./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.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_91-arrayloop2_racefree.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 ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 --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 18:15:43,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:15:43,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:15:43,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:15:43,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:15:43,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:15:43,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:15:43,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:15:43,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:15:43,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:15:43,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:15:43,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:15:43,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:15:43,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:15:43,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:15:43,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:15:43,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:15:43,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:15:43,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:15:43,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:15:43,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:15:43,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:15:43,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:15:43,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:15:43,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:15:43,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:15:43,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:15:43,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:15:43,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:15:43,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:15:43,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:15:43,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:15:43,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:15:43,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:15:43,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:15:43,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:15:43,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:15:43,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:15:43,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:15:43,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:15:43,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:15:43,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:15:43,389 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:15:43,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:15:43,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:15:43,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:15:43,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:15:43,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:15:43,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:15:43,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:15:43,393 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:15:43,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:15:43,394 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:15:43,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:15:43,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:15:43,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:15:43,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:15:43,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:15:43,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:15:43,395 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:15:43,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:15:43,395 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:15:43,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:15:43,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:15:43,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:15:43,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:15:43,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:15:43,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:15:43,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:15:43,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:15:43,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:15:43,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:15:43,397 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:15:43,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:15:43,398 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:15:43,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:15:43,398 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:15:43,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac583c9331a2ad916f4c22969f16915d9226d22c75c23a992e6ef02ec672d4b3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:15:43,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:15:43,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:15:43,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:15:43,692 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:15:43,692 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:15:43,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-08-30 18:15:44,838 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:15:45,161 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:15:45,162 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_91-arrayloop2_racefree.i [2023-08-30 18:15:45,179 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbf2d7169/e9f387dfe0a6409a8d80e6f371a9003e/FLAG2c28e6598 [2023-08-30 18:15:45,200 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbf2d7169/e9f387dfe0a6409a8d80e6f371a9003e [2023-08-30 18:15:45,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:15:45,203 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:15:45,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:15:45,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:15:45,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:15:45,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16957da6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45, skipping insertion in model container [2023-08-30 18:15:45,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:15:45,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:15:45,650 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_91-arrayloop2_racefree.i[47038,47051] [2023-08-30 18:15:45,665 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,667 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,667 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,669 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:15:45,710 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:15:45,751 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_91-arrayloop2_racefree.i[47038,47051] [2023-08-30 18:15:45,753 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,754 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,754 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,754 WARN L1562 CHandler]: Possible shadowing of function new [2023-08-30 18:15:45,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:15:45,877 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:15:45,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45 WrapperNode [2023-08-30 18:15:45,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:15:45,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:15:45,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:15:45,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:15:45,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,947 INFO L138 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 184 [2023-08-30 18:15:45,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:15:45,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:15:45,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:15:45,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:15:45,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,994 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:45,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:46,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:15:46,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:15:46,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:15:46,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:15:46,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (1/1) ... [2023-08-30 18:15:46,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:15:46,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:15:46,031 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 18:15:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:15:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 18:15:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:15:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:15:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:15:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 18:15:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:15:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:15:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 