 PetriNetUnfolder]: 508/968 cut-off events. [2023-08-30 18:11:55,342 INFO L131 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2023-08-30 18:11:55,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2462 conditions, 968 events. 508/968 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4846 event pairs, 177 based on Foata normal form. 108/989 useless extension candidates. Maximal degree in co-relation 949. Up to 592 conditions per place. [2023-08-30 18:11:55,346 INFO L137 encePairwiseOnDemand]: 451/462 looper letters, 33 selfloop transitions, 11 changer transitions 2/52 dead transitions. [2023-08-30 18:11:55,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 259 flow [2023-08-30 18:11:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:11:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:11:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 822 transitions. [2023-08-30 18:11:55,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2023-08-30 18:11:55,348 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 822 transitions. [2023-08-30 18:11:55,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 822 transitions. [2023-08-30 18:11:55,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:55,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 822 transitions. [2023-08-30 18:11:55,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.5) internal successors, (822), 4 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,352 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,352 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 128 flow. Second operand 4 states and 822 transitions. [2023-08-30 18:11:55,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 259 flow [2023-08-30 18:11:55,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 242 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-30 18:11:55,355 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 137 flow [2023-08-30 18:11:55,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-08-30 18:11:55,356 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -14 predicate places. [2023-08-30 18:11:55,356 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 137 flow [2023-08-30 18:11:55,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.8) internal successors, (979), 5 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:55,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:55,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:55,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:55,562 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:11:55,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash -445906667, now seen corresponding path program 1 times [2023-08-30 18:11:55,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:55,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500019638] [2023-08-30 18:11:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:55,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:55,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:55,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500019638] [2023-08-30 18:11:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500019638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:55,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:55,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:11:55,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32402247] [2023-08-30 18:11:55,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:55,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:11:55,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:55,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:11:55,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:11:55,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 462 [2023-08-30 18:11:55,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:55,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 462 [2023-08-30 18:11:55,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:55,754 INFO L130 PetriNetUnfolder]: 351/808 cut-off events. [2023-08-30 18:11:55,755 INFO L131 PetriNetUnfolder]: For 400/400 co-relation queries the response was YES. [2023-08-30 18:11:55,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1985 conditions, 808 events. 351/808 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4733 event pairs, 86 based on Foata normal form. 33/784 useless extension candidates. Maximal degree in co-relation 930. Up to 394 conditions per place. [2023-08-30 18:11:55,758 INFO L137 encePairwiseOnDemand]: 454/462 looper letters, 41 selfloop transitions, 8 changer transitions 5/63 dead transitions. [2023-08-30 18:11:55,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 63 transitions, 324 flow [2023-08-30 18:11:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:11:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:11:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 657 transitions. [2023-08-30 18:11:55,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2023-08-30 18:11:55,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 657 transitions. [2023-08-30 18:11:55,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 657 transitions. [2023-08-30 18:11:55,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:55,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 657 transitions. [2023-08-30 18:11:55,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,764 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 137 flow. Second operand 3 states and 657 transitions. [2023-08-30 18:11:55,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 63 transitions, 324 flow [2023-08-30 18:11:55,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 18:11:55,766 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 168 flow [2023-08-30 18:11:55,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-30 18:11:55,766 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -13 predicate places. [2023-08-30 18:11:55,766 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 168 flow [2023-08-30 18:11:55,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:55,767 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:55,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 18:11:55,767 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)] === [2023-08-30 18:11:55,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:55,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1289784363, now seen corresponding path program 2 times [2023-08-30 18:11:55,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:55,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22765180] [2023-08-30 18:11:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:55,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:11:55,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:55,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22765180] [2023-08-30 18:11:55,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22765180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:55,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:55,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 18:11:55,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978570960] [2023-08-30 18:11:55,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:55,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:11:55,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:55,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:11:55,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 18:11:55,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 462 [2023-08-30 18:11:55,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:55,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 462 [2023-08-30 18:11:55,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:55,988 INFO L130 PetriNetUnfolder]: 101/292 cut-off events. [2023-08-30 18:11:55,989 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-08-30 18:11:55,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 292 events. 101/292 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1280 event pairs, 38 based on Foata normal form. 30/305 useless extension candidates. Maximal degree in co-relation 431. Up to 220 conditions per place. [2023-08-30 18:11:55,990 INFO L137 encePairwiseOnDemand]: 457/462 looper letters, 30 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-08-30 18:11:55,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 44 transitions, 235 flow [2023-08-30 18:11:55,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:11:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:11:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 835 transitions. [2023-08-30 18:11:55,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518398268398268 [2023-08-30 18:11:55,992 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 835 transitions. [2023-08-30 18:11:55,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 835 transitions. [2023-08-30 18:11:55,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:55,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 835 transitions. [2023-08-30 18:11:55,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.75) internal successors, (835), 4 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,997 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,997 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 168 flow. Second operand 4 states and 835 transitions. [2023-08-30 18:11:55,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 44 transitions, 235 flow [2023-08-30 18:11:55,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 208 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 18:11:55,998 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 129 flow [2023-08-30 18:11:55,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-08-30 18:11:55,999 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -13 predicate places. [2023-08-30 18:11:55,999 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 129 flow [2023-08-30 18:11:55,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:55,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:55,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:56,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 18:11:56,000 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)] === [2023-08-30 18:11:56,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:56,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1896164585, now seen corresponding path program 1 times [2023-08-30 18:11:56,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:56,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043170968] [2023-08-30 18:11:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:56,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:56,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:56,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043170968] [2023-08-30 18:11:56,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043170968] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:56,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379534747] [2023-08-30 18:11:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:56,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:56,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:56,249 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) [2023-08-30 18:11:56,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 18:11:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:56,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:11:56,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:56,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:11:56,476 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:11:56,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 118 [2023-08-30 18:11:56,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:11:56,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:11:56,554 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 19 treesize of output 11 [2023-08-30 18:11:56,579 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 19 treesize of output 11 [2023-08-30 18:11:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:56,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:56,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379534747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:56,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:56,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 18:11:56,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094745968] [2023-08-30 18:11:56,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:56,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:11:56,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:11:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=113, Unknown=5, NotChecked=0, Total=156 [2023-08-30 18:11:56,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 462 [2023-08-30 18:11:56,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 129 flow. Second operand has 13 states, 13 states have (on average 170.46153846153845) internal successors, (2216), 13 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:56,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:56,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 462 [2023-08-30 18:11:56,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:57,121 INFO L130 PetriNetUnfolder]: 97/322 cut-off events. [2023-08-30 18:11:57,122 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-08-30 18:11:57,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 322 events. 97/322 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1535 event pairs, 28 based on Foata normal form. 4/308 useless extension candidates. Maximal degree in co-relation 317. Up to 128 conditions per place. [2023-08-30 18:11:57,122 INFO L137 encePairwiseOnDemand]: 453/462 looper letters, 42 selfloop transitions, 11 changer transitions 18/80 dead transitions. [2023-08-30 18:11:57,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 403 flow [2023-08-30 18:11:57,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:11:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:11:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1908 transitions. [2023-08-30 18:11:57,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754427390791027 [2023-08-30 18:11:57,127 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1908 transitions. [2023-08-30 18:11:57,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1908 transitions. [2023-08-30 18:11:57,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:57,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1908 transitions. [2023-08-30 18:11:57,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 173.45454545454547) internal successors, (1908), 11 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) [2023-08-30 18:11:57,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 462.0) internal successors, (5544), 12 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:57,135 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 462.0) internal successors, (5544), 12 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:57,135 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 129 flow. Second operand 11 states and 1908 transitions. [2023-08-30 18:11:57,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 403 flow [2023-08-30 18:11:57,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 383 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 18:11:57,137 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 187 flow [2023-08-30 18:11:57,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=187, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2023-08-30 18:11:57,137 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2023-08-30 18:11:57,137 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 187 flow [2023-08-30 18:11:57,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.46153846153845) internal successors, (2216), 13 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:57,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:57,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:57,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 18:11:57,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:57,343 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)] === [2023-08-30 18:11:57,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:57,343 INFO L85 PathProgramCache]: Analyzing trace with hash -403373324, now seen corresponding path program 1 times [2023-08-30 18:11:57,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:57,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396292368] [2023-08-30 18:11:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:57,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:57,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396292368] [2023-08-30 18:11:57,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396292368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591345414] [2023-08-30 18:11:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:57,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:57,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:57,527 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) [2023-08-30 18:11:57,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 18:11:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:57,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:11:57,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:57,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:11:57,721 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:11:57,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 118 [2023-08-30 18:11:57,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:11:57,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:11:57,794 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 19 treesize of output 11 [2023-08-30 18:11:57,822 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 19 treesize of output 11 [2023-08-30 18:11:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:57,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:11:57,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591345414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:57,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:57,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 18:11:57,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171219151] [2023-08-30 18:11:57,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:57,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:11:57,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:11:57,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=117, Unknown=1, NotChecked=0, Total=156 [2023-08-30 18:11:58,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 462 [2023-08-30 18:11:58,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 187 flow. Second operand has 13 states, 13 states have (on average 171.30769230769232) internal successors, (2227), 13 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:58,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:58,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 462 [2023-08-30 18:11:58,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:58,545 INFO L130 PetriNetUnfolder]: 138/446 cut-off events. [2023-08-30 18:11:58,545 INFO L131 PetriNetUnfolder]: For 335/335 co-relation queries the response was YES. [2023-08-30 18:11:58,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1198 conditions, 446 events. 