18:15:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 18:15:46,060 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 18:15:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:15:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:15:46,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:15:46,040 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 18:15:46,069 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 18:15:46,302 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:15:46,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:15:46,638 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:15:46,648 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:15:46,649 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-30 18:15:46,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:15:46 BoogieIcfgContainer [2023-08-30 18:15:46,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:15:46,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:15:46,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:15:46,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:15:46,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:15:45" (1/3) ... [2023-08-30 18:15:46,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4f0faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:15:46, skipping insertion in model container [2023-08-30 18:15:46,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:45" (2/3) ... [2023-08-30 18:15:46,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4f0faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:15:46, skipping insertion in model container [2023-08-30 18:15:46,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:15:46" (3/3) ... [2023-08-30 18:15:46,659 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_91-arrayloop2_racefree.i [2023-08-30 18:15:46,666 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:15:46,674 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:15:46,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:15:46,675 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:15:46,768 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 18:15:46,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 184 transitions, 376 flow [2023-08-30 18:15:46,891 INFO L130 PetriNetUnfolder]: 26/200 cut-off events. [2023-08-30 18:15:46,892 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-30 18:15:46,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 200 events. 26/200 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 481 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 108. Up to 4 conditions per place. [2023-08-30 18:15:46,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 184 transitions, 376 flow [2023-08-30 18:15:46,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 179 transitions, 363 flow [2023-08-30 18:15:46,910 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:15:46,921 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 179 transitions, 363 flow [2023-08-30 18:15:46,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 179 transitions, 363 flow [2023-08-30 18:15:46,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 179 transitions, 363 flow [2023-08-30 18:15:46,977 INFO L130 PetriNetUnfolder]: 25/195 cut-off events. [2023-08-30 18:15:46,978 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:15:46,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 195 events. 25/195 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 423 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 108. Up to 4 conditions per place. [2023-08-30 18:15:46,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 3828 [2023-08-30 18:15:58,339 WARN L222 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:16:03,629 WARN L222 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:16:09,492 WARN L222 SmtUtils]: Spent 5.86s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:16:15,248 WARN L222 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 18:16:15,488 INFO L134 LiptonReduction]: Checked pairs total: 3796 [2023-08-30 18:16:15,488 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-08-30 18:16:15,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:16:15,503 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;@5c1a1eda, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:16:15,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 18:16:15,511 INFO L130 PetriNetUnfolder]: 8/28 cut-off events. [2023-08-30 18:16:15,511 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:16:15,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:15,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:15,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:16:15,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2060380969, now seen corresponding path program 1 times [2023-08-30 18:16:15,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:15,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549482178] [2023-08-30 18:16:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:15,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:16:15,819 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 18:16:15,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:15,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549482178] [2023-08-30 18:16:15,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549482178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:16:15,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:16:15,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:16:15,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699188077] [2023-08-30 18:16:15,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:16:15,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:16:15,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:15,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:16:15,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:16:15,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 358 [2023-08-30 18:16:15,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 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 18:16:15,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:15,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 358 [2023-08-30 18:16:15,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:16,067 INFO L130 PetriNetUnfolder]: 48/113 cut-off events. [2023-08-30 18:16:16,068 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:16:16,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 113 events. 48/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 287 event pairs, 33 based on Foata normal form. 8/93 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2023-08-30 18:16:16,074 INFO L137 encePairwiseOnDemand]: 345/358 looper letters, 22 selfloop transitions, 2 changer transitions 1/29 dead transitions. [2023-08-30 18:16:16,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 113 flow [2023-08-30 18:16:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:16:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:16:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-30 18:16:16,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4776536312849162 [2023-08-30 18:16:16,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-30 18:16:16,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-30 18:16:16,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:16,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-30 18:16:16,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 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 18:16:16,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 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 18:16:16,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 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 18:16:16,120 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 77 flow. Second operand 3 states and 513 transitions. [2023-08-30 18:16:16,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 113 flow [2023-08-30 18:16:16,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 113 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:16:16,126 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 67 flow [2023-08-30 18:16:16,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-08-30 18:16:16,131 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-30 18:16:16,132 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 67 flow [2023-08-30 18:16:16,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 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 18:16:16,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:16,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:16,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:16:16,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:16:16,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:16,145 INFO L85 PathProgramCache]: Analyzing trace with hash -6251421, now seen corresponding path program 1 times [2023-08-30 18:16:16,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:16,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821596050] [2023-08-30 18:16:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:16,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:16:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:16:16,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:16,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821596050] [2023-08-30 18:16:16,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821596050] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:16:16,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:16:16,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:16:16,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872965937] [2023-08-30 18:16:16,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:16:16,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:16:16,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:16,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:16:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:16:16,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 358 [2023-08-30 18:16:16,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 18:16:16,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:16,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 358 [2023-08-30 18:16:16,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:16,442 INFO L130 PetriNetUnfolder]: 45/108 cut-off events. [2023-08-30 18:16:16,442 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:16:16,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 108 events. 45/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 255 event pairs, 30 based on Foata normal form. 2/90 useless extension candidates. Maximal degree in co-relation 198. Up to 93 conditions per place. [2023-08-30 18:16:16,443 INFO L137 encePairwiseOnDemand]: 355/358 looper letters, 21 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-08-30 18:16:16,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 115 flow [2023-08-30 18:16:16,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:16:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:16:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-30 18:16:16,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4655493482309125 [2023-08-30 18:16:16,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-30 18:16:16,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-30 18:16:16,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:16,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-30 18:16:16,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 18:16:16,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 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 18:16:16,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 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 18:16:16,449 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 67 flow. Second operand 3 states and 500 transitions. [2023-08-30 18:16:16,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 115 flow [2023-08-30 18:16:16,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:16:16,451 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 79 flow [2023-08-30 18:16:16,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-08-30 18:16:16,452 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-30 18:16:16,452 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 79 flow [2023-08-30 18:16:16,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 18:16:16,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:16,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:16,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 18:16:16,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:16:16,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1279361771, now seen corresponding path program 1 times [2023-08-30 18:16:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:16,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120486280] [2023-08-30 18:16:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:16,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:16,493 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:16:16,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454886937] [2023-08-30 18:16:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:16,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:16,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:16,496 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 18:16:16,532 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 18:16:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:16:16,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:16:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:16:16,696 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 18:16:16,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:16:16,713 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 18:16:16,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:16,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120486280] [2023-08-30 18:16:16,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:16:16,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454886937] [2023-08-30 18:16:16,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454886937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:16:16,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:16:16,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-30 18:16:16,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217787276] [2023-08-30 18:16:16,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:16:16,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:16:16,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:16,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:16:16,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:16:16,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 358 [2023-08-30 18:16:16,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 79 flow. Second operand has 6 states, 6 states have (on average 160.33333333333334) internal successors, (962), 6 states have internal predecessors, (962), 0 states have call successors, (0), 0 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 18:16:16,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:16,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 358 [2023-08-30 18:16:16,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:17,041 INFO L130 PetriNetUnfolder]: 45/114 cut-off events. [2023-08-30 18:16:17,042 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 18:16:17,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 114 events. 45/114 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 267 event pairs, 30 based on Foata normal form. 6/100 useless extension candidates. Maximal degree in co-relation 205. Up to 93 conditions per place. [2023-08-30 18:16:17,043 INFO L137 encePairwiseOnDemand]: 355/358 looper letters, 21 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-08-30 18:16:17,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 143 flow [2023-08-30 18:16:17,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:16:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:16:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 976 transitions. [2023-08-30 18:16:17,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543761638733706 [2023-08-30 18:16:17,046 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 976 transitions. [2023-08-30 18:16:17,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 976 transitions. [2023-08-30 18:16:17,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:17,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 976 transitions. [2023-08-30 18:16:17,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.66666666666666) internal successors, (976), 6 states have internal predecessors, (976), 0 states have call successors, (0), 0 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 18:16:17,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 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 18:16:17,053 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 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 18:16:17,054 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 79 flow. Second operand 6 states and 976 transitions. [2023-08-30 18:16:17,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 143 flow [2023-08-30 18:16:17,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 18:16:17,055 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 117 flow [2023-08-30 18:16:17,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 18:16:17,056 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2023-08-30 18:16:17,056 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 117 flow [2023-08-30 18:16:17,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 160.33333333333334) internal successors, (962), 6 states have internal predecessors, (962), 0 states have call successors, (0), 0 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 18:16:17,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:17,057 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:17,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 18:16:17,271 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 18:16:17,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:16:17,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:17,272 INFO L85 PathProgramCache]: Analyzing trace with hash 141310179, now seen corresponding path program 2 times [2023-08-30 18:16:17,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:17,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419047946] [2023-08-30 