138/446 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2443 event pairs, 44 based on Foata normal form. 6/428 useless extension candidates. Maximal degree in co-relation 1181. Up to 160 conditions per place. [2023-08-30 18:11:58,547 INFO L137 encePairwiseOnDemand]: 453/462 looper letters, 69 selfloop transitions, 16 changer transitions 10/104 dead transitions. [2023-08-30 18:11:58,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 104 transitions, 606 flow [2023-08-30 18:11:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:11:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:11:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1933 transitions. [2023-08-30 18:11:58,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.380362062180244 [2023-08-30 18:11:58,551 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1933 transitions. [2023-08-30 18:11:58,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1933 transitions. [2023-08-30 18:11:58,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:58,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1933 transitions. [2023-08-30 18:11:58,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 175.72727272727272) internal successors, (1933), 11 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:58,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 462.0) internal successors, (5544), 12 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:58,559 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 462.0) internal successors, (5544), 12 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:58,559 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 187 flow. Second operand 11 states and 1933 transitions. [2023-08-30 18:11:58,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 104 transitions, 606 flow [2023-08-30 18:11:58,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 104 transitions, 580 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-30 18:11:58,561 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 274 flow [2023-08-30 18:11:58,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=274, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-30 18:11:58,562 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2023-08-30 18:11:58,562 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 274 flow [2023-08-30 18:11:58,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.30769230769232) internal successors, (2227), 13 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:58,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:58,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:58,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 18:11:58,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 18:11:58,768 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)] === [2023-08-30 18:11:58,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:58,768 INFO L85 PathProgramCache]: Analyzing trace with hash -280300716, now seen corresponding path program 2 times [2023-08-30 18:11:58,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:58,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226878624] [2023-08-30 18:11:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:58,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:58,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:58,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226878624] [2023-08-30 18:11:58,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226878624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:58,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283951472] [2023-08-30 18:11:58,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:11:58,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:58,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:58,969 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) [2023-08-30 18:11:58,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 18:11:59,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:11:59,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:11:59,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:11:59,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:59,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:11:59,140 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:11:59,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 118 [2023-08-30 18:11:59,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:11:59,207 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 19 treesize of output 11 [2023-08-30 18:11:59,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:11:59,253 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 19 treesize of output 11 [2023-08-30 18:11:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:59,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:59,299 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_435 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_435) |c_~#B~0.base|) |c_~#B~0.offset|) 1)) (forall ((v_ArrVal_435 (Array Int Int))) (<= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_435) |c_~#B~0.base|) |c_~#B~0.offset|)))) is different from false [2023-08-30 18:11:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 18:11:59,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283951472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:59,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:59,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 18:11:59,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706662420] [2023-08-30 18:11:59,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:59,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 18:11:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:59,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 18:11:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=140, Unknown=1, NotChecked=24, Total=210 [2023-08-30 18:11:59,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 462 [2023-08-30 18:11:59,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 274 flow. Second operand has 15 states, 15 states have (on average 169.8) internal successors, (2547), 15 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:59,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:59,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 462 [2023-08-30 18:11:59,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:59,559 INFO L130 PetriNetUnfolder]: 134/435 cut-off events. [2023-08-30 18:11:59,559 INFO L131 PetriNetUnfolder]: For 370/370 co-relation queries the response was YES. [2023-08-30 18:11:59,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 435 events. 134/435 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2409 event pairs, 60 based on Foata normal form. 3/411 useless extension candidates. Maximal degree in co-relation 1114. Up to 179 conditions per place. [2023-08-30 18:11:59,560 INFO L137 encePairwiseOnDemand]: 454/462 looper letters, 25 selfloop transitions, 2 changer transitions 48/80 dead transitions. [2023-08-30 18:11:59,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 513 flow [2023-08-30 18:11:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:11:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:11:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1216 transitions. [2023-08-30 18:11:59,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37600494743351887 [2023-08-30 18:11:59,563 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1216 transitions. [2023-08-30 18:11:59,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1216 transitions. [2023-08-30 18:11:59,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:59,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1216 transitions. [2023-08-30 18:11:59,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.71428571428572) internal successors, (1216), 7 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:59,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 462.0) internal successors, (3696), 8 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:59,569 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 462.0) internal successors, (3696), 8 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:59,569 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 274 flow. Second operand 7 states and 1216 transitions. [2023-08-30 18:11:59,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 513 flow [2023-08-30 18:11:59,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 469 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-08-30 18:11:59,571 INFO L231 Difference]: Finished difference. Result has 74 places, 31 transitions, 123 flow [2023-08-30 18:11:59,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=123, PETRI_PLACES=74, PETRI_TRANSITIONS=31} [2023-08-30 18:11:59,572 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 7 predicate places. [2023-08-30 18:11:59,573 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 31 transitions, 123 flow [2023-08-30 18:11:59,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 169.8) internal successors, (2547), 15 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:11:59,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:59,573 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:59,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:59,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:59,779 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)] === [2023-08-30 18:11:59,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:59,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1871294106, now seen corresponding path program 2 times [2023-08-30 18:11:59,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:59,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860515831] [2023-08-30 18:11:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:59,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:12:00,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:00,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860515831] [2023-08-30 18:12:00,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860515831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:00,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:00,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:12:00,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798175632] [2023-08-30 18:12:00,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:00,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:12:00,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:00,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:12:00,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:12:00,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 462 [2023-08-30 18:12:00,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 31 transitions, 123 flow. Second operand has 7 states, 7 states have (on average 204.85714285714286) internal successors, (1434), 7 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:00,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:00,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 462 [2023-08-30 18:12:00,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:00,289 INFO L130 PetriNetUnfolder]: 33/128 cut-off events. [2023-08-30 18:12:00,290 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 18:12:00,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 128 events. 33/128 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 399 event pairs, 26 based on Foata normal form. 1/128 useless extension candidates. Maximal degree in co-relation 331. Up to 75 conditions per place. [2023-08-30 18:12:00,290 INFO L137 encePairwiseOnDemand]: 455/462 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-30 18:12:00,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 34 transitions, 191 flow [2023-08-30 18:12:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:12:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:12:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1439 transitions. [2023-08-30 18:12:00,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44495980210265923 [2023-08-30 18:12:00,293 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1439 transitions. [2023-08-30 18:12:00,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1439 transitions. [2023-08-30 18:12:00,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:00,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1439 transitions. [2023-08-30 18:12:00,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:00,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 462.0) internal successors, (3696), 8 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:00,299 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 462.0) internal successors, (3696), 8 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:00,299 INFO L175 Difference]: Start difference. First operand has 74 places, 31 transitions, 123 flow. Second operand 7 states and 1439 transitions. [2023-08-30 18:12:00,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 34 transitions, 191 flow [2023-08-30 18:12:00,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 34 transitions, 175 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 18:12:00,300 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-08-30 18:12:00,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-08-30 18:12:00,301 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -20 predicate places. [2023-08-30 18:12:00,301 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-08-30 18:12:00,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 204.85714285714286) internal successors, (1434), 7 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:00,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 18:12:00,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 18:12:00,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 18:12:00,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 18:12:00,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 18:12:00,302 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1] [2023-08-30 18:12:00,303 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 18:12:00,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 260 transitions, 538 flow [2023-08-30 18:12:00,332 INFO L130 PetriNetUnfolder]: 72/424 cut-off events. [2023-08-30 18:12:00,333 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 18:12:00,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 72/424 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1596 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 273. Up to 12 conditions per place. [2023-08-30 18:12:00,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 260 transitions, 538 flow [2023-08-30 18:12:00,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 258 transitions, 534 flow [2023-08-30 18:12:00,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:12:00,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-30 18:12:00,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-30 18:12:00,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 258 transitions, 534 flow [2023-08-30 18:12:00,358 INFO L130 PetriNetUnfolder]: 71/422 cut-off events. [2023-08-30 18:12:00,358 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 18:12:00,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 422 events. 71/422 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1612 event pairs, 0 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2023-08-30 18:12:00,366 INFO L119 LiptonReduction]: Number of co-enabled transitions 25080 [2023-08-30 18:12:04,672 INFO L134 LiptonReduction]: Checked pairs total: 51640 [2023-08-30 18:12:04,672 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-30 18:12:04,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:12:04,673 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=true, 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;@10dacd6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:12:04,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 18:12:04,677 INFO L130 PetriNetUnfolder]: 37/109 cut-off events. [2023-08-30 18:12:04,678 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:12:04,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:04,678 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 18:12:04,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:12:04,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash -899889064, now seen corresponding path program 1 times [2023-08-30 18:12:04,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:04,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746477820] [2023-08-30 18:12:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:04,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:12:04,686 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:12:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:12:04,701 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:12:04,701 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:12:04,701 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 18:12:04,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 18:12:04,701 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 18:12:04,702 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 18:12:04,702 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:12:04,702 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 18:12:04,725 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 18:12:04,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 319 transitions, 668 flow [2023-08-30 18:12:04,790 INFO L130 PetriNetUnfolder]: 106/608 cut-off events. [2023-08-30 18:12:04,790 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 18:12:04,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 608 events. 106/608 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2559 event pairs, 1 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-08-30 18:12:04,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 319 transitions, 668 flow [2023-08-30 18:12:04,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 317 transitions, 664 flow [2023-08-30 18:12:04,797 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:12:04,797 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 317 transitions, 664 flow [2023-08-30 18:12:04,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 317 transitions, 664 flow [2023-08-30 18:12:04,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 317 transitions, 664 flow [2023-08-30 18:12:04,842 INFO L130 PetriNetUnfolder]: 105/606 cut-off events. [2023-08-30 18:12:04,842 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 18:12:04,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 606 events. 