18:16:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:17,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:17,370 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:16:17,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150131413] [2023-08-30 18:16:17,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:16:17,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:17,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:17,377 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 18:16:17,404 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 18:16:17,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:16:17,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:16:17,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 18:16:17,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:16:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:16:17,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:16:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:16:17,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:17,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419047946] [2023-08-30 18:16:17,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:16:17,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150131413] [2023-08-30 18:16:17,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150131413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:16:17,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:16:17,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-08-30 18:16:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764565271] [2023-08-30 18:16:17,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:16:17,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 18:16:17,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 18:16:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-30 18:16:17,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 358 [2023-08-30 18:16:17,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 117 flow. Second operand has 12 states, 12 states have (on average 159.66666666666666) internal successors, (1916), 12 states have internal predecessors, (1916), 0 states have call successors, (0), 0 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 18:16:17,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:17,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 358 [2023-08-30 18:16:17,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:18,444 INFO L130 PetriNetUnfolder]: 45/126 cut-off events. [2023-08-30 18:16:18,445 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 18:16:18,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 126 events. 45/126 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 315 event pairs, 30 based on Foata normal form. 12/118 useless extension candidates. Maximal degree in co-relation 201. Up to 93 conditions per place. [2023-08-30 18:16:18,446 INFO L137 encePairwiseOnDemand]: 355/358 looper letters, 21 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-08-30 18:16:18,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 217 flow [2023-08-30 18:16:18,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 18:16:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 18:16:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1933 transitions. [2023-08-30 18:16:18,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4499534450651769 [2023-08-30 18:16:18,451 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1933 transitions. [2023-08-30 18:16:18,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1933 transitions. [2023-08-30 18:16:18,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:18,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1933 transitions. [2023-08-30 18:16:18,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 161.08333333333334) internal successors, (1933), 12 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 18:16:18,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 358.0) internal successors, (4654), 13 states have internal predecessors, (4654), 0 states have call successors, (0), 0 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 18:16:18,464 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 358.0) internal successors, (4654), 13 states have internal predecessors, (4654), 0 states have call successors, (0), 0 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 18:16:18,464 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 117 flow. Second operand 12 states and 1933 transitions. [2023-08-30 18:16:18,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 217 flow [2023-08-30 18:16:18,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 203 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 18:16:18,467 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 199 flow [2023-08-30 18:16:18,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=199, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2023-08-30 18:16:18,467 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 26 predicate places. [2023-08-30 18:16:18,468 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 199 flow [2023-08-30 18:16:18,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 159.66666666666666) internal successors, (1916), 12 states have internal predecessors, (1916), 0 states have call successors, (0), 0 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 18:16:18,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:18,469 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:18,477 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 18:16:18,677 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,SelfDestructingSolverStorable3 [2023-08-30 18:16:18,678 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:16:18,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:18,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1266117539, now seen corresponding path program 3 times [2023-08-30 18:16:18,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:18,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178307107] [2023-08-30 18:16:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:18,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:18,807 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:16:18,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318987827] [2023-08-30 18:16:18,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:16:18,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:18,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:18,809 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 18:16:18,836 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 18:16:19,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:16:19,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:16:19,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:16:19,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:16:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:16:19,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:16:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 18:16:19,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:19,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178307107] [2023-08-30 18:16:19,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:16:19,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318987827] [2023-08-30 18:16:19,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318987827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:16:19,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:16:19,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-30 18:16:19,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972158177] [2023-08-30 18:16:19,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:16:19,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:16:19,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:19,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:16:19,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 18:16:19,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 358 [2023-08-30 18:16:19,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 160.66666666666666) internal successors, (964), 6 states have internal predecessors, (964), 0 states have call successors, (0), 0 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 18:16:19,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:19,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 358 [2023-08-30 18:16:19,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:19,666 INFO L130 PetriNetUnfolder]: 47/153 cut-off events. [2023-08-30 18:16:19,667 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-30 18:16:19,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 153 events. 