105/606 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2552 event pairs, 1 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 430. Up to 16 conditions per place. [2023-08-30 18:12:04,855 INFO L119 LiptonReduction]: Number of co-enabled transitions 47880 [2023-08-30 18:12:09,028 INFO L134 LiptonReduction]: Checked pairs total: 102829 [2023-08-30 18:12:09,029 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-08-30 18:12:09,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:12:09,031 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=true, 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;@10dacd6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:12:09,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 18:12:09,033 INFO L130 PetriNetUnfolder]: 7/26 cut-off events. [2023-08-30 18:12:09,033 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:12:09,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:09,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 18:12:09,034 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)] === [2023-08-30 18:12:09,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2124670951, now seen corresponding path program 1 times [2023-08-30 18:12:09,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:09,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619768803] [2023-08-30 18:12:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:09,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:09,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:09,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619768803] [2023-08-30 18:12:09,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619768803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:09,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:09,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:12:09,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758611231] [2023-08-30 18:12:09,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:09,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:12:09,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:09,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:12:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:12:09,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 563 [2023-08-30 18:12:09,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 128 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:09,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:09,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 563 [2023-08-30 18:12:09,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:22,438 INFO L130 PetriNetUnfolder]: 187412/264993 cut-off events. [2023-08-30 18:12:22,438 INFO L131 PetriNetUnfolder]: For 3111/3111 co-relation queries the response was YES. [2023-08-30 18:12:22,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511940 conditions, 264993 events. 187412/264993 cut-off events. For 3111/3111 co-relation queries the response was YES. Maximal size of possible extension queue 7504. Compared 2103639 event pairs, 115799 based on Foata normal form. 66267/288155 useless extension candidates. Maximal degree in co-relation 25663. Up to 244876 conditions per place. [2023-08-30 18:12:23,864 INFO L137 encePairwiseOnDemand]: 519/563 looper letters, 82 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-30 18:12:23,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 104 transitions, 406 flow [2023-08-30 18:12:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:12:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:12:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-08-30 18:12:23,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405565423327413 [2023-08-30 18:12:23,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-08-30 18:12:23,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-08-30 18:12:23,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:23,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-08-30 18:12:23,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:23,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:23,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:23,870 INFO L175 Difference]: Start difference. First operand has 87 places, 128 transitions, 286 flow. Second operand 3 states and 913 transitions. [2023-08-30 18:12:23,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 104 transitions, 406 flow [2023-08-30 18:12:23,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 104 transitions, 406 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:12:23,874 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 216 flow [2023-08-30 18:12:23,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2023-08-30 18:12:23,874 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-30 18:12:23,874 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 216 flow [2023-08-30 18:12:23,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:23,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:23,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:23,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 18:12:23,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:12:23,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1929137805, now seen corresponding path program 1 times [2023-08-30 18:12:23,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:23,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528745734] [2023-08-30 18:12:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:23,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:23,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:23,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528745734] [2023-08-30 18:12:23,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528745734] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:23,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:23,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:12:23,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122653842] [2023-08-30 18:12:23,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:23,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:12:23,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:23,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:12:23,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:12:24,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 563 [2023-08-30 18:12:24,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 250.75) internal successors, (1003), 4 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:24,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:24,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 563 [2023-08-30 18:12:24,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:42,519 INFO L130 PetriNetUnfolder]: 260867/369664 cut-off events. [2023-08-30 18:12:42,519 INFO L131 PetriNetUnfolder]: For 14388/14388 co-relation queries the response was YES. [2023-08-30 18:12:43,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734054 conditions, 369664 events. 260867/369664 cut-off events. For 14388/14388 co-relation queries the response was YES. Maximal size of possible extension queue 11564. Compared 3049194 event pairs, 62003 based on Foata normal form. 0/324793 useless extension candidates. Maximal degree in co-relation 733940. Up to 225337 conditions per place. [2023-08-30 18:12:44,064 INFO L137 encePairwiseOnDemand]: 546/563 looper letters, 157 selfloop transitions, 18 changer transitions 0/195 dead transitions. [2023-08-30 18:12:44,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 195 transitions, 828 flow [2023-08-30 18:12:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:12:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:12:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1175 transitions. [2023-08-30 18:12:44,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217584369449378 [2023-08-30 18:12:44,066 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1175 transitions. [2023-08-30 18:12:44,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1175 transitions. [2023-08-30 18:12:44,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:44,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1175 transitions. [2023-08-30 18:12:44,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.75) internal successors, (1175), 4 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:44,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:44,071 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:44,071 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 216 flow. Second operand 4 states and 1175 transitions. [2023-08-30 18:12:44,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 195 transitions, 828 flow [2023-08-30 18:12:44,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 195 transitions, 825 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:12:44,078 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 358 flow [2023-08-30 18:12:44,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=358, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2023-08-30 18:12:44,078 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 8 predicate places. [2023-08-30 18:12:44,078 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 358 flow [2023-08-30 18:12:44,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 250.75) internal successors, (1003), 4 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:44,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:44,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:44,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 18:12:44,079 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:12:44,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:44,079 INFO L85 PathProgramCache]: Analyzing trace with hash -804210261, now seen corresponding path program 1 times [2023-08-30 18:12:44,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:44,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117007693] [2023-08-30 18:12:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:44,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:44,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:44,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117007693] [2023-08-30 18:12:44,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117007693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:44,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196003092] [2023-08-30 18:12:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:44,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:44,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:44,106 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) [2023-08-30 18:12:44,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 18:12:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:44,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:12:44,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:44,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:44,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196003092] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:44,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:44,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-30 18:12:44,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588093695] [2023-08-30 18:12:44,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:44,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:12:44,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:44,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:12:44,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:12:44,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 563 [2023-08-30 18:12:44,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 358 flow. Second operand has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:44,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:44,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 563 [2023-08-30 18:12:44,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:47,249 INFO L130 PetriNetUnfolder]: 34538/53421 cut-off events. [2023-08-30 18:12:47,249 INFO L131 PetriNetUnfolder]: For 30988/30988 co-relation queries the response was YES. [2023-08-30 18:12:47,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137698 conditions, 53421 events. 34538/53421 cut-off events. For 30988/30988 co-relation queries the response was YES. Maximal size of possible extension queue 2175. Compared 422718 event pairs, 1119 based on Foata normal form. 4795/55765 useless extension candidates. Maximal degree in co-relation 39534. Up to 33949 conditions per place. [2023-08-30 18:12:47,447 INFO L137 encePairwiseOnDemand]: 560/563 looper letters, 163 selfloop transitions, 4 changer transitions 2/183 dead transitions. [2023-08-30 18:12:47,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 183 transitions, 961 flow [2023-08-30 18:12:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:12:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:12:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1688 transitions. [2023-08-30 18:12:47,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4997039668442866 [2023-08-30 18:12:47,450 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1688 transitions. [2023-08-30 18:12:47,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1688 transitions. [2023-08-30 18:12:47,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:47,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1688 transitions. [2023-08-30 18:12:47,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 281.3333333333333) internal successors, (1688), 6 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:47,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:47,463 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:47,463 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 358 flow. Second operand 6 states and 1688 transitions. [2023-08-30 18:12:47,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 183 transitions, 961 flow [2023-08-30 18:12:47,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 183 transitions, 955 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 18:12:47,481 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 267 flow [2023-08-30 18:12:47,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2023-08-30 18:12:47,481 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2023-08-30 18:12:47,481 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 267 flow [2023-08-30 18:12:47,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:47,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:47,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:47,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 18:12:47,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:47,687 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)] === [2023-08-30 18:12:47,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:47,688 INFO L85 PathProgramCache]: Analyzing trace with hash -671050181, now seen corresponding path program 1 times [2023-08-30 18:12:47,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:47,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53831616] [2023-08-30 18:12:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:47,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:47,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:47,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53831616] [2023-08-30 18:12:47,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53831616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:47,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439398039] [2023-08-30 18:12:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:47,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:47,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:47,757 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) [2023-08-30 18:12:47,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 18:12:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:47,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 18:12:47,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:47,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 18:12:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:12:47,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:47,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:12:47,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439398039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:47,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:12:47,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-30 18:12:47,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023040398] [2023-08-30 18:12:47,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:12:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:12:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:12:47,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 563 [2023-08-30 18:12:47,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:47,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:47,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 563 [2023-08-30 18:12:47,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:49,554 INFO L130 PetriNetUnfolder]: 17110/27138 cut-off events. [2023-08-30 18:12:49,555 INFO L131 PetriNetUnfolder]: For 15050/15050 co-relation queries the response was YES. [2023-08-30 18:12:49,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68050 conditions, 27138 events. 17110/27138 cut-off events. For 15050/15050 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 201199 event pairs, 4786 based on Foata normal form. 4278/29136 useless extension candidates. Maximal degree in co-relation 15772. Up to 17984 conditions per place. [2023-08-30 18:12:49,661 INFO L137 encePairwiseOnDemand]: 544/563 looper letters, 65 selfloop transitions, 19 changer transitions 2/95 dead transitions. [2023-08-30 18:12:49,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 95 transitions, 505 flow [2023-08-30 18:12:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:12:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:12:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1002 transitions. [2023-08-30 18:12:49,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44493783303730017 [2023-08-30 18:12:49,663 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1002 transitions. [2023-08-30 18:12:49,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1002 transitions. [2023-08-30 18:12:49,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:49,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1002 transitions. [2023-08-30 18:12:49,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 250.5) internal successors, (1002), 4 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:49,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:49,669 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:49,669 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 267 flow. Second operand 4 states and 1002 transitions. [2023-08-30 18:12:49,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 95 transitions, 505 flow [2023-08-30 18:12:49,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 95 transitions, 490 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 18:12:49,675 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 284 flow [2023-08-30 18:12:49,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2023-08-30 18:12:49,676 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2023-08-30 18:12:49,676 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 284 flow [2023-08-30 18:12:49,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:49,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:49,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:49,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 18:12:49,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:49,881 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)] === [2023-08-30 18:12:49,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1522724399, now seen corresponding path program 1 times [2023-08-30 18:12:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:49,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21565034] [2023-08-30 18:12:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:49,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21565034] [2023-08-30 18:12:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21565034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437194592] [2023-08-30 18:12:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:49,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:49,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:49,974 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) [2023-08-30 18:12:49,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 18:12:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:50,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 18:12:50,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:50,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-30 18:12:50,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:12:50,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 18:12:50,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:12:50,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 18:12:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:50,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:50,144 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_642 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_642) |c_~#A~0.base|) (+ |c_~#A~0.offset| 12)) 0))) is different from false [2023-08-30 18:12:50,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:12:50,157 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 23 treesize of output 24 [2023-08-30 18:12:50,160 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 39 treesize of output 27 [2023-08-30 18:12:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:50,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437194592] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:50,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:50,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-30 18:12:50,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665929234] [2023-08-30 18:12:50,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:50,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 18:12:50,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 18:12:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=45, Unknown=1, NotChecked=14, Total=90 [2023-08-30 18:12:50,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 563 [2023-08-30 18:12:50,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 284 flow. Second operand has 10 states, 10 states have (on average 216.5) internal successors, (2165), 10 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:50,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:50,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 563 [2023-08-30 18:12:50,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:50,354 INFO L130 PetriNetUnfolder]: 947/2293 cut-off events. [2023-08-30 18:12:50,355 INFO L131 PetriNetUnfolder]: For 1321/1321 co-relation queries the response was YES. [2023-08-30 18:12:50,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6341 conditions, 2293 events. 947/2293 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 16470 event pairs, 79 based on Foata normal form. 742/2942 useless extension candidates. Maximal degree in co-relation 4029. Up to 1886 conditions per place. [2023-08-30 18:12:50,361 INFO L137 encePairwiseOnDemand]: 556/563 looper letters, 62 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2023-08-30 18:12:50,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 440 flow [2023-08-30 18:12:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:12:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:12:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 912 transitions. [2023-08-30 18:12:50,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4049733570159858 [2023-08-30 18:12:50,363 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 912 transitions. [2023-08-30 18:12:50,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 912 transitions. [2023-08-30 18:12:50,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:50,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 912 transitions. [2023-08-30 18:12:50,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:50,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:50,367 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 563.0) internal successors, (2815), 5 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:50,367 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 284 flow. Second operand 4 states and 912 transitions. [2023-08-30 18:12:50,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 440 flow [2023-08-30 18:12:50,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 78 transitions, 402 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 18:12:50,370 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 242 flow [2023-08-30 18:12:50,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2023-08-30 18:12:50,371 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -8 predicate places. [2023-08-30 18:12:50,371 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 242 flow [2023-08-30 18:12:50,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.5) internal successors, (2165), 10 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:50,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:50,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:50,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 18:12:50,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:50,573 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)] === [2023-08-30 18:12:50,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2009762394, now seen corresponding path program 1 times [2023-08-30 18:12:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:50,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192195008] [2023-08-30 18:12:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:50,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:50,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:50,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192195008] [2023-08-30 18:12:50,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192195008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:50,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668690480] [2023-08-30 18:12:50,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:50,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:50,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:50,746 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) [2023-08-30 18:12:50,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 18:12:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:50,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:12:50,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:51,134 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:12:51,135 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 138 treesize of output 141 [2023-08-30 18:12:51,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 126 treesize of output 126 [2023-08-30 18:12:51,164 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:12:51,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 128 [2023-08-30 18:12:51,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:51,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:51,258 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 19 treesize of output 11 [2023-08-30 18:12:51,288 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 19 treesize of output 11 [2023-08-30 18:12:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:51,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:51,329 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_712 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_712) |c_~#B~0.base|) |c_~#B~0.offset|) 0)) is different from false [2023-08-30 18:12:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-30 18:12:51,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668690480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:51,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:51,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 18:12:51,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059373715] [2023-08-30 18:12:51,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:51,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:12:51,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:51,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:12:51,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=100, Unknown=1, NotChecked=20, Total=156 [2023-08-30 18:12:51,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 563 [2023-08-30 18:12:51,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 242 flow. Second operand has 13 states, 13 states have (on average 210.30769230769232) internal successors, (2734), 13 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:51,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:51,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 563 [2023-08-30 18:12:51,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:51,890 INFO L130 PetriNetUnfolder]: 1153/3033 cut-off events. [2023-08-30 18:12:51,890 INFO L131 PetriNetUnfolder]: For 1798/1798 co-relation queries the response was YES. [2023-08-30 18:12:51,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7877 conditions, 3033 events. 1153/3033 cut-off events. For 1798/1798 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 24297 event pairs, 322 based on Foata normal form. 28/2931 useless extension candidates. Maximal degree in co-relation 4054. Up to 1079 conditions per place. [2023-08-30 18:12:51,900 INFO L137 encePairwiseOnDemand]: 549/563 looper letters, 153 selfloop transitions, 24 changer transitions 14/204 dead transitions. [2023-08-30 18:12:51,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 204 transitions, 1130 flow [2023-08-30 18:12:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 18:12:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 18:12:51,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3278 transitions. [2023-08-30 18:12:51,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881586737714624 [2023-08-30 18:12:51,906 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3278 transitions. [2023-08-30 18:12:51,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3278 transitions. [2023-08-30 18:12:51,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:51,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3278 transitions. [2023-08-30 18:12:51,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 218.53333333333333) internal successors, (3278), 15 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:51,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 563.0) internal successors, (9008), 16 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:51,919 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 563.0) internal successors, (9008), 16 states have internal predecessors, (9008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:51,919 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 242 flow. Second operand 15 states and 3278 transitions. [2023-08-30 18:12:51,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 204 transitions, 1130 flow [2023-08-30 18:12:51,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 204 transitions, 1106 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 18:12:51,924 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 437 flow [2023-08-30 18:12:51,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=437, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2023-08-30 18:12:51,924 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 13 predicate places. [2023-08-30 18:12:51,924 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 437 flow [2023-08-30 18:12:51,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 210.30769230769232) internal successors, (2734), 13 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:51,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:51,925 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:51,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 18:12:52,130 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,SelfDestructingSolverStorable20 [2023-08-30 18:12:52,130 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)] === [2023-08-30 18:12:52,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2036307991, now seen corresponding path program 1 times [2023-08-30 18:12:52,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:52,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103852069] [2023-08-30 18:12:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:52,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:52,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103852069] [2023-08-30 18:12:52,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103852069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:52,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929287847] [2023-08-30 18:12:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:52,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:52,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:52,316 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) [2023-08-30 18:12:52,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 18:12:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:52,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:12:52,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:52,543 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:12:52,543 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 138 treesize of output 141 [2023-08-30 18:12:52,559 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:12:52,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:12:52,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:12:52,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:52,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:52,649 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 19 treesize of output 11 [2023-08-30 18:12:52,677 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 19 treesize of output 11 [2023-08-30 18:12:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:52,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:52,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929287847] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:52,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:52,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 18:12:52,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881964258] [2023-08-30 18:12:52,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:52,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:12:52,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:52,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:12:52,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=115, Unknown=3, NotChecked=0, Total=156 [2023-08-30 18:12:53,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 563 [2023-08-30 18:12:53,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 437 flow. Second operand has 13 states, 13 states have (on average 210.30769230769232) internal successors, (2734), 13 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:53,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:53,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 563 [2023-08-30 18:12:53,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:53,635 INFO L130 PetriNetUnfolder]: 1399/3711 cut-off events. [2023-08-30 18:12:53,635 INFO L131 PetriNetUnfolder]: For 11085/11085 co-relation queries the response was YES. [2023-08-30 18:12:53,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12429 conditions, 3711 events. 