47/153 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 253 event pairs, 30 based on Foata normal form. 3/136 useless extension candidates. Maximal degree in co-relation 310. Up to 87 conditions per place. [2023-08-30 18:16:19,668 INFO L137 encePairwiseOnDemand]: 354/358 looper letters, 65 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2023-08-30 18:16:19,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 690 flow [2023-08-30 18:16:19,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:16:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:16:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 982 transitions. [2023-08-30 18:16:19,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45716945996275604 [2023-08-30 18:16:19,671 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 982 transitions. [2023-08-30 18:16:19,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 982 transitions. [2023-08-30 18:16:19,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:19,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 982 transitions. [2023-08-30 18:16:19,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.66666666666666) internal successors, (982), 6 states have internal predecessors, (982), 0 states have call successors, (0), 0 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 18:16:19,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 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 18:16:19,677 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 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 18:16:19,677 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 199 flow. Second operand 6 states and 982 transitions. [2023-08-30 18:16:19,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 690 flow [2023-08-30 18:16:19,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 496 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-08-30 18:16:19,682 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 234 flow [2023-08-30 18:16:19,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2023-08-30 18:16:19,683 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2023-08-30 18:16:19,683 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 234 flow [2023-08-30 18:16:19,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 160.66666666666666) internal successors, (964), 6 states have internal predecessors, (964), 0 states have call successors, (0), 0 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 18:16:19,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:19,684 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:19,696 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 18:16:19,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:19,897 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:16:19,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:19,898 INFO L85 PathProgramCache]: Analyzing trace with hash -262044911, now seen corresponding path program 4 times [2023-08-30 18:16:19,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:19,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588019801] [2023-08-30 18:16:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:19,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:20,326 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:16:20,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086452787] [2023-08-30 18:16:20,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:16:20,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:20,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:20,328 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 18:16:20,330 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 18:16:22,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:16:22,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:16:22,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 9526 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 18:16:22,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:16:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-08-30 18:16:22,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:16:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-08-30 18:16:22,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:16:22,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588019801] [2023-08-30 18:16:22,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 18:16:22,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086452787] [2023-08-30 18:16:22,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086452787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:16:22,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:16:22,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-08-30 18:16:22,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509302342] [2023-08-30 18:16:22,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 18:16:22,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 18:16:22,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:16:22,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 18:16:22,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-08-30 18:16:23,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 358 [2023-08-30 18:16:23,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 234 flow. Second operand has 24 states, 24 states have (on average 159.45833333333334) internal successors, (3827), 24 states have internal predecessors, (3827), 0 states have call successors, (0), 0 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 18:16:23,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:16:23,028 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 358 [2023-08-30 18:16:23,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:16:24,250 INFO L130 PetriNetUnfolder]: 47/201 cut-off events. [2023-08-30 18:16:24,250 INFO L131 PetriNetUnfolder]: For 3489/3489 co-relation queries the response was YES. [2023-08-30 18:16:24,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 201 events. 47/201 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 253 event pairs, 30 based on Foata normal form. 48/229 useless extension candidates. Maximal degree in co-relation 423. Up to 99 conditions per place. [2023-08-30 18:16:24,252 INFO L137 encePairwiseOnDemand]: 355/358 looper letters, 23 selfloop transitions, 24 changer transitions 0/51 dead transitions. [2023-08-30 18:16:24,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 51 transitions, 400 flow [2023-08-30 18:16:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 18:16:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 18:16:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3847 transitions. [2023-08-30 18:16:24,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477420856610801 [2023-08-30 18:16:24,262 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3847 transitions. [2023-08-30 18:16:24,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3847 transitions. [2023-08-30 18:16:24,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:16:24,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3847 transitions. [2023-08-30 18:16:24,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 160.29166666666666) internal successors, (3847), 24 states have internal predecessors, (3847), 0 states have call successors, (0), 0 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 18:16:24,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 358.0) internal successors, (8950), 25 states have internal predecessors, (8950), 0 states have call successors, (0), 0 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 18:16:24,286 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 358.0) internal successors, (8950), 25 states have internal predecessors, (8950), 0 states have call successors, (0), 0 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 18:16:24,286 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 234 flow. Second operand 24 states and 3847 transitions. [2023-08-30 18:16:24,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 51 transitions, 400 flow [2023-08-30 18:16:24,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 51 transitions, 392 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 18:16:24,291 INFO L231 Difference]: Finished difference. Result has 89 places, 51 transitions, 468 flow [2023-08-30 18:16:24,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=468, PETRI_PLACES=89, PETRI_TRANSITIONS=51} [2023-08-30 18:16:24,293 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 64 predicate places. [2023-08-30 18:16:24,293 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 51 transitions, 468 flow [2023-08-30 18:16:24,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 159.45833333333334) internal successors, (3827), 24 states have internal predecessors, (3827), 0 states have call successors, (0), 0 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 18:16:24,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:16:24,295 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:16:24,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 18:16:24,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:24,509 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:16:24,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:16:24,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1681985775, now seen corresponding path program 5 times [2023-08-30 18:16:24,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:16:24,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727979802] [2023-08-30 18:16:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:16:24,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:16:25,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 18:16:25,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232092995] [2023-08-30 18:16:25,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:16:25,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:16:25,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:16:25,365 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 18:16:25,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15