1399/3711 cut-off events. For 11085/11085 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 31222 event pairs, 455 based on Foata normal form. 26/3577 useless extension candidates. Maximal degree in co-relation 12075. Up to 1585 conditions per place. [2023-08-30 18:12:53,645 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 151 selfloop transitions, 24 changer transitions 14/202 dead transitions. [2023-08-30 18:12:53,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 202 transitions, 1312 flow [2023-08-30 18:12:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 18:12:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 18:12:53,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2851 transitions. [2023-08-30 18:12:53,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953408935646944 [2023-08-30 18:12:53,648 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2851 transitions. [2023-08-30 18:12:53,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2851 transitions. [2023-08-30 18:12:53,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:53,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2851 transitions. [2023-08-30 18:12:53,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 219.30769230769232) internal successors, (2851), 13 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:53,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 563.0) internal successors, (7882), 14 states have internal predecessors, (7882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:53,655 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 563.0) internal successors, (7882), 14 states have internal predecessors, (7882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:53,655 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 437 flow. Second operand 13 states and 2851 transitions. [2023-08-30 18:12:53,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 202 transitions, 1312 flow [2023-08-30 18:12:53,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 202 transitions, 1290 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 18:12:53,663 INFO L231 Difference]: Finished difference. Result has 113 places, 104 transitions, 665 flow [2023-08-30 18:12:53,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=665, PETRI_PLACES=113, PETRI_TRANSITIONS=104} [2023-08-30 18:12:53,663 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 26 predicate places. [2023-08-30 18:12:53,663 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 104 transitions, 665 flow [2023-08-30 18:12:53,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 210.30769230769232) internal successors, (2734), 13 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:53,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:53,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:53,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 18:12:53,868 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,SelfDestructingSolverStorable21 [2023-08-30 18:12:53,868 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)] === [2023-08-30 18:12:53,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:53,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1798766152, now seen corresponding path program 2 times [2023-08-30 18:12:53,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:53,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570807318] [2023-08-30 18:12:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:53,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:12:54,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570807318] [2023-08-30 18:12:54,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570807318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319314483] [2023-08-30 18:12:54,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:12:54,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:54,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:54,120 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) [2023-08-30 18:12:54,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 18:12:54,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:12:54,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:12:54,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 18:12:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:54,359 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:12:54,359 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 138 treesize of output 141 [2023-08-30 18:12:54,374 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:12:54,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:12:54,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:12:54,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:54,448 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 19 treesize of output 11 [2023-08-30 18:12:54,485 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 19 treesize of output 11 [2023-08-30 18:12:54,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:54,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:54,588 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_864 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_~#B~0.base| (store (select |c_#memory_int| |c_~#B~0.base|) |c_~#B~0.offset| |c_t_funThread1of3ForFork0_#t~post7#1|)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_864) |c_~#B~0.base|) |c_~#B~0.offset|) 0)) is different from false [2023-08-30 18:12:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 18:12:54,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319314483] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:54,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:54,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 16 [2023-08-30 18:12:54,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026308808] [2023-08-30 18:12:54,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:54,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:12:54,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:54,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:12:54,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=218, Unknown=7, NotChecked=30, Total=306 [2023-08-30 18:12:54,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 563 [2023-08-30 18:12:54,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 104 transitions, 665 flow. Second operand has 18 states, 18 states have (on average 204.94444444444446) internal successors, (3689), 18 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:54,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:54,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 563 [2023-08-30 18:12:54,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:55,480 INFO L130 PetriNetUnfolder]: 1477/3957 cut-off events. [2023-08-30 18:12:55,480 INFO L131 PetriNetUnfolder]: For 23922/23923 co-relation queries the response was YES. [2023-08-30 18:12:55,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15211 conditions, 3957 events. 1477/3957 cut-off events. For 23922/23923 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 33521 event pairs, 374 based on Foata normal form. 14/3801 useless extension candidates. Maximal degree in co-relation 14900. Up to 1431 conditions per place. [2023-08-30 18:12:55,491 INFO L137 encePairwiseOnDemand]: 548/563 looper letters, 162 selfloop transitions, 45 changer transitions 17/237 dead transitions. [2023-08-30 18:12:55,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 237 transitions, 1828 flow [2023-08-30 18:12:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 18:12:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 18:12:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3000 transitions. [2023-08-30 18:12:55,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806140573458513 [2023-08-30 18:12:55,494 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3000 transitions. [2023-08-30 18:12:55,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3000 transitions. [2023-08-30 18:12:55,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:55,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3000 transitions. [2023-08-30 18:12:55,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 214.28571428571428) internal successors, (3000), 14 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:55,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 563.0) internal successors, (8445), 15 states have internal predecessors, (8445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:55,501 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 563.0) internal successors, (8445), 15 states have internal predecessors, (8445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:55,501 INFO L175 Difference]: Start difference. First operand has 113 places, 104 transitions, 665 flow. Second operand 14 states and 3000 transitions. [2023-08-30 18:12:55,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 237 transitions, 1828 flow [2023-08-30 18:12:55,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 237 transitions, 1780 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-08-30 18:12:55,512 INFO L231 Difference]: Finished difference. Result has 128 places, 127 transitions, 913 flow [2023-08-30 18:12:55,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=913, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2023-08-30 18:12:55,513 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 41 predicate places. [2023-08-30 18:12:55,513 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 913 flow [2023-08-30 18:12:55,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 204.94444444444446) internal successors, (3689), 18 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:55,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:55,513 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:55,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 18:12:55,729 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,SelfDestructingSolverStorable22 [2023-08-30 18:12:55,729 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)] === [2023-08-30 18:12:55,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:55,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1766495012, now seen corresponding path program 2 times [2023-08-30 18:12:55,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:55,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165196888] [2023-08-30 18:12:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:55,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:12:55,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:55,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165196888] [2023-08-30 18:12:55,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165196888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:55,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987238398] [2023-08-30 18:12:55,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:12:55,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:55,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:55,931 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) [2023-08-30 18:12:55,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 18:12:56,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:12:56,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:12:56,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 18:12:56,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:56,169 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:12:56,169 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 138 treesize of output 141 [2023-08-30 18:12:56,184 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:12:56,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:12:56,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:12:56,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:56,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:56,281 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 19 treesize of output 11 [2023-08-30 18:12:56,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:56,320 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 19 treesize of output 11 [2023-08-30 18:12:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:12:56,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:56,357 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_941 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_941) |c_~#B~0.base|) |c_~#B~0.offset|) 1)) (forall ((v_ArrVal_941 (Array Int Int))) (<= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_941) |c_~#B~0.base|) |c_~#B~0.offset|)))) is different from false [2023-08-30 18:12:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2023-08-30 18:12:56,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987238398] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:56,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:56,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 18:12:56,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81993870] [2023-08-30 18:12:56,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:56,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 18:12:56,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:56,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 18:12:56,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=140, Unknown=1, NotChecked=24, Total=210 [2023-08-30 18:12:56,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 563 [2023-08-30 18:12:56,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 913 flow. Second operand has 15 states, 15 states have (on average 209.73333333333332) internal successors, (3146), 15 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:56,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:56,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 563 [2023-08-30 18:12:56,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:56,958 INFO L130 PetriNetUnfolder]: 1388/3806 cut-off events. [2023-08-30 18:12:56,958 INFO L131 PetriNetUnfolder]: For 24274/24274 co-relation queries the response was YES. [2023-08-30 18:12:56,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15037 conditions, 3806 events. 1388/3806 cut-off events. For 24274/24274 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 32383 event pairs, 630 based on Foata normal form. 11/3650 useless extension candidates. Maximal degree in co-relation 14589. Up to 1507 conditions per place. [2023-08-30 18:12:56,973 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 136 selfloop transitions, 22 changer transitions 20/191 dead transitions. [2023-08-30 18:12:56,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 191 transitions, 1639 flow [2023-08-30 18:12:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:12:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:12:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1562 transitions. [2023-08-30 18:12:56,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963461050494798 [2023-08-30 18:12:56,975 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1562 transitions. [2023-08-30 18:12:56,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1562 transitions. [2023-08-30 18:12:56,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:56,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1562 transitions. [2023-08-30 18:12:56,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 223.14285714285714) internal successors, (1562), 7 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:56,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 563.0) internal successors, (4504), 8 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:56,978 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 563.0) internal successors, (4504), 8 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:56,979 INFO L175 Difference]: Start difference. First operand has 128 places, 127 transitions, 913 flow. Second operand 7 states and 1562 transitions. [2023-08-30 18:12:56,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 191 transitions, 1639 flow [2023-08-30 18:12:56,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 191 transitions, 1584 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 18:12:56,997 INFO L231 Difference]: Finished difference. Result has 134 places, 124 transitions, 900 flow [2023-08-30 18:12:56,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=900, PETRI_PLACES=134, PETRI_TRANSITIONS=124} [2023-08-30 18:12:56,997 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 47 predicate places. [2023-08-30 18:12:56,997 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 124 transitions, 900 flow [2023-08-30 18:12:56,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 209.73333333333332) internal successors, (3146), 15 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:56,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:56,998 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:57,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 18:12:57,202 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,SelfDestructingSolverStorable23 [2023-08-30 18:12:57,202 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:12:57,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:57,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1423626499, now seen corresponding path program 1 times [2023-08-30 18:12:57,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:57,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295191673] [2023-08-30 18:12:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:57,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:12:57,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:57,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295191673] [2023-08-30 18:12:57,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295191673] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:57,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521561979] [2023-08-30 18:12:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:57,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:57,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:57,434 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) [2023-08-30 18:12:57,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 18:12:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:57,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 18:12:57,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:57,634 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:12:57,635 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 138 treesize of output 141 [2023-08-30 18:12:57,651 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:12:57,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:12:57,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:12:57,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:57,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:57,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:57,742 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 19 treesize of output 11 [2023-08-30 18:12:57,770 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 19 treesize of output 11 [2023-08-30 18:12:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:12:57,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:12:57,799 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1018 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1018) |c_~#B~0.base|) |c_~#B~0.offset|) 0)) is different from false [2023-08-30 18:12:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-30 18:12:57,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521561979] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:12:57,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:12:57,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 18:12:57,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588027870] [2023-08-30 18:12:57,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:12:57,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 18:12:57,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:57,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 18:12:57,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=100, Unknown=1, NotChecked=20, Total=156 [2023-08-30 18:12:57,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 563 [2023-08-30 18:12:57,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 124 transitions, 900 flow. Second operand has 13 states, 13 states have (on average 210.69230769230768) internal successors, (2739), 13 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:57,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:57,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 563 [2023-08-30 18:12:57,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:58,250 INFO L130 PetriNetUnfolder]: 1162/3256 cut-off events. [2023-08-30 18:12:58,250 INFO L131 PetriNetUnfolder]: For 21580/21580 co-relation queries the response was YES. [2023-08-30 18:12:58,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13043 conditions, 3256 events. 1162/3256 cut-off events. For 21580/21580 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 26638 event pairs, 415 based on Foata normal form. 16/3125 useless extension candidates. Maximal degree in co-relation 12593. Up to 1832 conditions per place. [2023-08-30 18:12:58,263 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 155 selfloop transitions, 22 changer transitions 18/208 dead transitions. [2023-08-30 18:12:58,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 208 transitions, 1745 flow [2023-08-30 18:12:58,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 18:12:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 18:12:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2414 transitions. [2023-08-30 18:12:58,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897949297594058 [2023-08-30 18:12:58,266 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2414 transitions. [2023-08-30 18:12:58,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2414 transitions. [2023-08-30 18:12:58,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:58,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2414 transitions. [2023-08-30 18:12:58,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 219.45454545454547) internal successors, (2414), 11 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:58,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:58,271 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 563.0) internal successors, (6756), 12 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:58,271 INFO L175 Difference]: Start difference. First operand has 134 places, 124 transitions, 900 flow. Second operand 11 states and 2414 transitions. [2023-08-30 18:12:58,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 208 transitions, 1745 flow [2023-08-30 18:12:58,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 208 transitions, 1706 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 18:12:58,286 INFO L231 Difference]: Finished difference. Result has 145 places, 140 transitions, 1157 flow [2023-08-30 18:12:58,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1157, PETRI_PLACES=145, PETRI_TRANSITIONS=140} [2023-08-30 18:12:58,286 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 58 predicate places. [2023-08-30 18:12:58,286 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 140 transitions, 1157 flow [2023-08-30 18:12:58,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 210.69230769230768) internal successors, (2739), 13 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:58,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:58,287 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:58,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 18:12:58,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:58,491 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:12:58,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:58,491 INFO L85 PathProgramCache]: Analyzing trace with hash -83043722, now seen corresponding path program 2 times [2023-08-30 18:12:58,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:58,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801766404] [2023-08-30 18:12:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:58,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-30 18:12:58,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:58,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801766404] [2023-08-30 18:12:58,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801766404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:58,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:58,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 18:12:58,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827025559] [2023-08-30 18:12:58,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:58,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:12:58,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:58,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:12:58,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:12:58,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 563 [2023-08-30 18:12:58,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 140 transitions, 1157 flow. Second operand has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:58,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:58,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 563 [2023-08-30 18:12:58,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:12:59,251 INFO L130 PetriNetUnfolder]: 1145/3276 cut-off events. [2023-08-30 18:12:59,251 INFO L131 PetriNetUnfolder]: For 24348/24352 co-relation queries the response was YES. [2023-08-30 18:12:59,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13567 conditions, 3276 events. 1145/3276 cut-off events. For 24348/24352 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 27033 event pairs, 506 based on Foata normal form. 4/3129 useless extension candidates. Maximal degree in co-relation 13241. Up to 1745 conditions per place. [2023-08-30 18:12:59,265 INFO L137 encePairwiseOnDemand]: 553/563 looper letters, 122 selfloop transitions, 21 changer transitions 15/171 dead transitions. [2023-08-30 18:12:59,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 171 transitions, 1597 flow [2023-08-30 18:12:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:12:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:12:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1802 transitions. [2023-08-30 18:12:59,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457244354224816 [2023-08-30 18:12:59,267 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1802 transitions. [2023-08-30 18:12:59,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1802 transitions. [2023-08-30 18:12:59,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:12:59,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1802 transitions. [2023-08-30 18:12:59,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 257.42857142857144) internal successors, (1802), 7 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:59,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 563.0) internal successors, (4504), 8 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:59,271 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 563.0) internal successors, (4504), 8 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:59,271 INFO L175 Difference]: Start difference. First operand has 145 places, 140 transitions, 1157 flow. Second operand 7 states and 1802 transitions. [2023-08-30 18:12:59,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 171 transitions, 1597 flow [2023-08-30 18:12:59,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 171 transitions, 1475 flow, removed 61 selfloop flow, removed 0 redundant places. [2023-08-30 18:12:59,291 INFO L231 Difference]: Finished difference. Result has 154 places, 135 transitions, 1058 flow [2023-08-30 18:12:59,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1058, PETRI_PLACES=154, PETRI_TRANSITIONS=135} [2023-08-30 18:12:59,292 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 67 predicate places. [2023-08-30 18:12:59,292 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 135 transitions, 1058 flow [2023-08-30 18:12:59,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:12:59,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:59,292 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:59,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 18:12:59,293 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:12:59,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:59,293 INFO L85 PathProgramCache]: Analyzing trace with hash 48609122, now seen corresponding path program 1 times [2023-08-30 18:12:59,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:59,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410160093] [2023-08-30 18:12:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:59,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:12:59,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:59,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410160093] [2023-08-30 18:12:59,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410160093] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:12:59,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946738563] [2023-08-30 18:12:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:59,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:12:59,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:12:59,627 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) [2023-08-30 18:12:59,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 18:12:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:59,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 18:12:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:12:59,847 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:12:59,848 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 138 treesize of output 141 [2023-08-30 18:12:59,863 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:12:59,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:12:59,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:12:59,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:59,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:59,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:12:59,978 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 19 treesize of output 11 [2023-08-30 18:13:00,008 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 19 treesize of output 11 [2023-08-30 18:13:00,050 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 19 treesize of output 11 [2023-08-30 18:13:00,073 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 19 treesize of output 11 [2023-08-30 18:13:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:00,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:00,138 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1165 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1165) |c_~#B~0.base|) |c_~#B~0.offset|) 0)) is different from false [2023-08-30 18:13:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-30 18:13:00,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946738563] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:00,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:00,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 18:13:00,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305738578] [2023-08-30 18:13:00,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:00,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 18:13:00,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:00,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 18:13:00,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2023-08-30 18:13:00,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 563 [2023-08-30 18:13:00,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 135 transitions, 1058 flow. Second operand has 17 states, 17 states have (on average 206.94117647058823) internal successors, (3518), 17 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:00,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:00,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 563 [2023-08-30 18:13:00,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:00,779 INFO L130 PetriNetUnfolder]: 773/2173 cut-off events. [2023-08-30 18:13:00,779 INFO L131 PetriNetUnfolder]: For 13941/13943 co-relation queries the response was YES. [2023-08-30 18:13:00,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8803 conditions, 2173 events. 773/2173 cut-off events. For 13941/13943 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 15954 event pairs, 171 based on Foata normal form. 6/2081 useless extension candidates. Maximal degree in co-relation 8609. Up to 845 conditions per place. [2023-08-30 18:13:00,790 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 198 selfloop transitions, 74 changer transitions 13/298 dead transitions. [2023-08-30 18:13:00,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 298 transitions, 2801 flow [2023-08-30 18:13:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 18:13:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 18:13:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4865 transitions. [2023-08-30 18:13:00,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37570468762066567 [2023-08-30 18:13:00,795 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4865 transitions. [2023-08-30 18:13:00,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4865 transitions. [2023-08-30 18:13:00,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:00,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4865 transitions. [2023-08-30 18:13:00,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 211.52173913043478) internal successors, (4865), 23 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:00,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 563.0) internal successors, (13512), 24 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:00,806 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 563.0) internal successors, (13512), 24 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:00,806 INFO L175 Difference]: Start difference. First operand has 154 places, 135 transitions, 1058 flow. Second operand 23 states and 4865 transitions. [2023-08-30 18:13:00,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 298 transitions, 2801 flow [2023-08-30 18:13:00,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 298 transitions, 2691 flow, removed 27 selfloop flow, removed 8 redundant places. [2023-08-30 18:13:00,823 INFO L231 Difference]: Finished difference. Result has 169 places, 169 transitions, 1598 flow [2023-08-30 18:13:00,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1598, PETRI_PLACES=169, PETRI_TRANSITIONS=169} [2023-08-30 18:13:00,823 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 82 predicate places. [2023-08-30 18:13:00,824 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 169 transitions, 1598 flow [2023-08-30 18:13:00,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 206.94117647058823) internal successors, (3518), 17 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:00,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:00,824 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:00,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 18:13:01,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 18:13:01,038 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:01,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:01,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1520017161, now seen corresponding path program 1 times [2023-08-30 18:13:01,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:01,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918922288] [2023-08-30 18:13:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:01,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:01,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:01,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918922288] [2023-08-30 18:13:01,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918922288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:01,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021317927] [2023-08-30 18:13:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:01,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:01,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:01,305 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) [2023-08-30 18:13:01,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 18:13:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:01,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 18:13:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:01,524 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:01,524 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 141 [2023-08-30 18:13:01,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 126 treesize of output 126 [2023-08-30 18:13:01,545 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:01,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 128 [2023-08-30 18:13:01,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:01,604 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 14 treesize of output 16 [2023-08-30 18:13:01,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:01,658 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 19 treesize of output 11 [2023-08-30 18:13:01,687 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 19 treesize of output 11 [2023-08-30 18:13:01,717 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 19 treesize of output 11 [2023-08-30 18:13:01,740 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 19 treesize of output 11 [2023-08-30 18:13:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:01,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:01,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021317927] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:01,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:01,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 18:13:01,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134445327] [2023-08-30 18:13:01,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:01,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 18:13:01,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:01,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 18:13:01,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=216, Unknown=5, NotChecked=0, Total=272 [2023-08-30 18:13:02,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 563 [2023-08-30 18:13:02,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 169 transitions, 1598 flow. Second operand has 17 states, 17 states have (on average 207.1764705882353) internal successors, (3522), 17 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:02,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:02,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 563 [2023-08-30 18:13:02,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:02,697 INFO L130 PetriNetUnfolder]: 808/2329 cut-off events. [2023-08-30 18:13:02,697 INFO L131 PetriNetUnfolder]: For 17370/17376 co-relation queries the response was YES. [2023-08-30 18:13:02,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9955 conditions, 2329 events. 808/2329 cut-off events. For 17370/17376 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 17539 event pairs, 213 based on Foata normal form. 10/2236 useless extension candidates. Maximal degree in co-relation 9466. Up to 1238 conditions per place. [2023-08-30 18:13:02,712 INFO L137 encePairwiseOnDemand]: 549/563 looper letters, 195 selfloop transitions, 67 changer transitions 29/304 dead transitions. [2023-08-30 18:13:02,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 304 transitions, 3112 flow [2023-08-30 18:13:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 18:13:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 18:13:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 5256 transitions. [2023-08-30 18:13:02,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37342806394316164 [2023-08-30 18:13:02,718 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 5256 transitions. [2023-08-30 18:13:02,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 5256 transitions. [2023-08-30 18:13:02,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:02,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 5256 transitions. [2023-08-30 18:13:02,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 210.24) internal successors, (5256), 25 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:02,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 563.0) internal successors, (14638), 26 states have internal predecessors, (14638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:02,733 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 563.0) internal successors, (14638), 26 states have internal predecessors, (14638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:02,733 INFO L175 Difference]: Start difference. First operand has 169 places, 169 transitions, 1598 flow. Second operand 25 states and 5256 transitions. [2023-08-30 18:13:02,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 304 transitions, 3112 flow [2023-08-30 18:13:02,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 304 transitions, 2651 flow, removed 213 selfloop flow, removed 6 redundant places. [2023-08-30 18:13:02,783 INFO L231 Difference]: Finished difference. Result has 196 places, 189 transitions, 1692 flow [2023-08-30 18:13:02,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1692, PETRI_PLACES=196, PETRI_TRANSITIONS=189} [2023-08-30 18:13:02,783 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 109 predicate places. [2023-08-30 18:13:02,783 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 189 transitions, 1692 flow [2023-08-30 18:13:02,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 207.1764705882353) internal successors, (3522), 17 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:02,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:02,784 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:02,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-30 18:13:02,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 18:13:02,989 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:02,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:02,989 INFO L85 PathProgramCache]: Analyzing trace with hash 960878142, now seen corresponding path program 1 times [2023-08-30 18:13:02,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:02,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827677123] [2023-08-30 18:13:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:02,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:03,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:03,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827677123] [2023-08-30 18:13:03,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827677123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:03,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450568920] [2023-08-30 18:13:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:03,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:03,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:03,277 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) [2023-08-30 18:13:03,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 18:13:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:03,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 18:13:03,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:03,493 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:03,493 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 138 treesize of output 141 [2023-08-30 18:13:03,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 126 treesize of output 126 [2023-08-30 18:13:03,513 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:03,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 128 [2023-08-30 18:13:03,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:03,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:03,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:03,602 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 19 treesize of output 11 [2023-08-30 18:13:03,632 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 19 treesize of output 11 [2023-08-30 18:13:03,668 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 19 treesize of output 11 [2023-08-30 18:13:03,693 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 19 treesize of output 11 [2023-08-30 18:13:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:03,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:03,746 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1395 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1395) |c_~#B~0.base|) |c_~#B~0.offset|) 0)) is different from false [2023-08-30 18:13:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-30 18:13:03,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450568920] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:03,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:03,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 18:13:03,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385027745] [2023-08-30 18:13:03,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:03,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 18:13:03,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:03,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 18:13:03,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2023-08-30 18:13:03,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 563 [2023-08-30 18:13:03,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 189 transitions, 1692 flow. Second operand has 17 states, 17 states have (on average 207.0) internal successors, (3519), 17 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:03,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:03,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 563 [2023-08-30 18:13:03,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:04,335 INFO L130 PetriNetUnfolder]: 847/2472 cut-off events. [2023-08-30 18:13:04,335 INFO L131 PetriNetUnfolder]: For 12265/12265 co-relation queries the response was YES. [2023-08-30 18:13:04,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9998 conditions, 2472 events. 847/2472 cut-off events. For 12265/12265 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 19015 event pairs, 270 based on Foata normal form. 6/2369 useless extension candidates. Maximal degree in co-relation 9831. Up to 1417 conditions per place. [2023-08-30 18:13:04,348 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 208 selfloop transitions, 48 changer transitions 32/301 dead transitions. [2023-08-30 18:13:04,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 301 transitions, 2964 flow [2023-08-30 18:13:04,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 18:13:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 18:13:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4835 transitions. [2023-08-30 18:13:04,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3733879064020388 [2023-08-30 18:13:04,352 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4835 transitions. [2023-08-30 18:13:04,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4835 transitions. [2023-08-30 18:13:04,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:04,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4835 transitions. [2023-08-30 18:13:04,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 210.2173913043478) internal successors, (4835), 23 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:04,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 563.0) internal successors, (13512), 24 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:04,363 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 563.0) internal successors, (13512), 24 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:04,363 INFO L175 Difference]: Start difference. First operand has 196 places, 189 transitions, 1692 flow. Second operand 23 states and 4835 transitions. [2023-08-30 18:13:04,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 301 transitions, 2964 flow [2023-08-30 18:13:04,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 301 transitions, 2788 flow, removed 70 selfloop flow, removed 10 redundant places. [2023-08-30 18:13:04,391 INFO L231 Difference]: Finished difference. Result has 214 places, 202 transitions, 1877 flow [2023-08-30 18:13:04,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1877, PETRI_PLACES=214, PETRI_TRANSITIONS=202} [2023-08-30 18:13:04,392 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 127 predicate places. [2023-08-30 18:13:04,392 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 202 transitions, 1877 flow [2023-08-30 18:13:04,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 207.0) internal successors, (3519), 17 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:04,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:04,392 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:04,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 18:13:04,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 18:13:04,597 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:04,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:04,597 INFO L85 PathProgramCache]: Analyzing trace with hash 846364677, now seen corresponding path program 2 times [2023-08-30 18:13:04,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:04,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308271099] [2023-08-30 18:13:04,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:04,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:04,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:04,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308271099] [2023-08-30 18:13:04,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308271099] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:04,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110717571] [2023-08-30 18:13:04,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:13:04,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:04,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:04,922 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) [2023-08-30 18:13:04,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 18:13:05,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:13:05,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:13:05,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 18:13:05,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:05,154 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:05,154 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 138 treesize of output 141 [2023-08-30 18:13:05,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 126 treesize of output 126 [2023-08-30 18:13:05,174 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:05,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 128 [2023-08-30 18:13:05,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:05,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:05,254 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 19 treesize of output 11 [2023-08-30 18:13:05,291 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 19 treesize of output 11 [2023-08-30 18:13:05,307 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 14 treesize of output 16 [2023-08-30 18:13:05,348 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 19 treesize of output 11 [2023-08-30 18:13:05,384 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 19 treesize of output 11 [2023-08-30 18:13:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:05,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:05,425 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1514 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1514) |c_~#B~0.base|) |c_~#B~0.offset|) 0)) is different from false [2023-08-30 18:13:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2023-08-30 18:13:05,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110717571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:05,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:05,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2023-08-30 18:13:05,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110171441] [2023-08-30 18:13:05,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:05,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 18:13:05,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 18:13:05,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=248, Unknown=1, NotChecked=32, Total=342 [2023-08-30 18:13:05,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 563 [2023-08-30 18:13:05,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 202 transitions, 1877 flow. Second operand has 19 states, 19 states have (on average 206.47368421052633) internal successors, (3923), 19 states have internal predecessors, (3923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:05,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:05,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 563 [2023-08-30 18:13:05,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:05,982 INFO L130 PetriNetUnfolder]: 835/2424 cut-off events. [2023-08-30 18:13:05,983 INFO L131 PetriNetUnfolder]: For 12866/12875 co-relation queries the response was YES. [2023-08-30 18:13:05,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10041 conditions, 2424 events. 835/2424 cut-off events. For 12866/12875 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 18551 event pairs, 308 based on Foata normal form. 3/2320 useless extension candidates. Maximal degree in co-relation 9925. Up to 1031 conditions per place. [2023-08-30 18:13:05,996 INFO L137 encePairwiseOnDemand]: 550/563 looper letters, 161 selfloop transitions, 40 changer transitions 43/256 dead transitions. [2023-08-30 18:13:05,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 256 transitions, 2780 flow [2023-08-30 18:13:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 18:13:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 18:13:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2122 transitions. [2023-08-30 18:13:05,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37690941385435167 [2023-08-30 18:13:05,998 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2122 transitions. [2023-08-30 18:13:05,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2122 transitions. [2023-08-30 18:13:05,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:05,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2122 transitions. [2023-08-30 18:13:06,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 212.2) internal successors, (2122), 10 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:06,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 563.0) internal successors, (6193), 11 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:06,003 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 563.0) internal successors, (6193), 11 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:06,003 INFO L175 Difference]: Start difference. First operand has 214 places, 202 transitions, 1877 flow. Second operand 10 states and 2122 transitions. [2023-08-30 18:13:06,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 256 transitions, 2780 flow [2023-08-30 18:13:06,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 256 transitions, 2618 flow, removed 68 selfloop flow, removed 9 redundant places. [2023-08-30 18:13:06,029 INFO L231 Difference]: Finished difference. Result has 213 places, 173 transitions, 1637 flow [2023-08-30 18:13:06,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1637, PETRI_PLACES=213, PETRI_TRANSITIONS=173} [2023-08-30 18:13:06,029 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 126 predicate places. [2023-08-30 18:13:06,029 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 173 transitions, 1637 flow [2023-08-30 18:13:06,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 206.47368421052633) internal successors, (3923), 19 states have internal predecessors, (3923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:06,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:06,030 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:06,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 18:13:06,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:06,235 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:06,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:06,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1526224196, now seen corresponding path program 2 times [2023-08-30 18:13:06,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:06,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066691612] [2023-08-30 18:13:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:06,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:06,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:06,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066691612] [2023-08-30 18:13:06,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066691612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:06,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2900385] [2023-08-30 18:13:06,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:13:06,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:06,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:06,493 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) [2023-08-30 18:13:06,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 18:13:06,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:13:06,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:13:06,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 18:13:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:06,724 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:06,724 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 138 treesize of output 141 [2023-08-30 18:13:06,738 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:06,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:13:06,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:13:06,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:06,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:06,820 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 19 treesize of output 11 [2023-08-30 18:13:06,858 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 19 treesize of output 11 [2023-08-30 18:13:06,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:06,928 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 19 treesize of output 11 [2023-08-30 18:13:06,964 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 19 treesize of output 11 [2023-08-30 18:13:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 18:13:06,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 4 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 18:13:07,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2900385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:07,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:07,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2023-08-30 18:13:07,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521931088] [2023-08-30 18:13:07,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:07,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 18:13:07,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:07,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 18:13:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=275, Unknown=2, NotChecked=0, Total=342 [2023-08-30 18:13:07,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 563 [2023-08-30 18:13:07,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 173 transitions, 1637 flow. Second operand has 19 states, 19 states have (on average 206.42105263157896) internal successors, (3922), 19 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:07,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:07,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 563 [2023-08-30 18:13:07,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:07,936 INFO L130 PetriNetUnfolder]: 727/2075 cut-off events. [2023-08-30 18:13:07,937 INFO L131 PetriNetUnfolder]: For 10556/10560 co-relation queries the response was YES. [2023-08-30 18:13:07,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8687 conditions, 2075 events. 727/2075 cut-off events. For 10556/10560 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 15124 event pairs, 248 based on Foata normal form. 3/2010 useless extension candidates. Maximal degree in co-relation 8151. Up to 954 conditions per place. [2023-08-30 18:13:07,946 INFO L137 encePairwiseOnDemand]: 551/563 looper letters, 84 selfloop transitions, 13 changer transitions 118/223 dead transitions. [2023-08-30 18:13:07,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 223 transitions, 2494 flow [2023-08-30 18:13:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:13:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:13:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1907 transitions. [2023-08-30 18:13:07,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37635681863035325 [2023-08-30 18:13:07,948 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1907 transitions. [2023-08-30 18:13:07,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1907 transitions. [2023-08-30 18:13:07,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:07,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1907 transitions. [2023-08-30 18:13:07,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.88888888888889) internal successors, (1907), 9 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:07,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:07,953 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:07,953 INFO L175 Difference]: Start difference. First operand has 213 places, 173 transitions, 1637 flow. Second operand 9 states and 1907 transitions. [2023-08-30 18:13:07,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 223 transitions, 2494 flow [2023-08-30 18:13:07,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 223 transitions, 2256 flow, removed 28 selfloop flow, removed 26 redundant places. [2023-08-30 18:13:07,975 INFO L231 Difference]: Finished difference. Result has 189 places, 86 transitions, 763 flow [2023-08-30 18:13:07,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=763, PETRI_PLACES=189, PETRI_TRANSITIONS=86} [2023-08-30 18:13:07,976 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 102 predicate places. [2023-08-30 18:13:07,976 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 86 transitions, 763 flow [2023-08-30 18:13:07,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 206.42105263157896) internal successors, (3922), 19 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:07,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:07,976 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:07,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-30 18:13:08,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:08,178 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 18:13:08,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:08,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1103531754, now seen corresponding path program 2 times [2023-08-30 18:13:08,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:08,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438058048] [2023-08-30 18:13:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:08,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:13:08,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:08,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438058048] [2023-08-30 18:13:08,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438058048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:08,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031231319] [2023-08-30 18:13:08,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:13:08,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:08,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:08,449 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) [2023-08-30 18:13:08,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 18:13:08,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:13:08,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:13:08,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 18:13:08,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:08,695 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 18:13:08,695 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 138 treesize of output 141 [2023-08-30 18:13:08,709 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-30 18:13:08,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 134 [2023-08-30 18:13:08,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 116 treesize of output 116 [2023-08-30 18:13:08,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:08,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:08,800 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 19 treesize of output 11 [2023-08-30 18:13:08,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 18:13:08,846 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 19 treesize of output 11 [2023-08-30 18:13:08,896 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 19 treesize of output 11 [2023-08-30 18:13:08,922 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 19 treesize of output 11 [2023-08-30 18:13:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:13:08,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 18:13:09,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031231319] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:09,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:09,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-30 18:13:09,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729171777] [2023-08-30 18:13:09,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:09,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 18:13:09,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:09,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 18:13:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-08-30 18:13:09,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 563 [2023-08-30 18:13:09,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 86 transitions, 763 flow. Second operand has 18 states, 18 states have (on average 244.44444444444446) internal successors, (4400), 18 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:09,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:09,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 563 [2023-08-30 18:13:09,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:09,918 INFO L130 PetriNetUnfolder]: 246/733 cut-off events. [2023-08-30 18:13:09,918 INFO L131 PetriNetUnfolder]: For 2935/2937 co-relation queries the response was YES. [2023-08-30 18:13:09,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2935 conditions, 733 events. 246/733 cut-off events. For 2935/2937 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4032 event pairs, 121 based on Foata normal form. 3/734 useless extension candidates. Maximal degree in co-relation 2884. Up to 448 conditions per place. [2023-08-30 18:13:09,920 INFO L137 encePairwiseOnDemand]: 552/563 looper letters, 0 selfloop transitions, 0 changer transitions 103/103 dead transitions. [2023-08-30 18:13:09,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 103 transitions, 1120 flow [2023-08-30 18:13:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 18:13:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 18:13:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2214 transitions. [2023-08-30 18:13:09,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369449378330373 [2023-08-30 18:13:09,923 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2214 transitions. [2023-08-30 18:13:09,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2214 transitions. [2023-08-30 18:13:09,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:09,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2214 transitions. [2023-08-30 18:13:09,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:09,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:09,927 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 563.0) internal successors, (5630), 10 states have internal predecessors, (5630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:09,927 INFO L175 Difference]: Start difference. First operand has 189 places, 86 transitions, 763 flow. Second operand 9 states and 2214 transitions. [2023-08-30 18:13:09,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 103 transitions, 1120 flow [2023-08-30 18:13:09,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 103 transitions, 885 flow, removed 51 selfloop flow, removed 36 redundant places. [2023-08-30 18:13:09,933 INFO L231 Difference]: Finished difference. Result has 115 places, 0 transitions, 0 flow [2023-08-30 18:13:09,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=115, PETRI_TRANSITIONS=0} [2023-08-30 18:13:09,933 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 28 predicate places. [2023-08-30 18:13:09,933 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 0 transitions, 0 flow [2023-08-30 18:13:09,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 244.44444444444446) internal successors, (4400), 18 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:09,934 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-30 18:13:09,934 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 18:13:09,934 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 18:13:09,934 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 18:13:09,934 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 18:13:09,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 18:13:10,139 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,SelfDestructingSolverStorable31 [2023-08-30 18:13:10,140 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 18:13:10,140 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-30 18:13:10,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 319 transitions, 668 flow [2023-08-30 18:13:10,181 INFO L130 PetriNetUnfolder]: 106/608 cut-off events. [2023-08-30 18:13:10,181 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 18:13:10,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 608 events. 106/608 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2559 event pairs, 1 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-08-30 18:13:10,185 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 319 transitions, 668 flow [2023-08-30 18:13:10,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 317 transitions, 664 flow [2023-08-30 18:13:10,187 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:13:10,187 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 317 transitions, 664 flow [2023-08-30 18:13:10,188 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 317 transitions, 664 flow [2023-08-30 18:13:10,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 317 transitions, 664 flow [2023-08-30 18:13:10,226 INFO L130 PetriNetUnfolder]: 105/606 cut-off events. [2023-08-30 18:13:10,226 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 18:13:10,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 606 events. 105/606 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2552 event pairs, 1 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 430. Up to 16 conditions per place. [2023-08-30 18:13:10,239 INFO L119 LiptonReduction]: Number of co-enabled transitions 47880 [2023-08-30 18:13:13,617 INFO L134 LiptonReduction]: Checked pairs total: 112969 [2023-08-30 18:13:13,617 INFO L136 LiptonReduction]: Total number of compositions: 239 [2023-08-30 18:13:13,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:13:13,620 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=true, 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;@10dacd6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:13:13,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-30 18:13:13,627 INFO L130 PetriNetUnfolder]: 58/172 cut-off events. [2023-08-30 18:13:13,627 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 18:13:13,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:13,627 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 18:13:13,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:13:13,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1482566382, now seen corresponding path program 1 times [2023-08-30 18:13:13,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:13,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892230216] [2023-08-30 18:13:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:13,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:13:13,651 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:13:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:13:13,681 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:13:13,684 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:13:13,684 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-30 18:13:13,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-30 18:13:13,685 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 18:13:13,686 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-30 18:13:13,686 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:13:13,686 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 18:13:13,704 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 18:13:13,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 378 transitions, 800 flow [2023-08-30 18:13:13,820 INFO L130 PetriNetUnfolder]: 152/856 cut-off events. [2023-08-30 18:13:13,820 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 18:13:13,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 856 events. 152/856 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3889 event pairs, 6 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 628. Up to 32 conditions per place. [2023-08-30 18:13:13,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 378 transitions, 800 flow [2023-08-30 18:13:13,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 376 transitions, 796 flow [2023-08-30 18:13:13,836 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:13:13,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 318 places, 376 transitions, 796 flow [2023-08-30 18:13:13,836 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 318 places, 376 transitions, 796 flow [2023-08-30 18:13:13,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 376 transitions, 796 flow [2023-08-30 18:13:13,908 INFO L130 PetriNetUnfolder]: 151/854 cut-off events. [2023-08-30 18:13:13,908 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 18:13:13,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 854 events. 151/854 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3888 event pairs, 6 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 626. Up to 32 conditions per place. [2023-08-30 18:13:13,945 INFO L119 LiptonReduction]: Number of co-enabled transitions 77520 [2023-08-30 18:13:18,614 INFO L134 LiptonReduction]: Checked pairs total: 173327 [2023-08-30 18:13:18,615 INFO L136 LiptonReduction]: Total number of compositions: 288 [2023-08-30 18:13:18,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:13:18,616 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=true, 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;@10dacd6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:13:18,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 18:13:18,618 INFO L130 PetriNetUnfolder]: 7/26 cut-off events. [2023-08-30 18:13:18,618 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:13:18,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:18,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 18:13:18,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 18:13:18,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:18,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1204857714, now seen corresponding path program 1 times [2023-08-30 18:13:18,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:18,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671294619] [2023-08-30 18:13:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:18,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:13:18,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:18,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671294619] [2023-08-30 18:13:18,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671294619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:13:18,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:13:18,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:13:18,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491336650] [2023-08-30 18:13:18,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:13:18,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:13:18,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:13:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:13:18,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 666 [2023-08-30 18:13:18,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 160 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:13:18,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:18,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 666 [2023-08-30 18:13:18,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand